A flute is played with a first harmonic of 196 Hz (a pitch of G3). The length of the air


column is 89. 2 cm (quite a long flute). Find the speed of the wave resonating in the


flute.

Answers

Answer 1

The speed of the wave resonating in the flute is approximately 349.664 m/s. To find the speed of the wave resonating in the flute, we can use the formula:

speed of wave = frequency x wavelength

We know that the frequency of the first harmonic (or fundamental frequency) of the flute is 196 Hz, which corresponds to a pitch of G3.

To find the wavelength, we need to use the formula for the wavelength of a standing wave in an air column that is open at both ends:

wavelength = 2L/n

where L is the length of the air column (in meters) and n is the harmonic number (for the first harmonic, n = 1).

In this case, we're given the length of the air column as 89.2 cm, which is 0.892 meters. So, plugging in the values, we get:

wavelength = 2 x 0.892 / 1
wavelength = 1.784 meters

Now that we have both the frequency and the wavelength, we can calculate the speed of the wave resonating in the flute:

speed of wave = frequency x wavelength
speed of wave = 196 Hz x 1.784 m
speed of wave = 349.664 m/s

So, the speed of the wave resonating in the flute is approximately 349.664 m/s.

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Related Questions

(b) The aluminium wire will break if the tension in the wire exceeds 350N.


The wire is attached to the flagpole at B, 0. 8 m from the wall.


The wire is at an angle of 20° to the flagpole.


Assess whether the wire will break. You should use the principle of moments, taking


moments about 0.


length of flagpole = 1. 2m


mass of flagpole and flag = 15 kg

Answers

The wire won't break because the tension is less than 350N. To assess whether the wire will break, we need to calculate the tension in the wire using the principle of moments to do this, taking moments about point 0.

First, we need to calculate the weight of the flagpole and flag. We know that mass = 15 kg, so we can use the formula weight = mass x gravity, where gravity = 9.8 m/s^2. Therefore, weight = 15 x 9.8 = 147 N.

Next, we need to calculate the force exerted by the wire. We can use trigonometry to find the horizontal and vertical components of this force. The horizontal component is given by F_h = F x cos θ, where F is the tension in the wire and θ is the angle between the wire and the flagpole. In this case, F_h = F x cos 20°.

The vertical component is given by F_v = F x sin θ. In this case, F_v = F x sin 20°.

Now, we can take moments about point 0. The weight of the flagpole and flag acts vertically downwards at a distance of 0.8 m from point 0, so its moment is 147 x 0.8 = 117.6 Nm (clockwise).

The force exerted by the wire acts at an angle of 20° to the flagpole, so its horizontal component acts perpendicular to the flagpole and its vertical component acts parallel to the flagpole. The horizontal component has no moment about point 0, so we only need to consider the vertical component. This acts at a distance of 1.2 m from point 0, so its moment is F_v x 1.2 (anticlockwise).

Setting the moments equal to each other, we get:

147 x 0.8 = F_v x 1.2 x  sin 20°

Simplifying this equation, we get:

F_v = 78.7 N

To find the tension in the wire, we can use Pythagoras' theorem:

F = √(F_h^2 + F_v^2) = √((F x cos 20°)^2 + 78.7^2)

Simplifying this equation, we get:

F = 87.6 N

Since the tension in the wire is less than 350N, the wire will not break.

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The orbit of the moon about the earth is approximately circular, with mean radius of 3,84. 108m. It takes 27,3 days for the moon to complete one revolution about the earth. Find: a) the mean orbital speed of the moon; b) its centripetal acceleration

Answers

The centripetal acceleration of the moon is approximately 0.0027 m/s².

To find the mean orbital speed of the moon and its centripetal acceleration, we'll use the given information of the moon's orbit radius and revolution time.

a) To find the mean orbital speed (v) of the moon, we'll use the formula v = 2 * π * r / T, where r is the orbit radius (3.84 x 10^8 m) and T is the revolution time (27.3 days, converted to seconds).

v = 2 * π * (3.84 x 10^8 m) / (27.3 days * 24 hours/day * 3600 s/hour) ≈ 1022 m/s

The mean orbital speed of the moon is approximately 1022 m/s.

b) To find the centripetal acceleration (a_c) of the moon, we'll use the formula a_c = v² / r.

a_c = (1022 m/s)² / (3.84 x 10⁸ m) ≈ 0.0027 m/s²

The centripetal acceleration of the moon is approximately 0.0027 m/s².

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A force compresses a bone by 1.0 mm. A second bone has the same cross-sectional area but twice the length as the first. By how much would the same force compress this second bone? 0.50 mm 0 1.0 mm 2.0 mm 4.0 mm 8.0 mm

Answers

The compressibility of a bone is dependent on its material properties and geometry. If the first bone was compressed by 1.0 mm, the second bone will be compressed by 2.0 mm. Answer is 2.0 mm.

Since the second bone has the same cross-sectional area but twice the length as the first, it has twice the volume. Therefore, it would be expected to compress twice as much as the first bone, or 2.0 mm.
Hi! When considering the compression of a bone, we can use Hooke's Law, which states that the deformation (compression) is directly proportional to the applied force and inversely proportional to the material's stiffness.

For the second bone with twice the length, the same force will cause a greater deformation since the stiffness will be lower. Given that the cross-sectional area is the same, the second bone will be compressed by twice the amount of the first bone.

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You are using power pivot for the first time, but you do not see the power pivot tab. what is the most likely reason

Answers

The most likely reason for not seeing the Power Pivot tab is that the add-in is not enabled in Excel.

By default, the Power Pivot add-in is not enabled in Excel, and it needs to be enabled manually.

To enable the Power Pivot add-in, go to the File tab in Excel, select Options, and then select Add-Ins. In the Manage box, select COM Add-ins, and then select Go.

In the COM Add-Ins dialog box, select Microsoft Power Pivot for Excel, and then select OK.

After enabling the add-in, the Power Pivot tab should now be visible in Excel.

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In a typical lightning strike, 2. 5 c flows from cloud to ground in 0. 20 ms.

Answers

The average current during the lightning strike is approximately 12,500 amperes (A). It's important to note that lightning strikes involve extremely high currents and voltages, making them potentially dangerous and capable of causing significant damage.

When a lightning strike occurs, it involves a rapid discharge of electrical energy between a cloud and the ground. The statement you provided indicates that 2.5 coulombs (C) of charge flows from the cloud to the ground in 0.20 milliseconds (ms).

To calculate the average current during this time interval, we can use the formula:

Average current (I) = Charge (Q) / Time (t)

In this case, the charge is 2.5 C, and the time is 0.20 ms (which is equivalent to 0.20 x [tex]10^{(-3)[/tex] seconds). Plugging these values into the formula, we get:

I = 2.5 C / (0.20 x [tex]10^{(-3)[/tex] s)

I = 2.5 C / 2 x [tex]10^{(-4)[/tex]s

I = 12,500 A

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a wire of radius with 3.0 mm and length 200 m is melted into a sphere calculate the radius of the sphere in metres

Answers

The volume of wire can be calculated as follows:

V_wire = πr²l

where r is the radius of the wire, and l is the length of the wire.

Substituting the given values, we get:

V_wire = π(3.0 mm)²(200 m) = 1.8 x 10⁶ mm³

To calculate the radius of the sphere, we need to use the formula for the volume of a sphere:

V_sphere = (4/3)πr³

Equating the volume of the wire to the volume of the sphere, we get:

(4/3)πr³ = 1.8 x 10⁶ mm³

Solving for r, we get:

r = (3V_wire/4π)^(1/3)

r = [(3 x 1.8 x 10⁶)/(4π)]^(1/3)

r ≈ 20.15 m

Therefore, the radius of the sphere is approximately 20.15 meters.

Two charged spheres electron and proton are 10 cm apart attract each other.


The charge of the spheres are 9. 11 x 10-31 C and 1. 67 x 10-27 C. What force results


from each other? What will be the force if the separation is increased to 30 cm?

Answers

Force when The seperation is 10 cm= 1.36 x 10^-45 N and when it is 30 cm= 1.51 x 10^-46 N

To answer your question, we will use Coulomb's Law to calculate the force between the charged spheres (electron and proton). Coulomb's Law states:

F = k * (q1 * q2) / r^2

Where F is the force, k is the electrostatic constant (8.99 x 10^9 Nm^2/C^2), q1 and q2 are the charges of the spheres, and r is the distance between them.

Given the charges q1 = 9.11 x 10^-31 C (electron) and q2 = 1.67 x 10^-27 C (proton), and the initial distance r = 10 cm = 0.1 m, we can calculate the force:

F = (8.99 x 10^9 Nm^2/C^2) * (9.11 x 10^-31 C) * (1.67 x 10^-27 C) / (0.1 m)^2
F ≈ 1.35 x 10^-45 N

Now, let's calculate the force when the separation is increased to 30 cm = 0.3 m:

F_new = (8.99 x 10^9 Nm^2/C^2) * (9.11 x 10^-31 C) * (1.67 x 10^-27 C) / (0.3 m)^2
F_new ≈ 1.50 x 10^-46 N

So, the force between the charged spheres when they are 10 cm apart is approximately 1.35 x 10^-45 N, and when the separation is increased to 30 cm, the force becomes approximately 1.50 x 10^-46 N.

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How does a van de graaff generator create static electricity?.

Answers

Answer:

The generator makes static electricity the same way you do when you rub your feet on the carpet and then touch a doorknob.

Explanation:

. Inside the generator is a giant rubber band that rubs across a piece of felt, stealing its electrons. The rubber band then spins around and the electrons travel up to the big metal ball on top.

The arrows in this diagram are meant to show how gravitational equilibrium works in the sun. What do the different colors and different arrow lengths represent?.

Answers

In the context of the Sun, gravitational equilibrium refers to the balance between the inward gravitational force and the outward pressure force that acts within the Sun's interior. This equilibrium is crucial for maintaining the Sun's stability and preventing its collapse or runaway expansion.

In a simplified explanation, the gravitational force in the Sun's core is responsible for pulling matter inward. At the same time, the high temperatures and pressures in the core generate intense radiation pressure and gas pressure, pushing matter outward. The combination of these inward and outward forces creates a balance.

Different regions within the Sun contribute to this equilibrium, with variations in temperature, density, and pressure. These variations can result in different colors and arrow lengths in a diagram, which may represent the following:

1. Colors: Different colors might be used to represent different regions or layers within the Sun, each with its specific characteristics and properties. For example, the core, radiative zone, and convective zone of the Sun have distinct temperature and pressure profiles, which could be depicted using different colors.

2. Arrow Lengths: Arrow lengths might be used to illustrate the strength or magnitude of the forces involved. Longer arrows could indicate stronger forces, such as higher pressure or greater gravitational forces. Shorter arrows may represent weaker forces or areas where the forces balance each other.

It's important to note that the specific colors and arrow lengths used in a diagram can vary depending on the particular representation and the context of the diagram you are referring to. It would be helpful to provide a description or more specific details about the diagram for a more accurate interpretation.

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Jose does push-ups by applying a force to elevate his body 10 cm off the ground. he does 50 j of work. if jose does each push-up in two seconds, what is the power delivered?

physical science.
help please

Answers

Answer:

The power delivered by Jose when doing push-ups is 25 watts.

Step-by-step explanation:

The power delivered by Jose is:

[tex]\sf\qquad\dashrightarrow Power = \dfrac{Work}{Time}[/tex]

We know that Jose did 50 J of work in 2 seconds, so we can substitute these values into the equation:

[tex]\sf:\implies Power = \dfrac{50\: J}{2\: s}[/tex]

[tex]\sf:\implies \boxed{\bold{\:\:Power = 25\: W\:\:}}\:\:\:\green{\checkmark}[/tex]

Therefore, the power delivered by Jose when doing push-ups is 25 watts.

Dolphins communicate using various sounds, including whistles, clicks, and squeaks. Lower-frequency vocalizations are likely used in social communication, and high-frequency vocalizations are likely used in echolocation. If a dolphin is producing a vocalization with a frequency of 35 Hz traveling at 1,500 m/s, what is the wavelength of the sound?

Answers

The wavelength of the sound wave, given that wave has a frequency of 35 Hz and travelling at 1500 m/s is 42.86 m

How do i determine the wavelength?

First, we shall list out the given parameters from the question. This is given below:

Frequency of sound wave (f) = 35 HzSpeed of sound wave (v) = 1500 m/sWavelength of sound wave (λ) = ?

The wavelength of the sound wave can be obtained as illustrated below:

Velocity (v) = wavelength (λ) × frequency (f)

1500 = wavelength × 35

Divide both sides by 35

Wavelength = 1500 / 35

Wavelength = 42.86 m

Thus, from the above calculation, we can conclude that the wavelength of the sound wave is 42.86 m

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The force of __________ will be greater if one object has a larger mass than the other

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The force of gravity will be greater if one object has a larger mass than the other.

Gravity is the force of attraction between two objects with mass. According to Newton's law of gravitation, the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

F = G * (m₁ * m₂) / d²

where:

F = force of gravity

G = gravitational constant (a universal constant)

m₁, m₂ = masses of the two objects

d = distance between the two objects

As we can see from the formula, the force of gravity is directly proportional to the masses of the two objects. Therefore, if one object has a larger mass than the other, the force of gravity between them will be greater.

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Write an expression for the speed of the heavier mass as a function of their separation distance, r, which is measured cm to cm and decreases over time as the masses move toward each other due to their gravitational attraction.

Answers

The speed of the heavier mass as a function of their separation distance, r, can be expressed using the conservation of energy principle.

As the masses move toward each other due to gravitational attraction, their potential energy decreases and their kinetic energy increases, such that the total energy remains constant.

Therefore, we can write: 1/2 * m1 * [tex]v^{2}[/tex] = G * m1 * m2 / r

where m1 is the mass of the heavier object, m2 is the mass of the lighter object, v is the velocity of m1, r is the separation distance between the two objects, and G is the gravitational constant.

Solving for v, we get:

v = sqrt(2 * G * m2 / r)

This expression shows that as the separation distance r decreases, the velocity v of the heavier object increases due to the increasing gravitational attraction between the two masses.

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The particles ejected from the sun during a coronal mass ejection, if directed at earth, will reach us.

Answers

The statement is true.

If the particles ejected from the Sun during a coronal mass ejection (CME) are directed towards Earth, they can reach our planet.

Coronal mass ejections are powerful eruptions of plasma and magnetic field from the Sun's corona. These ejections can release a large amount of highly energetic particles, including protons, electrons, and ions, into space.

When a CME is Earth-directed, it can travel through the interplanetary medium, which includes the solar wind, and reach our planet. The time it takes for the CME to reach Earth can vary, but typically it ranges from a day to a few days.

When the CME particles interact with the Earth's magnetic field, they can cause a variety of effects, including geomagnetic storms and enhanced auroral displays. The charged particles from the CME can also interact with the Earth's magnetosphere, leading to disturbances in the ionosphere and potential disruptions in satellite communication, power grids, and other technological systems.

Scientists and space agencies closely monitor CMEs and their potential impact on Earth using spacecraft and ground-based observatories to provide early warnings and forecasts of their arrival.

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12) A girl of mass 50 Kg transports a box of mass 20 Kg up a flight of 10 steps, each step 20 cm


high. She takes 16 Seconds to climb up the steps.


a. What is her weight?


b. What is the weight of the box?


c. When she reaches the top what vertical height has she traveled?


Pls help its urgent and I will mark you brainliest

Answers

A girl carrying a 20 Kg box climbs up 10 steps, each 20 cm high, in 16 seconds. Her own mass is 50 Kg. Her weight is 490.5N. The weight of the box is 196.2 N. When the girl reaches the top, she has traveled a vertical height of 2 meters.

a. The girl's weight is given by the product of her mass and the acceleration due to gravity. Thus, her weight is:

Weight = mass x acceleration due to gravity

Weight = [tex]50 \;kg \times 9.81 \;m/s^2[/tex]

Weight = 490.5 N

b. The weight of the box is also given by the product of its mass and the acceleration due to gravity. Thus, its weight is:

Weight = mass x acceleration due to gravity

Weight = [tex]20 \;kg \times 9.81 \;m/s^2[/tex]

Weight = 196.2 N

c. The vertical height of each step is given as 20 cm or 0.2 m. Therefore, the total vertical height traveled by the girl is:

Total height = number of steps x height of each step

Total height = 10 steps x 0.2 m/step

Total height = 2 m

Hence, when the girl reaches the top, she has traveled a vertical height of 2 meters.

In summary, we calculated the weight of the girl and the box, and determined the vertical height traveled by the girl when she climbed a flight of 10 steps, each step 20 cm high, in 16 seconds.

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Why do expanding, aging stars become cooler and more luminous? an overproduction of energy causes the outer layers of gas to expand, whereby the energy is absorbed and the temperature increases. the resulting increase in radiated energy leads to increased luminosity. a decrease in energy causes the outer layers of gas to expand and the temperature to decrease. the resulting increase in radiated energy leads to increased luminosity. a decrease in energy causes the outer layers of gas to expand and the temperature to decrease, and the resulting increase in surface area leads to increased luminosity. an overproduction of energy causes the outer layers of gas to expand. when this happens, the surface area increases rapidly while the temperature decreases rather slowly, and therefore the luminosity increases.

Answers

Expanding, aging stars become cooler and more luminous because an overproduction of energy causes the outer layers of gas to expand, whereby the energy is absorbed and the temperature increases.  the resulting increase in radiated energy leads to increased luminosity

Define luminosity.

The radiant power that a light-emitting device emits over time is known as luminosity, which is an absolute measure of radiated electromagnetic power. The entire quantity of electromagnetic energy that a star, galaxy, or other celestial object emits over the course of one unit of time is known as luminosity in astronomy.

While the star's core contracts, the outer layers expand, and as the expansion continues, the luminosity rises. The radius and luminosity of a star with the mass of the sun expand 100 times throughout this expansion, which takes place over the course of around a billion years.

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what latitude would you have to travel to see the noontime sun at your zenith on october 3rd (practice with other dates)? could you explain your answer? earth's axis of rotation is titled by 23.5 degrees.

Answers

You would have to travel to a latitude of approximately 80.5 degrees north of the equator (or south, depending on your hemisphere) to see the noontime sun at your zenith on October 3rd.

To see the noontime sun at your zenith on October 3rd (or any other date), you would have to be located at a latitude equal to the complement of the Sun's declination on that date. The declination is the angle between the plane of the Earth's equator and the line connecting the Earth to the Sun, and it varies throughout the year due to the tilt of the Earth's axis of rotation.

On October 3rd, the Sun's declination is approximately 9.5 degrees south of the equator. To find the latitude at which the noontime Sun would be directly overhead, we take the complement of this declination, which is:

90 degrees - 9.5 degrees = 80.5 degrees

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If the current in a circuit is 3. 2 mA and the resistance of the wire used in the circuit is 250 Ω, what is the voltage of the fuel cell being used?



Formula;



Calculation;



Answer:

Answers

If the current in a circuit is 3. 2 mA and the resistance of the wire used in the circuit is 250 Ω, the voltage of the fuel cell being used in the circuit is 0.8 volts.

To calculate the voltage of the fuel cell being used in a circuit, we can use Ohm's law, which states that the voltage (V) equals the current (I) multiplied by the resistance (R): V = I x R.

In this case, the current is 3.2 mA (milliamperes), and the resistance of the wire used in the circuit is 250 Ω (ohms). We first need to convert the current to amperes by dividing it by 1000: 3.2 mA ÷ 1000 = 0.0032 A.

Next, we can substitute these values into the formula to calculate the voltage: [tex]V = 0.0032 \;A \times 250 \;\Omega = 0.8 \;volts.[/tex]

Therefore, the voltage of the fuel cell being used in the circuit is 0.8 volts.

In summary, to calculate the voltage of a fuel cell being used in a circuit, we can use Ohm's law, which states that voltage equals current multiplied by resistance.

By converting the current from milliamperes to amperes and substituting the values into the formula, we can determine the voltage of the fuel cell in volts.

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Use your data to predict what a 400g bag would weigh

Answers

The volume of the 400g bag of flour is 666.67 cm^3.

This question asks for the calculation of the volume of a 400g bag of flour with a density of 0.6 g/cm^3. The density of a material is defined as its mass per unit volume, and can be expressed mathematically as:

density = mass/volume.

Rearranging the equation to solve for volume, we get:

volume = mass/density.

Substituting the given values, we get:

Volume = 400 g / 0.6 g/cm^3

Solving for the volume, we get:

Volume = 666.67 cm^3
Volume = 400g / 0.6 g/cm^3, which simplifies to 666.67 cm^3.
Therefore, the volume of the 400g bag of flour is 666.67 cm^3.

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--The complete Question is, If a 400g bag of flour has a density of 0.6 g/cm^3, what is its volume in cm^3? --

A gas has a temperature of 14 °C, and a volume of 4. 5 L. If the temperature is raised to 29 °C and the pressure is not changed, what is the new volume of the gas? A. 4. 7 L B. 4. 9 L C. 5. 3 L D. 5. 5 L

Answers

The new volume of the gas when the temperature is raised to 29°C and the pressure is not changed is approximately :4.73 L. The correct option is A.

To determine the new volume of a gas when its temperature is changed, we can use Charles' Law. Charles' Law states that the volume of a gas is directly proportional to its temperature, provided that the pressure remains constant. Your initial temperature (T1) is 14°C, and the initial volume (V1) is 4.5 L.

The final temperature (T2) is 29°C, and we need to find the new volume (V2). Remember to convert the temperatures from Celsius to Kelvin by adding 273.15 to each value (T1 = 287.15 K, T2 = 302.15 K).

Using Charles' Law, we have:


V1/T1 = V2/T2

Now, we can plug in the values:


(4.5 L)/(287.15 K) = V2/(302.15 K)

To find V2, multiply both sides by 302.15 K:


V2 = (4.5 L x 302.15 K) / 287.15 K

V2 ≈ 4.73 L

The new volume of the gas when the temperature is raised to 29°C and the pressure is not changed is approximately 4.73 L. The correct option is A.

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Complete  question:

A gas has a temperature of 14 °C, and a volume of 4. 5 L. If the temperature is raised to 29 °C and the pressure is not changed, what is the new volume of the gas?

A. 4. 7 L

B. 4. 9 L

C. 5. 3 L

D. 5. 5 L

let us recall what is a magnet? How does it work?

Answers

Answer:

The magnets are surrounded by an invisible magnetic field that contains stored-up, or potential, energy. When attempting to push two like-sided poles together, the stored-up energy becomes movement, or kinetic energy, and forces them apart. The same principle happens when two unlike poles come together.

If I make a tortilla by mixing 55 grams of flour and 20 grams of water how much mass should my tortilla have

Answers

Answer:

Your tortilla would weigh 75 grams total.

Explanation:

55 grams of flour + 20 grams of water = 75 grams total

The tortilla should have a mass of 75 grams.

What is a mixture?

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means. In a mixture, each substance retains its own chemical identity and properties. The properties of a mixture can vary depending on the relative amounts of the substances that are mixed together.

There are two main types of mixtures: homogeneous and heterogeneous.

1. Homogeneous mixtures: These are also called solutions, and they have a uniform composition throughout. The components of a homogeneous mixture are not visible to the bare eye and cannot be separated by simple mechanical means. Examples of homogeneous mixtures include salt water, sugar in water, and air.

2. Heterogeneous mixtures: These are mixtures that do not have a uniform composition throughout. The components of a heterogeneous mixture are visible to the bare eye, and they can be separated by mechanical means such as filtration, sedimentation, or decantation. Examples of heterogeneous mixtures include a mixture of oil and water, a salad, and a mixture of sand and pebbles.

Here in the Question,

The total mass of the tortilla will be the sum of the mass of flour and the mass of water used to make it. So, the tortilla should have a mass of:

55 grams (flour) + 20 grams (water) = 75 grams.

Therefore, the Total mass of the tortilla is 75 Grams.

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Delivery of medicines to particular organ or tissue in a human body with the help of a direct current is named electrophoresis. in this case, two oppositely charged plates are applied to the body. (a) find charge that passes through the body during 10 min electrophoresis procedure if current used was =8 ma. (b) find current density value if electrodes area was = 150×180 cm2

Answers

The charge that passes through the body during a 10-minute electrophoresis procedure with a current of: 8 mA is 4.8 Coulombs, and the current density value with an electrode area of 150x180 cm² is approximately 0.296 A/m².

The delivery of medicines to a specific organ or tissue in the human body using a direct current is known as electrophoresis. In this case, two oppositely charged plates are applied to the body.

(a) To find the charge that passes through the body during a 10-minute electrophoresis procedure with a current of 8 mA, you can use the formula: Charge (Q) = Current (I) × Time (t). Since the current is given in milliamperes (mA), you'll need to convert it to amperes (A) by dividing by 1,000: 8 mA / 1,000 = 0.008 A.

The time is given in minutes, so convert it to seconds: 10 minutes × 60 seconds/minute = 600 seconds. Now, you can find the charge: Q = 0.008 A × 600 s = 4.8 Coulombs.

(b) To find the current density, you'll need to use the formula: Current Density (J) = Current (I) / Area (A). The electrode area is given as 150 x 180 cm², so you need to convert it to square meters: (150 x 180 cm²) / (10,000 cm²/m²) = 0.027 m². Now you can find the current density: J = 0.008 A / 0.027 m² ≈ 0.296 A/m².

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An electron moves with an unknown velocity through a magnetic field of 1. 56 T that points directly east. The electron experiences a force of 6. 24 x 10-15 N directly south. What is the magnitude and direction of the velocity? Show your work. (The charge of an electron is -1. 6 x 10-19 C)

Answers

The magnitude of the velocity is 0.0246 m/s and the direction of the velocity is directly north.

The magnetic force on a charged particle is the force experienced by a moving charged particle when it interacts with a magnetic field. When a charged particle moves through a magnetic field, it experiences a force that is perpendicular to both its velocity and the magnetic field direction. This force is known as the magnetic force or the Lorentz force.

The magnitude of the magnetic force is proportional to the charge of the particle, the magnitude of its velocity, and the strength of the magnetic field. The direction of the force is perpendicular to both the velocity vector and the magnetic field vector, following the right-hand rule.

It is given by the formula:

F = qvB

Where F is the force, q is the charge, v is the velocity, and B is the magnetic field.

F = 6.24 x 10⁻¹⁵ N (force)

q = -1.6 x 10⁻¹⁹ C (charge)

B = 1.56 T (magnetic field)

v = F / (qB)

v = (6.24 x 10⁻¹⁵ N) / (-1.6 x 10⁻¹⁹ C) / (1.56 T)

v = -0.0246 m/s

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15. True or flase: Condensation is the change of state from a liquid to a gas.._______

16. For a gas to become a liquid, large numbers of particles must clump together.
Particles clump together when the attraction between thm overcomes their_________

Answers

15. False. Condensation is the change of state from a gas to a liquid.

16. True. For a gas to become a liquid, large numbers of particles must clump together. Particles clump together when the attraction between them overcomes their kinetic energy. This attraction is known as intermolecular forces, which are responsible for holding particles together in a liquid state. As the temperature decreases, the kinetic energy of the particles decreases, and the intermolecular forces become stronger, causing the particles to come closer together and form a liquid.

How many grams are in 0. 02mol of Mg (25. 3g/mol)​

Answers

There are 0.486 grams of magnesium in 0.02 moles of magnesium.

To calculate the grams of magnesium, you multiply the given moles (0.02 mol) by the molar mass (24.3 g/mol):

0.02 mol Mg × 24.3 g/mol Mg = 0.486 g Mg

Therefore, there are 0.486 grams of magnesium in 0.02 moles of magnesium.

It's important to note that molar mass allows us to convert between moles and grams. By multiplying the number of moles by the molar mass, we can determine the mass of the substance in grams.

This conversion is commonly used in chemistry to relate the quantity of a substance in moles to its corresponding mass in grams.

In this case, by multiplying the given moles (0.02 mol) of magnesium by the molar mass of magnesium (24.3 g/mol), we obtain the mass of magnesium in grams (0.486 g).

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an 82-kg skater is pushed on a frictionless surface through a straight line displacement
of = (13.2m) î + (18.9m) û by a force = (182n) î + (121n) û .
how much work does the force do on the skater during this displacement?

Answers

The force does 4688.3 joules of work on the skater during this displacement.

The work done by a force on an object is defined as the product of the force and the displacement of the object in the direction of the force. In this problem, the displacement vector and the force vector are given.

To calculate the work done on the 82-kg skater during the displacement, you need to find the dot product of the force vector and the displacement vector. Here are the given vectors:

Force vector (F) = (182N) î + (121N) û
Displacement vector (d) = (13.2m) î + (18.9m) û

Work (W) = F • d = (182N * 13.2m) + (121N * 18.9m)

W = (2402.4 J) + (2285.9 J)

W = 4688.3 J

It is important to note that since the surface is frictionless, there is no loss of energy due to friction. This means that the work done by the force is equal to the change in the kinetic energy of the skater.

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which of the following is not evidence for an fp discussion? select one: a. we can not observe exoplanets around most stars. no, we can overcome this by understanding our observational limitations and account for non-detections. b. we have detected planets in the habitable zone. c. the kepler mission discovered 1000s of exoplanets, but it's success rate was very low. d. we observe disks around young stars. e. exoplanets are detected in binary systems.

Answers

We have detected planets in the habitable zone s not evidence against the discussion of the Fermi Paradox. Option B is correct.

The fp discussion refers to the Fermi Paradox, which is the apparent contradiction between the high probability of the existence of extraterrestrial civilizations and the lack of evidence for, or contact with, such civilizations. The presence of exoplanets in the habitable zone is actually evidence supporting the discussion of the Fermi Paradox, which asks why we haven't detected any signs of intelligent extraterrestrial life despite the high probability of its existence.

As the inability to observe exoplanets around most stars does not necessarily imply a contradiction with the Fermi Paradox. In fact, this limitation can be accounted for by understanding our observational capabilities and taking into account non-detections in our analysis. Option B is correct.

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Throughly explain how all organisms are connected and need each other

Answers

Throughly explaining how all organisms are connected and need each other: involves understanding the concept of ecosystems and the various relationships among organisms.

All organisms on Earth are connected through a complex network of interactions in ecosystems. These ecosystems are composed of biotic factors (living organisms) and abiotic factors (non-living elements such as air, water, and soil). Organisms are linked through relationships like predation, competition, and symbiosis, which help maintain a balance in these ecosystems.

In a food chain, organisms are connected as they depend on one another for nutrition. Producers (such as plants) use sunlight to create energy through photosynthesis. Consumers (such as animals) consume the producers or other consumers to obtain energy. Decomposers (such as fungi and bacteria) break down dead organic matter and recycle nutrients back into the ecosystem.

Symbiotic relationships, such as mutualism, commensalism, and parasitism, further illustrate the interdependence of organisms. In mutualism, both species benefit from the relationship, such as bees pollinating flowers while collecting nectar. Commensalism involves one species benefiting without affecting the other, like a barnacle living on a whale's skin. In parasitism, one species benefits at the expense of another, such as a tick feeding on a mammal's blood.

Lastly, all organisms contribute to maintaining the delicate balance within an ecosystem. They help control population levels, recycle nutrients, and maintain overall biodiversity. A disruption in one organism's population can have cascading effects on the entire ecosystem, demonstrating the importance of their interconnectedness.

In summary, all organisms are connected and need each other through their roles in ecosystems, food chains, symbiotic relationships, and their contributions to maintaining balance.

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(g) two masses mand m2(mı > m2) slide down a rough inclined surface of the same


length and inclination. which of the masses would be the first to get to the bottom? give


reasons for your answer.

Answers

The first mass with a smaller mass would reach the bottom first due to its greater acceleration and less resistance from friction.

According to Newton's second law of motion, the acceleration of an object is directly proportional to the force applied on it and inversely proportional to its mass. Therefore, the object with the smaller mass would experience a greater acceleration than the object with the larger mass. In the scenario presented in the question, both masses are sliding down the same inclined surface with the same length and inclination. However, since the first object has a smaller mass, it would experience a greater acceleration and would therefore reach the bottom first.

Moreover, since the inclined surface is described as rough, there would be friction acting against the motion of the masses, slowing them down. However, the frictional force is also directly proportional to the normal force acting on the object. The normal force is the force exerted by the surface perpendicular to the object's surface. Therefore, the larger object would experience a greater normal force and consequently a greater frictional force, further slowing it down.

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