The density of sodium chloride (table salt) is 2.2 g/cm?. How much volume does 500 g of salt take up?

Answer:

The speed of sound in water at a temperature of 25°C is 1500 m/s. We can use the formula:

wavelength = speed of sound / frequency

where frequency is given as 300 Hz.

wavelength = 1500 m/s / 300 Hz

wavelength = 5 meters

Therefore, the wavelength of a 300 Hz sound wave traveling through water at a temperature of 25°C is 5 meters.

Explanation:

The potential difference between the plates of a 4.6-f capacitor that stores sufficient energy to operate a 75.0-w light bulb for one minute is  325V.

It can be determined by the equation V = E/C,

where V is the potential difference,

E is the stored energy, and C is the capacitance.

Therefore, the potential difference

V= E/C,

Substituting the values we get,

We are multiplying by the stored energy by 60 since the energy required to operate the light bulb is for one minute.

Therefore we get,

V=(75.0-w × 60s) / 4.6-f

= 325 V.

The potential difference is 325V.

To operate a 75.0-w light bulb for one minute , 325V potential difference between the plates of a 4.6-f capacitor is required.

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The work done by the spring is -(mg)2/(2ks). Therefore, the correct option is A.

The work done by the spring, Ws, is determined by the force of the spring and the displacement of the block. The spring has a stiffness constant, ks, so the force exerted by the spring is ks multiplied by the displacement, s.

The block has a mass, m, and is in the presence of acceleration due to gravity, g. The work done by the spring is therefore

Ws = -(1/2) x ks x s² = -(1/2) x ks x (mg/ks)² = -(mg)²/(2ks).

Therefore, the answer is A: -(mg)2/(2ks)

The work done by the spring can be expressed in terms of the force of the spring and the displacement of the block. The force of the spring is proportional to the stiffness constant, ks, and the displacement of the block is dependent on the mass, m, and acceleration due to gravity, g.

The work done by the spring is equal to the negative of one-half of the stiffness constant multiplied by the displacement squared. Therefore, the answer is -(mg)2/(2ks).

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The frequency of the wave is 2.66Hz.

It is given that,

Wave velocity = Vw = 4m/s

Wavelength = λ = 1.5m

Frequency = f = ?

The propagation rate The wave travels one wavelength in one period of time, or Vw, the distance it covers in a given amount of time. It is represented by the equation,

Vw = f λ

f = Vw/λ

f = (4m/s)/1.5m

f = 2.66Hz

Therefore, the frequency of the wave would be 2.66Hz.

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The final speed of the second object after the collision is 27.91 m/s.

To solve this problem, we need to use the conservation of momentum principle, Before the collision, the total momentum of the system is:

[tex]P = m1v1 + m2v2\\\P = (4.71 kg)(27.2 m/s) + (7.86 kg)(13.7 m/s)\\\P = 236.56 kgm/s + 107.82 kgm/s\\\P = 344.38 kg*m/s[/tex]

After the collision, the two objects stick together and move with a common velocity, which we will call v. Therefore, the total momentum of the system after the collision is:

[tex]P' = (m1 + m2)*v\\\\\P' = (4.71 kg + 7.86 kg)v\\\P' = 12.57 kgv[/tex]

Since the total momentum of the system is conserved, we can equate the two expressions for the momentum:

[tex]P = P'\\\236.56 kgm/s + 107.82 kgm/s = 12.57 kgv\\\\\v = (236.56 kgm/s + 107.82 kg*m/s) / 12.57 kg\\\\\v = 27.91 m/s[/tex]

Therefore, the final speed of the second object after the collision is 27.91 m/s.

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Answer:

Explanation:

We can break down the velocity of the boat into its components using trigonometry.

Let's call the velocity of the boat "v" and let the angle between the boat's velocity vector and the westward direction be represented by θ, where θ = 20.0°.

The x-component of the velocity can be found using cosine:

vx = v * cos(θ)

vx = 45 mph * cos(20.0°)

vx = 42.58 mph (rounded to two decimal places)

The y-component of the velocity can be found using sine:

vy = v * sin(θ)

vy = 45 mph * sin(20.0°)

vy = 15.34 mph (rounded to two decimal places)

Therefore, the components of the boat's velocity are vx = 42.58 mph west and vy = 15.34 mph south.

Answer:

It would be 2850 kg m/s

Explanation:

Considering the Boyle's Law,  the volume of he gas at 2 atm is 12 L.

Boyle's Law establishes the relationship between the pressure and volume of a gas when the temperature is constant.

Boyle's Law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container.

Mathematically, this law is established as:

P×V= k

where

Considering an initial state 1 and a final state 2, it is fulfilled:

P₁×V₁= P₂×V₂

In this case, you know:

Replacing in definition of Boyle's law:

6 atm× 4 L= 2 atm× V₂

Solving:

(6 atm× 4 L)÷ 2 atm= V₂

(6 atm× 4 L)÷ 2 atm= V₂

12 L= V₂

Finally, the volume is 12 L.

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The ratio of the area of the cylinder that is being controlled to the area of the master cylinder must be 100:1. This is because, in a hydraulic system, the force is proportional to the area of the cylinder.

The hydraulic system works on the principle of Pascal's Law. Pascal's Law states that if there is an increase in pressure at any point in an enclosed fluid, there will be an equal increase in pressure at every other point in the container. Let's discuss the working of the hydraulic system with the help of the below diagram.

We have given that the force exerted by the system is 100 times greater than the one put into it. So we can say that the output pressure is 100 times the input pressure.

So,

Output pressure/Input pressure = 100/1

This pressure is the force per unit area, so it is also the ratio of the areas of the cylinders. We can write it as,

A₂/A₁ = 100/1

A₂ = 100*A₁

Therefore, the area of the cylinder being controlled (A₂) is 100 times the area of the master cylinder (A₁)

Hence, the required ratio of the area is 100:1.

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The mass of the second railroad car, rounded to the nearest whole number, given that the car was initially at rest is 5884 Kg

The following data were obtained from the question:

The mass of second railroad car  be obtained as illustrated below:

Momentum before = momentum after

m₁u₁ + m₂u₂ = v(m₁ + m₂)

(4500 × 3) + (m₂ × 0) = 1.3 × (4500 + m₂)

13500 + 0 = 5850 + 1.3m₂

13500 = 5850 + 1.3m₂

Collect like terms

13500 - 5850 = 1.3m₂

7650 = 1.3m₂

Divide both sides by 1.3

m₂ = 7650 / 1.3

m₂ = 5884 Kg

Thus, the mass of the second railroad car is 5884 Kg

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If the winner started the acceleration first, he will be 31.24 m ahead of the loser when the loser finishes.

Let the winner's initial position be at x = 0. Assume that the loser is a distance d away from the winner's initial position. Therefore, the loser's initial position is at x = -d.The winner starts to accelerate when the other racer is 6.5 m ahead of him. When the winner reaches a speed of 12.2 m/s, the other racer has traveled a distance of 6.5 m.

The time it takes the winner to catch up to the other racer can be found using the equation:

x = vt + 1/2at^2

where x = 6.5 m, v = 12.2 m/s, and a = 0.

The time t is: 6.5 m = 12.2 m/s × t

Thus, t = 0.533 s.

From that time on, the winner continues to cycle at a constant speed of 12.2 m/s until the finish line. The distance the winner travels between catching up to the other racer and crossing the finish line is: Distance traveled by the winner = 12.2 m/s × (18.3 s – 0.533 s) = 224.43 m. Distance between the winner and the other racer after crossing the finish line is: 12.2 m/s × (18.3 s – 15.0 s) = 40.26 m.

Hence, the distance between the loser and the finish line is (65.0 m – 40.26 m) = 24.74 m. Distance the winner will travel before the loser finishes: 24.74 m + 6.5 m = 31.24 m.

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An acrobat with a mass of 49-kg jumping on a trampoline, the force that the trampoline has to apply to accelerate her straight up at [tex]7.9m/s^2[/tex] in newtons is 867.3 N.

How to calculate force? Force is the product of mass and acceleration.

Hence, F = ma

Where, F = Net force applied

            m = mass of an object

            a = net acceleration

Force can be calculated by multiplying the mass of the object with the acceleration experienced by it.

In this case, m = 49kg and a = [tex]7.9 m/s^2[/tex]

Force applied by earth gravity on the acrobat is mg, which equals 49*9.8 N i.e., 480.2 N.

[tex]F - F_{gravity}=ma \\F-F_{gravity} = ma\\F = F_{gravity}+ma\\F=480.2+49*7.9 N \\F=867.3 N\\[/tex]

So, F= 867.3 N is required.

Therefore, the trampoline has to apply a force of 867.3 N to accelerate the acrobat straight up at [tex]7.9 m/s^2[/tex].

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The size of the image is 20 times smaller than the size of the car, and the image is located 120 cm behind the mirror.

Length is a measure of the magnitude of a line segment, straight or curved, between two points in space. It is a fundamental physical quantity in many fields of mathematics, physics, and engineering. Length is usually measured in units of distance such as inches, feet, meters, and kilometers. Length is an important concept in geometry, which is the study of shapes and their properties. In geometry, length is used to describe the size of lines, angles, and other shapes. Length can also be used to measure the size and distance between two points in space.

The size and location of the image of the car in the trucker’s diverging rear view mirror is determined by the focal length of the mirror. The focal length of the mirror is -60 cm. Using the thin lens equation, the image distance can be calculated as:

1/f = 1/di + 1/do

1/-60 = 1/di + 1/6

di = -120 cm

The height of the image can be calculated using the magnification formula:

m = -di/do

m = -120/6

m = -20

Therefore, the size of the image is 20 times smaller than the size of the car, and the image is located 120 cm behind the mirror.

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Answer:

pls mrk me brainliest

Explanation:

Hydrostatic pressure is the pressure exerted by a fluid at equilibrium at any point of time due to the force of gravity. Hydrostatic pressure is proportional to the depth measured from the surface as the weight of the fluid increases when a downward force is applied. The hydrostatic pressure at any point in a fluid can be calculated by using the formula:

P = P0 + ρgh

where P is the hydrostatic pressure, P0 is the atmospheric pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the depth of the point from the surface.

a) In which fluid is pressure of 610 kPa first achieved?

It can be found out by adding up the hydrostatic pressures of each layer of fluid until we reach 610 kPa. Starting from gas layer:

Pgas = 60 kPa + (1 kg/m3)(9.81 m/s2)(1 m) = 60.00981 kPa

Palcohol = Pgas + (780 kg/m3)(9.81 m/s2)(60 m) = 460.00981 kPa

Poil = Palcohol + (840 kg/m3)(9.81 m/s2)(10 m) = 542.40981 kPa

Pwater = Poil + (990 kg/m3)(9.81 m/s2)(2 m) = 561.60981 kPa

Pglycerine = Pwater + (1236 kg/m3)(9.81 m/s2)(3 m) = 605.46981 kPa

Pmolasses = Pglycerine + (1500 kg/m3)(9.81 m/s2)(10 m) = 752.96981 kPa

The pressure of 610 kPa is first achieved in glycerine layer.

b) If the bottom of the pipe is at zero elevation what is

b) If the bottom of the pipe is at zero elevation what isthe pressure at bottom in kpa?

The bottom of pipe corresponds to molasses layer so use it to calculate hydrostatic pressure as calculated above:

Pbottom = Pmolasses = 752.96981 kPa

c) At what elevation is pressure of 640kpa?

It can be found out by subtracting hydrostatic pressures from each layer until it reach below 640kpa and then use interpolation to find exact elevation.

Starting from molasses layer:

Pmolasses - Pglycerine= (752.96981 - 605.46981)kpa=147.5kpa

This means that somewhere between glycerine and molasses layers there is a point with pressure of 640kpa.

Let x be distance from top surface of molasses layer to this point then:

640kpa=605.4698+1500(9.8)x

x=0.023m

Therefore elevation from bottom surface of pipe to this point is:

10-0-0-023=9-977m

d) If an open manometer attached to side pipe anywhere on oily portion determine height liquid level manometer.

An open manometer measures difference between atmospheric pressure and fluid pressure inside pipe.

Let y be height liquid level manometer above oil level then:

Patm-Poil=yρg

y=(Poil-Patm)/ρg

y=(542-4098-101325)/(1000*9-8)

y=-44-6m

This means that liquid level manometer will be below oil level by -44-6m or oil level will be above liquid level manometer by +44-6m.

A carbon resistor is to be used as a thermometer. On a winter day when the temperature is 4.0 ∘C, the resistance of the carbon resistor is 217.1 Ω

To find the temperature on a spring day when the resistance is 215.1 Ω,

1. Use the given information: initial temperature (T0) is 4.0°C, initial resistance (R0) is 217.1Ω, and final resistance (R) is 215.1Ω.

2. Use the temperature coefficient of resistance (α) for carbon. For carbon, α is typically around 0.0005 per degree Celsius (°C).

3. Apply the formula to relate resistance, temperature, and temperature coefficient:
  R = R0 * (1 + α * (T - T0))

4. Solve for the final temperature (T):
  215.1 = 217.1 * (1 + 0.0005 * (T - 4.0))

5. Rearrange the equation and solve for T:
  (215.1 / 217.1) = 1 + 0.0005 * (T - 4.0)
  0.9908 = 1 + 0.0005 * (T - 4.0)
  -0.0092 = 0.0005 * (T - 4.0)
  T - 4.0 = -0.0092 / 0.0005
  T - 4.0 = -18.4
  T = -14.4°C

So, the temperature on a spring day when the resistance is 215.1 Ω is -14.4°C.

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At the theoretical temperature of 0 K (also known as absolute zero), the substance's particles would stop moving.

This is because temperature is a measure of the average kinetic energy of the particles in a substance, and at 0 K, there is no thermal energy left to sustain motion.

At this temperature, all molecular motion and vibration would cease, and the substance would have the lowest possible energy state. This is the coldest temperature possible, and no substance can be cooled to exactly 0 K, although temperatures very close to absolute zero can be achieved in laboratory settings using cryogenic cooling techniques.

Therefore, the correct answer is: The substance's particles would stop moving.

What is kinetic energy?

Kinetic energy is the energy that an object possesses due to its motion. It is a form of energy that an object has because of its speed and mass. The formula for kinetic energy is:

KE = 1/2 * m * v^2

where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.

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When you place a thumbtack 54.0 cm in front of a lens, the resulting image is real, inverted, and the same size as the thumbtack, then the lens in this case is a converging lens.

Converging lenses are thick in the middle and thin at the edges. They are convex in shape, which means they bulge outwards. Converging lenses can converge light rays to a point on the other side of the lens. They are also known as convex lenses, and they have a positive focal length.

The image produced by a converging lens can be real or virtual depending on the position of the object relative to the lens. The image of the object is real when the object is placed beyond the focal point of the lens, as in this situation.

Therefore, when you place a thumbtack in front of a lens, the resulting image is real, inverted, and the same size as the thumbtack. that means the lens is a converging lens.

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transverse : light

longitudinal : sound

transverse : up & down

longitudinal : left & right or side to side

transverse : perpendicular

longitudinal : parallel

transverse : up & down ocean wave

longitudinal : archer pulling back on a bowstring then letting go releasing the string

v = λf : speed of a wave is measured in meters per second (m/s), the wavelength is measured in meters (m), and the frequency is measured in hertz (Hz)

ANSWER:

A transverse wave has the displacement perpendicular (i.e., at right angles) to the direction of wave propagation. An example of a transverse wave is the wave on a string, where the displacement of the string is perpendicular to the direction in which the wave travels.

A longitudinal wave (also known as a compression wave or pressure wave) has the displacement parallel to the direction of wave propagation. An example of a longitudinal wave is sound waves, where the particles of the medium vibrate parallel to the direction of the wave as the wave travels through the medium.

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Transverse waves:

The displacement of the wave is perpendicular to the direction of wave propagation.

Example: A wave on a string, where the string moves up and down while the wave moves left and right.

Simple analogy: Imagine shaking a jump rope up and down while holding it horizontally - the wave travels horizontally while the rope moves up and down.

Longitudinal waves:

The displacement of the wave is parallel to the direction of wave propagation.

Example: Sound waves, where air molecules move back and forth in the same direction as the wave.

Simple analogy: Imagine squeezing a slinky in a direction parallel to the slinky - the wave travels in that same direction while the slinky compresses and expands.

Formula used: There is no specific formula for describing the direction of wave displacement, as it depends on the type of wave. However, the speed of a wave can be calculated using the formula v = λf, where v is the speed of the wave, λ (lambda) is the wavelength, and f is the frequency.

Real-world example: Light waves are transverse waves, with the electric and magnetic fields perpendicular to the direction of propagation. This can be seen in polarization filters, which only allow light waves with a certain orientation of electric field to pass through.

Real-world example of longitudinal waves

An example of longitudinal waves in the real world is sound waves, which are pressure waves that propagate through a medium such as air, water, or solids. Sound waves are longitudinal waves because the vibrations of air molecules or particles in a medium are parallel to the direction of the wave's propagation. Examples of sound waves in daily life include the sound of a car engine, a musical instrument, or a person speaking.

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An advantage of conducting a true experiment in the laboratory (as opposed to conducting a true experiment in the field) is that in the laboratory, it is somewhat easier to: control the variables.

Conducting a true experiment in the laboratory, as opposed to conducting one in the field, has the advantage that it is somewhat easier to control the variables. In the laboratory, all factors influencing the experiment can be easily manipulated and monitored, ensuring that the experiment is conducted accurately and reliably.

This includes factors such as temperature, humidity, light levels, and other environmental factors. Additionally, laboratory equipment can be used to measure variables that cannot be monitored in the field. For example, with the help of a microscope, minute changes in the structure of a plant can be observed and measured.

In summary, conducting a true experiment in the laboratory provides the researcher with greater control over the environment and measurement of variables, making it a much more accurate and reliable method than conducting an experiment in the field.

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The value of its kinetic energy when it reaches its ending point is 128 J.

The electric potential energy of a charge is given by the formula,

PE = qV

where,

PE is the potential energy of the charge, q is the charge, and V is the electric potential.

If the charge is allowed to move from a position of potential V₁ to a position of potential V₂, the change in potential energy can be expressed as follows:

ΔPE = q(V₂ - V₁)

The kinetic energy of a charge can also be determined from the electric potential energy that has been released to the charge as it travels through the electric field. That is,

KE = ΔPE = q(V₁ - V₂)

Thus, the value of its kinetic energy when it reaches its ending point,

KE = q(V₁ - V₂)

KE = 8 C(33 V - 17 V)

KE = 128 J

So, the value of its kinetic energy is 128 joules.

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Answer:

We dont see a pattern of light and dark fringes on a wall that is illuminated by two ordinary light bulbs beca.

The required work done in stretching the spring from 15 cm to 20 cm is calculated to be 11.2 j.

The original length of the spring is given as 10 cm.

The work done to stretch the spring to 15 cm is 8 j.

Let us find out the value of k spring constant.

W = 1/2 k x²

where,

W is work

k is spring constant

x is elongation of spring

Putting in the values,

8 = 1/2 k (15² - 10²)

8 = 1/2 k (225 - 100)

8 = 1/2 k(125)

k = 8×2/125 = 0.128

Now, let us calculate the work done in stretching the spring from 15 cm to 20 cm.

W = 1/2 k x² = 1/2 (0.128) [(20² - 10²)-(15² - 10²)] = 0.064 [300-125] = 11.2 j

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The process of determining the size of hailstones involves the following steps:

1. Observe the hailstones.

2. Measure the longest dimension.

3. Compare to a common object.

4. Document the hailstone.
5. Report the size.

1. Observe the hailstones: When it is safe to do so, weather spotters should collect the largest hailstone they can find.
2. Measure the longest dimension: Use a ruler or measuring tape to measure the longest dimension of the largest hailstone.

This is the size that weather spotters should report.
3. Compare to a common object: For easier communication, it's helpful to compare the hailstone size to a common object, such as a coin, golf ball, or baseball.
4. Document the hailstone: Take a photograph of the hailstone next to the measuring device or common object for reference.

5. Report the size: Weather spotters should report the longest dimension of the largest hailstone to their local weather agency or storm spotting network.
Remember, always prioritize safety when observing and measuring hailstones.

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The direction of the force of static friction on an incline is perpendicular to the surface, while on a flat surface, it is parallel to the surface. This is because the incline introduces a component of the gravitational force that acts perpendicular to the surface.

On a flat surface, the force of static friction is parallel to the surface and opposite in direction to the applied force. However, on an incline, the component of gravitational force perpendicular to the surface creates a normal force that is also perpendicular to the surface. The force of static friction acts perpendicular to both the normal force and the inclined surface since it's always perpendicular to the normal force. This change in direction occurs because the force of static friction is a reactionary force that opposes the motion, and its direction depends on the forces acting on the object. Therefore, the direction of the force of static friction changes based on the orientation of the surface on which the object is placed.

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Answer:

Approximately [tex]15.5\; {\rm N}[/tex], assuming that [tex]g = 9.81\; {\rm N \cdot kg^{-1}}[/tex].

Explanation:

To find the tension in the rope on the right side of the pulley, apply the following steps:

The net force on the block is:

[tex]F_{\text{net}} = m_{\text{b}} \, a[/tex], where

At the same time, the net force on the block can also be expressed as:

[tex]\begin{aligned}F_{\text{net}} &= T_{\text{left}} - (\text{weight}) \\ &= T_{\text{left}} - m_{\text{b}}\, g \end{aligned}[/tex], where

Rearrange and solve for [tex]T_{\text{left}}[/tex]:

[tex]T_{\text{left}} - m_{\text{b}}\, g = F_{\text{net}} = m_{\text{b}}\, a[/tex].

[tex]\begin{aligned}T_{\text{left}} &= m_{\text{b}}\, a + m_{\text{b}}\, g \\ &= m_{\text{b}}\, (a + g) \\ &= 1.3\, (1.2 + 9.81)\; {\rm N} \\ &= 14.313\; {\rm N}\end{aligned}[/tex].

Let [tex]r[/tex] denote the radius of the pulley. It is given that the diameter of the pulley is [tex]50\; {\rm cm}[/tex]. In standard units, the radius of the pulley would be [tex]r = 25\; {\rm cm} = 0.25\; {\rm m}[/tex].

On the left side of the pulley, tension in the rope exerts a torque of [tex]\tau_{\text{left}} = T_{\text{left}}\, r[/tex] on the pulley:

[tex]\begin{aligned}\tau_{\text{left}} &= T_{\text{left}}\, r \\ &= (14.313)\, (0.25)\; {\rm N\cdot m} \\ &= 3.57825\; {\rm N\cdot m} \end{aligned}[/tex].

Under the assumptions, the moment of inertia [tex]I[/tex] of this cylindrical pulley would be:

[tex]\begin{aligned} I &= \frac{1}{2}\, m\, r^{2} \end{aligned}[/tex], where

[tex]\begin{aligned} I &= \frac{1}{2}\, m\, r^{2} \\ &= \frac{1}{2}\, (2.0)\, (0.25)^{2}\; {\rm kg \cdot m^{2}} \\ &= 0.0625\; {\rm kg\cdot m^{2}} \end{aligned}[/tex].

Since the rope doesn't slip on the pulley, linear acceleration of the pulley would be equal to that of the rope, [tex]a = 1.2\; {\rm m\cdot s^{-2}}[/tex]. Divide this linear acceleration by the radius of the pulley to find the angular acceleration [tex]\alpha[/tex] of the pulley:

[tex]\begin{aligned}\alpha &= \frac{a}{r} \\ &= \frac{1.2}{0.25}\; {\rm s^{-2}} \\ &= 4.8\; {\rm s^{-2}}\end{aligned}[/tex].

Multiply angular acceleration by the moment of inertia to find the net torque [tex]\tau_{\text{net}}[/tex] on the pulley cylinder:

[tex]\begin{aligned}\tau_{\text{net}} &= I\, \alpha \\ &= (0.0625)\, (4.8)\; {\rm kg \cdot m^{2}\cdot s^{-2}}\\ &= 0.3\; {\rm kg \cdot m^{2} \cdot s^{-2}} \end{aligned}[/tex].

Note that the net torque of the pulley [tex]\tau_{\text{net}}[/tex] is in the same direction as [tex]\tau_{\text{right}}[/tex], but the opposite of [tex]\tau_{\text{left}}[/tex]. Hence:

[tex]\begin{aligned}\tau_{\text{right}} &= \tau_{\text{net}} + \tau_{\text{left}} \\ &= 0.3\; {\rm N\cdot m} + 3.57825\; {\rm N\cdot m} \\ &= 3.87825\; {\rm N\cdot m}\end{aligned}[/tex].

Divide the torque on the right [tex]\tau_{\text{right}}[/tex] by radius [tex]r[/tex] to find the tension in the string on the right [tex]T_{\text{right}}[/tex]:

[tex]\begin{aligned}T_{\text{right}} &= \frac{\tau_{\text{right}}}{r} \\ &= \frac{3.87825}{0.25}\; {\rm N} \\ &= 15.513\; {\rm N}\end{aligned}[/tex].

When the magnitude of the electric field in an EM wave is doubled, the intensity of the wave increases by a factor of 4. The correct option is c. It quadruples.

The intensity (I) of an electromagnetic wave is given by:

I = (1/2)ε0cE^2

where ε0 is the electric constant, c is the speed of light, and E is the magnitude of the electric field.

If the magnitude of the electric field in an electromagnetic wave is doubled, the intensity of the wave will increase by a factor of four (4), because:

I' = (1/2)ε0c(2E)^2 = 4(1/2)ε0cE^2 = 4I

The correct answer is (c) It quadruples.

Electromagnetic waves are waves that are produced by oscillating electric and magnetic fields. An electromagnetic wave is composed of electric and magnetic fields that oscillate perpendicularly to each other and to the direction of wave propagation. Light, microwaves, X-rays, and radio waves are all examples of electromagnetic waves.

The power transferred per unit area by an electromagnetic wave is known as the intensity of the wave. The magnitude of the electric field in an EM wave is related to its intensity. When the magnitude of the electric field in an EM wave is doubled, the intensity of the wave quadruples.

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a. Distance from q₃ to q₁ = 23.0 cm

b. the magnitude and the direction of the force F₁₃ exerted by q₁ on  q₃ -3.00 x 10⁻³ N.

c. The magnitude and the direction of the force F23 exerted by q2 on q3 = -3.00 x 10⁻³ N

d. The magnitude and the direction of the force F₂₃ exerted by q₂ on q₁ = -7.5 x 10⁻⁵ N

To find the distance from q₃ to q₁ and from q₃ to q₂, we can use the Pythagorean theorem. The distance from q₃ to q₁ is the hypotenuse of a right triangle with legs of 12.0 cm (the distance from q₃ to the origin on the y-axis) and 16.0 cm + 4.00 cm = 20.0 cm (the distance from q₁ to the origin on the x-axis). Thus:

distance from q₃ to q₁ = √(12.0 cm² + 20.0 cm²) = 23.0 cm

Similarly, the distance from q₃ to q₂ is the hypotenuse of a right triangle with legs of 12.0 cm (the distance from q₃ to the origin on the y-axis) and 16.0 cm - 4.00 cm = 12.0 cm (the distance from q₂ to the origin on the x-axis). Thus:

distance from q₃ to q₂ = √(12.0 cm² + 12.0 cm²) = 16.97 cm (to two significant figures)

How to find the magnitude and the direction of the force F₁₃ exerted by q₁ on q₃?

To find the magnitude of the force F₁₃ exerted by q₁ on q₃, we can use Coulomb's law:

F₁₃ = k * q₁ * q₃/ r₁₃²

where k = 9 x 10⁹ Nm²/C² is the Coulomb constant, q₁ and q₃ are the charges in coulombs, and r₁₃ is the distance between the charges in meters. In this case, q₁ = q₃ = 4.00 μC = 4.00 x 10⁻⁶ C and r₁₃ = 12.0 cm = 0.12 m. Thus:

F₁₃ = (9 x 10⁹ Nm²/C²) * (4.00 x 10⁻⁶ C) * (-1.00 x 10⁻⁶ C) / (0.12 m)²

= -3.00 x 10⁻³ N

The negative sign indicates that the force is attractive, since q₁ and q₃ have opposite signs.

c. q₂ = q₁, so The magnitude and the direction of the force F₂₃ exerted by q₂ on q₃ = -3.00 x 10⁻³ N

d. q₃ = 1/4q₂, so -3.00 x 10⁻³/4 N

= −0.00075 = -7.5 x 10⁻⁵

The magnitude and the direction of the force F₂₃ exerted by q₂ on q₁ = -7.5 x 10⁻⁵ N

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The bolts on the cylinder head of certain engines require tightening to a torque of 90 nm. The force perpendicular to the wrench that the mechanic must exert at its end is 450 N.

Torque is a measure of how much a force acting on an object causes the object to rotate. One component of torque is force, the other is distance. If the distance between the point where the force is applied and the point where the object rotates is shorter, a higher torque can be produced using less force.The torque formula is given by τ = r × F, where τ is the torque, r is the lever arm, and F is the force.

The formula for torque is as follows:

Torque = Force x Distance perpendicular to the applied force

Where:

Distance perpendicular to the applied force is the distance between the applied force and the pivot point.

Given that:

To convert cm to m, divide by 100. So, the distance perpendicular to the applied force is 0.2 m.

Thus, the force perpendicular to the wrench that the mechanic must exert at its end is 450 N.

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Answer: False

Explanation: It will move at a constant speed

Answer:

no

Explanation:

because when he jumps into the swimming pool he will not be able to swim comfortably