Answer:
8.01 (10^-10) m
Explanation:
use the Particle in a box equation
E = (n^2) (h^2) / (8 m (L^2))
and energy of a particle as its wavelength equation
h c / lamda = E
combine the equations to get
h c / lamda = (n^2) (h^2) / (8 m (L^2))
get L alone
L^2 = (2^2 - 1^2) h lamda / 8 m c
the longest wavelength is produced by a jump from the first excited state to the ground so
n = 2 to n = 1
so
L^2 = (n1^2 - n2^2) h lamda / (8 m c)
h = 6.6(10^-34) J*s
c = 3(10^8) m/s
m = 9(10^-31) kg
lamda = 700(10^-9) m
n1 =2
n2=1
A rock with a mass of 10. 0kg falls 25. 0m to
the ground. What is the work done by the
gravitational force if the weight of the ball
is 98. 0N?
Answer:
Explanation:Potential Energy is the stored energy of an object given its position relative to a body. Gravitational potential energy is one type of potential energy and is equal to the product of the object's mass (m), the acceleration caused by gravity (g), and the object's height (h) as distance from the surface of the ground (the body).
mass m of 3 kilograms falling at gravity g of 9.81 meter per second squared from a height h of 5 meters. Solve for potential energy Pe with the equation PE equals m times g times h
In this example, a 3 kilogram mass, at a height of 5 meters, while acted on by Earth's gravity would have 147.15 Joules of potential energy, PE = 3kg * 9.81 m/s2 * 5m = 147.15 J.
9.81 meters per second squared (or more accurately 9.80665 m/s2) is widely accepted among scientists as a working average value for Earth's gravitational pull. This figure is based on a measure of gravity at sea level at a latitude of 45°.
At higher altitudes, gravity decreases slightly.
The effect of latitude on gravitational force is relevant as gravity increases with increasing distance from the Equator. At the Equator, the Earth's gravity is 9.780 m/s2 and at the poles it is 9.832 m/s2 (source: CRC Handbook of Chemistry and Physics).
Gravitational acceleration (to three significant figures) for other planets and bodies in the solar system is as follows:
m/s2 gn*
Sun 274 27.9
Mercury 3.70 0.38
Venus 8.87 0.90
Earth 9.81 1.00
Moon 1.62 0.17
Mars 3.71 0.38
Jupiter 24.9 2.54
Saturn 10.44 1.06
Uranus 8.87 0.90
Neptune 11.15 1.14
Pluto 0.58 0.06
(table source: NASA)
*Standard gravity (gn). 1.00gn is equal to 9.80665 m/s2
Using a material that is ‘Ohmic’ (it follows Ohm’s Law), you make a circuit using wire, a battery, and a resistor. After measuring V, I, and R across the circuit, you switch out the original resistor with one 3 times more resistive. When you measure V, I, and R again, how will the new values compare to the old?
When the original resistor is replaced with 3 times more resistive material, the resistance of the circuit increases by factor of 3 and the current flowing in the cirucit decreases by a factor 3.
Ohm's law
Ohm's law states that, the current flowing in a conductor is directly proportional to the potential across the conductor.
V = IR
where;
I is the current in the circuitV is voltageR is the resistanceWhen the resistance increases, the current flowing in the circuit decreases.
When the original resistor is replaced with 3 times more resistive material, the resistance of the circuit increases by factor of 3 and the current flowing in the cirucit decreases by a factor 3.
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please help me I’ll make u brainliest
A 1 liter jar contains 0.5 moles of gas at a pressure of 2 atm. What is the temperature of the gas?
What is the volume of a
container of 4 moles of gas at 200 K with a pressure of 3 atm?
Your scientist friend is trying to figure out how many molecules of gas are in a container. They know that the container has a volume of 5 liters, and they measured the pressure and temperature to be 3.5 atm and 275 K. From this information, what do you tell them the mole measurement should be?
Explanation:
A) PV = n RT
2* ( 1) = .5 (.082057)(T) T is in Kelvin
T = 48.7 K
B) PV = nRT
3 * V = 4 ( .082057)(200)
V = 21.88 Liters
C) PV = nRT
3.5 (5) = n (.082057)(275) n = .776 moles
In which substance will light move slowest?
Answer:
light travels slowest in diamond
Explanation:
The higher the index of refraction is, the slower the speed of light is. The indexes of refraction for diamond, air, and glass are, respectively, 2.42, 1.00, and approximately 1.50, depending upon the composition of the glass. Light travels slowest in diamonds.
I know this ain't right but can someone please correct the mistakes I have it for a test
Answer:
NICE HANDWRITING. I've done this before and I'm sure everything is correct. Although I would re-check to see if you had any mistakes with your calculations. Good job!
Explanation:
According to ohm’s law, which combination of units is the same as the unit for resistance? volt ÷ ampere ampere × volt volt ampere ampere ÷ volt
Answer:
Volt divided by ampere
Explanation:
V = IR
V/I = R
The unit of resistance from ohms law is volt / ampere. Thus, option A is correct.
What is Ohm's law?Ohm's law states that the applied voltage is directly proportional to the current flow in the conductor. It is written as V ∝ I. It remains constant at room temperature.
V is defined as potential difference or voltage. The SI unit of voltage is volt(V). I is defined as the current flowing in the circuit. The SI unit of current is ampere (A).
Generally, ohm's law equals to V = IR. R represents resistance of a material which oppose the current flow in the conductor. The unit of resistance is ohm(Ω).
When the potential difference(V) is constant, Resistance is inversely proportional to current. Current increases with decrease of resistance and current decreases with increase of resistance.
To find equivalent unit of resistance, the ohm's law is :
V = IR
R = V / I
= volt / ampere.
Hence, the unit of resistance from ohm's law is volt / ampere. The SI unit of resistance is ohm(Ω). Thus, option A is correct.
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What does FITT stand for?
Food, Ice cream, Teeth, Toes
Frequency, Ice cream, Time, Teeth
Food, Intensity, Toes, Type
Frequency, Intensity, Time, Type
Answer:Frequency, Intensity, Time, Type
Explanation: frequency, intensity, time, and type is one way to remember the general guidelines for what should be included in a fitness plan.
What is the moment of inertia?
How do you calculate moment of inertia for a mass on a stick?
If a stick has no mass, but it is 3 meters long, and on each end is a 2kg mass, how much inertia does the mass have it if the axis of rotation is perpendicular through the center of the stick?
https://openstax.org/books/university-physics-volume-1/pages/10-5-calculating-moments-of-inertia
the link is supposed to be used for this but im confused so please help and i gotta fill up a whole page with notes except the calculus parts
stick is like a rod
So
[tex]\\ \rm\Rrightarrow I=\dfrac{ML^2}{12}[/tex]
[tex]\\ \rm\Rrightarrow I=\dfrac{2(3)²}{12}[/tex]
[tex]\\ \rm\Rrightarrow I=\dfrac{9}{6}[/tex]
[tex]\\ \rm\Rrightarrow I=\dfrac{3}{2}[/tex]
[tex]\\ \rm\Rrightarrow I=1.5kgm^2[/tex]
0.030 m3.
The balloon is compressed at a constant temperature causing the volume
decrease to 0.025 m3.
No helium leaves the balloon.
Calculate the new pressure in the balloon
Answer:
see below
Explanation:
P1V1 = P2V2
100 000 (.03) = x ( .025) x = 120 000 pa
can someone please help me
Answer:
M a = (M1 + M2) a = F Newton's Second Law
F = (M2 - M1) g net force on the system
a = (M2 - M1) / (M1 + M2) g
a = (9 - 7) / (9 + 7) g = 2 / 16 * 10.0 m/s^2 = 1.25 m/s^2
The planets that orbit the sun are large enough that their gravity produces a
________ shape.
Answer:
a round shape. It has its own gravity to pull itself into a round shape
Hello people ~
The capacitance of a capacitor will decrease if we introduce a slab of:
(a) copper
(b) aluminium
(c) zinc
(d) None of these
Answer:
Copper
Explanation:
Capacitance is directly proportional to dielectric constant
Aluminium and zinc are highly reactive and have high dielectric contact.
Copper has less dielectric constant hence capacitance will decrease
The dimensions of the disk of our milky way galaxy are:.
Answer:
According to studies, the milky way is approximately, "170,000–200,000 light-years (52–61 kpc) in diameter and, on average, approximately 1,000 ly (0.3 kpc) thick."
With that being said, it is safe to say that the dimensions are somewhere around 100,000 by 1,000
hello people ~
64 drops each having the capacity C and potential V are combined to form a big drop. If the charge on the small drop is q, then the charge on the big drop will be
(a) 2q
(b) 4q
(c) 16q
(d) 64q
Answer:
64q
Explanation:
Note that
Charges are addaptive quantitiesHere
Capacitance C and potential V is given
We know
Q=CVSo charge is also same
Now
there are 64 drops so 64q charge
When astronauts aboard the space shuttle look down at the earth, its atmosphere appears blue. Why?.
Answer:
Reflection
Explanation:
The particles in the atmosphere only reflect the color blue and and all others are absorbed. Only the reflected colors can be seen from our eyes not the absorbed ones
an air track car with a mass off 0.25 kg and velocity of 3.4 m/s to the right collides and couples with a 0.45 kg car moving to the left with a velocity of 3.9 m/s. what is the combined velocity of the cars just after the collision?
Answer:
Two objects are moving in opposite direction on a straight line. After collision, they stick together and move with common velocity
The total momentum of a colliding system is constant always. Therefore, by using this concept, the final velocity of the coupled mass will be 3.7 m/s.
What is momentum ?Momentum of an object is the ability of an object to bring the force applied to make a maximum displacement. It is the product of its mass and velocity. Momentum is a vector quantity. It have both magnitude and direction.
The momentum in a collision is conserved. Thus total initial momentum is equal to the final momentum. Let m1 and m2 be the colliding masses and the u and v be the initial and final velocity.
Then, m1 u1 + m2u2 = (m1 + m2)v for a coupled mass after collision.
then final velocity v = ( m1 u1 + m2u2 )/ (m1 + m2)
Apply the given values in the equation as follows:
v = (0.25 kg ×3.4m/s + 0.45 kg× 3.9 m/s)) (0.45 + 0.25) = 3.7 m/s
Therefore, the final velocity of the coupled masses after collision is 3.7 m/s.
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Describe the relationship between current, voltage difference and resistance in a circuit.
Answer:
see below
Explanation:
voltage = current * resistance
Jasmine makes a note card about series circuits. she records the points shown. a 2 column table with 1 row. the column on the left is labeled advantages with entries (1) they are simple to design and build. the second column is labeled disadvantages with entries (2) each source of current used adds more current to the circuit, (3) the more bulbs are added the dimmer the bulbs are, (4) if one bulb goes out they all go out. which change will correct the error on her note card? switching the headings on the columns adding the title parallel circuits moving point (2) into the advantages column moving point (4) into the advantages column
Jasmine need to correct the error by switching the headings on the columns adding the title parallel circuits.
What is a parallel circuit?A parallel circuit is a circuit in which the components are connected to a common junction. This implies that if one bulb goes out in a parallel connection, all the bulbs will go out.
As such, Jasmine need to correct the error by switching the headings on the columns adding the title parallel circuits.
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A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called a(n) ________ type of system
A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called speed density type of system.
What is speed density fuel injection system?Speed density fuel injection system is a fuel delivery method.
This system relies on a combination of sensor and an intake air temperature sensor to measure the amount (or mass) of air entering the engine.
Thus, a fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called speed density type of system.
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It refers to the condition of the atmosphere in a place over a long period of time.
Answer:
Climate
Explanation:
conditions of the atmosphere at a particular location over a long period of time; it is the long-term summation of the atmospheric elements
Make a prediction.
Which surface causes the most friction?
a) wood b) tile c) carpet
would a sphere shaped eraser bounce
19. The frequency of orange light is 5.01 x 10^14 Hz. How much energy does a photon of orange light carry? (h = 6.626 x 10-34 J·s; 1 eV = 1.60 x 10^-19 J)
3.32 eV
5.43 eV
2.07 eV
7.56 eV
The energy a photon of the orange light carries is 3.32 eV.
What is the energy of a photon?The energy possessed by the photon incident on a surface is the energy of the photon. It is denoted by [tex]E[/tex].
Energy is related to frequency as
[tex]E=h\nu[/tex]
where h is the plank's constant, [tex]h = 6.626 \times10^{-34} \; \rm Js[/tex]
[tex]\nu=5.01\times10^{14} \:\rm Hz[/tex]
Energy will be
[tex]E= 6.626 \times10^{-34} \times\55.01\times10^{14}\\E=\333.2\times10^{-20} \rm J[/tex]
Given,
[tex]1\rm eV = 1.60 \times 10^{-19} \rm J[/tex]
Energy in eV is
[tex]E=\frac{33.2\times10^{-20}}{ 1.60 \times 10^{-19} \rm J} \\E=3.32 \rm eV[/tex]
Therefore, the energy of the photon in eV is 3.32 eV.
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Hamish is studying what happens when he sends a sound wave through different mediums, and he records his data in a table. a 2-column table with 4 rows titled hamish's waves. the first column labeled wave has entries 1, 2, 3, 4. the second column labeled information has entries liquid, solid, gas, liquid. which statement could made about the data collected in hamish’s table? wave 1 will move the fastest. wave 2 will move the slowest. wave 3 will move the slowest. wave 4 will move the fastest.
Answer:
Wave3 = slowest
Explanation:
Wave 3 will move the slowest
in liqiud and solids the molecules are closer together so the waves propogate faster than in a gas
A dragster produces a large sound as it races down the track. If the
power of this sound wave is 1,200 watts, what is the intensity of the
sound heard by the spectators who are 20 meters from the dragster?
A tourist bus is carrying passengers from the bottom of a hill to the top. the people, the bus, and the luggage can be analyzed as a single . the total amount of energy in the system as the bus travels. this situation happens because some of the kinetic energy changes to energy because of friction between the tires and the road.
The friction between the tires and the road causes loss of energy in the form of heat-energy.
What is kinetic energy?The term kinetic energy refers to the energy of an object that is in motion. The pasengers that are sitting at a point possess potential energy. If the bus stops suddenly, the potential energy of the passengers is converted to kinetic energy as they move forward.
Since friction causes loss of energy, the friction between the tires and the road causes looss of energy in the form of heat-energy.
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Why do we think that ring particles must be replenished over time? where we think ring particles come from? choose the correct statement.
Answer:
Because collisions are constantly occurring within the ring systems, ring particles are continually being ground down to dust.
Explanation:
Your house is 45.0 m from a powerline carrying 152 A of current. How much magnetic field does the current create at your house?
?×10^? T
This question involves the concepts of th magnetic field and current.
The magnetic field created by the current at the house is "6.75 x 10⁻⁷ T".
Magnetic FieldThe magnetic field created by a current carrying wire can be given by the following formula:
[tex]B=\frac{\mu_o I}{2\pi r}[/tex]
where,
B = magnetic field = ?[tex]\mu_o[/tex]= permeabiliy of free space =4π x 10⁻⁷I = current = 152 Ar = distance = 45 m[tex]B=\frac{4\pi x\ 10^{-7}(152)}{2\pi(45)}[/tex]
B = 6.75 x 10⁻⁷ T
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If you drive an oscillator, it will have the largest amplitude if you drive it at its _______ frequency.
A schema is a cluster of beliefs that allow one to process information about people, emotions, and events. please select the best answer from the choices provided t f
The statement "A schema is a cluster of beliefs that allow one to process information about people, emotions, and events." is true. This is further explained below.
What is schema?Generally, Schema is simply defined as a cluster of beliefs that allow one to process information about Humans, emotions, and events.
In conclusion, a cluster of beliefs that allow one to process information about Humans is a Schema
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Answer:
true
Explanation: