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Alekssandra [29.7K]
3 years ago
11

3. What is the relationship between the kinetic energy of molecules in an object and the object’s temperature? a. As the tempera

ture increases the kinetic energy of the molecules increases b. The kinetic energy always increase whether the temperature increases or decreases c. As the kinetic energy of the molecules decreases, the temperature increases d. The total kinetic energy of the molecules is not affected by a change in temperature
Physics
2 answers:
Novosadov [1.4K]3 years ago
5 0

Answer:

since temperature is the average kinetic energy of the molecules, so increasing temperature

Explanation:

evablogger [386]3 years ago
4 0

I think the answer A since temperature is the average kinetic energy of the molecules, so increasing temperature must increase kinetic energy

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A solenoid coil with 22 turns of wire is wound tightly around another coil with 340 turns. The inner solenoid is 25.0 cm long an
LUCKY_DIMON [66]

Answer:

a) 1.34*10^-8 W

b) 1.18*10^-5 H

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Explanation:

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mu_o: magnetic permeability of vacuum = 4pi*10^-7 T/A

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I: current of the inner solenoid = 0.100A

A: area of the inner solenoid = pi*r^2

r: radius of the inner solenoid = 2.00cm/2=1.00cm=10^-2m

You calculate the area and then replace the values of N, I, mu_o and A to find the magnetic flux:

A=\pi(10^{-2}m)^2=3.141510^{-4}m^2\\\Phi_B=(4\pi*10^{-7}T/A)(340)(0.100A)(3.1415*10^{-4}m^2)=1.34*10^{-8}W\\

the magnetic flux is 1.34*10^{-8}W

b) the mutual inductance is given by:

M=\mu_o N_1 N_2 \frac{A_2}{l}

N1: turns of the outer solenoid = 22

N2: turns of the inner solenoid

A_2: area of the inner solenoid

l: length of the solenoids = 25.0cm=0.25m

by replacing all these values you obtain:

M=(4\pi*10^{-7}T/A)(340)(22)\frac{3.14*10^{-4}m^2}{0.25m}=1.18*10^{-5}H

the mutual inductance is 1.18*10^{-5}H

c) the emf induced can be computed by using the mutual inductance and the change in the current of the inner solenoid:

\epsilon_1=M\frac{dI_2}{dt}

by replacing you obtain:

\epsilon_1=(1.18*10^{-5}H)(1700A/s)=0.02V=20mV

the emf is 20mV

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