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ng test (8K)
Fay sets up the experiment and times how long it takes for the drawing pins to fall off. The
results are as below.
Material
Time to fall off
Iron
5 min 28s
Copper
1 min 16 s
Brass
3 min 8 s
Aluminiun
2 min 4 s.
What was the change of state that happens to the wax to allow the pins to fall *
(1 Point)

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

mass and volume are the answers you are looking for

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j