An excited hydrogen atom releases an electromagnetic wave to return to its normal state. You use your futuristic dual electric/m
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Answer:
12V
Explanation:
Given parameters:
Resistance = 12ohms
Heat released = 144J
Time taken = 12s
Unknown:
Voltage at the ends of the conductors = ?
Solution:
To solve this problem, we must first determine the power expended by the circuit.
Power is the rate at which work is done;
P =
=
= 12W
Electrical power is given as;
P = IV =
Since V is the unknown, we solve for it;
12 =
V = 12V
Explanation:
The gravitational potential energy is given by :
P = mgh
The kinetic energy of an object is given by :
As the ball reaches the bottom of the ramp, its potential energy decreases and kinetic energy increases.
It imply that, when the ball at the top most height, its gravitational potential energy is maximum and zero kinetic energy and when ball reaches the bottom of the ramp, it will have maximum kinetic energy and zero potential energy.
Answer:
Explanation:
Given:
- the voltage of the source,
- distance of separation between the capacitor plates,
- energy of the capacitor,
Assuming that there is free space between the plates, so the permittivity,
<u>We have the energy stored in a capacitor as:</u>