Answer:
1/2
Explanation:
The energy stored in a capacitor is given by:
where
C is the capacitance
V is the potential difference
For capacitor 1, we have
Capacitor 2 has
(half the capacitance of capacitor 1)
(twice the potential difference of capacitor 1)
So the energy of capacitor 2 is
So, the ratio between the two energies is
Given is the velocity of the bus at 25 meters per second. Then it decelerates steadily. It stops after 40 seconds. To calculate for the acceleration, use this formula:
a = (vf - vo) / t
vf = 0 m/s (complete stop)
vo = 25 m/s
t = 40 s
Therefore,
a = (0 - 25) m/s / 40 s
a = - 0.625 m/s^2
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screwdriver :)
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The difference between a fuse and a circuit breaker is that a fuse is a one time circuit element while a circuit breaker is a multiple use device. If you were designing a circuit for a reading lamp, you should include a circuit breaker so you don't have to replace it every time.
