John weighs 725 N and is sitting at the top of the Tower of Terror, 60 m above the ground, by what factor will his gravitational potential energy change when he drops to 20 mo? A. one-third
B. 2×
c. one-half

A. one-third

Because th height is directly proportional to the potential energy. So, when its height is reduced one - third (from 60m to 20m), then its potential energy will also be reduced to one-third.

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

b - the respond is innate and varies over time.

good luck!