It takes 56.5 kilojoules of energy to raise the temperature of 150 milliliters of water from 5°c to 95°c. if you
use an electric water heater that is 60% efficient, how many kilojoules of electrical energy will the heater
actually use by the time the water reaches its final temperature?

we know that

Power efficiency is defined as the ratio of the output power divided by the input power:

so

in this problem

%

Substitute in the formula above

therefore

the answer is

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

it is a negative acceleration