Question

If you lift a 10 kg bag of rice 1 m up onto a pantry shelf, and you are 10% efficient in converting energy to work, how much energy have you lost to heat?

a) 100 J

b) 90 J

c) 900 J

d) 10 J

e) 1000 J​

Answer 1

Answer:

The right answer is 10J...