L5 - energy efficiency

Question 1

efficiency equation

Answer 1

efficiency(value less than 1)=useful energy total/total energy input

Question 2

efficiency ≠

Answer 2

efficiency percentage (two different questions)

Question 3

how is energy wasted most often?

Answer 3

as sound or heat

Question 4

how can you improve efficiency?

Answer 4

reducing sound and heat produced. use more efficient components in electronics or by reducing friction in things that move.