Topic 1 - Energy

Question 1

Equation for power

Answer 1

P (watts)= E(joules J)/T (seconds)

P(W) = W(work done J)/T(s)

Question 2

Energy can never be

Answer 2

Created or destroyed

Only transferred

Question 3

Equation for efficiency

Answer 3

Efficiency = useful output energy transfer / Total input energy
Efficiency =  useful power output / Total power input