Question

An electric hob uses a total of 1,500 J1,500J and produces 1,360 J1,360J of heat energy and 200 J200J of sound energy.

What type of energy is wasted?


a) Sound energy, b) Heat energy, c) 90.67%
b) Heat energy, b) Sound energy, c) 9.33%
c) Sound energy, b) Heat energy, c) 10.67%
d) Heat energy, b) Sound energy, c) 89.33%

Answer 1

The wasted energy is heat energy.

Step-by-step explanation:

The electric hob uses a total of 1,500 J of energy. It produces 1,360 J of heat energy and 200 J of sound energy. To find out what type of energy is wasted, we need to calculate the total energy used for useful purposes, which is the sum of heat energy and sound energy: 1,360 J + 200 J = 1,560 J. The wasted energy is then the difference between the total energy used and the energy used for useful purposes: 1,560 J - 1,500 J = 60 J. Therefore, the type of energy that is wasted is heat energy.