Question

A 1000watt microwave oven takes 90 seconds to heat a bowl of soup. How many joules of energy does it use?

Answer 1

Answer:

90000J

Explanation:

Given parameter:

Power of the microwave = 1000watt

time for soup to heat = 90s

Unknown:

Amount of energy delivered = ?

Solution:

Electric power is the rate at which electrical energy is transferred.

  Electrical power = $\frac{electrical energy}{time}$

 Electrical energy = electrical power x time

input the variables;

 Electrical energy = 1000 x 90 = 90000J