A washing machine takes 2 hours to wash one load of clothes.During this time, it uses 8.64 MJ of energy.Calculate the power of this washing machine.Give your answer in watts.0.0012 W4.32 W4 320 000 W1200 W
Question
A washing machine takes 2 hours to wash one load of clothes.During this time, it uses 8.64 MJ of energy.Calculate the power of this washing machine.Give your answer in watts.0.0012 W4.32 W4 320 000 W1200 W
Solution
To calculate the power of the washing machine, we need to use the formula for power which is:
Power = Energy / Time
The energy is given in MegaJoules (MJ) and the time is given in hours. However, we need to convert these units to Joules (J) and seconds (s) respectively, because the standard unit of power (Watt) is derived from Joules and seconds.
1 MJ = 1,000,000 Joules 1 hour = 3600 seconds
So, the energy used by the washing machine is 8.64 MJ which is equal to 8.64 * 1,000,000 = 8,640,000 Joules.
The time taken by the washing machine is 2 hours which is equal to 2 * 3600 = 7200 seconds.
Now, we can calculate the power:
Power = 8,640,000 J / 7200 s = 1200 Watts.
So, the power of the washing machine is 1200 Watts.
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