A vacuum cleaner transfers 90 000 J of energy.Calculate the power of the vacuum cleaner when used for 10 minutes.150900 000 W9 0009000 W150 W
Question
A vacuum cleaner transfers 90 000 J of energy.
Calculate the power of the vacuum cleaner when used for 10 minutes.
- 150900 000 W
- 9 000
- 9000 W
- 150 W
Solution
The power of a device is calculated by the formula:
Power = Energy / Time
Where:
- Energy is given as 90,000 J (Joules)
- Time is given as 10 minutes, but we need to convert this to seconds because the standard unit of time in this context is seconds. There are 60 seconds in a minute, so 10 minutes is 600 seconds.
So, the power is calculated as follows:
Power = 90,000 J / 600 s = 150 W (Watts)
So, the power of the vacuum cleaner is 150 Watts.
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