Knowee
Questions
Features
Study Tools

A dishwasher takes 0.75 hours to wash one load.During this time, it uses 4.86 MJ of energy.Calculate the power of this dishwasher.Give your answer in watts.

Question

A dishwasher takes 0.75 hours to wash one load.

During this time, it uses 4.86 MJ of energy.

Calculate the power of this dishwasher.

Give your answer in watts.

🧐 Not the exact question you are looking for?Go ask a question

Solution

To calculate the power of the dishwasher, 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 0.75 hours = 0.75 * 60 * 60 = 2700 seconds

So, the energy used by the dishwasher is 4.86 MJ = 4.86 * 1,000,000 = 4,860,000 Joules

Now we can substitute these values into the formula:

Power = 4,860,000 J / 2700 s = 1800 Watts

So, the power of the dishwasher is 1800 Watts.

This problem has been solved

Similar Questions

An oven is turned on and used for 2700 seconds.During that time, it transfers 5.13MJ of energy.Calculate the power of this oven.

A vacuum cleaner transfers 72 000 J of energy.Calculate the power of the vacuum cleaner when used for 6 minutes.432 000 W12 000 W200 W20012 000

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

16. Calculate the time it takes a 0.5 kW appliance to transfer 1.3 kJ of energy (1dp)

10. Calculate the power of an appliance that transfers 1000 J of energy in 45 s (2dp)

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.