Advertisements
Advertisements
Question
How many joules are there in one kilowatt-hour?
Advertisements
Solution
There are 3.6 × 106 J in one kilowatt-hour.
APPEARS IN
RELATED QUESTIONS
A certain household has consumed 250 units of energy during a month. How much energy is this in joules?
Select the correct alternatives
When we rub our hands
Select the correct alternatives
When a bulb lights up on passing current, the change of energy is
Answer the following in a word or two or in a sentence.
Write the formula for calculating the efficiency of a machine.
What is the common name of '1 kWh' of electrical energy?
A cell converts one form of energy into another form. Name the two forms.
- Take two aluminium channels of different lengths.
- Place the lower ends of the channels on the floor and hold their upper ends at the same height.
- Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.
- At the moment of releasing the balls, which energy do the balls have?
- As the balls roll down which energy is converted into which other form of energy?
- Why do the balls cover the same distance on rolling down?
Note: The question is wrong. It should be "Why do the balls cover the same distance after rolling down"? - What is the form of the eventual total energy of the balls?
- Which law related to energy does the above activity demonstrate? Explain.
Can you tell?
What should be taken into account for measuring work?
We make useful objects from a variety of substances. Another use of substances is that we get energy from some of them.
When we have run a long distance, we feel tired. We have to stop. Why is that?
The weight of a person on planet A is about half that on the earth. He can jump up to 0.4 m in height on the surface of the earth. How high he can jump on planet A?
