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प्रश्न
How many joules are there in one kilowatt-hour?
How many joules are equal to 1 kW h?
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उत्तर
There are 3.6 × 106 J in one kilowatt-hour.
संबंधित प्रश्न
Match the following columns
| COLUMN A | COLUMN B |
| 1. Running water | 1. heat energy |
| 2. Burning | 2. vibrations |
| 3.Energy | 3.atom bomb |
| 4.Sound energy | 4.kinetic energy |
| 5.Nuclear energy | 5.joule |
Select the correct alternatives
The correct statement is
What is potential energy ? State its unit.
State two factors on which the potential energy of a body at a certain height above the ground depends.
What do you mean by conservation of mechanical energy? State the condition when does it hold.
Tick the most appropriate answer.
The force applied on a machine to do work is called the
Answer the following in a word or two or in a sentence.
Write the formula for calculating the efficiency of a machine.
Answer the following in short.
What do you understand by the term efficiency of a machine’?
Give a reason for the following.
The efficiency of a machine is always less than 100%.
Name the commercial unit of measurement of energy.
Name two units of power bigger than watt.
Define the term 'watt'.
Name the quantity whose unit is :
(a) kilowatt
(b) kilowatt-hour
The commercial unit of energy is :
The capacity that an object has for doing work is called ______.
Can you tell?
When can we say that displacement has taken place?
We make useful objects from a variety of substances. Another use of substances is that we get energy from some of them.
There is a car. Its tank is full of fuel but it does not move. Why is that?
Find out the form of energy possessed by the following thing.
A rock on the top of a hill
A ball is dropped from a height of 10 m. If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back? (g = 10 m s–2)
