Advertisements
Advertisements
प्रश्न
Name the quantity whose unit is :
(a) kilowatt
(b) kilowatt-hour
Advertisements
उत्तर
(a) Power is the quantity whose unit is kilowatt (kW).
(b) Energy is the quantity whose unit is kilowatt- hour (kWh).
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
A gum bottle lying on a table has no energy.
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 do you mean by conservation of mechanical energy? State the condition when does it hold.
Give a reason for the following.
The efficiency of a machine is always less than 100%.
Name two units of power bigger than watt.
Define the term 'watt'.
A certain household consumes 650 units of electricity in a month. How much is this electricity in joules?
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?
