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प्रश्न
Name the commercial unit of measurement of energy.
उत्तर
Kilowatt- hour (kWh) is the commercial unit of measurement of energy.
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संबंधित प्रश्न
Fill in the blank
The ability to do work is called ______
Match the following:
| Column A | Column B |
| (a) Needle | (1) class II lever |
| (b) Doorknob | (2) inclined plane |
| (c) Ramp | (3) Class I lever |
| (d) Lemon crusher | (4) Wheel and axle |
| (e) Seesaw | (5) wedge |
Define the term efficiency of a machine.
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?
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?
Observe the picture and put a tick (✓) if work is done and put a cross (x) if work is not done.
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Which one of the following is not the unit of energy?
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?
