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प्रश्न
Tick the most appropriate answer.
The force applied on a machine to do work is called the
पर्याय
load
effort
efficiency
fulcrum
उत्तर
effort
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संबंधित प्रश्न
A certain household has consumed 250 units of energy during a month. How much energy is this in joules?
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 |
State two factors on which the potential energy of a body at a certain height above the ground depends.
Answer the following in a word or two or in a sentence.
Write the formula for calculating the efficiency of a machine.
Give a reason for the following.
The efficiency of a machine is always less than 100%.
Define the term 'watt'.
What is the common name of '1 kWh' of electrical energy?
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?
Running water possesses ______.
Define kilowatt hour.
