Q. The prefixes are useful to express

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Q. A worldwide system of measurements in which the units of base quantities were introduced is called

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Q. The quantities that are expressed in terms of base quantities are known as

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Q. Volume, area, speed, electric charge, force and work are the examples of

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Q. The quantities on the basis of which other quantities are expressed are called

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Q. A quantity that can be measured is known as

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Q. If an athlete covered a distance of 100 m with a time of 9.48 s, then the average speed would be

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Q. Physical quantity consists of

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Q. A machine has the ability to lift blocks vertically up to a height of 30 m above the ground in 50 s. The power of the machine is

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Q. The SI unit of power is

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Q. A filament bulb rated at 30 W, coverts 15% of its electrical energy supply into light energy. Calculate the quantity of light energy emitted in 10 minutes.

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Q. One watt is given by

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Q. A hurricane possesses a tremendous amount of

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Q. The rate of work done or rate of energy conversion of one joule per second is known as

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Q. If P is the power, W is the work done, E is the energy converted and t is the time taken then, P is defined as

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Q. The rate of work done or rate of energy conversion is known as

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Q. In stairs, each step has a height of 0.25 m and there are 8 steps altogether. If a boy runs up the flight of steps in 4 s and his weight is 390 N, what is his body's power?

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Q. Due to the gas molecules bombarding the walls of the container, the gases can exert

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Q. When a gas is heated and its temperature rises, causing the gas molecules to move at

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Q. The pressure of a fixed mass of gas p is directly proportional to the

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