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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Q. In symbols, where k is the constant, p is the pressure and V is the volume of gas, we can express the pressure of gas as

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Q. In general, pressure of a fixed mass of gas p is inversely proportional to the

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Q. A rectangular block with base area A of 30 cm² and height h of 0.06 m is submerged in water of density 1000 kg m⁻³. What is the pressure due to the water acting on the top surface of the block?

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Q. A rectangular block with base area A of 30 cm² and height h of 0.06 m is submerged in water of density 1000 kg m⁻³. What is the force exerted by the water acting on the top of the block?

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Q. The mechanic is able to apply a smart effort to lift one side of the car for changing tyres with the help of

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Q. A 15 N force exerted on a small piston of area 0.025 m². The large piston has the area of 0.05 m². What is the pressure exerted on the liquid by the small piston?

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