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A student measured the length of a wire four times using a metre rule and obtained the following readings: 18.6 cm; 18.5 cm and 18.6 cm. Determine the length the length the student should record
Date posted:
February 6, 2017
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State the reason why it is not correct to quote the weight of solid objects in kilograms
Date posted:
February 6, 2017
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A stopwatch started 0.50s after the start button was pressed. The time recorded using the stopwatch for a ball bearing falling through a liquid was 2.53s. Determine the time of fall.
Date posted:
February 6, 2017
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A drug manufacturer gives the mass of the active ingredient in a tablet as 5 mg. Express this quantity in kilogramme and in standard form.
Date posted:
February 6, 2017
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Mechanics is one of the branches of physics. State what it deals with.
Date posted:
February 6, 2017
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State two ways through which the rate of evaporation of a liquid may be increased.
Date posted:
January 16, 2017
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State Archimedes' principle.
Date posted:
January 16, 2017
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State the pressure law for an ideal gas.
Date posted:
January 16, 2017
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Give a reason why it is not advisable to melt ice directly using an electric heating coil.
Date posted:
January 16, 2017
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Define specific latent heat of vaporization.
Date posted:
January 16, 2017
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Give reasons why a safety seat belt used in a vehicle;should have a wide surface area and should be slightly extensible.
Date posted:
January 16, 2017
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Define impulse in terms of momentum
Date posted:
January 16, 2017
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A girl throws tennis ball vertically upwards from a truck moving at a constant velocity. Give the reason why the ball lands back exactly the same point where it was projected.
Date posted:
January 16, 2017
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A steel needle when placed carefully on water can be made to float. When detergent is added to the water it sinks. Explain this observation.
Date posted:
January 16, 2017
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State two quantities kept constant while verifying Charles' law.
Date posted:
January 16, 2017
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State the law that connects pressure and temperature for a fixed mass of a gas.
Date posted:
January 16, 2017
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State two factors that affect upthrust on an object.
Date posted:
January 16, 2017
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A part from radius, state two other factors that affects centripetal force on a body going round a bend.
Date posted:
January 16, 2017
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Define efficiency of a machine.
Date posted:
January 16, 2017
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One of the factors that can lower the melting point of ice is addition of impurities. State one other.
Date posted:
January 16, 2017
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When a steel ball bearing is dropped into a tall jar full of glycerine, it falls to reach a point when it attains a steady velocity. State the force that varies to make this possible.
Date posted:
January 16, 2017
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A door handle is always fixed well away from the hinge. Explain
Date posted:
January 16, 2017
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Milk in a bottle cools faster when the bottle is wrapped with a wet towel than when it is immersed in a bucket of cold water. Explain
Date posted:
January 16, 2017
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Define specific latent heat of vaporization.
Date posted:
January 16, 2017
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State samples of bromine vapour are allowed to diffuse separately under different conditions; one in vacuum and the other in air. State and explain the observation made.
Date posted:
January 16, 2017
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It is easier to stop a saloon car than a bus moving at the same velocity. What is the reason?
Date posted:
January 14, 2017
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Explain why passengers are discouraged from standing on the upper deck of a double-decker bus.
Date posted:
January 14, 2017
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An air bubble is observed to increase in size as it rises through a liquid column and bursts on reaching the surface. Explain this observation.
Date posted:
January 14, 2017
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A half-metre rule of mass 50 g balances off-centre when a 20 g mass is suspended at the 2 cm mark. Determine the position of the pivot.
Date posted:
January 14, 2017
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Factors that affect the rate of flow of heat through a metal conductor
Date posted:
January 14, 2017