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Give two external factors that affect the rate of evaporation of a liquid.
Date posted:
October 2, 2017
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Briefly describe how you would make an electromagnet
Date posted:
October 2, 2017
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Describe one practical application of the Photoelectric effect.
Date posted:
October 2, 2017
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In a photoelectric effect experiment, light was directed incident to a metal surface. The wavelength of the light was then doubled maintaining the intensity constant. Explain the resulting effect to:
(I) Photoelectric current
(ii). Kinetic energy of the Photoelectrons.
(iii). Work function of the metal.
Date posted:
October 2, 2017
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State two factors that affect the heating effect of current flowing through a wire.
Date posted:
October 2, 2017
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State two factors that affect period of waves in a stretched string.
Date posted:
October 2, 2017
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Explain why the density of the same material changes with temperature increase.
Date posted:
October 2, 2017
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Define atomic number.
Date posted:
October 2, 2017
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define Power
Date posted:
October 2, 2017
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Define work
Date posted:
October 2, 2017
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Define mechanical advantage.
Date posted:
October 2, 2017
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Explain why atmospheric pressure decreases towards high altitudes.
Date posted:
October 2, 2017
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Explain why it is easier to hear sounds at night than during the day.
Date posted:
October 2, 2017
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Explain why evaporation is always accompanied by a cooling effect.
Date posted:
October 2, 2017
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Explain how demagnetization is achieved by heating a magnet, using the domain theory.
Date posted:
October 2, 2017
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Explain why distilled water has to be added in car batteries often.
Date posted:
October 2, 2017
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Explain why television or computer screens often become very dusty as compared to their neighboring surfaces.
Date posted:
October 2, 2017
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Explain why a lady wearing sharp heeled shoes is not likely to skid on a slippery mud road.
Date posted:
October 2, 2017
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A bus moves round a circular bend at a constant speed of 10m/s. Explain whether it is in equilibrium.
Date posted:
October 1, 2017
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Explain how polarization of a simple cell affects its emf.
Date posted:
October 1, 2017
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Explain the importance of a fuse in domestic wiring.
Date posted:
October 1, 2017
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Explain why a ship made of steel will float on water while a coin made of steel sinks.
Date posted:
October 1, 2017
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A ship moves from a region in the sea with fresh water to a region of salty water its weight remaining constant. Explain what is observed.
Date posted:
October 1, 2017
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Explain the function of plimsoll lines on a ship.
Date posted:
October 1, 2017
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Distinguish between kinetic energy and potential energy.
Date posted:
October 1, 2017
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Why are the plane mirrors not used as driving mirrors?
Date posted:
October 1, 2017
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Explain why power cables to an electric cooker are thicker than the ones in the lighting.
Date posted:
October 1, 2017
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Why is Brownian motion only exhibited by small particles?
Date posted:
October 1, 2017
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A student directed a highly charged pointed conductor towards a candle flame. The flame bent. Explain this observation.
Date posted:
October 1, 2017
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State the main energy changes that take place in a filament lamp.
Date posted:
October 1, 2017