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The mass of a density bottle is 20 g when empty and 45 g when filled with water. If it is filled with liquid x its mass is 400 g. Calculate the density of liquid x. (density of water 1.0 g/cm^3)
Date posted:
October 16, 2017
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When using a density bottle there are some precautions that should be observed. Mention two of them.
Date posted:
October 16, 2017
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State two reasons why lycopodium powder is used in the oil drop experiment.
Date posted:
October 16, 2017
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Explain why a liquid and not a gas is used as a hydraulic machine fluid
Date posted:
October 16, 2017
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The thermal conductivity of a metal increases with the increase cross-sectional area of the metal. Explain how the cross-section affects conductivity using the electron movement.
Date posted:
October 16, 2017
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An air bubble expands as it rises to the surface of water in a deep pond. State the cause of this given that the temperature remains constant.
Date posted:
October 16, 2017
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Explain why Fuel tankers have loose chain under them to touch the ground as they move.
Date posted:
October 16, 2017
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Smoke particle in air when strongly illuminated were observed to describe continuous, random haphazard movements. Explain what would be observed when the air temperature is decreased.
Date posted:
October 14, 2017
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Water in a pond may freeze on the surface but not deep inside the pond explain?
Date posted:
October 14, 2017
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State and explain two factors affecting the surface tension.
Date posted:
October 12, 2017
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The mass of an empty density bottle is 20 g. Its mass when filled with water is 40.0 g and 50.0 g when filled with liquid X. Calculate the density of liquid X if the density of water is 1,000 kgm^-3
Date posted:
October 12, 2017
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State four advantages of a C.R.O as a voltmeter.
Date posted:
October 10, 2017
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State two disadvantages of simple cell.
Date posted:
October 9, 2017
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Describe three ways of discharging an electroscope
Date posted:
October 9, 2017
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State the functions of the following parts of the gols-leaf electroscope.
1. Insulator
2. Metal plate
Date posted:
October 9, 2017
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State two ways of increasing the size of the image in a pinhole camera.
Date posted:
October 4, 2017
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State one advantage of fitting wide tyres on a vehicle that moves on murram roads.
Date posted:
October 4, 2017
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A person alighting from a moving matatu tends to spread his legs. Explain why.
Date posted:
October 4, 2017
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State the function of the following features in a liquid in glass thermometer.
1. Thin walled bulb
2. Thick walled stem.
Date posted:
October 4, 2017
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State two effects of anomalous expansion of water.
Date posted:
October 4, 2017
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Explain the function of the small hole at the side of the cover of a ball point pen.
Date posted:
October 4, 2017
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State and explain how stability of the candle changes as it continues to burn.
Date posted:
October 4, 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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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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Why is Brownian motion only exhibited by small particles?
Date posted:
October 1, 2017
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Explain why a magnet would demagnetize when held in East-west direction.
Date posted:
October 1, 2017
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Explain why it is dangerous for a diver to stay for long time under deep water.
Date posted:
October 1, 2017
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State two properties which makes the oil suitable for use in machines
Date posted:
September 28, 2017
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Give a reason why ink is most likely to ooze out of a pen when one is up in a plane.
Date posted:
September 28, 2017
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Explain why ice skaters use sharp – edged shoes to slide on ice.
Date posted:
September 28, 2017