It is not advisable to melt ice directly using an electric heating coil because ice is not a good conduct
johnmulu answered the question on January 16, 2017 at 12:44
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Define specific latent heat of vaporization
(Solved)
Define specific latent heat of vaporization.
Date posted:
January 16, 2017
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Answers (1)
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Why should a safety belt used in a vehicle have a wide surface area and be slightly extensible?
(Solved)
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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Answers (1)
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Define impulse in terms of momentum
(Solved)
Define impulse in terms of momentum
Date posted:
January 16, 2017
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Answers (1)
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A girl throws tennis ball vertically upwards from a truck moving at a constant velocity
(Solved)
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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Answers (1)
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A steel needle when placed carefully on water can be made to float
(Solved)
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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Answers (1)
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Which quantities are kept constant while verifying Charles' law?
(Solved)
State two quantities kept constant while verifying Charles' law.
Date posted:
January 16, 2017
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Answers (1)
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State the law that connects pressure and temperature for a fixed mass of a gas
(Solved)
State the law that connects pressure and temperature for a fixed mass of a gas.
Date posted:
January 16, 2017
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Answers (1)
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Which factors affect upthrust on an object?
(Solved)
State two factors that affect upthrust on an object.
Date posted:
January 16, 2017
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Answers (1)
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What factors affects centripetal force on a body going round a bend apart from radius?
(Solved)
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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Answers (1)
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Define efficiency of a machine
(Solved)
Define efficiency of a machine.
Date posted:
January 16, 2017
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Answers (1)
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What can lower the melting point of ice other than impurities?
(Solved)
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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Answers (1)
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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
(Solved)
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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Answers (1)
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Why is a door handle always fixed well away from the hinge?
(Solved)
A door handle is always fixed well away from the hinge. Explain
Date posted:
January 16, 2017
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Answers (1)
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Explain why milk in a bottle cools faster when the bottle is wrapped with wet towel
(Solved)
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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Answers (1)
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Define specific latent heat of vaporization
(Solved)
Define specific latent heat of vaporization.
Date posted:
January 16, 2017
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Answers (1)
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State samples of bromine vapour are allowed to diffuse separately under different conditions
(Solved)
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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Answers (1)
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Why is it easier to stop a saloon car than a bus moving at the same velocity?
(Solved)
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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Answers (1)
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Why are passengers discouraged from standing on the upper deck of a double-decker bus?
(Solved)
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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Answers (1)
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An air bubble is observed to increase in size as it rises
(Solved)
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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Answers (1)
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A half-metre rule of mass 50g balances off-centre when a 20g mass is suspended at the 2 cm mark.
(Solved)
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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Answers (1)