Double walled encloses a vacuum and the cork are poor conductors of heat hence minimizes heat
gain by conduction;
Silvery walls are poor absorbers of heat hence minimizes heat gain through radiation;
gideon1 answered the question on September 28, 2017 at 14:32
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State two factors that lowers the freezing point of ice.
(Solved)
State two factors that lowers the freezing point of ice.
Date posted:
September 28, 2017
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Answers (1)
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Explain why ice skaters use sharp – edged shoes to slide on ice.
(Solved)
Explain why ice skaters use sharp – edged shoes to slide on ice.
Date posted:
September 28, 2017
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Answers (1)
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A body is initially in motion. If no external force acts on the body, describe the subsequent motion.
(Solved)
A body is initially in motion. If no external force acts on the body, describe the subsequent motion.
Date posted:
September 28, 2017
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Answers (1)
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Apart from friction, name another factor that reduces efficiency in machines.
(Solved)
Apart from friction, name another factor that reduces efficiency in machines.
Date posted:
September 28, 2017
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Answers (1)
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When does total internal reflection take place.
(Solved)
When does total internal reflection take place.
Date posted:
September 28, 2017
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Answers (1)
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Define Critical angle.
(Solved)
Define Critical angle.
Date posted:
September 28, 2017
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Answers (1)
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Explain how a transverse stationary wave is generated using a string.
(Solved)
Explain how a transverse stationary wave is generated using a string.
Date posted:
September 28, 2017
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Answers (1)
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Explain why charged conductor mounted on an insulator will lose its charge after some time.
(Solved)
Explain why charged conductor mounted on an insulator will lose its charge after some time.
Date posted:
September 28, 2017
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Answers (1)
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State the mode by which heat is lost from a black can filled with hot water.
(Solved)
State the mode by which heat is lost from a black can filled with hot water.
Date posted:
September 28, 2017
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Answers (1)
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What is elastic collision.
(Solved)
What is elastic collision.
Date posted:
September 28, 2017
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Answers (1)
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Distinguish between evaporation and boiling.
(Solved)
Distinguish between evaporation and boiling.
Date posted:
September 28, 2017
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Answers (1)
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Explain how air pollution by smoke from a factory chimney can be minimized using a charged object.
(Solved)
Explain how air pollution by smoke from a factory chimney can be minimized using a charged object.
Date posted:
September 28, 2017
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Answers (1)
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Explain why water pipe bursts are common in countries near the poles
(Solved)
Explain why water pipe bursts are common in countries near the poles
Date posted:
September 28, 2017
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Answers (1)
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State any two factors that affect the earth's gravitational force.
(Solved)
State any two factors that affect the earth's gravitational force.
Date posted:
September 28, 2017
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Answers (1)
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State three factors that affect the pitch of a stretched string.
(Solved)
State three factors that affect the pitch of a stretched string.
Date posted:
September 28, 2017
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Answers (1)
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Explain what happens when a negatively charged polythene rod touches the cap of the positively charged electroscope.
(Solved)
Explain what happens when a negatively charged polythene rod touches the cap of the positively charged electroscope.
Date posted:
September 28, 2017
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Answers (1)
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Define the term local action
(Solved)
Define the term local action
Date posted:
September 28, 2017
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Answers (1)
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Explain why solids have definite shapes.
(Solved)
Explain why solids have definite shapes.
Date posted:
September 28, 2017
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Describe one method of determining the diameter of the oil drop
(Solved)
Describe one method of determining the diameter of the oil drop
Date posted:
September 27, 2017
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Answers (1)
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State the principle of conservation of energy
(Solved)
State the principle of conservation of energy
Date posted:
September 27, 2017
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Answers (1)