a. The thin T-shirts traps air which is a bad conductor of heat hence trap the heat produced by the body
making a person feel warmer.
b. Hot air rises upwards since it is lighter than cold air
c. Hot air rises upwards and cold air replaces the air which has risen up.
joseph rimiru answered the question on October 30, 2017 at 17:38
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Date posted:
October 30, 2017
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Date posted:
October 30, 2017
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Date posted:
October 30, 2017
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October 30, 2017
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October 30, 2017
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October 30, 2017
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Date posted:
October 30, 2017
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October 30, 2017
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Date posted:
October 27, 2017
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Explain briefly a mechanism by which heat is conducted through a metal.
Date posted:
October 27, 2017
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(Solved)
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Date posted:
October 27, 2017
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Explain why water stored in an earthen jar becomes cooler than the one which is stored in a metallic jar.
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Date posted:
October 27, 2017
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Date posted:
October 27, 2017
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A spring extends by 2cm when a mass of 50g is hanged on it. What force is required to extend it by 2.5cm?
Date posted:
October 27, 2017
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October 27, 2017
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Date posted:
October 27, 2017
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What is the purpose of the pear- shaped cross section of a clinical thermometer.
Date posted:
October 27, 2017
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Answers (1)
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Describe how microwaves are used in determining distances of objects as in the radar
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Describe how microwaves are used in determining distances of objects as in the radar
Date posted:
October 27, 2017
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The element of an electric hot plate has a resistance of 80Ohms. What is the energy dissipated when the element is kept on for 20...
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Date posted:
October 27, 2017
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(Solved)
A student stands at a distance 400m from a wall and claps two pieces of wood. After the first clap the student claps whenever an echo is heard from the wall. Another student starts a stopwatch at the first clap and stops it after the twentieth clap. The stopwatch records a time of 50 seconds. Find the speed of sound.
Date posted:
October 27, 2017
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Answers (1)