It is minimised by a layer of silver /shinny ?coating on the inside surface. Silver or shinny surface is a poor emitter? hence it minimizes heat loss by radiation.
Githiari answered the question on September 16, 2017 at 07:45
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State one factor which affects stability of objects.
Date posted: September 16, 2017. Answers (1)
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Date posted: September 16, 2017. Answers (1)
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Date posted: September 16, 2017. Answers (1)
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Date posted: September 16, 2017. Answers (1)
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In an experiment to estimate the size of a molecule of olive oil, a drop of oil of volume 0.24mm³ was placed on a clean water surface. The oil spread into a patch of area 4.2 x 10⁴mm². Estimate the size of a molecule of olive oil and express your answer in meters.
Date posted: September 16, 2017. Answers (1)
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Date posted: September 16, 2017. Answers (1)
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Date posted: September 16, 2017. Answers (1)
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Date posted: September 16, 2017. Answers (1)
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Date posted: September 16, 2017. Answers (1)
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Date posted: September 16, 2017. Answers (1)
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Date posted: September 15, 2017. Answers (1)
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A magnetized bar is passed over a bunsen flame several times. When tested it is found to be demagnetized. Explain this observation.
Date posted: September 15, 2017. Answers (1)
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An uncharged metal rod is brought close but not touching the cap of a charged electroscope causes a decrease in the divergence of the leaf. Explain.
Date posted: September 15, 2017. Answers (1)
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Give a reason why an air bubble increases in volume as it ascends to the surface of the liquid in a boiler.
Date posted: September 15, 2017. Answers (1)
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Date posted: September 12, 2017. Answers (1)
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Why do bus body builders build luggage compartments under the seats rather than on roof rack?
Date posted: September 9, 2017. Answers (1)
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I bought some red pens at sh 6 each and some blue pens at sh 4 each. If I bought 38 pens in total and paid sh 192 for them, find the number of red and blue pens I bought.
Date posted: June 8, 2017. Answers (1)
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Figure 8 shows a uniform light bar resting horizontally on corks floating on water in two beakers A and B.
Explain why the bar tilts towards side A when equal amount of heat is supplied to each beaker.
Date posted: June 7, 2017. Answers (1)
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The light uniform bar in Figure 3 is in equilibrium. The two beakers A and B contain water at the same temperature. The two blocks are made of the same material.
If the temperature of the water in beaker A is now raised, explain why the beam tips to side A. Assume the solid does not expand.
Date posted: June 7, 2017. Answers (1)
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Figure 11 shows a depletion layer in an unbiased p-n junction.
State how a battery can be used to make the depletion layer narrower.
Date posted: June 7, 2017. Answers (1)