The following figure shows a metal cylinder, containing boiling water. One half side A is polished and another half, B is painted black. Two thin metal sheets X and Y are painted black and have one rubber stopper fixed with wax on each sheet. These sheets are equidistant from the boiling water (container A, B) as shown in the diagram. What would you expect to happen after a few minutes? Give a reason for your answer.
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[1] Measurements and Experimentation
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Distinguish between Mercury and Alcohol as a thermometric liquid.
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Water at 0°C is heated to 10°C. Sketch a temperature-volume graph to show the behavior of heating.
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Study the following diagrams and write down your observations.
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The temperature of two bodies A and B differ by 1°C. By how much will it differ on a Fahrenheit scale?
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On a faulty thermometer, a lower fixed point is marked at 10°C and upper fixed point is marked as 130°C. What will be the reading on this thermometer when it is placed in a liquid which is actually at 40°C?
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What is the criterion of choosing the two metals for a bimetal strip?
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Explain the 'anomalous expansion' of water.
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What properties of water slow down the complete freezing of the water in the lake?
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Give reasons for the following:
Even when the water in the lakes is frozen, fish can survive.
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What will be the approximate temperature of water in the lake shown in the following diagram?
(i) At X, and
(ii) At Y?
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How will you demonstrate thermal expansion in liquids? Describe an experiment.
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Describe an experiment to demonstrate thermal expansion in gases.
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Why does a hot glass chimney often crack when a drop of waterfalls on it?
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Name two substances which expand on heating.
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At what temperature the density of water is maximum?
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What is meant by the range of a thermometer?
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Name the liquid used in a clinical thermometer.
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What is the usual range of temperature marked on a clinical thermometer?
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