What are the main characteristics of a standard unit?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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What are the fundamental units? Name some of the fundamental units.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Define the following term:
Coefficient of superficial expansion
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Define the following term:
Coefficient of cubical expansion
[5] Heat and Energy
Chapter: [5] Heat and Energy
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State the relation between the three types of expansion.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Give reasons for the following:
Telephone wires sag in summer.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Give reasons for the following:
In cold countries, water pipes burst in winter.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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The diagram shows a sketch graph showing a change in volume of a given mass of ice at -5°C to water at 15°C.
(i) Why does the temperature along BC remain constant?
(ii) When is the volume of water minimum?
(iii) At what temperature does water have maximum density? Explain.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Complete the following sentence:
When ice melts its volume ______ and density _______.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Equal volumes of alcohol and mercury are heated uniformly in identical containers separately from 10°C to 50°C. Will both the liquids occupy the same volume? Give reason.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Name two substances which expand on heating.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Describe an experiment to demonstrate the thermal expansion of solids.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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'The coefficient of linear expansion for metal is 0.000016 per °C'. Explain the meaning of the statement.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Show by an experiment that the real expansion of a liquid is equal to the sum of its apparent expansion of a liquid is equal to the sum of its apparent expansion and the volume expansion of the vessel containing the liquid.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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State the volume changes that you will observe when a given mass of water is heated from 0°C to 10°C. Sketch a temperature-volume graph to show the behavior.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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State three advantages of using mercury in a thermometer liquid.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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What do you understand by the average speed of a body?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Do speed and average speed of a body have the same meaning?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Which is greater?
(i) 60 km/hr
(ii) 15 m/s
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Convert 20 m/s into km/hr.
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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