Explain, why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.
[4.1] Fluids
Chapter: [4.1] Fluids
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With the help of a diagram, show that water is a bad conductor of heat.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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A wooden knob and a metal latch on a door are both at room temperatures. Explain, why the latch is colder to touch.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Complete the following sentence:
CGS units of heat is _________
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Is the following statement correct? If not, modify it suitably to make it correct. "The earth moves round the sun with uniform velocity".
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Name some ambient pressure diving suits.
[4.1] Fluids
Chapter: [4.1] Fluids
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What fact about liquid pressure does the following diagram in the following figure illustrate?
[4.1] Fluids
Chapter: [4.1] Fluids
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What is a manometer? How does it show whether the pressure inside a vessel connected to one arm of it, is lower or above the atmospheric pressure?
[4.1] Fluids
Chapter: [4.1] Fluids
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Why is an aneroid barometer called so?
[4.1] Fluids
Chapter: [4.1] Fluids
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What is a barometer to write two uses of a barometer?
[4.1] Fluids
Chapter: [4.1] Fluids
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What is the SI unit of density?
[4.1] Fluids
Chapter: [4.1] Fluids
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What do you mean by relative density?
[4.1] Fluids
Chapter: [4.1] Fluids
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What is heat ? Write its S.I. unit.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Two bodies at different temperatures are placed in contact. State the direction in which the heat will flow.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Name the S.I. unit of heat and how is it related to the unit calorie?
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Define temperature and write its S.I. unit.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Why does a piece of ice when touched with a hand, appear cool? Explain.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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Distinguish between heat and temperature.
[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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Name two substances which contract on heating.
[5] Heat and Energy
Chapter: [5] Heat and Energy
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