Q161
Open questionThe temperature of the sun is measured with
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Physics GK · all questionsHeat and Thermodynamics
Heat and Thermodynamics
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308
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Q162
Open questionCryogenic shows-
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Q163
Open questionIt is more comfortable to wear white cloth in summer because
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Q164
Open questionGases have
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Q165
Open questionWhich of the following law states that good absorbers of heat are good emitters?
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Q166
Open questionThe average kinetic energy of the molecules of an ideal gas is directly proportional to
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Q167
Open questionThe first law of thermodynamics is simply the case of
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Q168
Open questionConsider the following statements.
Assertion (A) Light coloured clothes are preferred in summer.
Reason (R) Light colours are poor absorbers of heat.
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Assertion (A) Light coloured clothes are preferred in summer.
Reason (R) Light colours are poor absorbers of heat.
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Q169
Open questionA hot body cools from 90°C to 75°C in 25 second. The same body in further cooling from 75°C to 60°C will take how much time?
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Q170
Open questionThe amount of radiation mainly depends upon the-
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Q171
Open questionConsider the following statements.
1. Steam at 100°C and boiling water at 100°C contain same amount of heat.
2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
3. In an air conditioner, heat is extracted from the room air at the evaporator coils and is ejected out at the condensor coils.
Which of these statements is/are correct?
1. Steam at 100°C and boiling water at 100°C contain same amount of heat.
2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
3. In an air conditioner, heat is extracted from the room air at the evaporator coils and is ejected out at the condensor coils.
Which of these statements is/are correct?
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Q172
Open questionCentigrade which is the mother's unit of temperature is named on which of the following-
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Q173
Open questionAssertion (A) A piece of ice added to drink, cools it.
Reason (R) Ice takes latent heat from the drink for melting resulting the cooling of the drink.
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Reason (R) Ice takes latent heat from the drink for melting resulting the cooling of the drink.
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Q174
Open questionA gas thermometer is more sensitive than a liquid thermometer because a gas
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Q175
Open questionWhich of the following is the more thermal insulation in the group?
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Q176
Open questionBorosilicate glass ware is used in microwave ovens because-
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Q177
Open questionIn a pressure cooker food is cooked in shorter time because
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Q178
Open questionThe density of the liquid when heated
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Q179
Open questionThe absolute zero is a temperature at which . . . . . . . .
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Q180
Open questionAssertion (A): Woollen clothes keeps us warm.
Reason (R): Woollen fibres are made from a special type of protein, which is a bad conductor of heat.
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Reason (R): Woollen fibres are made from a special type of protein, which is a bad conductor of heat.
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