Q121
Open questionThe heat required in calories to convert one gram of ice at 0°C to steam at 100°C is approximately
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Physics GK · all questionsHeat and Thermodynamics
Heat and Thermodynamics
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Q122
Open questionCooling is done by
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Q123
Open questionHow much calories are there in a Joule?
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Q124
Open question14°F is equal to how many °C?
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Q125
Open questionSteady state heat flow means-
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Q126
Open questionWhich one of the following statement is correct?
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Q127
Open questionSun's heat reaches us by
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Q128
Open questionConsider the following statements.
Assertion (A): If ice collects in the freezer, the cooling in the refrigerator is affected adversely.
Reason (R): Ice is a poor conductor.
Select the correct answer:
Assertion (A): If ice collects in the freezer, the cooling in the refrigerator is affected adversely.
Reason (R): Ice is a poor conductor.
Select the correct answer:
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Q129
Open questionWhich statement is correct regarding the principle of energy conservation?
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Q130
Open questionHeat transfer to any system is measured in the . . . . . . . .
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Q131
Open question. . . . . . . . is a superficial phenomenon
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Q132
Open questionThe variations in temperature from 0°C to 100°C with respect to time of two liquids P, Q are shown in the graph given below.
Which of the following statement is correct?
Which of the following statement is correct?
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Q133
Open questionThe water kept in an earthen pot remains cool even in summer-
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Q134
Open question-273.15°C temperature is equal to:
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Q135
Open questionHeat, in . . . . . . . . is a type of energy transfer from a warmer substance to a colder one.
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Q136
Open questionWhat is the physical state of water at 257° Celsius?
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Q137
Open questionMatch the following.
| Process | Changes |
| a. Evaporation | 1. Liquid into gas |
| b. Sublimation | 2. Solid into gas |
| c. Freezing | 3. Solid into liquid |
| d. Melting | 4. Liquid into solid |
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Q138
Open questionAn assertion and its reason is given below.
Assertion (A): Salt is used for cooking the food at places on higher from sea level.
Reason (R): Temperature is low in higher places.
Which one among these is right answer?
Assertion (A): Salt is used for cooking the food at places on higher from sea level.
Reason (R): Temperature is low in higher places.
Which one among these is right answer?
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Q139
Open questionWhat does an air conditioner installed in a room control?
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Q140
Open questionWhich of the following is not a conductor of electricity?
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