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Question
The unit of thermal conductivity is:
A.
B.
C.
D.
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- 1)
At very low temperatures, the heat capacity of a solid is:
- 2)
A copper block of mass 3 kg is heated in a furnace to a temperature of 450 °C and then placed on a large ice block. Find the maximum amount of ice that can melt? (specific heat of copper = 0.39 , heat of fusion of water = 335 )
- 3)
Which of the following statements is INCORRECT for heat ?
- 4)Three stars A,B,C have surface temperatures
respectively. Star A appears bluish, star B appears reddish and star C yellowish. Hence,
- 5)A cup of coffee cools from 90°C to 80°C in t minutes, when the room temperature is 20°C. The time taken by a similar cup of coffee to cool from 80°C to 60°C at a room temperature same at 20°C is
- 6)The energy that will be ideally radiated by a 100 kW transmitter in 1 hour is
- 7)Steam at 100°C is passed into 20 g of water at
When water acquires a temperature of
the mass of water present will be :
- 8)Certain quantity of water cools from
in the next 5 minutes. The temperature of the surroundings is:-
- 9)A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is
Wien’s constant,
Which of the following is correct? - 10)A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is:
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Similar Questions
- 1)
At very low temperatures, the heat capacity of a solid is:
- 2)
A copper block of mass 3 kg is heated in a furnace to a temperature of 450 °C and then placed on a large ice block. Find the maximum amount of ice that can melt? (specific heat of copper = 0.39 , heat of fusion of water = 335 )
- 3)
Which of the following statements is INCORRECT for heat ?
- 4)Three stars A,B,C have surface temperatures respectively. Star A appears bluish, star B appears reddish and star C yellowish. Hence,
- 5)A cup of coffee cools from 90°C to 80°C in t minutes, when the room temperature is 20°C. The time taken by a similar cup of coffee to cool from 80°C to 60°C at a room temperature same at 20°C is
- 6)The energy that will be ideally radiated by a 100 kW transmitter in 1 hour is
- 7)Steam at 100°C is passed into 20 g of water at When water acquires a temperature of
the mass of water present will be :
- 8)Certain quantity of water cools from in the next 5 minutes. The temperature of the surroundings is:-
- 9)A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm isWien’s constant,
Which of the following is correct? - 10)A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is: