1. Q16. Temperature And Heat

2. When a certain constant volume gas thermometer is in thermal contact with water at its triple point ( K) the pressure is 6.30  104 Pa. For this thermometer a kelvin corresponds to a change in pressure of about:
4.34  102 Pa
2.31  102 Pa
1.72  103 Pa
2.31  103 Pa
1.72  107 Pa
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3.  
for

4. A cube of aluminum has an edge length of 20 cm
A cube of aluminum has an edge length of 20 cm. Aluminum has a density 2.7 times that of water and a specific heat times that of water. When the internal energy of the cube increases by cal, its temperature increases by:
5 C˚
10 C˚
20 C˚
100 C˚
200 C˚
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6. Take the mechanical equivalent of heat as 4 J/cal
Take the mechanical equivalent of heat as 4 J/cal. A 10-gram bullet moving at 2000 m/s plunges into 1 kg of paraffin wax (specific heat 0.7 cal / g °C). The wax was initially at 20°C. Assuming that all the bullet's energy heats the wax, its final temperature (°C) is :
20.14
23.5
20.006
27.1
30.23
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8. The rate of heat flow through a slab is Pcond
The rate of heat flow through a slab is Pcond. If the slab thickness is doubled, its cross-sectional area is halved, and the temperature difference across it is doubled, then the rate of heat flow becomes:
2Pcond
Pcond /2
Pcond
Pcond /8
8Pcond
<PowerClick><Answer>2</Answer><Option>5</Option></PowerClick>