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VSAQ

1)

Ans: Due to difference in conductivity, metals having high conductivity compared to wood. On touch with a finger,heat from the surrounding flows faster to the finger from metals and so one feels the heat.similarly, when one touches a cold metal the heat from the finger flows away to the surroundings faster

2) Ans: If the system does work against the surroundings so that it compensates for the heat supplied, the temperature can remain constant

3) Ans: Yes. When the gas undergoes adiabatic compression, its temperature increases. dQ = dU + dW As dQ = 0 (adiabatic process) so dU = -dW In compression, work is done on the system So, dW = -ve, hence dU = + ve So internal energy of the gas increases, i.e. its temperature increases.

4) Ans: During driving temperature of the gas increases while its volume remains constant. So according to Charles law, at constant V, P T.Therefore, pressure of gas increases. 5) The Youngs modulus for steel is much more than that for rubber.For the same longitudinal strain, which one will have greatertensile stress? Ans: Steel 6) Is stress a vector quantity? Ans: No

7) Ans:

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