A thin copper wire of length increases by 1% when heated from 0oC to 100oC. If a thin copper plate of area 2l x l is heated from 0oC to 100oC, the percentage increase in its area will be :
1 %
2 %
3 %
4 %
The average kinetic energy of a gas molecule at 27o C is 6.21 x 10-21 J. Its average kinetic energy at 227o C will be
The coefficient of volume expansion of glycerine is 49 x 10-5 /oC .The fractional change in the density for a 30o C rise in temperature will be :
0.145
0.0145
0.00145
0.000145
Proportional to T3
Proportional to T2
Proportional to
