A pendulum clock consists of an iron rod connected to a small, heavy bob. If it is designed to keep correct time at 20o C, how fast or slow will it go in 24 h at 40o C.
10.4 s
10.72 s
10.68 s
10.9 s
An electric fan is switched on in a closed room. The air in the room
is cooled
is heated
maintains its temperature
is heated or cooled depending upon atmosphere pressure
The kinetic energy of 1 gram of hydrogen gas at 27o C will be
What is the absolute mass of an atom of oxygen? Atomic mass of oxygen is 16 and Avogadro's number =
Two straight metallic strips each of thickness t and length l are riveted together. Their coefficients of linear expansions are If they are heated through temperature , the bimetallic strip will bend to form an arc of radius :
In thermal equilibrium, the average velocity of a gas molecule is
proportional to T3
proportional to T2
proportional to
zero
The number of degrees of freedom for molecules of a monoatomic gas is
3
4
5
6
For O2 gas
1.40
1.33
1.66
1.72
At what temperature is the r.m.s. speed of molecules of hydrogen twice that at S.T.P. ?
273 K
546 K
819 K
1092 K
