Physics
A certain mass of solid substance is heated for a period of 50 min. Its heating curve is shown below :
From the graph, which one of the following statement is correct?
- The boiling point of the given substance is 40°C.
- The specific latent heat of fusion of substance is the same as the specific latent heat of vaporisation.
- The substance has a higher specific heat capacity in solid state than that in liquid state.
- The substance has a lower specific heat capacity in solid state than that in liquid state.
Related Questions
In the circuit shown, lamps L1 and L2, are identical. The sliding contact at O moved towards Q, then which of the statements about the effect on the brightness in L2 is correct?
- Initially it has no light, then its brightness increases gradually and becomes equal to that of L1
- Initially it is same as that of L1, and finally become half as that of L1
- Initially it is half as that of L1 and finally becomes equal to that of L1.
- Initially it is half as that of L1 and finally becomes zero.
In which of the following figures shown, will the sound of a tuning fork hit with rubber pad at end A be heard maximum at end B?
- I
- II
- Both I and II
- Cannot be decided
The force of 20 N is applied at distance of 40 cm from the axis. The moment of force is
- 8 N-m
- 0.4 N-m
- 8.5 N-m
- 20 N-m