A raft of wood of mass 120 kg floats in water. The weight that can be put on the raft to make it just sink, should be (d raft = 600 kg/m3)
80 kg
50 kg
60 kg
30 kg
A.
80 kg
Volume of the raft is given by
If the weight of the object is more than this it will sink.
When a system is taken from state i to state f along the path iaf, it is found that Q = 50 cal and W = 20 cal. Along the path’ ibf Q = 36 cal. W along the path ibf is
The work of 146 kJ is performed in order to compress one kilo mole of gas adiabatically and in this process the temperature of the gas increases by 7° C. The gas is
(R = 8.3 J mol−1 K−1 )
Which of the following is incorrect regarding the first law of thermodynamics?
A system goes from A to B via two processes I and II as shown in the figure. If ∆U1 and ∆U2 are the changes in internal energies in the processes I and II respectively, the
Which of the following statements is correct for any thermodynamic system?
Thermodynamic processes are indicated in the following diagram.
Match the following
| Column-1 | Column-2 |
| P. Process I | a. Adiabatic |
| Q. Process II | b. Isobaric |
| R. Process III | c. Isochoric |
| S. Process IV | d. Isothermal |
Mock Test Series
