Question 1 :
An external pressure $P$ is applied on a cube at ${0}^{o}C$ so that it is equally compressed from all sides. $K$ is the bulk modulus of the material of the cube and $\alpha$ is its coefficient of linear expansion. Suppose, we want to bring the cube to its original size by heating. The temperature should be raised by

Question 2 :
A metallic wire of young's modulus Y and poisson's ratio $\sigma$, length L and area of cross section A is stretched by a load of W kg. The increase in volume of the wire is:

Question 3 :
If the work done by stretching a wire by $1mm$ is $2J$, the work necessary for stretching another wire of the same material but with half the radius of cross section and half the length by $1mm$ is<br/>

Question 4 :
Temperature of a gas is $20^{0}\mathrm{C}$ and pressure is changed from $1.01\times 10^{5}$ Pa to $1.165\times 10^5\mathrm{P}\mathrm{a}$. If volume is decreased isothermally by 10%. The bulk modulus of gas is (in $Pa$):<br/><br/>

Question 5 :
A sample of a liquid has an initial volume of $1.5 L$. The volume is reduced by $0.2 mL,$ when the pressure increases by $140 kPa$. What is the bulk modulus of the liquid.<br/><br/>

Question 6 :
According to equipartition law of energy each particle in a system of particles have thermal energy E equal to.

Question 7 :
Select the correct option given below:<br/>In order that the heat flows from one part of solid to another part,what is required. ?

Question 8 :
On heating a liquid of cubical expansion $\gamma$ in a container having coefficient of linear expansion $\displaystyle \frac{\gamma}{3}$, the level of liquid in the container will:<br>

Question 9 :
A metal ball immersed in water weighs $w_1$ at $5^{\circ}C\;and\;w_2$ at $50^{\circ}C$. The coefficient of cubical expansion of metal is less than that of water. Then

Question 10 :
Which of the following process(es) occur(s) during the convective transfer of heat within a large volume of air?

Question 11 :
Two rain drops reach the earth with different terminal velocities having ratio $9:4$. Then the ratio of their volume is:

Question 12 :
Work done in blowing a soap bubble of radius $R$ is $W$. The additional amount of work done to increase its radius to $\sqrt { 3 } R$ is :

Question 13 :
&#160;$1m^3$ water is brought inside the lake upto $200 m$ depth from the surface of the lake. What will be change in the volume when the bulk modulus of elasticity of water is $22000 atm$?<br/>(density of water is $1 \times 10^3 kg/m^3$ atmosphere pressure = $10^5 N/m^2$ and $g = 10 m/s^2$

Question 14 :
On charging a soap bubble, its radius increases. This is because&#160;<br/>

Question 15 :
The work done to get n smaller equal size spherical drops from a bigger size spherical drop of water is proportional to