List of top Physics Questions on thermal properties of matter asked in MHT CET

A motor cyclist has to rotate in horizontal circles inside the cylindrical wall of inner radius 'R' metre. If the coefficient of friction between the wall and the tyres is '$\mu_s$', then the minimum speed required is ( g = acceleration due to gravity)
If the power factor changes from 0.5 to 0.25 because impedance changes from $Z_1$ to $Z_2$ then $Z_1 = x Z_2$. The value of x is (Resistance remains constant)
There is head-on elastic collision between the two particles moving in the same direction with speeds \(5\text{ m/s}\) and \(3\text{ m/s}\) respectively. After collision, the velocity of the first particle becomes \(4\text{ m/s}\) in the same direction. The velocity of the second particle should be
When a ceiling fan is switched off, its angular velocity falls to \((\frac{1}{3})^{\text{rd}\) while it makes 24 rotations. How many more rotations will it make before coming to rest?
The temperature of a body on Kelvin scale is ' $x\text{ }K$ '. When it is measured by a Fahrenheit thermometer, it is found to be ' $x\text{ }^\circ\text{F}$ '. The value of ' $x$ ' is (nearly)}
A concave lens (refractive index $= 1.5$) has both surfaces of same radius of curvature R . If it is immersed in a liquid of refractive index 1.75 it will act as a}
The fundamental frequency of a sonometer wire is 50 Hz for some length and tension. If the length is increased by 25% by keeping tension same then frequency change of second harmonic is
A 200 g sample of water at 80°C is mixed with 100 g of water at 20°C. Assuming no heat loss to the surroundings, what is the final temperature of the mixture?
A copper block of mass 2 kg is heated from 20°C to 100°C. If the specific heat capacity of copper is \( 400 \, \text{J/kg°C} \), how much heat energy is absorbed by the block? (Assume no phase change occurs.)
The volume of a block of metal at \(30^\circ\text{C}\) changes by \(0.12\%\) when its temperature is increased to \(70^\circ\text{C}\). The coefficient of linear expansion of the metal is
On an imaginary linear scale of temperature (called 'W' scale) the freezing and boiling points of water are $39^\circ\text{W}$ and $239^\circ\text{W}$ respectively. The temperature on the new scale corresponding to $39^\circ\text{C}$ temperature on Celsius scale will be
The volume of a block of metal at \(30^\circ\text{C}\) changes by \(0.12\%\) when its temperature is increased to \(70^\circ\text{C}\). The coefficient of linear expansion of the metal is