Thermal properties of matter practice · Medium

For an ideal conductor, thermal resistance is

The saturation vapour pressure of water at ${100^0}C$ is

The temperature of equal masses of three different liquids $x$, $y$ and $z$ are $10^\circ C,\,\,20^\circ C$ and $30^\circ C$, respectively. The temperature of mixture when $x$ is mixed with $y$ is $16^\circ C$ and that when $y$ is mixed with $z$ is $26^\circ C$. The temperature of mixture when $x$ and $z$ are mixed will be

Triple Point of Water is

The Fahrenheit and Kelvin scales of temperature will give the same reading at

The correct statement of the law of equipartition of energy is

In anomalous expansion of water, at what temperature, the density of water is maximum?

When the temperature of a rod increases from $t$ to $t + \Delta t$ its moment of inertia increases from $I$ to $I + \Delta I$. If $\alpha$ be the coefficient of linear expansion of the rod, then the value of $\frac{{\Delta I}}{I}$ is

The real coefficient of volume expansion of glycerine is $0.000597$ per $^0C$ and linear coefficient of expansion of glass is $0.000009$ per $^0C$ . Then the apparent volume coefficient of expansion of glycerine is

The temperature at which the vapour pressure of a liquid becomes equals to the external (atmospheric) pressure is its

Mercury boils at ${367^0}C$. However, mercury thermometers are made such that they can measure temperature up to ${500^0}C$. This is done by

Substance having very small coefficient of linear expansion, among the following is

Mercury thermometers can be used to measure temperatures upto

A metal rod of Young’s modulus $\gamma$ and coefficient of thermal expansion $\alpha$ is held at its two ends such that its length remains invariant. If its temperature is raised by ${t^0}C$, the linear stress developed in it is

When a bimetallic strip made of iron $\left( {{\alpha _1}} \right)$ and copper $\left( {{\alpha _2}} \right)$ is heated $\left( {{\alpha _2} > {\alpha _1}} \right)$

Two spherical black bodies made of same material and with the same surface finish have masses ${M_1}and\mathrm{ }{M_2}$ and are at temperatures ${T_1} and \mathrm{ }{T_2}$ . If they are radiating the same power, ${M_1}/{M_2}$ must be

A device used to measure temperature is

In an isochoric process if ${T_1} = {27^\mathrm{o}}C\mathrm{ }\,\,\,\mathrm{and}\,\,\,\mathrm{ }{T_2} = {127^\mathrm{o}}C$, then ${P_1}/{P_2}$ will be equal to

The initial temperature of a body is ${80^0}C$ . If its temperature falls to ${64^0}C$ in 5 minutes and in 10 minutes to ${52^0}C$ then the temperature of surrounding will be

Assertion (A): A brass disc fits snugly in the hole of the iron plate. To remove the disc the combination must be heated.
Reason (R): The coefficient of linear expansion of brass is less than that of iron

Assertion (A): A man would feel iron or wooden balls equally hot at $98.4^{\circ} \mathrm{F}$
Reason (R): At $98.4^{\circ} \mathrm{F}$ both iron and wood have same thermal conductivity.

On a clear sunny day, an object at temperature T is placed on the top of a high mountain. An identical object at the same temperature is placed at the foot of mountain. If both the objects are exposed to sun-rays for two hours in an identical manner, the object at the top of the mountain will register a temperature

A liquid of mass M and specific heat S is at a temperature 2t. If another liquid of thermal capacity 1.5 times, at a temperature of $\frac{t}{3}$ is added to it, the resultant temperature will be

For one mole of an ideal gas which of the following relation is correct?

Statement-I: A thin rod and a thick rod made of same material having same length are given same amount of heat $\theta$. Then the thin rod expands more.
Statement-II: The linear expansion depends upon initial length of the rod only.

A slab consists of two parallel layers of two different materials of same thickness having thermal conductivities ${{K_1}}$ and ${{K_2}}$. The equivalent conductivity of the combination is

5 g of ice at ${0^0}C$ is dropped in a beaker containing 20 g of water at ${40^0}C$. The final temperature will be

In which case the thermal conductivity increases from left to right

In determining the temperature of a distant star, one makes use of

A liquid cools down from ${70^0}C$ to ${60^0}C$ in 5 minutes . The time taken to cool it from ${60^0}C$ to ${50^0}C$ will be