Thermal properties of matter practice · Mixed difficulty

'Stem corrections' in Platinum resistance thermometers are eliminated by the use of

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

Two bars of copper having same length but unequal diameter are heated to the same temperature. The change in length will be

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

In a resistance thermometer the resistances at $0^{\circ} \mathrm{C}$ and $100^{\circ} \mathrm{C}$ are $6.74$ and $7.74 \mathrm{~ohm}$ respectively. The temperature corresponding to $6.53 \mathrm{~ohm}$ resistance is

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

An anisotropic substance has coefficients of linear thermal expansions ${\alpha_1},\,\,{\alpha_2},\,\,{\alpha_3}$ along x, y, z axes respectively. Coefficient of cubical expansion of its material is

The surface of a lake is at ${1^ \circ }C$. Find the temperature of the bottom of the lake

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

Colour of shining bright star is an indication of its

Three metal rods of same lengths, and some area of cross section having conductivities 1,2,3 units are connected in series, then their effective conductivity will be

The temperature of an oven, if it radiates 8.28 cal per second through an opening, whose area is $6.1\,\,c{m^2}$ is (Assume that the radiation is close to that of a black body)

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 higher and the lower fixed points on a thermometer are separated by 160 mm when the length of the mercury thread above the lower temperature is 40 mm the temperature reading would be

A clock with a metal pendulum beating seconds keeps correct time at $0^\circ C$. If it losses 12.5s a day at $25^\circ C$ the coefficient of linear expansion of metal pendulum is

There are two spherical balls $A$ and $B$ of the same material with same surface, but the diameter of $A$ is half that of $B$. If $A$ and $B$ are heated to the same temperature and then allowed to cool, then

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

Heat required to melt 10 g of Ice at $0^{\circ} \mathrm{C}.$ $\left[\mathrm{L}_{\mathrm{f}}(\text{ice}\right)=80 \mathrm{~cal} / \mathrm{g}]$

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