Thermal Expansion of Solids, Liquids and Gases

A wire is made by attaching two segments together end to end. One segment is made of aluminium and the other is steel. The effective coefficient of linear expansion of the two segment wire is $19\times {10}^{-6} °{\mathrm{C}}^{-1}$. The fraction length of aluminium is $\frac{x}{11}$ then find $x$. (linear coefficients of thermal expansion of aluminium and steel are $23\times {10}^{-6} °{\mathrm{C}}^{-1}$ and $12\times {10}^{-6} °{\mathrm{C}}^{-1}$ respectively)

A steel metre scale is to be ruled so that the millimetre intervals are accurate to about $5\times 10-5 \mathrm{mm}$ at a certain temperature. The maximum temperature variation allowed during ruling is (the co-efficient of linear expansion of steel $=10\times 10-6 \mathrm{K}-1)$

A metal rod is fixed rigidly at two ends so as to prevent its thermal expansion. If $L$, $\alpha$ and $Y$ respectively denote the length of the rod, coefficient of linear thermal expansion and Young’s modulus of its material, then for an increase in temperature of the rod by $∆T$, the longitudinal stress developed in the rod is

At what temperature does water boil under normal conditions.

What is normal melting point of a substance?

The _____ melting point, also known as the complete melting point because temperature at given rate becomes completely clear.

The melting point(K) of mercury is 236.

The melting point ( K) of aluminium is:-

What are the common factor which is responsible for increase in melting point? 

Assertion $\left(\mathrm{A}\right)$: A brass disc is just fitted in a hole in a steel plate. The system must be cooled to loosen the disc from the hole.
Reason $\left(\mathrm{R}\right)$: The coefficient of linear expansion for brass is greater than coefficient of linear expansion for steel.

The water on the surface of a lake is just about to freeze. The most likely temperature at the bottom of the lake is

When a meter rod made of silver at $0°\mathrm{C}$ is heated to $100°\mathrm{C},$ its length increased by $0.19 \mathrm{cm}.$ Then find the coefficient of volume expansion of the silver.

A bimetallic strip is made of aluminium and steel $\left({\alpha }_{Al}>{\alpha }_{\text{steel }}\right).$ On heating, the strip will $\_\_\_\_\_\_\_\_\_$

If $\alpha$ and $\beta$ be the volume and pressure coefficients respectively of an ideal gas, then

The normal boiling point of a liquid is that temperature at which vapour pressure of the liquid is equal to:

All liquids boil at higher temperature than their normal boiling point when they contain _____ impurities.

All liquids boil at higher temperature than their normal boiling point when they contain non-volatile impurities.

What is meant by Normal Boiling Point?

When a bimetallic strip is heated, it

A compressive force, F is applied at the two ends of a long thin steel rod. It is heated, simultaneously, such that its temperature increases by $\mathrm{\Delta }T$. The net change in its length is zero. Let $l$ be the length of the rod, A its area of cross-section, $Y$ its Young's modulus, and $\alpha$ its coefficient of linear expansion. Then, F is equal to: