A metal rod of length 'L' is clamped rigidly at its midpoint. If its temperature is increased by $\Delta T$, the longitudinal strain developed in the rod is:

A metal ball immersed in water weights ${w_1}\;{\rm{at}}\;{0^ \circ }{\rm{C and}}\;{w_2}\;$ at 50$^ \circ C$. The coefficient of cubical expansion of metal is less than that water. Then

Which of the following pairs is wrong

The coefficient of linear expansion of brass and steel are ${\alpha _1}$ and ${\alpha _2}$. If we take a brass rod of length ${l_1}$ and steel rod of length ${l_2}$ at ${0^0}C$, their difference in length $\left( {{l_2} - {l_1}} \right)$ will remain the same at a temperature if

The amount of heat conducted out per second through a window, when inside temperature is ${10^0}C$ and outside temperature is $- {10^0}C$, is 1000 J. Same heat will be conducted in through the window, when outside temperature $- {23^0}C$ and inside temperature is

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

If temperature of an object is ${140^0}F$ then its temperature in centigrade is

The coefficient of linear expansion is dependent on which of the following?

A centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers ${140^0}$. What is the fall in temperature as registered by the Centigrade thermometer

A Clock with metal pendulum beating seconds keeps correct time at ${0^0}C$. If it loses 12.5 S a day at ${25^0}C$

The coefficient of linear expansion of metal pendulum is

On a new scale of temperature (which is linear) and called the scale, the freezing and boiling points of water are ${39^{\rm{o}}}W$ and ${239^{\rm{o}}}W$ respectively. What will be the temperature on the new scale, corresponding to a temperature of ${39^{\rm{o}}}C$ on the Celsius scale