The Pyrex glass is having very low coefficient of linear expansion. It is also used as a very good transparent heat resistor as compared to ordinary glass. Explain?

A metal rof having coefficient of linear expansion alpha and Young's modulus Y is heated to raise its temperature by Delta theta . The stress exerted by the rod is

A metal rod having coefficient of linear expansion (alpha) and Young's modulus (Y) is heated to raise the temperature by Delta theta . The stress exerted by the rod

The real coefficient of volume expansion of glycerine is 0.000597 per .^(@)C . Then the apparent volume coefficient of expansion of glycerine in glass will be (linear expansion of glass is 0.000009 per .^(@)C .)

In a mercury-glass thermometer the cross-section of the capillary portion is A_(0) and the volume of the bulb is V_(0) at 273K . If alpha and gamma are the coefficients of linear and cubical expansion coefficients of glass and mercury respectively then length of mercury in the capillary at temperature t^(@)C is (Ignore the increase in cross-sectional area of capillary)

In a cylidrical glass container a solid silica is placed vertically at its bottom and remaining space is filled with mercury upto the top level of the silica. The volume of silica remains unchanged with variation in temperature. The coefficient of cubical expansion of mercury is gamma and coefficient of linear expansion of glass is alpha . If the top surface of silica and mercury level remain at the same level wiht the variation in temperature then the ratio of volume of silica tothe volume of mercury is equal:

A fluid having a thermal coefficient of volume expansion gamma is filled in a cylindrical vessel up to a height h_0 . The coefficient of linear thermal expansion of the material of the vessel is alpha . If the fluid is heated with the vessel , then find the level of liquid when temperature increases by Deltatheta .

In a compensated pendulum a triangular frame ABC is made using two different metals. AB of length l_(1) is made using a metal having coefficient of linear expansion alpha_(1) . BC and AC of length l_(2) each have coefficient of linear expansion alpha_(2) . A heavy bob is attached at C. Pendulum can oscillate about the pivot D. Find (l_(2))/(l_(1)) so that distance of bob from the pivot point D does not change with change in temperature.

When solid is heated , its length changes according to the relation l=l_0(1+alphaDeltaT) , where l is the final length , l_0 is the initial length , DeltaT is the change in temperature , and alpha is the coefficient of linear is called super - facial expansion. the area changes according to the relation A=A_0(1+betaDeltaT) , where A is the tinal area , A_0 is the initial area, and beta is the coefficient of areal expansion. A metal disc having a circular hole at its center is heated . If the metal expands on heating , the diameter of the hole