Question

2. Answer the following questions:
[4]
a) State the relationship between coefficients of all the type of expansions.
b) Compare the expansion in Solid, Liquid and Gases.
c) What is spectrum and dispersion of light?
d) Write a short note on volumetric expansion​

Answer 1

Answer:

a)

The relationship between the area and linearthermal expansion coefficient is given as the following: αA=2αL α A = 2 α L . Just like the linearexpansion coefficient, the area thermal expansion coefficient works as an approximation over a narrow temperature interval only.

b)

Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight theyexpand more than solids. ... Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gasincreases more than the volume of asolid or liquid

c)

When white light passes through a prism, it disperses into a band of seven different colours. This band of colours obtained from the dispersion of light is called a spectrum. Dispersion of light in a prism results in the formation of aspectrum.

d)

Volume expansion

is the rate of change of that volume with temperature. This means that thevolume of a material changes by some fixed fractional amount. For example, a steel block with a volume of 1 cubic meter might expand to 1.002 cubic meters when the temperature is raised by 50 K. This is an expansion of 0.2%.

(ANSWER)