Question

Q31 What do you understood by thermal expansion, give example? Derive the relation between
coefficient of linear expansion and superficial expansion
In a test experiment on model aero plane in a wind tunnel, the flow speed on the upper and lower
surfaces of the wing are 70m/s and 63m/s respectively. What is the lift on the wing if its area is
2.5m2? Take the density of air to be 1.3kg/m²​

Answer 1

Answer:

Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature.The degree of expansion divided by the change in temperature is called the material's coefficient of thermal expansion. It is found to generally vary with temperature.