4. (4 pts) Thermal Expansion of Gasses. Unlike solids which maintain their shape and have a linear coefficient of thermal expansion, a=(1/D)(dL/dT), fluids (both liquids and gasses) have no shape, and hence no length, so they fill the container in which they are placed, so for fluids we can only define a volume coefficient of thermal expansion, B or P where the subscript P on the partial derivative means that we evaluate the change in volume with temperature while holding the pressure fixed. a. (3 pts) What is the volume coefficient of thermal expansion for an Ideal Gas at 0 C to three significant figures? b. (1 pt) All ordinary gasses at ordinary temperatures and ordinary pressures obey the Ideal Gas Law to an excellent approximation. How does your result in part (a) compare to the actual coefficient for air at 0 C