1. Two kilograms of 40-C air is contained in a 4-m3 volume. Calculate the pressure, density, specific volume, and specific weight.
2. The temperature outside a house is -20-C and inside it is 20-C. What is the ratio of the density of the outside air to the density of the inside air? Would inflltration, which results from cracks around the windows, doors, and siding, etc., occur even with no wind causing a pressure difference?