Why is it important to a nation that they be able to develop and control the production of items such as computer chips, batteries, drills, and software?
to prevent technical espionage
O to enforce copyright laws
to enhance manufacturing capacity
O to enhance patriotism

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?