The main purpose of the turbine in the turbojet engine is to
a. drive the compressor.
b. reduce the temperature of the exhaust gas.
c. increase the velocity of the exhaust gases.
d. compress the air. ~it is not d.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Examine the nuclear reacti why is this classified as a nuclear reaction rather than a chemical reaction? it is not balanced. a new compound is formed. a change has occurred in a nucleus. a new element has been formed.

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.