A static test stand is to be designed for testing a diffuser of a jet engine. The following conditions are known for the test: 50 kg/s of air enter a diffuser at a velocity of 750m/s and static pressure of 20kPa. The air leaves the diffuser at a velocity of 90 m/s and static pressure of 330 kPa. The entrance area of the diffuser is 0.25 m2and the exit area is 0.28 m3. Determine the magnitude and direction of the strut force necessary to hold the diffuser stationary when this diffuser is operated in an atmospheric pressure of 20 kPa.

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative