A 0.017-kg acorn falls from a position in an oak tree that is 18.5 meters above the ground.
a. What is the velocity of the acorn just before it reaches the ground?
b. What is the kinetic energy of the acorn when it hits the ground? (Ignore air
resistance.)

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

Asystematic approach to problem solving is called a (an)

Which accurately compares concave and convex lenses?