A 1 kg ball is moving horizontally on a frictionless surface with a speed of 5 m/s. How much net force is needed to keep the ball moving at this velocity? a. 0 N

b. 25 N

c. 10 N

d. 5 N​

What are the applications of electromagnetic waves

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.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.