A light wave was calculated to have the length of 4x10^-7 m. what would the energy in the wave be?

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.

Why should seat belts not be mandatory quick plz

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?