Which of the following is true about the regions of the electromagnetic spectrum? I. Visible light waves have higher frequencies than radio waves.

II. X-rays have shorter wavelengths than visible light waves.

III. Gamma rays have lower frequencies than X-rays.

IV. Ultraviolet waves have longer wavelengths than infrared waves.

A. I, II, III, and IV
B. I and II only
C. III only
D. II and IV only

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.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

Coal contains energy. a. light b. kinetic c. chemical d. mechanical