what would happen to the iron in the coilgun if the electricity in the coil was turned on but not turned off

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Photons with the highest energy have the longest period

Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.