What is the speed of a wave on a gets train with a mass of 2.5 KG with the length of 0.25M if the force of tension on a string is 20 N

Will a heavier bowling ball hit pins better than a lighter bsll

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)