Afootball player runs 20 meters north of a football field, and then 15 meters east. the total motion lasted 15 seconds. what was his average speed

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Orange juice has a lower or higher viscosity than chocolate syrup

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)