What is the relationship in which the ratio of the manipulated variable and the responding variable is constant? a. inverse proportion b. direct proportion c. slope d. interdependent

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

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)

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount