Astuffed toy with a mass of 0.900 kilograms sits on the edge of a bed at a height of 0.830 meters. if the toy falls off the bed, what will its kinetic energy be at a height of 0.500 meters? (ignore frictional effects.) 0.0 j 2.9 j 4.4 j 7.3 j

Aballet student who learns with the of his instructor is demonstrating learning.

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)

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.