Suppose you are holding an air-filled ball of mass m = 0.3 kg into the water at a certain depth. When you release it, it will be accelerated upward. Three forces act on the ball after it is released: an upward buoyant force B =+574 N, the ball's weight W = mg, and a resistance force R = -280 N. What is the acceleration a (magnitude and direction) of the ball? (Note: boldface letters indicate vectors.)

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a. a piece of paper b. a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block