Your goal in laboratory is to launch a ball of mass m straight up so that it reaches exactly height h above the top of the launching tube. you and your lab partners will earn fewer points if the ball goes too high or too low. the launch tube uses compressed air to accelerate the ball over a distance d, and you have a table of data telling you how to set the air compressor to achieve a desired acceleration. a) find an expression for the acceleration that will earn you maximum points. b) evaluate your answer to part a to achieve a height of 2.5m using a 49cm -long launch tube. explain in detail steps.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

What is the speed of an object at a given moment?