Water flows through a horizontal pipe. the diameter of the pipe at point b is larger than the diameter of the pipe at point a. where is the speed of the water the greatest?
a. the speed of the water is the greatest at point b. b. the speed of the water is the same at both points. c. the speed of the water is the greatest at point a. d. the speed of the water cannot be determined without additional information.

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?