Firemen are shooting a stream of water at a burning build- ing using a high-pressure hose that shoots out the water with a speed of 25.0 m/s as it leaves the end of the hose. Once it leaves the hose, the water moves in projectile motion. The firemen adjust the angle of elevation a of the hose until the water takes 3.00 s to reach a building 45.0 m away. You can ignore air resistance; assume that the end of the hose is at ground level. (a) Find the angle of elevation a. (b) Find the speed and acceleration of the water at the highest point in its trajectory. (c) How high above the ground does the water strike the building, and how fast is it moving just before it hits the building?

Water c omes out of the bottom of this water tank at a speed of 4.22 m/s. If the water is directed upward, how high will the water go?

A professor drops a water bottle whose lid is closed from certain a certain height. The water bottle has a hole in it and water is leaking. What happens when the bottle is dropped? Explain in a short paragraph (five sentences) why the water stops leaking. Use diagrams and figures as necessary.

A pitot tube is depicted in the figure. V, = 0 -V 2 U כו (b) Calculate the velocity of the moving air if a mercury manometer's height is 0.195 m in m/s. Assume the density of mercury is 13.6 × 103 kg/m³ and the density of air is 1.29 kg/m².

At what horizontal distance d from the building base, where should the fireman place the hose for the water to reach its maximum height as it strikes the building? Express this distance, d, in terms of v0, θ, and g.

Water leaks from a hole in a water tank which is a 17.66 meters below the surface of the water which is 3.83 meters deep.The velocity of the water just leaving the hole is

Part 1 The hose is held at an angle 0 = 30° with the horizontal, and the water is discharged at A with a speed of vд = 40 ft/s. If the water stream strikes the building at B, determine the two possible distances s from the building. Part 2 Water is discharged from the hose with a speed of 40 ft/s. Determine the two possible angles the firefighter can hold the hose so that the water strikes the building at B. Take s = 20 ft. VA = 40 ft/s A 4.5ft B 10ft

A thin stream of water flows smoothly from a faucet and falls straight down. At one point, the water is flowing at a speed of ?1=1.07 m/s . At a lower point, the diameter of the stream has decreased by a factor of 0.787 . What is the vertical distance ℎbetween these two points?

A person has placed a large, open-topped container 10m high. They fill the container with water to the top. With a sharp needle, they poke a tiny hole near the bottom of the container. The water sprays horizontally out of the hole, arcs through the air like a projectile, and splashes 15m away. How high above the hole is the top of the container?

Water is discharged from the hose with a speed of 42ft/sec. Determine the two possible angles the fireman can hold the hose so that the water strikes the building at B. Take S=20ft. VA = 40 ft/s 0 8 ft 4 ft