a stream of water exits from the nozzle of a hose at a speed of 16m/s. the vertical wall of a burning building is a horizontal distance D=4.0 m away from the nozzle. I understand and got the correct answers for the first two questions, but i need help on the third question. 1.) if the nozzle is pointing at an angle of 40 Degrees above horizontal, how long does it take for the water to travel from the nozzle to the wall? 0.33s (it's correct, no need to check) 2.) At what height above the nozzle does the water hit the wall? 2.8 m ( this is also correct) ok, i'm stuck on the third question.... 3.) If the angle of the nozzle is changed to maximize the height of the water of the wall, what height above the nozzle does the water hit the wall? The thing i dont understand is finding the angle of the nozzle when it's changed to the maximize height of the water. can someone help me?