Recent content by lch20yy

ok i got this ... i got the equation wrong

Homework Statement water in main pipe at the street level is at a gauge pressure of 170 KPa and is moving with neglibible speed. A pipe connected to the main pipe is used to deliver the water to kitchen located on the third floor of a building, at a 15-m height from the street level. what is...

Homework Statement a pistol fires a 3-g bullet with a speed of 400 m/s. the pistol barrel is 13 cm long.(a) how much energy is given to the bullet? (b) what average force acted on the bullet while it was moving down the barrel? (c) was this force equal in magnitude to the force of the...

Homework Statement two students throw identical tennis balls towards a building at the same speed. one ball strikes the wall, bouncing back at half its original speed. the other ball smashes a window and continues in the same direction at half its original speed. did the two tennis balls...

Homework Statement an oil drop carries six electronic charges, has a mass of 1.6 x 10^-12 g, has a mass of 1.6 X10^-12g, and falls with a terminal velocity in air. what magnitude of vertical electric field is required to make the drop move upward with the same speed as it was formerly moving...