Water is forced out of a fire extinguisher by air pressure as in the figure. if the pressure of the air in the bottle is pg above atmospheric pressure, the density of water is ρw, and the height of the nozzle above the water level is h, what is the speed v, of the water coming out of the nozzle?

State the right hand rule of the direction of magnetic field in a conductor carrying current

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?