Water passes along the hose of diameter 2.5 cm and out through nozzle of end diameter 1 cm at a rate of 2kg/s. Density of water is 1000Kgm-3 (a) Calculate volume flow rate (b) Find speeds of water as it passes through the hose pipe and put of nozzle (c) Calculate rate of change of momentum of...

A helicopter drops a paratrooper carrying a buzzer that emits a 500 Hz signal. A sound receiver on the plane monitors the signal as the paratrooper falls. If the perceived frequency becomes constant at 450 Hz, what is the terminal speed at the paratrooper ? Take the speed sound in air to be 343 m/s...

In synchronized diving, divers remain in the air for the same time. Is this possible if they have different wights?

1. The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.0 10-15 m. The single electron in a hydrogen atom normally orbits the nucleus at a distance of 5.3 10-11 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete hydrogen atom? ...