A 60 kg skydiver moving at terminal speed falls 50m in 1 s. What power is the skydiver expending on the air?

how long does it take for the sun to appear to move its own diameter across the sky

In bomb calorimeter, when dry ice is added to warm water, the final mass of the inner cup and remaining water is less than the initial mass of the inner cup and water. Give an explaination.

how does the density of water chang from 0 degree celsius to 30 degrees celsius?

For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound. The period of this sound is 77 ms. Determine the wavelength of the sound. (See Table 16.1 for appropriate constants.

A cord is wrapped around a pulley of mass m and radius r. The free end of the cord is connected to a block of mass M. The block starts from rest and then slides down an incline that makes an angle ! with the horizontal. The coefficient of kinetic friction between block and incline is 7. (a)...

find electric dipole moment of a system which made by superposition of two equal and opposite spherical charge disribution as a cosine function.the centres of the two superimposed sphers are seperated by a small distance.

how to use trigonometry to solve difficult free body diagrams?

A neutral electroscope is charged by induction with a positively charged object. If 3.43 108 electrons flow through the ground wire to Earth and the ground wire is then removed, what is the net charge on the electroscope? Wouldn't the electrons from the earth be attracted to the...

Fissdasfadsf