a water reservoir tankof capacity 250m3 is situatedat a height of 20 m from water level. What will be the power of an electric motor to be used to fill the tank in 3 hrs

A stroboscope is set to flash every 8.00 X 10-5 s. What is the frequency of the flashes?     Find the frequency of a tuning fork that takes 2.50 X 10-3s to complete one...

if the distance between the photogates in the diagram is 30 cm, and the times for the photogates are listed as:   blocked 0.000000 unblocked 0.00156 blocked 0.1   calculate...

Saturn orbits the Sun with an orbital radius of 1.43 x 10^12m. Given that the mass of the Sun is 2.0 x 10^30 kg, calculate the period of Saturn's orbit.

I dont have the whole question but i really need to answer this to pass my quiz later.

The mass of the box is 450kg which is drawn at a constant speed along a horizontal surface. The angle between the drawbar and the horizontal surface is 30 degrees. How big is the shear modulus...

A magnetic levitation or maglev train rides rails without touching them. How does this work?  Include the appropriate magnet drawing in your answer.

A meteor with a mass of 58000 kg falls from an radius of 7.1x10^6 m above the surface of the earth.    a) What is the speed of the meteor just before impact with the surface of the...