Aplumber is hired to plumb a house that has been renovated. in doing so the length of the pipe from the water heater to the bathroom is quadrupled. in order to maintain the same conductance to the bathroom that the original pipes (of radius r) had, what radius of pipe should the plumber use compared to the original pipes? ½ r ¼ r 2r 4r

An automobile of mass 2000 kg moving at 30 m/s is braked suddenly with a constant braking force of 10000 n. how far does the car travel before stopping?

Why don't you see your reflection in water with waves or repples

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?