A student observes that a certain phototube requires 0.25v to serve as stopping potential for light with a wavelength of 5000A°, the stopping potential is 1v. Estimate h/e from the data

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.

How can waves travel through ground?

As the distance from a magnet increases, what happens to the magnet force?