Consider a horizontal pipe line of 50 cm2 cross-sectional area that carries a fluid of unknown density at a speed of 3.0 m/s. This pipe feeds a smaller pipe of cross section 25 cm2. If the pressure difference between the two sections of pipe is 9000 Pa, find the density of the fluid.

Write maxwell's equations and discuss the terms involved and the results of each equation in classical electrodynamics. if it is possible to write these equations in integral form, give the integral forms. find the wave equation for electromagnetic waves from the maxwell equations. what is the propagation velocity of electromagnetic waves in space according to the wave equation you find?

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

An electron is traveling with initial kinetic energy k in a uniform electric field. the electron comes to rest momentarily after traveling a distance d. (a) what is the magnitude of the electric field