When an electric current flows through a wire, the current produces which of the following?
a. a magnetic field
b. mechanical energy
c. a generator
d. a motor

Describe uniform velocity and variable velocity in short

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

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.