Which of the following statements is/are true?
A. The total mechanical energy of a system, at any one instant, is either all kinetic or all potential energy.
B. The total mechanical energy of a system is equally divided between kinetic and potential energy.
C. Mechanical energy can be dissipated to nonmechanical forms of energy.
D. The total mechanical energy of a system is constant only if conservative forces act.
E. The total mechanical energy of a system is constant only if nonconservative forces act.

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

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.