A 2000 kg elevator with broken cables in a test rig is falling at 4.0 m/s when itcontacts a cushioning spring at the bottom of the shaft. The spring is intendedto stop the elevator, compressing 2.0 m as it does so. During the motion asafety clamp applies a constant 17,000 N frictional force to the elevator. Whatis the necessary spring constant, k

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

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.

Convection occurs when thermal energy is transferred by the movement of