In a pool game, the cue ball strikes the 8-ball of the same mass and initially at rest. after the collision, the cue ball moves at 2.80 m/s along a line making an angle of 18.0º with the cue ball’s original direction of motion, and the 8-ball has a speed of 2.20 m/s. what is the angle between the direction of motion of the 8-ball and the original direction of motion of the cue ball?

6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost