6. At t = 0, the switch is closed in the circuit shown below. Calculate:
(a) The current in the circuit at t=0
(b) The potential difference across L at t=0
(c) The rate of change of the current (i. e. di/dt) at t=0
(d) Find the steady state current

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.

What kind of simple machine is a catapult?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.