An air-filled cylindrical inductor has 2800 turns, and it is 2.9 cm in diameter and 28.5 cm long table part a what is its inductance? express your answer to two significant figures and include the appropriate units, nl ha value units l= request answer submit part b how many tums would you need to generate the same inductance if the core were filled with iron of magnetic permeability 1200 times that of free space? express your answer using two significant figures ? να ασφ turns n

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.