2. Ideal single-phase step-down transformer U1 / U2 = 2400/120V. The machine is connected to the grid electricity with a voltage of 2.6 kV. From the sine shape at this time the steel core is  = 0.09sin314tWb.
Determine the number of loops of the primary and secondary wires

Amanometer is used to measure the air pressure in a tank. the fluid used has a specific gravity of 1.25, and the differential height between the two arms of the manometer is 34 in. if the local atmospheric pressure is 12.7 psia, determine the absolute pressure in the tank for the cases of the

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage