A Carnot heat engine operates between a source at 1000 K and a sink at 300 K. If the heat engine is supplied with heat at a rate of 800 kJ/min, determine: (a) the thermal efficiency. (b) the power output of this heat .engine

Compare alternative and direct currents by comparing their physical properties. (Explain alternans, cycles, periods, frequency terms during this comparison. Also in this comparison, explain the electron flow directions separately in alternating and direct current)

A coil is made up of 1000 turns of 0.5 mm^2 cross-sectional area copper wire. The average length each turn is 100 cm, and the copper resistivity is 0.02 µΩ m at 20 degrees Celsius. Determine the coil's resistance.   Find the resistance of the coil at 20 degrees Celsius. *   30 ohm 40 ohm 50 ohm 60 ohm   Find the resistance of the coil at 100 degrees Celsius if the temperature coefficient of resistance at 30 degrees Celsius is 3.7807 x 10^(-3) per degrees Celsius *   32.57 ohm 42.57 ohm 52.57ohm 62.57 ohm

can someone help me with this problem and show your work step by step