by Dan | Nov 6, 2023 | Physics
WRITE A RESEARCH PAPER ON WHERE WILL THE WORLD GET ITS ENERGY FROM AFTER FOSSIL FUELS
by Dan | Aug 5, 2023 | Physics
Do Radiofrequency Electromagnetic waves such as Wi-Fi, cellphone, or microwaves cause serious damage to human bodies? Why or why not?
by Dan | Jul 10, 2023 | Physics
Refrigerant R-134a enters the condenser (heat exchanger for rejection) of a heat pump at 700 kPa and 40 °C and a mass flow rate of 0.02 kg/s. It leaves the condenser as saturated liquid at the same pressure. The compressor consumer 1.2 kW power. Determine (a)...
by Dan | Jul 10, 2023 | Physics
In a heat-engine cycle, steam changes from a saturated liquid to a saturated vapor at a constant temperature of 270 °C. The maximum nnssihIP efficiency of the cycle is 40 %. Determine (a) the temperature at which heat is rejected, and (b) the net power output...
by Dan | Jul 10, 2023 | Physics
A Carnot heat engine receives heat at 800 K and rejects the waste heat at 350 K. Seventy five percent of work output from the heat engine is used to power a Carnot refrigerator that removes heat from the -20 °C cold space at a rate of 400 kl/min and rejects...
by Dan | Jul 10, 2023 | Physics
A reversible power cycle operates between two reservoirs at 830 and 25°C. Sixty percent of the work output of the power cycle is used to drive a Carnot heat pump that removes heat from the cold surroundings at 2°C and transfers it to a house maintained at 20°C. If the...
