Physics, 26.10.2019 04:43 alexandroperez13
A"synchronous" satellite is put in orbit about a planet to always remain above the same point on the planet’s equator. the planet rotates once every 10.2 h, has a mass of 2.2 × 1027 kg and a radius of 6.99 × 107 m. given: g = 6.67 × 10−11 n m2 /kg2 . calculate how far above the planet’s surface the satellite must be
Answers: 2
Physics, 22.06.2019 03:30
As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.
Answers: 3
Physics, 22.06.2019 10:30
J. j. thomson’s experiment disproved the theory that an atom
Answers: 3
Physics, 22.06.2019 21:30
A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.
Answers: 2
Physics, 23.06.2019 04:31
Ivana walks 2km north then turns around and walks 3km south
Answers: 1
A"synchronous" satellite is put in orbit about a planet to always remain above the same point on the...
Mathematics, 02.06.2021 16:50
Mathematics, 02.06.2021 16:50
Social Studies, 02.06.2021 16:50
Mathematics, 02.06.2021 16:50
English, 02.06.2021 16:50
History, 02.06.2021 16:50
Mathematics, 02.06.2021 16:50
Mathematics, 02.06.2021 16:50
Social Studies, 02.06.2021 16:50
Chemistry, 02.06.2021 16:50
Mathematics, 02.06.2021 16:50
Business, 02.06.2021 16:50