Chemistry, 16.10.2019 20:00 makyah3683
Consider a combined gas–steam power plant that has a net power output of 450 mw. the pressure ratio of the gas-turbine cycle is 14. air enters the compressor at 300 k and the turbine at 1400 k. the combustion gases leaving the gas turbine are used to heat the steam at 8 mpa to 400°c in a heat exchanger. the combustion gases leave the heat exchanger at 460 k. an open feedwater heater incorporated with the steam cycle operates at a pressure of 0.6 mpa. the condenser pressure is 20 kpa. assuming all the compression and expansion processes to be isentropic, determine (a) the mass flow rate ratio of air to steam, (b) the required rate of heat input in the combustion chamber, and (c) the thermal efficiency of the combined cycle.
Answers: 3
Chemistry, 22.06.2019 13:00, rome58
Lab reagent, hypothesis test. a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl. these six measurements are assumed to be an srs of all possible measurements from solution. they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution. carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.
Answers: 1
Chemistry, 22.06.2019 19:40, trodgers0202
Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests. which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory
Answers: 3
Consider a combined gas–steam power plant that has a net power output of 450 mw. the pressure ratio...
Mathematics, 04.11.2021 04:30
Mathematics, 04.11.2021 04:30
Mathematics, 04.11.2021 04:30
Mathematics, 04.11.2021 04:30
Social Studies, 04.11.2021 04:30
Mathematics, 04.11.2021 04:30
Mathematics, 04.11.2021 04:30