Sc.6.P.13.1, SC.6.P.13.3
3. Synthesize Information Nancy is sailing
her boat toward Sam'...
Physics, 27.02.2020 00:15 rosie20052019
Sc.6.P.13.1, SC.6.P.13.3
3. Synthesize Information Nancy is sailing
her boat toward Sam's boat at 5 km/h. Nora,
who is just a few meters behind Nancy, is not
moving in relation to Nora. From Sam's point
of view, how is Nora's boat moving?
Answers: 3
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 09:00
Sobre transformações cÃclicas, são feitas algumas afirmações, determine quais estão corretas. i – a variação de energia interna em uma transformação cÃclica é nula; ii – o trabalho, em uma transformação cÃclica, é sempre positivo; iii – ao completar um ciclo, o gás tem a mesma temperatura com a qual começou a transformação; iv – uma transformação cÃclica é, obrigatoriamente, composta de transformações conhecidas, como adiabática, isocórica, etc: a) i e iii b) i e ii c) ii e iii d) i e iv e) iii e iv
Answers: 1
Mathematics, 24.08.2021 19:50
Mathematics, 24.08.2021 19:50
Mathematics, 24.08.2021 19:50
Mathematics, 24.08.2021 19:50
Computers and Technology, 24.08.2021 19:50
Biology, 24.08.2021 19:50
Mathematics, 24.08.2021 19:50
English, 24.08.2021 19:50