Physics, 01.07.2019 19:30 whitethunder05
Two radio antennas a and b radiate in phase. antenna b is a distance of 140 m to the right of antenna a . consider point q along the extension of the line connecting the antennas, a horizontal distance of 30.0 m to the right of antenna b. the frequency, and hence the wavelength, of the emitted waves can be varied.
a)what is the longest wavelength for which there will be destructive interference at point ?
b)what is the longest wavelength for which there will be constructive interference at point ?
Answers: 1
Physics, 22.06.2019 03:30, zahradawkins2007
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, 23.06.2019 01:30, haileysolis5
The flow of electrons from one atom to another is called
Answers: 1
Physics, 23.06.2019 02:30, Andrewecolt1993
Aforce is a vector quantity because it has both?
Answers: 1
Two radio antennas a and b radiate in phase. antenna b is a distance of 140 m to the right of antenn...
Social Studies, 08.12.2021 05:30
Arts, 08.12.2021 05:30
Geography, 08.12.2021 05:30
History, 08.12.2021 05:30