Physics, 23.09.2019 17:30 genyjoannerubiera
5kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1 to state 2. during this process the specific internal energy changes from u1=2709.9 kj/kg to u2=2659.6 kj/kg. during the process there is a heat transfer to the steam of magnitude 80 kj. also, the paddlewheel transfers 18.5 kj of energy to the steam by work. determine the energy transfer by work from the steam to the piston, in kj.
Answers: 3
Physics, 21.06.2019 13:20
Adouble-slit experiment is performed with light of wavelength 600 nm. the bright interference fringes are spaced 1.8 mm apart on the viewing screen.what will the fringe spacing be if the light is changed to a wavelength of 400 nm? ?
Answers: 1
Physics, 21.06.2019 17:00
Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?
Answers: 1
Physics, 22.06.2019 00:40
The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.
Answers: 1
Physics, 22.06.2019 12:10
Energy flows from the producer level to the level. is called
Answers: 1
5kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1 to stat...
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