Physics, 11.12.2019 05:31 keidyhernandezm
Asystem does 1.80×10^{8}j of work while 7.50×10^{8}j of heat transfer occurs to the environment. what is the change in internal energy of the system assuming no other changes (such as in temperature or by the addition of fuel)? (answer in ×10^{8}j)
Answers: 1
Physics, 22.06.2019 10:30
Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.
Answers: 2
Physics, 22.06.2019 16:30
A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.
Answers: 2
Physics, 22.06.2019 17:00
Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.
Answers: 3
Asystem does 1.80×10^{8}j of work while 7.50×10^{8}j of heat transfer occurs to the environment. wha...
History, 26.03.2020 03:32
Mathematics, 26.03.2020 03:32
Mathematics, 26.03.2020 03:32
History, 26.03.2020 03:33