Physics, 30.10.2021 23:00 Savagepanda911
Cosmic background radiation detected in space is believed to be evidence that:
1-The universe began with an explosion
2-The universe is contracting
3-All matter in the universe is stationary
4-Galaxies are evenly spaced throughout the universe
Answers: 2
Physics, 22.06.2019 05:00
Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.
Answers: 1
Physics, 22.06.2019 14:50
Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.
Answers: 2
Cosmic background radiation detected in space is believed to be evidence that:
1-The universe bega...
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