Physics, 10.09.2019 17:30 isabelperez063
Hot air enters a rectangular duct (20cm wide, 25cm high, and 5m long) at 100 kpa and 60 degrees c at an average velocity of 5 m/s. while air flows the duct, it gets cool down (loses energy) so that air leave the duct at 54 degrees c. determine the rate of heat loss from the air under steady condition
Answers: 3
Physics, 21.06.2019 21:00, jjxt126
A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.
Answers: 2
Physics, 22.06.2019 21:50, nathaniel12
Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.
Answers: 3
Physics, 23.06.2019 17:10, softballlover487
What groupings on the periodic table are made up of elements that react similarly? groups/families metals, nonmetals, metalloids periods series next question © ask for
Answers: 3
Hot air enters a rectangular duct (20cm wide, 25cm high, and 5m long) at 100 kpa and 60 degrees c at...
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