Physics, 05.07.2019 18:00 Mdaulton1182
To improve the acoustics in an auditorium, a sound reflector with a mass of 170kg is suspended by a chain from the ceiling. what is the tension in the chain? assume that the mass of the chain itself is 8.0kg.
Answers: 1
Physics, 22.06.2019 05:20
Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity
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Physics, 22.06.2019 07:30
Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.
Answers: 3
Physics, 22.06.2019 11:20
How to tell if a molecule is polar or nonpolar with electronegativity
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Physics, 22.06.2019 11:30
If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?
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