Physics, 28.06.2019 15:00, birdman37361
Select to show the energy of pendulum 1. be sure that friction is set to none. drag the pendulum to an angle (with respect to the vertical) of 30∘, and then release it. when the pendulum is at−30∘, what form(s) of energy does it have?
Answers: 3
Physics, 22.06.2019 03:50, cyberdac01
Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.
Answers: 1
Physics, 22.06.2019 07:30, anonymous1813
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
Select to show the energy of pendulum 1. be sure that friction is set to none. drag the pendulum to...
Mathematics, 05.12.2019 07:31
Mathematics, 05.12.2019 07:31
Mathematics, 05.12.2019 07:31
Mathematics, 05.12.2019 07:31
Mathematics, 05.12.2019 07:31