Physics, 01.12.2020 01:30 gimpypeach
Shown in the diagram a 4800 kg cable cars descending a Highhill a counterweight of mass 4600 kg on the other side of the hill age the brakes in controlling the cable car speed the Rolling friction of both the cable car and the counterweight are negligible  how much braking force does the cable car need to descend constant speed
Answers: 1
Physics, 22.06.2019 01:30
Which example has gravitational potential energy? a.a horse slowing down from a run b.an apple about to fall from a tree branch c.a bicycle being pedaled down a horizontal path d.beaker sitting on the floor
Answers: 1
Physics, 22.06.2019 01:30
Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.
Answers: 1
Physics, 22.06.2019 06:30
Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?
Answers: 1
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
Shown in the diagram a 4800 kg cable cars descending a Highhill a counterweight of mass 4600 kg on t...
Mathematics, 06.11.2021 04:10
Physics, 06.11.2021 04:10
History, 06.11.2021 04:10
Mathematics, 06.11.2021 04:10
Physics, 06.11.2021 04:10
Physics, 06.11.2021 04:20
History, 06.11.2021 04:20
Medicine, 06.11.2021 04:20
History, 06.11.2021 04:20