A cart of mass 2m is released from rest and slides from the top of an inclined frictionless plane with height h. Express all answers in terms of the given quantities and fundamental constants. a. Determine the speed of the cart when it reaches the bottom of the incline.

b. After sliding down the incline and across a frictionless horizontal surface, the cart collides with a bumper of a negligible mass attached to an idea spring, which has a spring constant k. Determine the distance x(m) the spring is compressed before the cart and bumper come to rest.

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.

The applied force of 3 washers will increase the applied force on the car to n.

Can anyone plz answer any of these. even if its one it will