A force of 13 Newton exerted to move a crate at a constant speed to a distance of five meters on a level road. How much work its done? If the force is applied a horizontally, and B at an angle of 25 degree with B for zontal Your given a force of 300 newton and the distance of 5 meters and your going to find the work done horizontally and the work done on an angle of 25 with the horizontally 35 degress today horizontally

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.

Atomic nuclei of almost all elements consist of

What is the relationship between the direction of motion of the balloon and the wind currents