A student performing an experiment about the melting point of an object. After 5 trials he found the melting point to be 192 oC, 206 oC, 197 oC, 199 oC, and 202 oC. The accepted melting value temperature is 200 oC. Calculate the percent error.

Aregular polygon has angkes of size 150° each.how many side has the polygon

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

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.