When 25.9 j was added as heat to a particular ideal gas, the volume of the gas changed from 41.0 cm3 to 67.5 cm3 while the pressure remained constant at 1.08 atm. (a) by how much did the internal energy of the gas change? if the quantity of gas present is 1.66 x 10-3 mol, find the molar specific heat of the gas at (b) constant pressure and (c) constant volume.

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.

How many atoms of nitrogen are in the chemical formula ni(w on

What sort of waves exhibit the doppler effect?