Ga trough is 32 feet long and a cross section has the shape of an isosceles trapezoid that is 44 feet wide at the top and 40 feet wide at the bottom. the trough is 16 feet deep. if the trough is filled wih water at the rate of 40 feet3/hour, how fast is the water level rising when the water is 12 feet deep?

What is work? how much work is done to move an object 0 meters?

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

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.