Aconstantly accelerating object will change its velocity by amount in each time interval, and the distance of travel will be directly proportional to the

a.
a different, the square root of the time of travel
c.
the same, the square of the time of travel
b.
a different, 3 times the time of travel
d.
none of the above.

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

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.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two