1. Rank these electromagnetic waves on the basisof their speed (in vacuum). Rank from fastest to slowest. To rankitems as equivalent, overlap them.
a. yellow light
b. FM radio wave
c. green light
d. X-ray
e. AM radio wave
f. infrared wave
2. Rank these electromagnetic waves on the basisof their wavelength.
Rank from longest to shortest. Torank items as equivalent, overlap them.
a. yellow light
b. FM radio wave
c. green light
d. X-ray
e. AM radio wave
f. infrared wave
3. Rank these electromagnetic waves on the basisof their frequency.
Rank from largest to smallest. Torank items as equivalent, overlap them.
a. yellow light
b. FM radio wave
c. green light
d. X-ray
e. AM radio wave
f. infrared wave

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

In a system, when potential energy decreases, then entropy also decreases. true false

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.