Which of the following is a likely outcome of a failed experiment?
a. a scientist will give up and quit.
b. a scientist will gain valuable information.
c. a scientist will alter data to support their hypothesis.
d. a scientist will do a different experiment.

after you conduct a scientific investigation and analyze your results, what should you do with the information you have obtained?
a. keep it to yourself
b. secure your data so no one else can see it
c. report your findings and let others learn from your work
d. alter your data to support your hypothesis

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.

Quantum mechanics applies to subatomic, atomic, nanometer-size, and micrometer-size systems. nanometer, micrometer, and kilometer-size systems. atomic, nanometer-size, and micrometer-size systems. subatomic, atomic, and nanometer-size systems.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.