# How things work college course/Quantum mechanics timeline/Quiz

1 Excepting cases where where quantum jumps in energy are induced in another object (i.e., using only the uncertainty principle), which would NOT put a classical particle into the quantum regime?

 high speed confinement to a small space low speed low mass

2 What are the units of Plank's constant?

 mass x velocity x distance energy x time momentum x distance all of the above none of the above

3 What are the units of Plank's constant?

 mass x velocity energy x time momentum x distance x mass all of the above none of the above

4 How would you describe Old Quantum Theory

 complete and self-consistent complete but not self-consistent self-consistent but not complete neither complete nor self-consistent

5 The first paper that introduced quantum mechanics was the study of

 light electrons protons energy

6 What are examples of energy?

 ${\displaystyle {\frac {1}{2}}mv^{2}}$ mgh where m is mass, g is gravity, and h is height heat all of the above

7 What are examples of energy?

 ${\displaystyle {\frac {1}{2}}mv}$ momentum heat all of the above

8 What was Plank's understanding of the significance of his work on blackbody radiation?

 he was afraid to publish it for fear of losing his reputation he eventually convinced his dissertation committee that the theory was correct the thought it was some sort of mathematical trick he knew it would someday win him a Nobel prize

9 What was "spooky" about Taylor's 1909 experiment with wave interference?

 The light was so dim that the photoelectric effect couldn't occur The light was dim, but it didn't matter because he was blind. The light was so dim that only one photon at a time was near the slits. The interference pattern mysteriously disappeared.

10 How does the Bohr atom differ from Newton's theory of planetary orbits?

 The force between proton and electron is not attractive for the atom, but it is for planets and the sun. The force between planets and the sun is not attractive for the atom, but it is for proton and electron. planets make elliptical orbits while the electron makes circular orbits electrons make elliptical orbits while planets make circular orbits