Which of the following is not a dwarf planet?
a. Ceres
b. Mercury
c. Pluto
d. Eris
b
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An electron orbiting a hydrogen atom in the second energy level drops down a level, and a photon is emitted. What is the frequency of the photon? (Planck's constant, h, should be in units of eV.)
The outflow channels on Mars indicate a flood period in the history of Mars. During this time, based on the width and depth of the remaining riverbed, it is thought that the flow rate must have been:
A) just a small trickle, barely more than a stream of water. B) moderate, about the flow rate of the Ohio River. C) fairly large, about the flow rate of the current Colorado River. D) significantly large, about the flow rate of the Amazon River. E) enormous, as much as 100 times the flow rate of the Amazon River.
With which object would the wave nature of matter be significant?
a. A hard-thrown baseball b. A speeding truck c. A moving electron d. An orbiting planet
Advantages gained if a planet can be detected by both methods.
What will be an ideal response?