What do we call the tendency of a body at rest to remain at rest or a body in motion to remain in motion?
A. gravity
B. inertia
C. the tendency of a person to stay in bed in the morning
D. the "action-reaction" law
Answer: B
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What value of n corresponds to a wavelength of 922.7 nm in the Paschen series?
A) 3 B) 15 C) 9 D) 5 E) 7
What is Hawking radiation?
A) a hypothesized way for black holes to gradually shrink in mass B) a type of high-energy radiation that comes from inside a black hole's event horizon C) a type of radiation coming from objects supported by degeneracy pressure D) a type of radiation that we have detected so far only with infrared telescopes in space
It took two centuries for the Copernican model to replace the Ptolemaic model because:
A) in Copernicus' time, there were no telescopes. B) the Church wouldn't let anyone talk about Copernicus' model for 200 years. C) there was no scientific evidence to support either model until Galileo made his observations. D) the Ptolemaic model was simpler and more aesthetically pleasing. E) the Copernican model required complicated new terms to explain it correctly.
1.0 kilometer equals ___________ nanometers.
a. 
b. 
c. 
d. 