Why did the Oso landslide travel so far?
What will be an ideal response?
Liquefaction
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How many atoms are present in a sample of pure iron with a mass of 210 g? (The atomic mass of iron = 56 u and NA = 6.02 × 10^23.)
a. 1.8 × 10^19 c. 2.3 × 10^24 b. 2.3 × 10^28 d. 3.2 × 10^28
One situation in which the law of conservation of energy is violated is
A) near black holes. B) for very fast-moving objects. C) for atomic-sized objects. D) All of the above. E) nonsense--no violations of this law have ever been observed.
Which of the following is not one of the four general themes or "story lines" that underlie this course?
A) energy B) practical "household" science that you can use around your home, your car, etc. C) how we know what we know in science D) comparisons and contrasts between Newtonian and contemporary physics E) the social context of physics
Light incident on a thin film is reflected and transmitted at each surface. Why does a thin film have to be "thin" for an interference pattern to form?
a. Light would not penetrate a thick film. b. The surfaces of the film must be as close to perfectly parallel as possible. Irregularities would be magnified in a thick film. c. The thickness of the film must be less than the wavelength of light. d. Light is not slowed down when it enters into a thin film. e. Light speeds up as it enters a thin film.