What do we mean by the straightest possible path between two points on Earth's surface?
A) a path that actually is a perfectly straight line
B) a path that follows a circle of latitude
C) a path that follows a circle of longitude
D) a path that crosses the equator
E) the shortest path between the two points
E
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The radiation emitted from a star has a maximum intensity at a wavelength of 300 nm. What is the temperature of this star?
a. 300 K b. 100 K c. 900,000,000 K d. 90,000 K e. 10,000 K
Which of the following has the highest frequency?
a) Ultraviolet b) Microwaves c) X-rays d) Radiowaves
Suppose we represent Earth with a basketball. On this scale, most of the air in Earth's atmosphere would fit in a layer that is ________
A) about an inch thick B) about 6 inches thick C) about the thickness of a sheet of paper D) about a half-inch thick
A particle of kinetic energy 50 eV in free space travels into a region with a potential well of depth 40 eV. What happens to its wavelength?
A) It remains the same. B) It increases in the region of the well. C) It decreases in the region of the well. D) It cannot be determined from the information given.