The inflationary theory of the Universe may explain why the background radiation is so isotropic
a. True
b. False
Indicate whether the statement is true or false
True
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The angular sizes of the Sun and Moon are about the same because
A) both objects have the same physical size. B) both objects are located the same distance away. C) the Sun is larger in size than the Moon by the same factor (about 400) that it is farther in distance. D) their angular sizes are an illusion created by the apparent locations on the celestial sphere.
A long thin rod of length L has a linear density ?(x) = Ax where x is the distance from the left end of the rod. (a) How far is the center of mass of the rod from the left end of the rod? (b) What is the mass of the rod?
What will be an ideal response?
Which ray diagram is correct? The three rays in each diagram are distinguished by different types of lines. Hint: Check the behavior of each ray as it interacts with the lens.
A. A B. B C. C D. D E. E
Reverberation can both inhibit conversation and enhance music
a. True b. False Indicate whether the statement is true or false