Which stellar population has highly elliptical orbits?
a. Pop I extreme b. Pop I intermediate
c. Pop II intermediate d. Pop II extreme
d
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Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is halved, then the force will be
A) F. B) 2 F. C) F/2. D) F/4. E) none of the above
A bullet fired horizontally from a rifle begins to fall
A) as soon as it leaves the barrel. B) after air friction reduces its speed. C) neither of these
The pupil of a cat's eye narrows to a slit width of 0.5 mm in daylight. What is the angular resolution of the cat's eye in daylight (? = 500 nm)?
A. 0.01 rads B. 10?5 rads C. 10?3 rads D. 10?4 rads E. 0.1 rads
Suppose an extrasolar planet's orbit around its star is edge-on to our line of sight. How is it detected, and what information can be obtained in this case?
What will be an ideal response?