Which of the following is not a real difference between asteroids and comets?
A) Asteroids orbit the Sun, whereas comets just float randomly around in the Oort cloud.
B) Most asteroids are located much nearer to the Sun than most comets.
C) It is thought that comets are far more numerous than asteroids.
D) Asteroids are made mostly of rock and comets are made mostly of ice.
A) Asteroids orbit the Sun, whereas comets just float randomly around in the Oort cloud.
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Two children are riding on a merry-go-round. Child A is at a greater distance from the axis of rotation than child B. Which child has the larger tangential speed?
A) Child A B) Child B C) They have the same zero tangential speed. D) They have the same non-zero tangential speed. E) There is not enough information given to answer the question.
When waves from a pair of closely-spaced slits arrive in phase
A) a bright fringe is produced. B) a dark fringe is produced. C) both bright and dark fringes are produced. D) none of the above
Suppose we put a 0.3-kg hunk of ice at 0°C into an insulating thermos bottle filled with 1000 g of water at 20°C. What will be the system’s final temperature?
A. Below 0°C B. Almost exactly 0°C C. Somewhat above 0°C, but below 10°C D. Very roughly 10°C E. Somewhat below 20°C, but above 10°C F. Almost exactly 20°C
How much energy is released when 1.40 ?g of 3H have decayed to 3He? The mass of 3He is 3.016029 u, the mass of 3H is 3.016049 u, and 1 u = 931.494 MeV/c2
A) 23,900 J B) 71,700 J C) 830 J D) 7970 J E) 11,900 J