If a galaxy is moving away from us at 1.0% of the speed of light, how far away is it from us?
A)
14 ly
B)
140 ly
C)
140 thousand ly
D)
140 million ly
E)
140 billion ly
D
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A baseball is thrown by the center fielder (from shoulder level) to home plate where it is caught (on the fly at an equal shoulder level) by the catcher. At what point is the ball's speed at a minimum? Note: Air resistance is negligible
a. just after leaving the center fielder's hand b. just before arriving at the catcher's mitt c. at the top of the trajectory d. speed is constant during entire trajectory
100 coins, each with a Head and a Tail, are tossed randomly onto a table. A microstate is defined as the number of Heads that appear after the toss. What is the value for the number of Heads that has the most number of microstates?
A. 95 B. 75 C. 60 D. 50
Which of the following is the most abundant element in the Universe?
A) Nitrogen B) Oxygen C) Carbon D) Hydrogen
If the dust around a protostar radiates most strongly at 30 microns or 30,000 nm, what is the approximate temperature of that dust? Hint: T in K = 3,000,000/wavelength in nm or use Wien's Law
a. 100,000 K b. 10,000 K c. 1000 K d. 100 K e. 10 K