The universe is only seconds old, a million trillion seconds in fact. In powers of 10, this number is
A) 1015.
B) 1017.
C) 1019.
D) 1021.
E) None of the above.
E
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A pulsar with a pulse period of only a few milliseconds is referred to as a dotted pulsar
Indicate whether the statement is true or false
Refer to the sketch above of an H-R diagram for a star cluster. What is the age of the cluster?
A) Less than 1 billion years B) About 1 billion years C) About 2 billion years D) About 10 billion years E) More than 15 billion years
Relative to some reference frame in the universe, you may now be traveling at a speed
A) faster than the speed of light. B) slower than the speed of light. C) at the speed of light. D) any of the above
A spaceship, traveling at 0.560c towards a stationary space platform, launches a secondary towards the station with a speed of 0.100c relative to the spaceship. What is the speed of the secondary rocket relative to the space platform?
A) 0.460c B) 0.575c C) 0.600c D) 0.625c E) 0.660c