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

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science