The Crab Pulsar has a period that is currently of length 33.085ms. It is estimated to have an equatorial radius of 15km, about average for a neutron star. The pulsar is slowing in its rotation so that it is expected to come to rest 
s in the future. What is the angular acceleration in this situation?
A. 
B. 
C. 
D. 
E. 
D.
Physics & Space Science
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Significant Figures: A train travels at a constant speed of 60.4 mi/h for 101.5 min. What distance does the train cover expressed to the correct number of significant figures?
A. 100 mi B. 102 mi C. 102.2 mi D. 102.18 mi E. 102.181 mi
Physics & Space Science
The largest volcano on Earth is a
A) shield volcano. B) cinder cone. C) composite cone. D) lava plateau.
Physics & Space Science
Astronomers estimate the total number of comets in the solar system to be about
A) 100 million. B) 1 billion. C) 10 billion. D) 100 billion. E) 1 trillion.
Physics & Space Science
If a cup of tea at room temperature, 24°C is heated until it has twice the internal energy, unlike a piece of metal, its temperature will be
A) 48°C. B) 100°C. C) 321°C. D) 594°C. E) none of the above
Physics & Space Science