A skater rotates quickly on the ice. He pushes his arms out. What happens to his angular speed?
1.It increases.
2.It decreases.
3.It stays the same.
4.It is impossible to determine.
2
Physics & Space Science
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The ____ of an object depends on the diameter of the object and the distance to the object
a. apparent brightness b. apparent magnitude c. zenith d. angular diameter e. color
Physics & Space Science
Most stars in our part of the Galaxy are formed:
A) alone. B) in open clusters of a few dozen. C) in associations of thousands of stars across a spiral arm of the Galaxy. D) in globular clusters of millions of stars. E) in a singular event just after the Big Bang.
Physics & Space Science
The amount of current in a CFL rated 23W 120V is about
A) 0.2A. B) 5.2A. C) more than 5.2A.
Physics & Space Science
The Huygens probe is an example of which kind of robotic spacecraft?
A) orbiter B) sample return C) lander D) flyby
Physics & Space Science