What is the direction of the angular momentum vector for a wheel spinning as shown below?
A. Upward
B. Downward
C. Clockwise
D. Counterclockwise
A. Upward
Physics & Space Science
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In order of visual luminosity at the start, which is most luminous?
A) a red supergiant B) a planetary nebula C) a nova D) a type I supernova E) a type II supernova
Physics & Space Science
Intensity: The amplitude of the electric field for a certain type of electromagnetic wave is 570 N/C. What is the amplitude of the magnetic field for that wave? (c = 3.00 × 108 m/s)
A. 2.91 µT B. 1.90 µT C. 1.10 µT D. 1.41 µT E. 2.41 µT
Physics & Space Science
About how many stars are visible to the naked eye on a clear, dark night away from city lights?
A) a few dozen B) a couple thousand C) several million D) a few hundred billion
Physics & Space Science
What evidence is there linking the Crab nebula to a supernova?
What will be an ideal response?
Physics & Space Science