An imaginary line from one geographic pole to the other along the surface of Earth perpendicular to the equator is called
a. a longitude.
b. a meridian.
c. the International Date Line.
d. a parallel.
b
Physics & Space Science
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Light enters a substance from air at 30.0° to the normal. It continues within the substance at 23.0° to the normal. What is the critical angle for this substance when it is surrounded by air?
A) 53° B) 51.4° C) 36.7° D) 12.6°
Physics & Space Science
The total radiant power emitted by a blackbody is proportional to its _________________ raised to the fourth power
Fill in the blank(s) with correct word
Physics & Space Science
a type of star cluster that contains mostly very old stars is
What will be an ideal response?
Physics & Space Science
What did Einstein show to be equivalent to energy?
A: Light B: Mass C: Protons D: Temperature E: Velocity
Physics & Space Science