The phase angle of an ac circuit is 63°. What is the power factor?
A) 0.45 B) 0.55 C) 0.89 D) 0.11
A
Physics & Space Science
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The critical angle for Lucite is 41.8
What is Brewster's angle for Lucite?
A. 33.7
B. 26.3
C. 48.2
D. 56.3
E. Brewster's angle does not exist for this material
Physics & Space Science
Chromatic aberration affects reflector telescopes
Indicate whether the statement is true or false
Physics & Space Science
White-hot sparks from a fireworks sparkler that strike your skin don't cause injury because
A) they have a low temperature. B) the energy per molecule is very low. C) the energy per molecule is high, but the total energy transferred is small.
Physics & Space Science
A 6.0-kg object exerts a force of 8.0 N on a 2.0-kg object. What is the magnitude of the force on the 6.0-kg object?
Physics & Space Science