_____ says that the amount of energy flowing out of the top of a layer in the star must be equal to the amount of energy coming in at the bottom, plus whatever energy is generated within the layer
A) The law of energy equilibrium
B) The law of conservation of energy
C) Mass-energy equivalence
D) Newton's law of energy transfer
B
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Unpolarized light passes through three polarizing filters. The first one is oriented with a horizontal transmission axis, the second filter has its transmission axis 25.7° from the horizontal, and the third one has a vertical transmission axis
What percent of the light gets through this combination of filters? A) 92.4% B) 50.0% C) 0.00% D) 7.6%
The direction cosines of the vector (4i - 8j + 7k) are:
(A) (0.35, 0.81, -0.23) (B) (0.52, 0.48, -0.21) (C) (20.38, 0.21, -0.26) (D) (0.35, -0.70, 0.62)
Approximately how long does it take light to travel across the diameter of the Milky Way?
A) 27,000 years B) 100,000 years C) 200,000 years D) 1 million years
A chair is placed on a rug. Then a book is placed on the chair. The floor exerts a normal force
A. on all three. B. only on the book. C. only on the rug. D. upwards on the rug and downwards on the chair. E. only on the objects you have defined to be part of the system.