The external region of the Sun that tends to be pink is the
A) photosphere.
B) chromosphere.
C) mesosphere.
D) corona.
Answer: B
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Suppose the Sun were to suddenly shrink in size but its mass remained the same. According to the law of conservation of angular momentum, what would happen?
A) The Sun's angular size in our sky would increase. B) The Sun's rate of rotation would slow. C) The Sun's rate of rotation would remain the same. D) The Sun rate of rotation would increase.
A beam of white light goes through dispersion in a prism. The color that bends the most is
A) violet. B) yellow. C) red. D) orange. E) green.
Which of the following is true?
1.A moving car with constant acceleration can never stop and stay stopped. 2.If a car is traveling eastward, its acceleration is eastward. 3.If a car is slowing down, its acceleration must be negative. 4.If a car is speeding up, its acceleration must be greater than zero.
By what factor is the self-inductance of a solenoid changed if only its cross-sectional area, A, is doubled?
a. 1/2 c. 2 b. 4 d. 8