Which of the following values can be taken by the electron spin quantum number, ms?
A) ±1/2
B) 0
C) ±1
D) ±2
E) ±3
A
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Suppose you measure the brightness and period of a number of Cepheid variable stars in Galaxy A and Galaxy B. You ?nd that all the Cepheid variables in Galaxy A are approximately 25 times as bright (apparent brightness) as Cepheid variables with similar periods in Galaxy B. What can you conclude about the distances of these galaxies?
A) Galaxy A is 25 times as far away as Galaxy B. B) Galaxy A is 5 times as far away as Galaxy B. C) Galaxy B is 25 times as far away as Galaxy A. D) Galaxy B is 5 times as far away as Galaxy A.
Why does Mars have more extreme seasons than Earth?
A) because it is farther from the Sun B) because it has a larger axis tilt C) because it has a much more eccentric orbit D) because it has more carbon dioxide in its atmosphere E) all of the above
A soccer ball is released from rest at the top of a grassy incline. After 8.6 seconds, the ball travels 87 meters and 1.0 s after this, the ball reaches the bottom of the incline
(a) What was the magnitude of the ball's acceleration, assume it to be constant? (b) How long was the incline?
What does the phenomenon of diffraction demonstrate?
A) the wave nature of light B) the polarization of light waves C) the quantization of atomic orbitals D) the particle nature of the photon E) the process of ionization