In the Bohr theory the orbital radius depends upon the principal quantum number in what way?
A) n
B) 1/n
C) n2
D) 1/n2
E) n3
C
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The index of refraction for a certain material is 1.399 for red light and 1.432 for blue light. Find the angle separating the two refracted colors if the: (a) angle of incidence is 30°. (b) angle of incidence is 60°
What will be an ideal response?
Olbers' paradox is an apparently simple question, but its resolution suggests that the universe is finite in age. What is the simple question posed by Olbers' paradox?
A) Why is the sky dark at night? B) What would it be like to ride on a beam of light? C) How does the Sun produce energy? D) Can we measure the position and momentum of an electron at the same time? E) How many stars are in the universe?
Because of developments of HTML5, which of the following is NOT used today to create web animations?
A. Flash B. CSS3 C. JavaScript D. animation software
Five boys are pushing on a snowball, and each is pushing with a force of 10.0.0 N. However, each boy is pushing in a different direction. They are pushing north, northeast, east, southeast, and south. (Each boy is pushing at an angle of 45.0° relative to his neighbor.) What is the magnitude of the total force on the ball?
a. 0 b. 14.1 N c. 24.1 N d. 11.4 N e. 48.3 N