The person who first explained the discrete hydrogen atom spectrum was __________
Fill in the blank(s) with correct word
Neils Bohr
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Consider a two-slit interference experiment like the one shown in figure Q3.7b. The distance between adjacent bright spots in the interference pattern on the screen (A) increases, (B) decreases, or (C) remains the same if, (a) The wavelength of the light increases.
A. increases B. decreases C. remains the same
The faintest star visible to the naked eye has an apparent magnitude of about
A) 6. B) -1. C) 1. D) 0. E) 10.
If a rectangular area is rotated in a uniform electric field from the position where the maximum electric flux goes through it to an orientation where only half the flux goes through it, what has been the angle of rotation?
A) 45° B) 26.6° C) 90° D) 30° E) 60°
Two identical springs with spring constant 50 N/m support a 5.0-N weight as in the picture below. What is the tension in spring A?
?
?
a.
1.45 N
b.
2.50 N
c.
2.89 N
d.
3.75 N
e.
5.00 N