The Ritz combination principle states that the sum of the
A) frequencies of two lines in a spectrum often equal the frequency of a third line.
B) energies associated with two lines in a spectrum often equal the energy associated with a third line.
C) energy transitions of quantum jumps is consistent with the conservation of energy.
D) all of the above
E) none of the above
Answer: D
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A machine puts out 100 watts of power for every 1000 watts put into it. The efficiency of the machine is
A) 10%. B) 50%. C) 90%. D) 110%. E) none of the above
Which one of the following numbers is equivalent to the number 0.0001776?
A) 1.776 × 10-4 B) 17.76 × 10-3 C) 1776 × 10-5 D) 177.6 × 10-7
A rocket ship is 74.0 m in length when measured before leaving the launching pad. What would its velocity be if a ground observer measured its length as 60.0 m while it is in flight? (c = 3.00 × 10^8 m/s)
a. 1.76 × 10^8 m/s c. 1.98 × 10^8 m/s b. 0.980 × 10^8 m/s d. 1.15 × 10^8 m/s
What will you see with the following type of optic: Plano lens
A. Image is smaller |
B. Image is the same |
C. Image is larger |