Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 3sin(2x)cos(5t), where x is in m and t is in s. What is the wavelength of the interfering waves?
a. 3.14 m
b. 1.00 m
c. 6.28 m
d. 12.0 m
e. 2.00 m
a
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The person who first explained the discrete hydrogen atom spectrum was __________
Fill in the blank(s) with correct word
Which two of the following places are nearest to each other? Place A at latitude 20°N, longitude 90°W Place B at latitude 30°N, longitude 90°W Place C at latitude 30°N, longitude 75°W Place D at latitude 20°N, longitude 75°W
If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?
A) 40 m B) 20 m C) 18 m D) 80 m
Energy Levels: The shortest wavelength of a photon that can be emitted by a hydrogen atom, for which the initial state is n = 12, is closest to which one of the following values? (c = 3.0 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 92 nm B. 82 nm C. 72 nm D. 62 nm E. 52 nm