An electron in a hydrogen atom makes a transition from the n = 3 to the n = 1 energy state. Determine the wavelength of the emitted photon (in nm)
a. 1006
b. 209
c. 306
d. 103
e. 821
d
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Compared to Earth, Venus spins very rapidly
Indicate whether the statement is true or false
The ________-year solar cycle is characterized by a variation in the number of sunspots through a reversal of the magnetic polarity of the Sun as a whole
A) 2 B) 10 C) 11 D) 22 E) 44
When a negative charge is released and moves along an electric field line, it moves to a position of
a. lower potential and lower potential energy. b. lower potential and higher potential energy. c. higher potential and lower potential energy. d. higher potential and higher potential energy. e. decreasing magnitude of the electric field.
Two speakers in an automobile emit sound waves that are in phase at the speakers. One speaker is 40 cm ahead of and 30 cm to the left of the driver's left ear. The other speaker is 50 cm ahead of and 120 cm to the right of the driver's right ear. Which of the following wavelengths is(are) in phase at the left ear for the speaker on the left and the right ear for the speaker on the right?
a. 10 cm b. 20 cm c. 650 cm d. All of the wavelengths listed above. e. Only the wavelengths listed in (a) and (b).