A photon that is emitted during a transition in hydrogen from the n = 27 state to the n = 2 state is in which of the following series?
A. Lyman
B. Balmer
C. Paschen
D. Brackett
E. All of these choices are correct.
B. Balmer
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Which is the correct format for a scientific name?
a. Homo Sapiens b. Homo Sapiens c. homo sapiens d. Homo sapiens e. Homo sapiens
A motorcycle daredevil wants to ride up a 50.0 m ramp set at a 30.0° incline to the ground. It will launch him in the air and he wants to come down so he just misses the last of a number of 1.00 m diameter barrels. If the speed at the instant when he leaves the ramp is 60.0 m/s, how many barrels can be used?
a. 79 b. 318 c. 332 d. 355 e. 402
A hollow conducting sphere of radius 12 cm had a charge of 18 
C placed on it. What is the potential 20 cm from the center of the sphere?
A. 0 V
B. 15 V
C. 73 V
D. 
E. 
The longest-daylight day for people in the Northern Hemisphere at latitudes greater than 30°N occurs at the
a. summer solstice. b. vernal equinox. c. winter solstice. d. autumnal equinox.