The Balmer series in hydrogen
A)
includes the Lyman series.
B)
includes both the Paschen series and the Lyman series.
C)
includes the Paschen series.
D)
has four lines in the ultraviolet.
E)
has four lines in the visible.
E
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A body of permeable rock through which groundwater moves is called
a. an aquifer. b. a water table. c. a porosity level. d. a zone of aeration.
We can see light between the approximate wavelengths of:
a. 400 nanometers and 750 nanometers. b. 4 nanometers and 7.5 nanometers. c. 4000 nanometers and 7500 nanometers. d. 4000 nanometers and 7500 miles. e. 40 nanometers and 750 nanometers.
A lens of focal length 20 cm has an object of height 3.0 cm placed 100 cm in front of it. The image distance in this case is
A) 33 cm. B) 20 cm. C) 25 cm. D) 17 cm. E) -25 cm.
In the topography of the ocean basins, high points such as seamounts and abyssal hills are composed of
A) plutonic rock. B) volcanic rock. C) accumulated sediments washed down from the continents.