What is the composition of the clouds of Venus?
A) Water, like Earth's clouds
B) Frozen carbon dioxide, as on Mars
C) A combination of ammonia and methane, like Uranus
D) Sulfur and sulfuric acid droplets
E) Hydrogen sulfide and ammonia
D
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What kind of thermal radiation does Earth emit?
A) infrared light B) visible and ultraviolet light C) infrared and visible light D) infrared, visible, and ultraviolet light E) visible light
The focal lengths of the objective lens and the eyepiece in a microscope are 2.90 mm and 2.50 cm, respectively. An object is placed 3.00 mm from the objective
The image of this object is viewed with the eyepiece adjusted for minimum eyestrain for persons with a near point of 25 cm. What is the distance between the objective and the eyepiece? A) 9.9 cm B) 9.0 cm C) 15 cm D) 11 cm E) 13 cm
In the afternoon, the decibel level of a busy freeway is 80 dB with 100 cars passing a given point every minute. Late at night, the traffic flow is only 8 cars per minute. What is the late-night decibel level?
a. 77 dB c. 70 dB b. 74 dB d. 69 dB
What is cation exchange capacity?
What will be an ideal response?