Why does Earth have so little carbon dioxide in its atmosphere compared to Venus?
A) Earth once had a lot of carbon dioxide, but it was lost to space during the heavy bombardment early in our solar system's history.
B) Chemical reactions turned Earth's carbon dioxide into nitrogen.
C) Earth has just as much carbon dioxide as Venus, but most of it is locked up in carbonate rocks rather than being free in the atmosphere.
D) Earth's volcanoes outgassed far less carbon dioxide than those on Venus.
C
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A camera lens has a focal length of 50.0 mm and an aperture setting of f/4.00. What is the aperture diameter of this lens?
A) 14.2 mm B) 13.6 mm C) 10.1 mm D) 12.5 mm E) 15.0 mm
Theory predicts that neutron stars may not exceed 3 solar masses
Indicate whether the statement is true or false
How fast must a spaceship travel to make the trip to a star 400. LY away in 25.3 years of astronaut travel time?
A) 0.966c B) 0.998c C) 0.829c D) 0.987c E) 0.992c
In the double-slit experiment, the entire matter field or EM field instantaneously collapses to the single interaction point when the field interacts with the screen. This is an example of
A) quantum annihilation. B) quantum tunneling. C) quantum uncertainty. D) quantum interference. E) quantum nonlocality.