Which common gas is less abundant in the top of Saturn's atmosphere, compared to what we observe at Jupiter?
A) methane B) nitrogen C) helium D) hydrogen E) argon
C
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Which ball is more elastic?
A) a common rubber ball B) a steel ball C) both the same
Space telescopes looking for transiting planets look for small drops in brightness; these drops are:
A) less than 10%. B) less than 1%. C) less than 0.01%. D) less than 0.0001%. E) any size.
One long wire carries a current of 30 A along the entire x axis. A second long wire carries a current of 40 A perpendicular to the xy plane and passes through the point (0, 4, 0) m. What is the magnitude of the resulting magnetic field at the point y = 2.0 m on the y axis?
a. 4.0 ?T b. 5.0 ?T c. 3.0 ?T d. 7.0 ?T e. 1.0 ?T
Why are scientists saying that we are entering a new epoch—the Anthropocene epoch?
What will be an ideal response?