The speed of an electric signal in a typical circuit is

A. about the speed of light.
B. about the speed of sound.
C. a snail's pace.
D. none of the above


Answer: A

Environmental & Atmospheric Sciences

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Which of the following is true about where earthquakes occur?

A. Deep earthquakes are most common near rising mantle plumes. B. Deep and intermediate-depth earthquakes occur near subduction zones. C. Earthquakes are randomly distributed across most of Earth. D. Earthquakes mostly occur away from plate boundaries.

Environmental & Atmospheric Sciences

Which of the following describes when homogeneous freezing occurs?

A. when water vapour condenses onto hydrophobic nuclei B. when water vapour condenses without nuclei C. when water vapour condenses onto hygroscopic nuclei D. when all the condensation nuclei are exactly the same

Environmental & Atmospheric Sciences

The Amazon River has ________ times as much discharge as the Mississippi River

A) 4 B) 6 C) 8 D) 12

Environmental & Atmospheric Sciences

The primary vertical motion of all ocean water is caused by ________

A) winds B) density C) earthquakes D) currents E) gravity

Environmental & Atmospheric Sciences