Which are true of "Richter" or "Local" magnitude calculations?
A. use a nomograph to relate distance, magnitude, and amplitude
B. most commonly used
C. use maximum S-wave amplitude on a seismogram
D. All of these are true.
Answer: D
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A convergent boundary is usually associated with which physical features?
A) Rift valleys B) Volcanic arcs C) Horizontally displaced rocks D) Submarine trenches E) Volcanic arcs and submarine trenches
Saline solutions (NaCl in water) used to deliver intravenous drugs are 0.89%(w/v). What mass of NaCl is found in 500. mL of such a solution?
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A polar jet is a belt of winds about 600 miles wide, flowing as fast as ________ in its central "core."
A. 400 km/hr B. 4 km/hr C. 40 km/hr D. 4,000 km/hr E. half of the speed of light