What is the approximated number of earthquakes detected every year?
a. One million
b. One thousand
c. One hundred
d. A few
Answer: a. One million
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Which of the following conditions will occur when an upper-level low lies directly above a surface low?
A. Thunderstorms will develop. B. A wave cyclone will begin to form. C. The surface low will probably weaken. D. The pressure of the surface low will decrease.
Costa Rica is classified as a(n) ________ economy by the UN
A) low B) lower middle C) upper middle D) high
In the United States many farms are integrated into a large food production industry. This is known as
A) agribusiness. B) commercial farming. C) food processing. D) mechanized farming. E) mixed crop and livestock farming.
The pKa of acetic acid, HC2H3O2, is 4.75. What is the pH of a buffer in which [HC2H3O2] = 0.20 M and [NaC2H3O2] = 2.0 M?
A) 3.75 B) 4.75 C) 5.75 D) 7.00