Which of the following is the formula of the pyrophosphate ion?

A) PO43-
B) HPO42-
C) P2O72-
D) P2O74-


D

Environmental & Atmospheric Sciences

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What is the angle of the sun in Toronto, Ontario (latitude 44°N) on December 21?

A. 16.5° B. 18.5° C. 20.5° D. 22.5°

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According to Newton's Law of Inertia, the result of walking around much of the day is similar to tightening the head of a hammer when its handle hits a solid surface so that we are actually a little bit shorter in the

A) morning. B) evening. C) no difference, really

Environmental & Atmospheric Sciences

________ growth rate describes a predictable rate of change at discrete points in time.

A. Overshoot B. Exponential C. Geometric     D. Feedback E. Logistic

Environmental & Atmospheric Sciences

Which continent has more than 12,000 cubic kilometers of water available per year?

-Australia -North America -Asia -Europe -Africa -South America

Environmental & Atmospheric Sciences