Which element is currently used to define the atomic mass unit?

A) hydrogen-1
B) carbon-12
C) oxygen-16
D) none of these


B

Environmental & Atmospheric Sciences

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Explain how, using no meteorological instruments other than your eyes, you could identify the passage of an occluded front.?

What will be the ideal response?

Environmental & Atmospheric Sciences

Which of the following has the lowest boiling point?

A) heptane B) hexane C) octane D) nonane

Environmental & Atmospheric Sciences

In the United States, desertification

A. is not a concern because few people live in the areas at risk. B. can be avoided by more extensive use of ground water. C. is not a concern, because we have few deserts. D. may affect broad areas of the Sun Belt and plains states.

Environmental & Atmospheric Sciences

How much of the total catch is discarded as bycatch for every pound of shrimp caught in the Gulf of Mexico?

a. 10% b. 30% c. 50% d. 75% e. 90%

Environmental & Atmospheric Sciences