Which of the following types of air masses is the coldest of all?
A. mT
B. mP
C. cA
D. cT
Answer: C
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A comet's tail ________.
A. points toward the nearest planet as a result of its gravity B. is a vapor trail behind a comet that points in the direction from which the comet came C. lines up with the solar wind moving outward from the Sun D. is composed of smoke from the burning comet E. always points toward the Sun
What term is used to define money that is sent back to Latin America and the Caribbean from people working temporarily or permanently in other countries?
A) braceros B) caceros C) work fund D) remittances E) none of the above
About how many calories are required to convert 2 g of ice at 0°C to water vapor at 50°C ?
A. 670 B. 2768 C. 160 D. 1180 E. 1340
A hydrogen bond is a special type of
A. dipole-dipole attraction involving hydrogen bound to a highly electronegative atom B. attraction involving any molecules that contain hydrogens C. dipole-dipole attraction involving hydrogen bound to another hydrogen atom D. dipole-dipole attraction involving hydrogen bound to any other atom E. none of the above