In a few places where the air is very cold in the winter,

Organic Chemistry 2
The following sequence of reactions was performed during a synthesis of (+)-coronafacic acid, a key component in the plant toxin coronatine (J. Org. Chem. 2009, 74, 24332437). Predict the product of this reaction sequence and justify the regiochemical outcome of the second reaction. 1) TsCl, pyridine

Sears and Zemansky's University Physics with Modern Physics 13
In an experiment, a shearwater (a seabird) was taken from its nest, flown 5150 km away, and released. The bird found its way back to its nest 13.5 days after release. If we place the origin in the nest and extend the to the release point, what was the birds average velocity in (a) for the return flig

Myers' Psychology for AP 2
Researchers studying gender have found that a. there are more similarities than differences between the genders. b. there are no significant cognitive differences between the genders. c. there are no significant emotional differences between the genders. d. research tools are not capable of determini

Principles of Economics 6
Pharmaceutical drugs have an inelastic demand, and computers have an elastic demand. Suppose that technological advance doubles the supply of both products (that is, the quantity supplied at each price is twice what it was). a. What happens to the equilibrium price and quantity in each market? b. W

Principles of Economics 6
Compare the quantity and price of an oligopoly to those of a competitive market.

Principles of Biology 2
1. Which is false? a. Graded potentials may die out or trigger an action potential. b. Action potentials arise at the axon hillock and move toward the axon terminals. c. The diameter of an unmyelinated axon is directly related to the speed at which action potentials travel along its length. d. Saltat

Biology for AP Courses
What is the advantage of sexual reproduction? a. Sexual reproduction allows animals to conserve resources and reproduce only during optimal conditions. b. Sexual reproduction results in offspring with diverse phenotypes, which may enhance survival of a population in a changing environment. c. Sexual

Introductory Chemistry: A Foundation 9
A widely used weather instrument called a barometer can be built from a long, thin tube of glass that is sealed at one end. The tube is completely filled with mercury and then inverted into a small pool of mercury. The level of the mercury inside the tube drops initially but then stabilizes at some h