Which elements are alkaline earth metals?(a) sodium(b) aluminum(c) calcium(d) barium(e)

Introductory Chemistry 5
How many joules of nutritional energy are in a bag of chips with a label that lists 245 Cal? If 1 lb of fat is stored by the body for each \(14.6\times10^3\mathrm{\ kJ}\) of excess nutritional energy consumed, how many bags of chips contain enough nutritional energy to result in 1 lb of body fat?

College Physics 1
Problem 6CQ Suppose you take two steps A and B (that is, two nonzero displacements). Under what circumstances can you end up at your starting point? More generally, under what circumstances can two nonzero vectors add to give zero? Is the maximum distance you can end up from the starting point A +

Biology 8
\Vhich statement is true of all atoms that are anions? a. The atom has more electrons than protons. b. The atom has more protons than electrons. c. The atom has fewer protons than does a neutral atom of the same element. d. The atom has more neutrons than protons. e. The net charge is 1-.

Biology 8
How do pharyngeal slits function during feeding in lancelets and tunicates?

Campbell Biology in Focus - Standalone book 1
Within six months of effectively using methicillin to treat S. aureus infections in a community, all new infections were caused by MRSA. How can this result best be explained? a. S. aureus can resist vaccines. b. A patient must have become infected with MRSA from another community. c. In response to

Principles of Economics 6
The New York Times reported (Feb. 17, 1996) that subway ridership declined after a fare increase: There were nearly four million fewer riders in December 1995, the first full month after the price of a token increased 25 cents to $1.50, than in the previous December, a 4.3 percent decline. a. Use the

Urban Economics 8
Using Figure 177 as a starting point, suppose the initial utility-maximizing spending on special education is $5 rather than $25. As before, the lump-sum conditional grant for special education is $20. The income elasticity of demand for special education is 1.0. a. Show the response of the median ho

Introductory Chemistry: A Foundation 9
Can the subscripts in a chemical formula be fractions? Explain.