A simple spring is used to measure force. The spring is

Sears and Zemansky's University Physics with Modern Physics 13
Problem 83P Visitors at an amusement park watch divers step off a platform 21.3 m (70 ft) above a pool of water. According to the announcer. the divers enter the water at a speed of 56 mi/h (25 m/s). Air resistance may be ignored. (a) Is the announcer correct in this claim? (b) Is it possible for a

Fundamentals of Statistics 4
Problem 17AYU Marriage Obsolete? According to a study done by the Pew Research Center, 39% of adult Americans believe that marriage is now obsolete. (a) Suppose a random sample of 500 adult Americans is asked whether marriage is obsolete. Describe the sampling distribution of , the proportion of ad

Organic Chemistry 3
(a) Draw all stereoisomers of molecular formula C7H15Cl formed when (3S)-3-methylhexane is heated with Cl2. (b) Assuming that products having different physical properties can be separated by fractional distillation, how many different fractions would be obtained? (c) How many fractions would be opti

Krugman's Economics for AP® (High School) 2
A country can produce either 100 bushels of wheat or 150 units of textiles, as shown on the graph above. If an advance in technology affects only the production of textiles, what happens to the slope of the production possibilities curve and the opportunity cost of wheat? Slope Opportunity cost of wh

Principles of Economics 6
Consider the following cost information for a pizzeria: Quantity Total Cost Variable Cost 0 dozen pizzas $300 $ 0 1 350 50 2 390 90 3 420 120 4 450 150 5 490 190 6 540 240 a. What is the pizzerias fixed cost? b. Construct a table in which you calculate the marginal cost per dozen pizzas using the inf

Chemistry: Principles and Reactions 8
A solution is prepared by dissolving 12.15 g of nickel(II) nitrate in 175 mL of water (d 5 1.00 g/mL). Calculate (a) the mass percent of nickel(II) nitrate in the solution. (b) the mole fraction of nickel(II) ions in the solution.

Plant Systematics 3
What is the difference between parallel and penni-parallel? Between pinnate-netted, palmatenetted, and ternate-netted?

Biochemistry 9
Can prokaryotes deal with drastic DNA damage in ways that are not available to eukaryotes?