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College Physics 1
Problem 20PE At takeoff, a commercial jet has a 60.0 m/s speed. Its tires have a diameter of 0.850 m. (a) At how many rev/min are the tires rotating? (b) What is the centripetal acceleration at the edge of the tire? (c) With what force must a determined 1.0010?15 kg bacterium cling to the rim? (d)

Classical Mechanics 0
Consider a particle of mass in and charge q moving in a uniform constant magnetic field B in the z direction. (a) Prove that B can be written as B= V x A with A = 413 x r. Prove equivalently that in cylindrical polar coordinates, A = 1Bp b. (b) Write the Lagrangian (7.103) in cylindrical polar coordi

Human Anatomy & Physiology 9
Which of the following best defines cellular respiration? (a) intake of carbon dioxide and output of oxygen by cells, (b) excretion of waste products, (c) inhalation of oxygen and exhalation of carbon dioxide, (d) oxidation of substances by which energy is released in usable form to the cells.

Krugman's Economics for AP® (High School) 2
In each of the following cases, state whether the income effect, the substitution effect, or both are significant. In which cases do they move in the same direction? In opposite directions? Why? a. Orange juice represents a small share of Clares spending. She buys more lemonade and less orange juice

Essentials of Statistics for the Behavioral Sciences 10
A researcher is interested in the texting habits of high school students in the United States. The researcher selects a group of 100 students, measures the number of text messages that each individual sends each day, and calculates the average number for the group. a. Identify the population for

Urban Economics 8
Innovation and Market Areas Consider the example shown in Figure 21 . Depict graphically the effects of the following sequence of changes on the martini glass fi gure and the width of a factorys market area. The changes are cumulative. a. An innovation in production that doubles labor productivity in

Principles of Economics 9
In the model of aggregate demand and aggregate supply, the quantity of _________ is on the horizontal axis, and the _________ is on the vertical axis. a. output; interest rate b. output; price level c. money; interest rate d. money; price level

College Physics: Explore and Apply 2
(a) What is the ratio of the gravitational force that Earth exerts on the Sun in the winter and the force that it exerts in the summer? (b) How many correct answers can you give for part (a)? (Hint: Earths orbit is an ellipse with the Sun located at one of the foci of the ellipse. Think about the