(I) (a) Show that one British horsepower (550 ft -lb/s) is

College Physics 1
Problem 25PE A projectile is launched at ground level with an initial speed of 50.0 m/s at an angle of 30.0 above the horizontal. It strikes a target above the ground 3.00 seconds later. What are the x and y distances from where the projectile was launched to where it lands?

Sears and Zemansky's University Physics with Modern Physics 13
Problem 24E A parallel-plate air capacitor has a capacitance of 920 pF. The charge 011 each plate is 2.55 C. (a) What is the potential difference between the plates? (b) If the charge is kept constant, what will be the potential difference between the plates if the separation is doubled? (c) How much

Chemistry 11
The reaction between aluminum and iron(III) oxide can generate temperatures approaching \(3000^{\circ} \mathrm{C}\) and is used in welding metals: \(2 \mathrm{Al}+\mathrm{Fe}_{2} \mathrm{O}_{3} \longrightarrow \mathrm{Al}_{2} \mathrm{

Campbell Biology 10
Population ecologists follow the fate of same-age cohorts to a. determine a populations carrying capacity. b. determine the birth rate and death rate of each group in a population. c. determine if a population is regulated by density-dependent processes. d. determine the factors that regulate the siz

Principles of Economics 6
Why do economists sometimes offer conflicting advice to policymakers?

Concepts of Biology 1
Magnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom? a. It has 12 protons, 12 electrons, and 12 neutrons. b. It has 12 protons, 12 electrons, and six neutrons. c. It has six protons, six electrons, and no neutrons. d. It has six protons, six ele

Essentials of Understanding Psychology 11
Who pioneered the study of conformity? a. Skinner b. Asch c. Milgram d. Fiala

Principles of Economics 9
Are the following workers more likely to experience short-term or long-term unemployment? Explain. a. a construction worker laid off because of bad weather b. a manufacturing worker who loses his job at a plant in an isolated area c. a stagecoach-industry worker laid off because of competition from r