Discuss the economies of scale (if any) that apply to building dams
What will be an ideal response?
Each dam is built in place, so that is not a place for economies of scale to act. It is
hard to see, in fact, how economies of scale could possibly work in dam construction.
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Analysis of stellar spectra shows that most stars consist of 71% ________, 27% ________, and a 2% mix of the other elements.
A. hydrogen; helium B. hydrogen; oxygen C. helium; hydrogen D. oxygen; nitrogen
Consider a container of 2.0 g of hydrogen, H2 (one mole). Suppose you removed all the electrons and moved them to the other side of the earth
(Earth's radius is 6380 km, k = 1/4??0 = 9.0 × 109 N ? m2/C2, NA = 6.022 × 1023 molecules/mol, e = 1.60 × 10-19 C) (a) How much charge is left behind after you remove the electrons? (b) What electric force do the protons exert on the electrons after they are separated as described?
Fast moving, turbulent streams are highly erosive, they can
A) carry large sediment particles and a large volume of sediment. B) meander and flood into deltas. C) deposit only fine silts and muds. D) form U-shaped valleys from gullies.
How large a pressure increase (in atm) must be applied to water if it is to be compressed in volume by 1.0%? The bulk modulus of water is 2.0 × 109 N/m2 and 1 atm = 1.0 × 105 N/m2
a. 50 atm b. 100 atm c. 1 100 atm d. 400 atm e. 200 atm