1. if a waterfall is 100 ft high, estimate the speed of the water when it hits the rocks below.
2. Large rivers have flow rates that are at least 20,000 cubic feet per second.
If a 100 ft high waterfall exists on such a river, and a hydroelectric power plant uses the falling water to generate energy,
what is the maximum possible amount of energy that can be generated per second?
3. The average household consumes about 100 GJ (gigajoules) of energy in one year. What
is the maximum number of households that could be powered by a 100 ft waterfall?
1.
hight = 100 ft
velocity = ( 2*g*h)0.5 =(2*32.2*100)0.5 =80.2496 ft/sec
2.
Q= 20000 ft3/sec
power = ρ * g * h * Q = 62.4*32.2*20000*100 =4018560000 ft.lb/sec =5448435774.45 j/s
3.
energy consumed by house =100 gj in one year =100*109 /3600*24*365 =3170.979 j/s
number of houses = 5448435774.45/3170.979 =1718218 huses anser
1. if a waterfall is 100 ft high, estimate the speed of the water when it...
A hydroelectric power plant has a dam 100 ft high, and water can flow through the dam and water turbines at 1 million lbm per minute over a 60-ft drop. If the turbines can convert the loss in potential energy of the water into electric power at an efficiency of 70%, how much power can the facility produce in megawatts? (Note: 550 ft ·lbf/s = 1 hp = 0.746 kW)
1. When it comes to financial matters, the views of Aristotle can be stated as: a. usury is nature’s way of helping each other. b. the fact that money is barren makes it the ideal medium of exchange. c. charging interest is immoral because money is not productive. d. when you lend money, it grows more money. e. interest is too high if it can’t be paid back. 2. Since 2008, when the monetary base was about $800 billion,...