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1.Two sites are being considered for wind power generation. In the first site, the wind blows steadily at 7 m/s for 3000 hours per year, whereas the second site the wind blows at 10m/s for 2000 hours per year. Assuming wind velocity is negligible at other times for simplicity, determine which is a better site for wind power generation. Hint: note that the mass flow rate of air is proportional to wind velocity.
2.An apple“weighs” 60 grams and has a volume of 75cm3 in arefrigerator that has a constant temperatureof 8 C. What is the apple’s approximate density. List three intensive and two extensiveproperties of this apple. (2.197thS)
The gas flow rate is 1 kg m-2 s-1 of and the water entering is 1.6 kg m-2 s-1. For this system Henry's law holds and ye=1.75x, where ye is the mol fraction of A in the vapour in equilibrium with a mole fraction of x in the liquid.
A proton feels a force of 2.0 micro-Newtons in the negative x-direction when it is moving in the positive y direction with a speed of 2.0 x 107 meters per second.
If the difference in weight between the two baskets must greater than 15 lb they will not have the strength to operate the pulley. The King weighs 195 lb, the princess weighs 105 lb, and the prince weighs 90 lb.
The effluent contains 20 mg/L of solids and 20 mg/L of BOD the biological treatment process produced .32 kg of bacterial solids per kg of BOD removed
Indoor Air quality is greatly affected by Radon, which can cause lung cancer. When we moved to Colorado, we tested the house for Radon and installed a radon mitigation system.
An aluminum link is subjected to axial tension. The loading is limited by the conditions of not yielding and not elongating excessively. The yield limit is satisfied if the stress remains below 50%of the 325M Payield stress.
You arrive at your bus stop at some random point in the cycle, what is your expected wait time, w(t), to board a bus. Be sure to show your work or you will lose points. What is the standard deviation in w(t) given the fact that there is no bus wait..
Biota can uptake and bioconcentrate compounds through vapor phase absorption. For example, leaves exposed to elemental mercury vapors will absorb the mercury into the aqueous phase and the lipid phases of the leaves. Kow for mercury = 4.17.
The maximum flow rate of a standard shower head is about 3.5 gpm and can be reduced to 2.75 gpm by switching to a low-flow shower head that is equipped with flow controllers. Consider a fam- ily of four, with each person taking a 6-minute shower e..
A concentrated downward force of 2000 lb. is located 6' from the left support, and a uniformly distributed load of 200 lbs./lin. ft. begins 6' to the right end of the member. What force must be applied at each connection to maintain equilibrium?
find an expression for the diameter, D, of the droplet, in terms of the specific weight and surface tension, assuming the contact angle just before seperating is zero.
a 10 mm diameter jet of water is deflected by a homogeneous rectangular block (15 mm by 20 mm by 100 mm) that weighs 6 N. Determine the minimum volume flow rate needed to tip the block over
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