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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)
A 1kg ball is dropped from the top of a cliff and falls with a constant acceleration due to gravity. Assume that effects of air resistance can be ignored.
The coordinates for station A are 1023.34 N and 988.56 E. What are the northing and easting coordinates for station B that is located 40 feet due east of A, and 22.32 feet due south of A
A MIPS-based computer system with 2 GB of main memory that is built on a single circuit board. It is designed with a single control signal between the CPU chip and main memory, i.e. one bit of control that is set to one for Read operations
Inital Cost=$40,000, Estimated Salvage Value (@ year 5)=18,000, Actual Salvage Value (@ yr.5)=20,000, Depreciation: Straight-Line (No half -year convention), Life=5yrs, Annual Benefit=10,000, and tax rate=34%.
World population reacted 4billion in 197 Use the doubling time approximation (3.5) to estimate the exponential rate of growth that would produce those numbers. Use the exponential growth equation (3.6) to find the growth rate
Tabulate station elevations for a 200-ft equal-tangent parabolic curve with g1= -1.25%, g2= +1.25%, VPI station = 146+00, and VPI elevation = 1,895.00 ft. Compute values if stakeout is at 30-ft increments. Check by second differences
What is the velocity of an electron that falls through a magnetic field aligned electric potential of volts across an accelertion region that is 10 k long
what would be better a truss with all 60 angles or a truss with a 30 60 90 angle for a bridge design what would be the best design
The frame ACD is hinged at A and D and is supported by a cable that passes through a ring at B and is attached to hooks at G and H. If the tension in the cable is 1125 N (thus 1125 N in section BG and 1125 N in section BH)
Calculate the overall modulus of the composite, explaining your calculations and the assumptions you have made when it is loaded:
A block of material A is placed in closed contact with unlimited supply of material B, after 15 hours at temperature T1, it is observed that atoms of B have penetrated 0.5mm into material A.
A spherical tank is being designed to hold 7 moles of methane gas at a pressure of 8 bar and a temperature of 50oF. Determine the volume of the spherical tank to be used.
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