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1.Lake Mead has a water surface area of 65,800 hectares. In acertain month the reservoir is full, and the pan evaporation rateis 25 cm. Using a pan coefficient of 0.73, estimate the evaporation volume for the month in m 3.
2.The pedestal supports a load P at its center. If the material has a mass density p, determine the radial dimension r as a function of z so that the average normal stress in the pedestal remains constant. The cross section is circular.
3.Lines of levels were run requiring n instrument strips. Therod reading for each backsight and foresight has a standarddeviation σ. What is the standard deviation in the levelline?
n = 40 , σ = ±0.005
OK. This is what I did.
σ = ± 0.005√40 = ±0.032
Is this correct? If not please point in the right direction.
A 4 X 8-ft solar collector has water circulating through it at the rate of 1.0 gallon per minute while exposed to sunlight with intensity 300 Btu/ft^2-hr.
If the elastic limit of steel is 5.0 10^8 Pa, determine the minimum diameter a steel wire can have if it is to support a 69-kg circus performer without its elastic limit being exceeded.
Biomass is increasingly used as a fuel to produce power and heat. A sugarcane-? processing mill is powered by a biomass power plant with 140 MW of electricity and with 60 MW of heat in the form of steam for sugar extraction from the cane.
What is the highest downward speed (the terminal velocity), in miles per hour, ? At the terminal velocity the downward force (the weight) is equal to the upward force (the aerodynamic drag force).
the water is pumped out of the aquifer at a rate of 2000 gpd, treat it with activated carbon and then put it back into the aquifer. At the flow rate how long until al the PCE is removed, assume carbon removed 100% of the PCE
How many watts of power would it take to heat 1 L of water(weighing 1.0 kg) by 10 degrees Celsius n 1.0 h Assume no heat losses occur, so all of the energy expneded goes into heating the water.
The L bracket shown below is pinned to the ground at point C and attached to a single cable at points A and D that wraps around a frictionless pulley at point B. Determine the forces acting on the bracket at point C and then tension in the cable.
Two vessels are connected to a differential manometer using mercury (s=13.56), the connecting tubing being filled with water. The higher-pressure vessel is 5 ft lower in elevation than the other
The behaviour of structural materials using comparative statement when they are formed into structural member
Air at 20oC and 1atm flows at 20 m/s past the flat plate . A pitot tube placed 2mm from the wall, develops a manometer head h=16mm of Meriam red oil (SG = 0.827), measured relative to atmospheric pressure.
The steel uniform shaft has four pulleys attached to it and frictionless bearings at its ends. The pulley at B is connected to a motor that is driving the system. The other three pulleys are consuming the power delivered by Pb .
If the maximum (total) depth of water that can be accommodated at the weir is 1m and the width of the channel is 4m, determine the crest height of a suppressed weir that should be used to measure the flowrate.
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