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A small blimp is temporarily moored where in DC and the centerline of AB are coplanar. A force F from wind, weight, and buoyancy is shown acting at the centerline of the blimp. If F = 5i+ 10 j + 18 k kN What are the moment vectors from F about A, B, and C ?
A farmer wants to irrigate a piece of land in 15 hrs. The area of the field is 15 acres. the farmer grows alfalfa that requires 3.5 inches of water during the 15 hours.At what flow rate should the farmer pump the water
The 25mm thick strut shown below is glued to the horizontal member along surface AB. The glue can resist a shear stress of 600 kPa before failing, and the horizontal member can resist a normal stress of 2000 kPa before a bearing failure occurs.
At what speed the rule of 25 feet separation between two cars is safe?
It is required to dewater a construction site 80 m by 80 m. The bottom of the construction will be 1.5 m below the initial water surface elevation of 90 m. Four pumps are to be used in 0.5-m diameter wells at the four corners of the site.
A wood cube with 9 inch sides is inserted into water. The specific gravity of wood is 0.60. What force will need to be applied to the block downward to hold the wood cube completely submerged in water
The ball at A is kicked such that theta=30 degrees. If it strikes the ground at B having coordinates x=15 ft, y= -9ft, determine the speed at which it is kicked and the speed at which it strikes the ground.
A loose, uncompacted sand fill 6 ft in depth has a relative density of 40%. Laboratory tests indicated that the minimum void ratios of the sand are 0.46 and 0.90, respectively. The specific gravity of solids of the sand is 2.65.
The supplier says it would prefer to sell the company a 65% NaOH solution and the company says the water content is immaterial as long as the equivalent costs are the same including freight.
The overpass structure is to be level, centered 26 feet above the railroad, and 180 feet long. How much existing highway (in feet) must be reconstructed to provide appropriate vertical alignment
A barge measures 10 ft (depth) by 35 ft by 120 ft and weighs 100 U.S. tons. The barge floats in fresh water (specific weight = 62.4 lb/ft3) and is evenly filled with 38,000 bushels of corn (60 lb/bushel).
A small truck is to be driven down a 4% grade at 70mi/hr. The coefficient of road adhesion is 0.95, and it is known that the baking efficiency is 80% when the truck is empty and decreases by one percentage point for every 100 lb of cargo added.
Water is flowing at a depth of 10 ft with a velocity of 10 ft/s in a channel of rectangular section. Find the depth and change in water surface elevation caused by a smooth upward step in the channel bottom of 1 ft.
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