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An air bubble of .3 inch diameter is released from the regulator of a scuba diver 100ft below the waters surface. The water temp is 85 degree's F.
What is the diameter of the bubble before it reaches the waters surface.
The compressive strength of concrete has a (population) mean of 2500 psi and a (population) standard deviation of 50 psi. Find the probability that a random sample of n= 5 specimens will have a sample mean strength
Got a dam with a 22m damwall with a 200mm valve at the bottom. The waterlevel is 20m. If I connect a cone type of reducer to reduce the outlet to say 50mm and put the turbine somewhere on the line,
An object is held in the air 30m above ground and released. Assume the drag force due to air resistance is given by Fd = 1.0Vy. What is the mass of the object necessary so that it reaches ground in 3s
two steel spheres 100mm in diameter. Compute gravitational force and the force of mutual attraction F in newtons. the specific weight of steel is 0.284 lb/in^3
a new coal-fired power plant burns 50,000 tons/day of coal with 7% ash and a heating value of 12000 Btu/lbm. Forty percent of the ash drops out of the furnace as slag. Calculate the efficiency rquired of an ESP to remove fly ash
What is the concentration (M) of Al3+ in lake water with pH = 4 assuming the equilibrium below with excess Al(OH)3 (s) The reaction is Al(OH)3 (s) --> Al3+ + 3OH-. pKsp = 32.9.
Five $1,000 bonds having a bond rate of 8% per year payable quarterly are pur chased for $4,940 and kept for 6 years, at which time they are sold. Determine the selling price that yields a 6% effective annual return on the investment.
What percentage removal should be expected for each of the following particle settling velocities in an ideal sedimentation tank: 0.1 mm/s, 0.2 mm/s, 1 mm/s.
The mass of each pulley of the system is 50 kg, and mass of the suspended object A is 160 kg. Determine the force necessary for the system to be in equilibrium? Be sure to draw complete free body diagram(s) for full credit.
You and your friend go into sports bar where a dart throwing competition is going on.you buy m darts at 1 dollar each.you throw these m darts at the board.Of these, N darts hit within the inner circle.
A rectangular gate 6 ft tall and 5 ft wide in the side of an open tank is held in place by the force F as indicated in the figure. The weight of the gate is negligible, and the hinge at O is frictionless.
The angle of the release is 30 degrees. Determine the horizontal distance the shot travels from the point of release to the point where it hits the ground.
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