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A ball is dropped from a boat so that it strikes the surface of a lake with a speed of 19.5ft/s. While in the water the ball experiences an acceleration of a = 10 - 0.8v, where a and v are expressed in ft/s^2 and ft/s, respectively. Knowing the ball takes 3 s to reach the borrom of the lake, determine (a) the depth of the lake, (b) the speed of the ball when it hits the bottom of the lake.
Why is the ‘time value of money' important for the evaluation of engineering projects? Provide at least one practical example to support your view (max 2 pages)
A Pelton wheel located at an elevation of 200.0 m is sued to extract power from a reservoir at an elevation of 800.0 m. A penstock 1500 m long and 0.8 m in diameter connects the reservoir and nozzle of the Pelton wheel.
Calculate the percipitable water (mm) in a 10-km high standard atmoshperic column if the surface conditions are temperature=20 degrees C, pressure=101.3 kPa and the laspe rate is 6.5 degrees C/km.
if a manometer incline at 45 degrees containing a fluid with specific gravity of a 2.0 using it to measure the pressure in a system, and the fluid levels rise 30 inches. What is the pressure in the system in Lbf/In^2 and H2O
The blower on an air conditioning unit produces 80 cubic feet per minute of air in the ductwork. What is the air flow in cubic meters per hour
Find the expanded depth of the bed after the backwash when initial depth of the bed is 3 ft using given conditions. m = 0.01g/cm/sec, T = 25oC, rs = 2.65, r=1, washrate = 1.5 cm/sec, ks2 = 196.
The beam is fully restrained at both ends but is unbraced along its span. Determine the maximum magnitude of PQ that satisfies the ultimate strength limit state for flexural strength
The grade of the highway, Suppose that a highway rises a distance of 269 feet in a horizontal distance of 2647 feet.
what is the difference between factor of safety in rankine & coulomb in overturning, sliding and bearing capasity ?
Body A and body B are connected by an inextensible cord. If both bodies are released simultaneously from rest, what distance do they move in 3 sec and what is the tension in the cord. The weight of A is 50 lb and the weight of B is 10 lb.
A 230,000-lb space shuttle orbiter touches down at about 220 miles per hour (mph). At 200 mph, its drag parachute is deploys. The wheel brakes are applied at 100 mph until wheel sotp and the drag parachute is jettisoned from the orbiter at 35 mph.
Determine the minimum horizontal force P required to hold the crate from sliding down the plane. The crate has a mass of 70kg and the coefficient of static friction between the crate and the plane is μs = 0.45.
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