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A test projectile is fired horizontally into a viscous liquid with a velocity ofv0 = 17.0 m/s. The retarding force is proportional to the square of the velocity, so that the acceleration becomesa = -kv2 wherek = 0.047 m-1. Find the distanceD traveled in the liquid and the corresponding timet required to reduce the velocity to 7.8 m/s. Neglect any vertical motion
An engineer in a developing country observes that his project bankaccount has grown from 1,600,000 to 1,769,279 (local currencyunits) in 20 days with no deposits or withdrawals being made.
The footing has a f'c=3000psi. Assume the the footing base is 5 ft below the grade and the soil is 100 lb/ft with an allowable pressure of 4500lb/ft fy=60,000
The kill of pathogens by disinfection in water treatment can be described by a first order reaction. Complete a reactor comparison for a batch reactor, CSTR and PFR for disinfection.
Steam at 800 kPa and 300 C is bled off from a large supply line, passed through a valve, and allowed to enter an initially evacuated, uninsulated tank with a volume of 0.3 m3.
The soil is under a rectangular concrete slab 15m x 50m, used as a foundation for a building. A water pipe, in diameter id located in a trench 450mm below the center of the slab. The trench running along the length of the slab,300mm wide and 450mm de..
The beam is to be hoisted using two chains. Determine the magnitudes of force and acting on each chain in order to develop a resultant force of 500 directed along the positive axis. Set = 41
Over the course of 3days, she added another 6lbs of water and at the end of 3days, there was 67lbs of water remaining. A nearby rain gage recorded 0.4 inches of precipitation over the period.
Head loss and sunshine striking a pipeline cause the temperature of the water flowing inside to rise by 2 degrees Celsius between two measuring points. Find the heat gain in J/N and cal/N.
If the bar is released from rest in the vertical position (θ = 0) derive an expression for the magnitude of the force exerted by the bearing at O on the frame as a function of θ.
Flow of a river at the start of a baseflow recession, on June 11, was 7,555 ft3/s. After 41 days of continuous recession, on July 22, the flow declined to 3098 ft3/s. What is the value of the recession constant and the flow after 80 days of recessi..
Estimate the maximum number of cars per hour that can travel down two lanes of a highway as a function of speed (ie at 50, 60 , and 70 mph) .for safety purposes the cars must be spaced one car length apart for each 10 mph they are traveling.
compute normal and critical depths in a concrete culvert(n=0.015)with a diameter of 36in.and a bed slope of 0.002ft/ft if the design discharge is 15cfs.is the slope steep or mild?reap for S= 0.02ft/ft.
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