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A railroad car that weighs 20,000lb is traveling eastward with a velocity whose magnitude is 5 fps. A second car, on the same track, that weighs 40,000lb is also traveling in an easterly direction with a velocity of 7.81fps. When the cars collided, they became coupled together and then both cars moved with the same velocity. If friction between the cars and the rails is neglected, what were the magnitude and the direction of the velecity of the cars after the collision?
A single crystal of a FCC metal is oriented so that the [001] direction is parallel to an applied stress of 35.0 MPa. Calculate the resolved shear stress acting on the (111) slip plane in the [110], [0-11], [10-1] slip directions.
A clean-earth channel, for which n=0.020, is 6m wide and lies on a slope of 0.005236. Water flows at 30m3/s through the channel and enters a reservoir. The water depth in the channel, just before the entry to reservoir, is 3m.
for sizing the syst em, the mean cell residence time is selected to be 5 days. the reactoer kinetic constants are u max= 2.4 d^-1 (1/day), Ks=75 mg/L as COD, Y=0.4 VSS/g COD and Kd=0.096 d^-1(1/day)
If all trucks travel at a speed v', cars at a speed v, and the fraction of vehicles passing a stationary observer that are trucks is p, what fraction of vehicles would be trucks on a photograph
Why is granular activated carbon(GAC) used to treat the industrial wastewater stream but not the domestic wastewater stream
Determine the surface area of a primary settling tank sized to be handle a maximum hourly flow of 0.570 m3/s at an overflow rate of 60 m/day.If the effective tank depth is 3.0 m
A four-lane freeway is on a mountainous terrain with 11-ft lanes, a 5-ft right-side shoulder, and a 3-ft left side shoulder. During the peak hour there are 12% trucks and buses and 6% recreational vehicles.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid. The static moment of the plate with respect to the surface of the liqui..
A two stage rocket with a total mass of 925kg is traveling at a speed of 6.6 10^3 m/s away from the earth . A predesigned explosion separates into two sections of equal mass that move with a speed of 2800m/s relative to each
Find the minimum flow rate of air and the heat exchanger second-law efficiency.
An element of aluminium in a form of a rectangular parallel pipe has a length 'a' along the x axis of 5.5 in, a length 'b' on the y axis of 4.5 in. Determine the maximum shear stress in the material,the change in length.
The evaporation rate from the surface of a 3650-acre lake is 100 acre-ft/day. Estimate the depth change in the lake in feet during a 1-year period if the net inflow to the lake is 25 cfs. Is the depth increasing or decreasing
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