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Suppose you are to investigate an accident in which a 1300 kg car A struck a parked 1200 kg car B. All four of B’s wheels were locked and skid marks indicate that B slid 2 m after impact. If you estimate the coefficient of kinetic friction between B’s tires and the road to be 0.4 and the coefficient of restitution to be 0.4, what was the velocity of A just before impact. Assume only one impact occurred.
A stone A is dropped from rest down a well, and in 1 second another stone B is dropped from rest. Determine the distance between the stones another second later.
Based on information provided in the survey bulletins and knowing that the landfill is located in the municipality of Duque de Caxias, on the shore of Guanabara Bay opposite Governor's Island (Galeao Airport)
The slope of the channel So=.15% and the Manning n=.038. Estimate the depth y2=100m upstream of a section where the flow depth y1=2.2m Using a) the direct integration method and b) the standard step method.
A hybrid car has a initial cost of $70,000 is to be depreciated by the straight-line method over a six years. The asset will a salvage value of $10,000. According to the straight line method, the book value at the end of year 3 is
The Pomdeterra wastewater treatment plant produces a thick sludge that has a suspended solids concentration of 3.8%. They are investigating a filter press that will yield a solids concentration of 24%.
An engineering student is driving on a level roadway and sees a construction sign 180 m ahead in the middle of the roadway. The student strikes the sign at 56 kph. If the student was traveling at 90 kph when the sign was first spotted, what was th..
A projectile is fired into a block of wood that is hanging on the end of a light rigid rod. How you would estimate the speed of the projectile. What might account for the errors in your estimation.
A result of a 7-day BOD test performed on a sample from anoligotrophic lake was 10 mg/L. The base 'e' BOD rate constantdetermined from previous studies was estimated to be 0.10d-1.
a rectangular clarifier with a lengthwidth ratio of 31 receives a flow of 850m3day. the clarifiers depth is 4.0m and
Determine the inclination θ of the ladder if the coefficient of static friction between the friction pad A and the ground is μs= 0.3. Assume the wall at B is smooth. The center of gravity for the man is at G.
A significant obstacle in the design of atomic weapons is theso-called delta phase instability (a type of mixed dislocation) inPu-239. This is the problem: We wish to construct a sphericalatomic bomb core out of pure delta phase (f.c.c.) Pu-239. A de..
A 420 kW pump delivers gasoline at a rate of 1.28 m^3/s through a horizontal pipe. The average roughness height is 0.005 cm. The total length of the pipe is 46 m. Calculate the pipe diameter.
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