Use conservation of energy to find the boxes' speed when box b has fallen a distance of 0. 50 m. Assume a frictionless upper surface.

Factor out the greatest common factor. minus − 14 14p3 plus + 10 10p2 plus + 4 4p

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

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