Calculate the work done by the system where a chemical reaction takes place in a container of cross-sectional area 50. 0 cm. As a result of the reaction, a piston is pushed out through 15 cm against an external pressure of 121 kpa.

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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

According to the passage weisers mother could be blamed for