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The flow rate of a liquid through a 2.0cm radius pipe is 0.0080 m^3/s. the average fluid in the pipe is? i know that Av=volume flow rate for this problem the flow rate is 0.008m^3/s. Do i divide by the radius^2 to get velocity or is there someother equati...

A copper wire with a length 2.0m, cross sectional area 7.1x10^-6 m^2 and young's modulus 11x10^10 N/m^2 has a 200kg load hung on it. What is its increase the length? (g=9.8 m/s^2) im not sure how to start this problem or what equation to use, can some one...