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Q. Two identical metallic blocks are connected by a light spring having the spring constant 100 N/m and an unstretched length of .30 m. A total charge Q is slowly placed on the system, causing the spring to stretch to an equilibrium length of .40 m. find out the value of Q

Q. Exerting a force of 84 N on the circular piston of a syringe causes a pressure increase in the barrel of 1.3 atm. What is the diameter of the piston?

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