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An angler hangs a 4.52-kg fish from a vertical steel wire 1.65m long and 5.47×10?3cm2 in cross-sectional area. The upper end of the wire is securely fastened to a support.
1. Calculate the amount the wire is stretched by the hanging fish.
2. The angler now applies a force F? to the fish, pulling it very slowly downward by 0.525mm from its equilibrium position. For this downward motion, calculate the work done by gravity.
3. For this downward motion, calculate the work done by the force F? .
4. Calculate the work done by the force the wire exerts on the fish.
5. Calculate the the change in the elastic potential energy (the potential energy associated with the tensile stress in the wire).
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An insulated Thermos contains 145 cm3 of hot coffee at 89.0 °C. You put in an 11.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted and equilibrium is reached? Treat c..
Computing the kinetic energy, takeoff speed, and kinetic energy per kilogram.
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