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# practice+problems+oct+28 - e Pulleys f Unlike charges g Two...

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Using the graph of the magnitude of the force versus x given below, estimate the amount of work required to take a particle from x1=1 m (at rest) to x2=2 m (at rest). The area of an ellipse is ab/4 where a and b are the lengths of the largest and smallest diameter of the ellipse, respectively. |F| (N/m) 10 5 X 1 X 2 x (m) 3) The Lennard-Jones (pair-wise) potential is useful for describing: (Circle all that apply) a. Neutral, closed-shell, symmetric atoms b. Like charges c. Polar molecules d. Liquid Nitrogen e. Pulleys
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Unformatted text preview: e. Pulleys f. Unlike charges g. Two masses connected by a spring 1. A solid substance has a structure that allows each atom to have 6 nearest neighbors (called simple cubic packing: 4 nearest neighbors in the same plane, one above, and one below). Calculate the bond energy for 2 moles of this solid. Refer to PE (r) plot for more information. The vertical scale of the graph is in units of 10-21 Joules. Briefly comment whether your estimation of bond energy is an underestimation, overestimation, or neither. Explain....
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