The force an ideal spring exerts on an object is given by Fx = -kx, where x measures the displacement of the object from its equilibrium (x = 0) position. If k = 60 N/m, how much work is done by this force as the object moves from x = -0.20 m to x = 0?

a. -1.2 J
b. +1.2 J
c. +2.4 J
d. -2.4 J
e. +3.6 J


B

Physics & Space Science

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Determine the magnitude of the Burger’s vector in MgO, shown in Figure 3.10, that has the NaCl crystal structure with a lattice parameter of 0.4212 nm, and compare the magnitude of this Burger’s vector to that of copper. Note that the Burger’s vector is in the [110] direction in MgO.

What will be an ideal response?

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The compound BeF2 is named ______________

Fill in the blank(s) with correct word

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By convention, the direction of current in a circuit is

A) from the positive terminal of a source to the negative terminal. B) the direction in which positive charge flows. C) both of these D) neither of these

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How did Galileo know that the planets go around the sun rather than around Earth?

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Physics & Space Science