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?
As shown in Figure 3.10 the Burger’s vector is between lattice points in the [110] direction. In the MgO (NaCl) structure there are lattice points at the face centered cubic positions. Thus the Burgers vector goes from 0, 0, 0 to ½, ½, 0. That distance in the in MgO is equal to
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A charge of 5.0 pC is distributed uniformly on a spherical surface (radius = 2.0 cm), and a second charge of -2.0 pC is distributed uniformly on a concentric spherical surface (radius = 4.0 cm). Determine the magnitude of the electric field 3.0 cm from the center of the two surfaces
a. 30 N/C b. 50 N/C c. 40 N/C d. 20 N/C e. 70 N/C
Using Table 11.3, which of the following materials would you conclude have the greatest thermal conductivities?
1.metals
2.gases
3.nonmetals
4.gases and nonmetals
A radiating body originally has a Kelvin temperature To, and its surroundings are at 500K (To > 500K). If the Kelvin temperature of the radiating body is increased to 3To,
the net rate at which the body radiates increases by a factor of 333. What was the original temperature To?
During which of the following processes is latent heat released?
What will be an ideal response?