If a laser printer prints at 600 dots per inch, what is their angular separation when viewed from 40 cm?
a. 
b. 
c. 
d. 
e. 
c.
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The efficiency of a Carnot engine operating between 95°C and 0°C is most nearly
a. 13%. b. 52%. c. 26%. d. 80% e. 100%
Which of the following would NOT cause the gravitational force on an object near Earth's surface to increase?
A. an ore deposit just under the surface B. a lower elevation C. an increase in its mass D. a horizontal velocity
An electric iron uses 8.0 A of current and has a power rating of 1100 W. The resistance of the iron is
A. 138 Ohms. B. 17 Ohms. C. 0.0072 Ohms. D. 8800 Ohms.
When you look at a single-slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the width of the slit is increased,
a. the pattern shrinks in size (central maximum less wide; other maxima in closer to it). b. the pattern increases in size (central maximum wider; other maxima farther from it). c. it does not affect the size of the pattern. d. the width of the central maximum increases, but the other maxima do not change in position or width. e. the width of the central maximum decreases, but the other maxima do not change in position or width.