Under what conditions will a converging (convex) lens produce a real image?
A converging lens forms a real image when the object distance is greater than the
focal length.
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Consider the person described in problem N3T.6. The person’s trajectory will look most like which of the following? (The dot shows the person’s position at t = 0 and east is to the right and north to the top.)
A. A
B. B
C. C
D. D
E. E
F. F
Dmitri places one end of a copper rod in a heat reservoir and the other end in a heat sink. By what factor is the rate of heat flow changed when the temperature difference between the reservoir and sink is tripled?
a. 0.33 b. 1/9 c. 3.0 d. 9.0
A point source emits sound with a power output of 100 watts. What is the intensity (in W/m2) at a distance of 10.0 m from the source?
a. 7.96 × 10^?2 b. 7.96 × 10^?1 c. 7.96 × 10^0 d. 7.96 × 10^1 e. 7.96 × 10^?3
Why is there a maximum vibration of the air molecules at the open end of a resonance tube?