Brian uses a starter pistol to mark the start of a 100 m sprint. The sound wave
produced by the pistol reflects from a nearby wall, and he hears the echo of the
shot 600 ms (milliseconds) after the pistol was fired. Calculate how far the wall
was from Brian. The speed of sound in air is approximately
Multiple choice
330 m/s.
990 m
0 1,980 m
99 m
198 m
Answers: 2
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Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates
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Answers: 2
Brian uses a starter pistol to mark the start of a 100 m sprint. The sound wave
produced by the pi...
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