You have a set of 14 metal weights strung together by nylon fishing line at equal intervals. Each has a weight of 0.20 N. You suspend this array from the ceiling and then observe waves travel up and down by shaking it.
The wave seems to move more rapidly at the top, near weights 1-3. This is because
A. gravity is cancelled by tension, so net force is zero.
B. there is more tension in the fishing line near weights 1-3 than down by weight 14.
C. weight 14 is balanced by no other weight, but weight 1 is balance by 13 others below it.
D. the amount of mass per centimeter is higher toward the top, near weights 1-3.
Answer: B
You might also like to view...
Which of the above would best describe how soap behaves in water?
A) a B) b C) c D) d E) none of the above
A series circuit consists of a 50-Hz ac source, a 40-? resistor, a 0.30-H inductor, and a 60-?F capacitor. The rms current in the circuit is measured to be 1.6 A. What is the power factor of the circuit?
A) 0.70 B) 0.56 C) 0.63 D) 0.59 E) 0.66
Two speakers are driven exactly out of phase with each other at 256 Hz. If a microphone is placed on the line between the two speakers exactly in the middle of the line, what is possibly the distance between the microphone and each speaker? The speed of sound is 340 m/s.
A. 0.75 m B. 0.38 m C. Can be any distance at all D. 1.50 m E. 0.94 m
WIMPs are an example of baryonic matter
a. True b. False Indicate whether the statement is true or false