questions and answers 6 q and a(2).pdf · frequency suppose the students cut the rope in half. the...

PQ 6

Questions and Answers

Q1

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Q2

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Q2 Continued • Determine the wavelength for each harmonic

on the 12 metre rope. Record the values in the table below.

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• d. What happens to the frequency as the wavelength increases?

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• f. What effect did using a shorter rope have on the wavelength and frequency?

Q3 A standing wave in a rope has 5 nodes and 4 antinodes. The rope is 24.0 metres long and is vibrating at 2.0 cycles per second. What is the speed of the wave? SKETCH THIS FIRST.

The sketch shows 5 dots and 4 loops for a length of 24.0 m. This sketch shows 2 COMPLETE wavelengths, so Λ is 12.0 m. The f is 2.0 Hz, and v = f Λ The final answer is 24.0 m/s.

Q4 A standing wave has 2 nodes and 1 loop in a jump rope that is 8.5 metres long. It is vibrating at 1.5 cycles per second. What is the velocity of the wave?

Q5 Five pulses are generated every 0.100 s in a tank of water. What is the speed of propagation of the wave if the wavelength of the surface wave is 1.20 cm?

Q7

Q7 continued b. How many complete waves are emitted in this time interval?

c. After 0.50 s, how far is the front of the wave from the source of the sound?