Your '' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.

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5.78 cycles, 354.4 cm, 60.96 cm, 2.05 m/s

10.75 cycles, 389.8 cm, 30.48 cm, 3.78 m/s

16.6 cycles, 425.28 cm, 5.08 cm, 6.80 m/s

350 cm

This data shows that the cycles per second increased as the tension of the string increased. These numbers where obtained by taking ten/time to complete one cycle, and then I did distance/#cycles/s then / 100 to get it into m/s for wave speed.

The distance from the bottle to the candle 96.52 cm and the distance from the bottle to the book is 5.84 cm and the bottle is 10.16 cm in diameter. I got these by lighting the candle and placing it at a distance, then measuring, then I moved the book back and forth in order to see when it was the most focused.

** Your calculation of wave speed based on the count of cycles is not bad, though I believe there is one flaw.

However you need to do an independent measurement of pulse speed, actually timing pulses in the indicated manner.

Please take a few minutes to do this, insert your information into a copy of this document, and resend. **

The distance between the bottle and the candle is now 24.13 cm. Now the book to the bottle is 10.7 cm

Distances from light to bottle 17.78 cm, bottle to book is 13.2 cm,

Distance from light to bottle 12.7 cm, bottle to book is 17.2 cm,

At a distance of 6.35 cm of the light to the bottle, I could no longer get a good vertical line.

1 hour

Very good. Please get the required additional information on pulse speed and respond as indicated.