Purpose: To determine the period and the frequency of a recording timer.

Material: Recording timer, power supply, ticker tape, carbon disc, stopwatch

Data: Number of dots produced on the ticker tape = 188 Time interval = 3.0 s

Interpretations and Analysis: Answer the following questions with full explanations:

1. Calculate the frequency and the period of the recording timer.

2. Using your answer(s) from above, determine the time interval represented by six dots f f f f

3. In this investigation, the dots on the tape were equally spaced. What does this indicate?

4. a. Suppose the experiment was performed again by pulling the tape through the recording timer at a slightly faster (yet still constant) rate. Would this affect the frequency and the period of the timer that you determined in question #1? Explain.

b. How would the dots produced on this tape differ from those on the original tape?

5. Predict some problems that you might encounter if you were to: a. pull the tape too quickly through the timer.

b. pull the tape too slowly through the timer.