Measuring Time and Rate in Experiments

Try these questions

5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.

1. 1. Why is it better to time 20 complete oscillations of a pendulum than to time only one oscillation?

   • A. The human reaction time error is spread over a longer total time, so it becomes a smaller fraction of the result
   • B. The pendulum swings faster when it is timed for longer
   • C. The stopwatch becomes more accurate after running for a long time
   • D. The period of the pendulum becomes shorter with more swings

2. 2. A learner times 20 complete oscillations of a pendulum in three trials: 31.8 s, 32.2 s and 32.0 s. Calculate the period T of the pendulum.

   Type your answer (in s) in the lesson.

3. 3. Which of the following shows the correct way to set out a column in a laboratory data table?

   • A. Time / s with the values 16.4, 16.2, 16.6 in the cells
   • B. Time with the values 16.4 s, 16.2 s, 16.6 s in the cells
   • C. Time / s with the values 16.4, 16.20, 16.6 in the cells
   • D. Time with the values 16.4, 16.2, 16.6 in the cells

4. 4. Wanjiku counts 18 heartbeats at her radial artery in exactly 15 seconds. What is her pulse rate in beats per minute?

   Type your answer (in bpm) in the lesson.

5. 5. What name is given to the time taken for one complete oscillation of a pendulum?

   Type your answer in the lesson.

More in Laboratory Apparatus & Instruments

• ▸Measuring Length and Area
• ▸Measuring Mass and Weight in the Laboratory
• ▸Measuring Liquid Volume
• ▸Measuring the Volume of Irregular Solids and Calculating Density
• ▸Optical Instruments The Light Microscope
• ▸Operating the Light Microscope
• ▸Electrical Instruments
• ▸Magnetic and Static Electricity Apparatus

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