Practice Quiz

Praxis II Physics Content Knowledge Exam Prep - Question List

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36.
Which of the following guidelines should be followed when keeping a laboratory notebook?
  1. Reorganize the notebook by cleaning up data, notes, and records before each new lab.
  2. Round all data values to two significant figures before recording.
  3. Date and record all procedures, events, and original data in ink to prevent erasures.
  4. Keep a separate notebook to record calculations and sketches.
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37.
Which of the following calculations can be used for curve fitting?
  1. The chi-square distribution.
  2. Least-squares regression.
  3. The correlation coefficient.
  4. The standard deviation of a sample.
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38.
You would like to measure the electric power used by a laptop computer when placed in the low-power mode. Which of the following pairs of meters should be selected for this measurement?
  1. Galvanometer and ammeter.
  2. Galvanometer and ohmmeter.
  3. Voltmeter and ammeter.
  4. Ohmmeter and voltmeter.
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39.
Which of the following experiments led most directly to the quantum theory of light?
  1. Michelson's and Morley's effort to detect the luminiferous ether.
  2. Röntgen's discovery of the emission of X-rays from a vacuum tube.
  3. Planck's analysis of the spectrum emitted by a blackbody.
  4. Hertz's detection of electromagnetic radiation.
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40.
In chemistry, the enthalpy is defined as the heat energy change of a reaction. It is most closely related to which of the following concepts in physics?
  1. The area under a force versus displacement graph.
  2. The slope of the line tangent to a velocity versus time graph.
  3. The area under a force versus time graph.
  4. The slope of the line tangent to a momentum versus time graph.
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