Practice Quiz

Praxis II Physics Content Knowledge Exam Prep - Question List

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31.

What is the mathematical product of mass and velocity of a moving object?

  1. Deceleration
  2. Acceleration
  3. Momentum
  4. Speed
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32.

What is a lever?

  1. A rigid bar that revolves around a fixed point
  2. The pivot point between force and resistance
  3. The distance from the axis to the resistance
  4. A force that overcomes gravity around the base of support
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33.

How many meters is equivalent to 36.2 inches?

  1. 1435 meters
  2. 1.0 meters
  3. 0.72 meters
  4. 0.92 meters
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34.

What is 81kg in pounds?

  1. 23 pounds
  2. 36.8 pounds
  3. 178.2 pounds
  4. 190 pounds
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35.
A student is investigating factors that affect the strength of an electromagnet. The student proposes the following design.

Factors: Voltage, number of turns of wire.
Process: Set voltage to 2.0 V, wrap 50 turns of wire around an iron coil. Measure how many paper clips the magnet can pick up. Set voltage to 4.0 V and wrap 30 more turns of wire. Again measure the number of paper clips. Repeat several times.

Which of the following is the most significant problem with this experimental design?
  1. Not accounting for the resistance of the additional length of wire.
  2. Using paper clips to measure the strength of the electromagnet.
  3. Using increments of 2.0 V instead of 1.0 V.
  4. Changing the values of two factors at the same time.
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