Practice Quiz

MCAS Physics Exam Practice - Question List

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6. A racecar travels at an average speed of 80 m/s in a race. The total distance of the race is 640,000 m.How long does it take the racecar to finish the race?
  1. 800 s
  2. 8,000 s
  3. 6,400,000 s
  4. 51,200,000 s
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7. Electric charges can move most easily on which of the following objects?
  1. glass tubes
  2. metal plates
  3. plastic cups
  4. rubber tires
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8. The potential difference across a resistor is 12 V. When a current of 5 A is flowing through this resistor, what is the power used by the resistor?
  1. 2.4 W
  2. 60 W
  3. 300 W
  4. 1500 W
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9. The molecules in which of the following have the greatest average molecular kinetic energy?
  1. air in a person’s lungs
  2. ice cubes in a glass of iced tea
  3. raindrops collecting in a puddle
  4. water boiling in a pot on a stove
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10. A car with its horn sounding approaches a group of students. Assume the car’s horn produces sound waves with a constant frequency.Which of the following statements bestexplains why the students hear a higher pitch as the car approaches than when it is stopped?
  1. The sound waves increase in speed as the car approaches the students.
  2. The sound waves decrease in speed as the car approaches the students.
  3. The sound waves are heard at a lower frequency as the car approaches the students.
  4. The sound waves are heard at a higher frequency as the car approaches the students.
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