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| By Donna Ingusan
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Donna Ingusan
Community Contributor
Quizzes Created: 2 | Total Attempts: 35,533
Questions: 9 | Attempts: 197

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Physics Quizzes & Trivia

This quiz will test you knowledge about the said topic. Hope you'll have a great time answering it and looking at your test result afterwards. GOOD LUCK!


Questions and Answers
  • 1. 

    Who developed Bernoulli’s principle?

    • A.

      Daniel Bernoulli

    • B.

      Daniell Bernoulli

    • C.

      Daniele Bernoulli

    • D.

      David Bernoulli

    Correct Answer
    A. Daniel Bernoulli
    Explanation
    Daniel Bernoulli developed Bernoulli's principle.

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  • 2. 

    Bernoulli’s Principle states that:

    • A.

      As the speed of a moving fluid increases, the pressure within the fluid decreases.

    • B.

      As the speed of a moving fluid decreases, the pressure within the fluid also decreases.

    • C.

      As the speed of a moving fluid increases, the pressure within the fluid also increases.

    • D.

      None of the above

    Correct Answer
    A. As the speed of a moving fluid increases, the pressure within the fluid decreases.
    Explanation
    Bernoulli's Principle states that as the speed of a moving fluid increases, the pressure within the fluid decreases. This is because as the fluid moves faster, it has to travel a longer distance in the same amount of time, causing the fluid particles to spread out and exert less force on the surrounding area. This decrease in pressure is what allows airplanes to fly and water to flow through pipes.

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  • 3. 

    What state of matter does Bernoulli’s Principle apply to?

    • A.

      Gas only

    • B.

      Liquid or gas

    • C.

      Liquid only

    • D.

      None of the above

    Correct Answer
    B. Liquid or gas
    Explanation
    Bernoulli's Principle applies to both liquids and gases. It states that as the speed of a fluid increases, its pressure decreases. This principle is based on the conservation of energy and can be used to explain various phenomena such as lift in airplanes, the flow of blood in arteries, and the operation of atomizers and carburetors. Therefore, the correct answer is "Liquid or gas."

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  • 4. 

    Water circulates throughout a house in a hot-water heating system. If water is pumped out at a speed of 0.50 m/s through a 4.0 cm diameter pipe in the basement under a pressure of 3.0 atm, what will be the flow speed and pressure in a 2.6 cm diameter pipe on the second floor 5.0 m above? Assume pipes do not divide into branches.

    • A.

      2.5 x 105N/m2

    • B.

      1. 5 x105 N/ m2

    • C.

      2.5 x 103 N/m2

    • D.

      None of the above

    Correct Answer
    A. 2.5 x 105N/m2
    Explanation
    Solution:
    First calculate the flow speed on the second floor, calling it v2, using the equation of continuity. We can call the basement point 1.
    v2 = (v1A1) / (A2) = (v1π(r1)2) / (π(r2)2) = (0.50 m/s)(0.020 m)2 / (0.013 m)2 = 1.2 m/s
    To find pressure, we use Bernoulli’s equation:
    P2 = P1 + ρg(h1– h2) + ½ρ((v1)2 – (v2)2)

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  • 5. 

    What is the lift (in newtons) due to Bernoulli’s principle on a wing of area 86 m2 if the air passes over the top and bottom surfaces at speeds of 340 m/s and 290 m/s, respectively?

    • A.

      F=2.99 x 106 N

    • B.

      F=1.25 x 105 N

    • C.

      F = 1.7 x 106 N

    • D.

      None of the above

    Correct Answer
    C. F = 1.7 x 106 N
  • 6. 

    Water at a gauge pressure of 3.8 atm at street level flows in to an office building at a speed of 0.06 m/s through a pipe 5.0 cm in diameter. The pipes taper down to 2.6cm in diameter by the top floor, 20 m above. Calculate the flow velocity and the gauge pressure in such a pipe on the top floor. Assume no branch pipe and ignore viscosity.

    • A.

      P2 = 3.28 x 105 Pa

    • B.

      P2 = 1.28 x 105 Pa

    • C.

      P2 = 2.8 x 105 Pa

    • D.

      P2 = 2.8 x 103 Pa

    Correct Answer
    C. P2 = 2.8 x 105 Pa
    Explanation
    Solution:
    By continuity equation:
    v2 = (A1v1) / A2 = (π (5.0 / 2)2 (0.60) ) / ( π (2.6 / 2)2)

    v2 = 2.2 m/s
    By Bernoulli’s Equation:
    P1 + ρgh1 + ½ρ(v1)2 = P2 + ρgh2 + ½ρ(v2)2 (Po = atmospheric pressure)

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  • 7. 

    If a fluid enters one end of a pipe at a certain rate, then fluid must also leave at the same rate.

    • A.

      TRUE

    • B.

      FALSE

    Correct Answer
    A. TRUE
    Explanation
    This statement is based on the principle of conservation of mass. According to this principle, the mass of a closed system remains constant over time, meaning that the amount of fluid entering a pipe must be equal to the amount of fluid leaving the pipe. Therefore, if a fluid enters one end of a pipe at a certain rate, it must also leave at the same rate.

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  • 8. 

    It is the mass of fluid per second that flows through a tube.

    • A.

      Volume flow rate

    • B.

      Mass flow rate

    • C.

      Fluid flow rate

    • D.

      Fluid density

    Correct Answer
    B. Mass flow rate
  • 9. 

    It is the volume of fluid per second that flows through a tube.

    • A.

      Fluid density

    • B.

      Mass flow rate

    • C.

      Volume flow rate

    • D.

      Mass flow rate

    Correct Answer
    C. Volume flow rate

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  • Current Version
  • Mar 17, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 25, 2009
    Quiz Created by
    Donna Ingusan
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