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Physics — Intermediate

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IntermediateScience
Today's questions

Today's quiz questions

These are the questions that make up today's quiz. Test your knowledge, see how much you know, and learn from the explanation behind every answer.

  1. 1.What is Pascal's law?

    • •Pressure applied to an enclosed fluid is transmitted equally in all directions
    • •Fluid flows faster through narrower pipes
    • •The pressure of a gas increases with temperature at constant volume
    • •Fluid pressure decreases with depth

  2. 2.What is refraction?

    • •The spreading of a wave after passing through a narrow opening
    • •The bouncing of a wave off a surface
    • •The splitting of white light into its component colors
    • •The bending of a wave when it enters a medium with different speed

  3. 3.What is the Coriolis effect?

    • •The apparent deflection of moving objects due to Earth's rotation
    • •The increase in wind speed at higher altitudes
    • •The bending of light near massive objects
    • •The gravitational pull of the Moon on ocean tides

  4. 4.What is angular momentum?

    • •The rotational equivalent of linear momentum
    • •The speed at which an object spins
    • •The force needed to start an object rotating
    • •The angle through which an object has rotated

  5. 5.What is the Bernoulli principle?

    • •In a flowing fluid, higher velocity means lower pressure
    • •The density of a fluid increases as it flows faster
    • •Fluid pressure is equal in all directions at a given depth
    • •Fluids always flow from high to low elevation

  6. 6.What is the principle of superposition for waves?

    • •Waves can only pass through each other if they have the same frequency
    • •Waves always cancel each other when they meet
    • •When two waves meet, their displacements add
    • •A wave's speed doubles when two waves combine

  7. 7.What is the half-life of a radioactive substance?

    • •The time for a substance to lose half its radioactive energy
    • •Half the time it takes for a substance to become non-radioactive
    • •The time required for all atoms to decay to half their original mass
    • •The time for half the atoms in a radioactive sample to decay

  8. 8.What is the boiling point of water at sea level?

    • •90 °C
    • •100 °C
    • •110 °C
    • •120 °C

  9. 9.What is the second law of thermodynamics?

    • •Heat always flows from cold to hot objects
    • •The entropy of a closed system tends to increase over time
    • •At absolute zero, a perfect crystal has zero entropy
    • •Energy cannot be created or destroyed

  10. 10.What is centripetal force?

    • •The inward force required to keep an object moving in a circular path
    • •The gravitational force between two rotating bodies
    • •The force that slows down rotating objects
    • •The outward force felt by an object moving in a circle