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  1. Practice problem

    A pressure disturbance has a bulk elastic response →

    Intermediate · Connect concepts. What is the speed of a small-amplitude sound wave?

  2. Practice problem / FREE SAMPLE

    A puck slows on a rough table →

    Intermediate · Connect concepts. Friction gives constant deceleration μkg while the puck slides.

  3. Practice problem

    A pull partly lifts the load →

    Intermediate · Connect concepts. Find its horizontal acceleration.

  4. Practice problem

    A quarter wavelength of extra travel →

    Intermediate · Apply a principle. Find their phase-difference magnitude on arrival.

  5. Practice problem

    A radius law used for an area →

    Intermediate · Compare cases. Find the ratio of geometric cross-sectional areas, area216/area64.

  6. Practice problem / FREE SAMPLE

    A ray crosses into glass →

    Intermediate · Apply a principle. The larger refractive index makes the angle smaller, so its sine must be below one half.

  7. Practice problem

    A return trip separates displacement from distance →

    Intermediate · Read graphs & measurements. What is the average velocity from 0 s to 5 s?

  8. Practice problem

    A scale during downward acceleration →

    Intermediate · Compare cases. Find the scale reading in newtons.

  9. Practice problem

    A shorter lap changes the acceleration →

    Intermediate · Compare cases. Find the ratio of new radial acceleration to old radial acceleration.

  10. Practice problem

    A sideways component cancels →

    Intermediate · Apply a principle. Find the magnitude of their net force.

  11. Practice problem

    A sloping line needs both area and endpoints →

    Intermediate · Read graphs & measurements. What heat enters along A → B?

  12. Practice problem

    A slow envelope from two nearby tones →

    Intermediate · Apply a principle. How many beats per second are heard?

  13. Practice problem

    A small mirror turn changes the reflected ray →

    Intermediate · Compare cases. Find the magnitude of the reflected ray’s angular turn.

  14. Practice problem

    A small piston drives a large one →

    Intermediate · Apply a principle. Find the supported force at the large piston.

  15. Practice problem

    A smaller but hotter emitter →

    Intermediate · Connect concepts. Find the ratio of B’s total emitted power to A’s.

  16. Practice problem

    A speed curve’s height needs its bin width →

    Intermediate · Read graphs & measurements. Approximately how many molecules lie in that interval?

  17. Practice problem

    A speedometer meets the SI system →

    Beginner · Apply a principle. Express its speed in m/s.

  18. Practice problem

    A stack carries one zero offset →

    Intermediate · Apply a principle. What is the inferred average sheet thickness?

  19. Practice problem

    A steady surface can keep transferring heat →

    Intermediate · Find a missing quantity. What exposed area does this model require?

  20. Practice problem

    A string point moves differently from the wave →

    Intermediate · Compare cases. Find a string point’s maximum transverse speed.