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  1. Practice problem

    Combine two momentum directions →

    Intermediate · Connect concepts. Find the speed of the combined body immediately afterward.

  2. Practice problem

    Compare binding per constituent →

    Intermediate · Apply a principle. Find its binding energy per nucleon.

  3. Practice problem

    Compare complete mass totals →

    Intermediate · Connect concepts. Find the reaction Q value.

  4. Practice problem

    Compare complete rest masses in a fission channel →

    Intermediate · Apply a principle. What energy is released in this channel?

  5. Practice problem

    Compare liquid growth with new capacity →

    Intermediate · Apply a principle. What overflow volume does the first-order model predict?

  6. Practice problem

    Compare routes without recalculating stored energy →

    Intermediate · Compare cases. How much greater is QB than QA?

  7. Practice problem

    Compare wavelength and aperture together →

    Intermediate · Compare cases. What is the ratio of B’s Rayleigh angular separation to A’s?

  8. Practice problem

    Compressing a liquid slightly →

    Intermediate · Apply a principle. Find the magnitude of its fractional volume decrease.

  9. Practice problem

    Compression changes the sign of the logarithm →

    Intermediate · Apply a principle. What is the heat Q into the gas?

  10. Practice problem

    Compression is a spatial change of displacement →

    Advanced · Connect concepts. What is the amplitude of its pressure perturbation?

  11. Practice problem

    Connect angular rate, acceleration and displacement →

    Intermediate · Connect concepts. Through what angle does it turn before its angular velocity doubles?

  12. Practice problem

    Conserve angular momentum, then audit energy →

    Advanced · Connect concepts. How much kinetic energy is lost during the collision?

  13. Practice problem

    Cooling slows near room temperature →

    Intermediate · Compare cases. Find its cooling-rate magnitude when it reaches 40°C.

  14. Practice problem

    Cooling without heat exchange →

    Intermediate · Compare cases. Find its final temperature.

  15. Practice problem / FREE SAMPLE

    Correct a vernier reading →

    Intermediate · Read graphs & measurements. Add the fine-scale contribution, then subtract the known positive offset.

  16. Practice problem / FREE SAMPLE

    Correct the whole reading →

    Beginner · Read graphs & measurements. The zero correction applies to the combined reading; it does not change the pitch or least count.

  17. Practice problem

    Count both field boundaries →

    Advanced · Connect concepts. What total heat is generated by complete entry and exit?

  18. Practice problem

    Count carriers crossing the wire →

    Intermediate · Apply a principle. Find the electron drift-speed magnitude.

  19. Practice problem / FREE SAMPLE

    Count curvature before multiplying →

    Intermediate · Compare cases. A factor of two needs a physical explanation: curvature and interface count are distinct.

  20. Practice problem

    Count only the optical path a plate adds →

    Intermediate · Connect concepts. What is the new combined intensity?