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Contents - Lessons & Practice

Science

Physics

OpenStax book

OpenStax

Physics

23 lessons

One lesson for each chapter of Physics, in the book’s order. The lesson teaches what that chapter says you need to know, then checks it.

  1. 1What is Physics?Modern physics involves the theory of relativity, which describes how time, space and gravity are not constant in our universe can be different for different observers, and quantum mechanics, which describes the…
  2. 2Motion in One DimensionAverage speed is a scalar quantity that describes distance traveled divided by the time during which the motion occurs
  3. 3AccelerationThe kinematic equations in this section are valid only for constant acceleration
  4. 4Forces and Newton’s Laws of MotionDynamics is the study of how forces affect the motion of objects and systems
  5. 5Motion in Two DimensionsNext, use the head-to-tail method as for vector addition to obtain the resultant vector R
  6. 6Circular and Rotational MotionThe angle of rotation Δ θ is defined as the ratio of the arc length to the radius of curvature
  7. 7Newton's Law of GravitationNewton’s law of universal gravitation provides a mathematical basis for gravitational force and Kepler’s laws of planetary motion
  8. 8MomentumImpulse is the average net external force multiplied by the time this force acts, and impulse equals the change in momentum, Δ p = F net Δ t
  9. 9Work, Energy, and Simple MachinesThe work-energy theorem states that an amount of work that changes the velocity of an object is equal to the change in kinetic energy of that object.The work-energy theorem states that an amount of work that changes…
  10. 10Special RelativityOne postulate of special relativity theory is that the laws of physics are the same in all inertial frames of reference
  11. 11Thermal Energy, Heat, and WorkHeat is transferred by three different methods: conduction, convection, and radiation
  12. 12ThermodynamicsThe zeroth law of thermodynamics states that when two systems, A and B, are in thermal equilibrium with each other, and B is in thermal equilibrium with a third system, C, then A is also in thermal equilibrium with C
  13. 13Waves and Their PropertiesMechanical waves must travel through a medium
  14. 14SoundSound intensity level in decibels (dB) is more relevant for how humans perceive sounds than sound intensity (in W/m 2 ), even though sound intensity is the SI unit
  15. 15LightCalculations can be based on the relationship among the speed, frequency, and wavelength of light, and on the relationship among luminous flux, illuminance, and distance
  16. 16Mirrors and LensesThe angle of reflection equals the angle of incidence
  17. 17Diffraction and InterferenceCharacteristics of diffraction patterns produced with diffraction gratings can be determined
  18. 18Static ElectricityObjects can be charged in three ways: by contact, by conduction, and by induction
  19. 19Electrical CircuitsDirect current is constant over time; alternating current alternates smoothly back and forth over time
  20. 20MagnetismA charged particle moving through a magnetic field experiences a force whose direction is determined by the right-hand rule
  21. 21The Quantum Nature of LightThe maximum kinetic energy KE e of ejected electrons (photoelectrons) is given by K E e = h f - B E , where hf is the photon energy and BE is the binding energy (or work function) of the electron in the particular…
  22. 22The AtomDescribed as an electron cloud, the quantum model of the atom is the result of de Broglie waves and Heisenberg’s uncertainty principle
  23. 23Particle PhysicsThere are three types of fundamental particles—leptons, quarks, and carrier particles