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Physics archive | Science | Khan Academy

Physics the study of matter, motion, energy, and force.

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收录于

2026年3月18日

学科与领域

physics · optics

年级范围

六年级–十二年级（高四）

页面类型

Course

简介

Physics Course Archive

  • Classical Mechanics:
    • Newton's laws of motion.
    • Normal force and contact force.
    • Inclined planes and friction.
  • Waves and Sound:
    • Introduction to mechanical waves.
    • Sound properties.
    • The Doppler effect.
  • Electromagnetism:
    • Discovery of magnetism and magnetic fields.
    • Methods for measuring magnetic fields.
  • Battery and Electrochemical Experiments:
    • Discovery of batteries (Zinc-copper reduction-oxidation cells).
    • Measurement tools: Battery meters and galvanometers.
    • Experimental variables: Number of turns, electrode polarity, electrode distance, and surface area.
    • Electrolyte testing: Comparing pure water, vinegar, strong acids, salt, and temperature effects.
    • Standard cell construction and electrolyte volume requirements.
    • The relationship between batteries and electromagnetism.
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