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Physics archive | Science | Khan Academy

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

概览

收录于

2026年3月18日

学科与领域

physics · thermodynamics

年级范围

九年级（高一）–十二年级（高四）

页面类型

Course

简介

Khan Academy Physics Archive Topics

  • 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 and Batteries:
    • Discovery of magnetism and magnetic fields
    • Measuring magnetic fields
    • Battery Experiments (Zinc-Copper Cell):
      • Measurement techniques (galvanometer/battery meter)
      • Variables tested: Number of turns, electrolyte type (water, vinegar, acid, salt), electrode polarity, electrode distance, electrode surface area, and electrolyte temperature.
      • Standard cell construction and electrolyte volume requirements.
      • Relationship between batteries and electromagnetism.
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