Top network posts
- 68Why can we see the dust particles in a narrow beam of light (and not in an all lighted area)?
- 52How can the Earth keep spinning with a liquid core?
- 36Why are a motorcycle's front brakes more effective than back?
- 31Do gravitational lenses have a focus point?
- 23Why do prisms work (why is refraction frequency dependent)?
- 22Why doesn't light kill me?
- 21Do low frequency sounds really carry longer distances?
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