How Can You Separate Salt and Pepper Without Physical Contact?

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The discussion revolves around the challenge of separating a mixture of salt and pepper without any physical contact. Participants explore various methods, emphasizing the constraints of not touching the mixture directly. Suggestions include using heat to evaporate components, leveraging static electricity, and employing a centrifuge, although the latter is debated due to the difficulty of avoiding physical interaction. The conversation highlights the differences in properties between salt and pepper, such as melting points and densities, while also addressing the nuances of what constitutes physical contact. Ultimately, the idea of using static electricity to separate the two substances garners attention, but participants remain divided on whether this method truly avoids physical interaction.
  • #31
DaveC426913 said:
It most distinctly is not.

You could slip a solid object such as a piece of paper between the balloon and the mixture. No physical contact.
It most distinctly is

You could slip a solid object such as a piece of glass between the balloon and the mixture. No separation.
 
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  • #32
jimmysnyder said:
It most distinctly is

You could slip a solid object such as a piece of glass between the balloon and the mixture. No separation.
You appear to be saying that "it most distinctly is" physical contact between the balloon and the mixture. Is that what you meant to say?

My point was I could slip something between balloon and mixture, demonstrating that no physical contact is necessary to in order to separate the substances.
 

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