DF6_Video

media type="custom" key="6420821" Watch this video to learn how to use the mnemonic, Please Excuse My Dear Aunt Sally, to solve a number sentence. (Note, this video was limited to 30 seconds and the ending has been cut off. I am working to replace it with a full length video.)

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Watch the video.

After watching the video answer the following questions:

1. Why does your voice get higher after you inhale helium?

2. Why does your voice get lower after you inhale sulfur hexafluoride?

3. Why shouldn't you inhale sulfur hexafluoride?

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