Dear Mary: I inadvertently placed a glass mixing bowl in another bowl of a similar size that was still damp. Now I can't get them apart. Do you have any ideas how to get these two bowls apart? -- Sarma R., e-mail

Dear Sarma: Gather the kids around because you have the perfect opportunity to show them how to use science in everyday life -- specifically the way that heat causes things to expand and cold makes them contract.

First, fill the inner bowl with cold water. Now fill you ...

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