So, physics, anyone?

Today's physics study says:
Waves are everywhere. Whether we recognize or not, we encounter waves on a daily basis. Sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, cosine waves, telephone chord waves, stadium waves, earthquake waves, waves on a string, and slinky waves and are just a few of the examples of our daily encounters with waves. In addition to waves, there are a variety of phenomenon in our physical world which resemble waves so closely that we can describe such phenomenon as being wavelike.
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Now, please tell me if you play with a slinky daily. I'd like to know.

- Leah & Kari