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Re: How many drops of water can a penny hold?
It's a wonderful lab. I've used it for many years. It's got to do with "adhesion", the water holding on the the face of the penny; and "cohesion", each molecule of water holding o… (View Post)1 -
These are from this week's "change" ...
I collect my change from Sunday through Friday and sort it out to spend Saturday. These are my newest scores (baby scores ... but still cool) ... (View Post)1