2A10.05 - Surface Tension - Pennies in a Cup
Fill a plastic cup to the very top so that there is a visible meniscus showing above the rim of the cup. Start dropping pennies into the cup. See how many pennies it takes before the water spills out of the cup.
- Robert Ehrlich, "H.16, Dropping Pennies into a Water-Filled Cup", Turn The World Inside Out, p. 110.
- Bobby Mercer, "Super Wet Penny", Junk Drawer Chemistry, 2016, p. 32.
- Tik L. Liem, "How Many Pennies Can Go In", Invitations to Science Inquiry - Supplement to 1st and 2nd Ed. p. 44.
- Julius Sumner Miller, Q126 & A126, Millergrams II – Some More Enchanting Questions for Enquiring Minds, p. 18 & 80.
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