A penny is more dense than a wooden toothpick. This can be easily tested by placing both in a glass of water.
you suck for reading this
A penny is more dense than tea, so it sinks.
5.2349812365cm3
1972 has no significance in terms of changes in penny densities. The US Mint did not change the composition of its penny between 1909 to 1982, so any pennies from within this time period would have the same density. Pennies from this time period all contained the same proportions of metals (95% copper, 5% zinc.) Coins from post-switch 1982 to present day are minted of 97.5% zinc and 2.5% copper. Copper's density is ~8.9g/cm3 while zinc's density is ~7.1g/cm3. Considering the relative compositions of each version of the penny, the post-1982 penny would be the less dense penny, and the pre-1982 penny would be the more dense of the two.
How a toothpick works best is a personal preference. I like a flat toothpick because my teeth are tight in my mouth. Someone with more space between their teeth may prefer a round toothpick.
round toothpick: 3 inches long by 1/16 inch thick (more specifically, 2 5/8") flat toothpick: 3 inches long by 1/64 inch thick
a solid is more dense
More Dense.
change the toothpick
Earth is more dense.
No pine is more dense then cedar.
A toothpick bridge, if you make it just right. :)