![thermodynamics - When heat is applied to the top of a stack of pennies, why does the bottom penny melt first? - Physics Stack Exchange thermodynamics - When heat is applied to the top of a stack of pennies, why does the bottom penny melt first? - Physics Stack Exchange](https://i.stack.imgur.com/ODpMZ.jpg)
thermodynamics - When heat is applied to the top of a stack of pennies, why does the bottom penny melt first? - Physics Stack Exchange
![TIL pennies (USD), since 1982, have been made of 97.5% zinc and 2.5% copper, instead of 100% copper as in the past. If pennies were still completely made of copper, melting one TIL pennies (USD), since 1982, have been made of 97.5% zinc and 2.5% copper, instead of 100% copper as in the past. If pennies were still completely made of copper, melting one](https://external-preview.redd.it/T-zimYCWmWXQzLQkirnx4peIGalyInfcPD6i0vZaNjk.jpg?auto=webp&s=d1528f457b456ea396ef0da27c6e370d66df97d8)
TIL pennies (USD), since 1982, have been made of 97.5% zinc and 2.5% copper, instead of 100% copper as in the past. If pennies were still completely made of copper, melting one
![Melting a Penny With a Car Battery - News about Energy Storage, Batteries, Climate Change and the Environment Melting a Penny With a Car Battery - News about Energy Storage, Batteries, Climate Change and the Environment](http://www.upsbatterycenter.com/blog/wp-content/uploads/2014/07/Melting_pennies_with_a_car_battery.png)
Melting a Penny With a Car Battery - News about Energy Storage, Batteries, Climate Change and the Environment
![I put a penny on a stove burner and it started to melt. I flicked it off of the stove with a spoon and it hit the floor. : r/mildlyinteresting I put a penny on a stove burner and it started to melt. I flicked it off of the stove with a spoon and it hit the floor. : r/mildlyinteresting](http://i.imgur.com/UgZ3uh5.jpg)