The longest-running experiment is the pitch drop experiment. A funnel holding a sample of tar pitch sealed in a glass jar shows how some substances that appear solid are actually liquid. It takes 10 years for a single drop to form.
![](https://img.wattpad.com/cover/125622015-288-k585366.jpg)
VOCÊ ESTÁ LENDO
200 Science Facts
DiversosCOMPLETED ▷ ╰ 200 Science Facts ╮ If you want science facts, this book is for you. Enjoy learning!
115
The longest-running experiment is the pitch drop experiment. A funnel holding a sample of tar pitch sealed in a glass jar shows how some substances that appear solid are actually liquid. It takes 10 years for a single drop to form.