# Why is ketchup so hard to pour?

- Institution: TED
- Department: TED-Ed
- Speaker: George Zaidan
- Year: 2014
- Level: For everyone
- Language: English
- Subjects: Physics
- Source: [TED](https://www.ted.com/talks/george_zaidan_why_is_ketchup_so_hard_to_pour)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Ever go to pour ketchup on your fries...and nothing comes out? Or the opposite happens, and your plate is suddenly swimming in a sea of red? George Zaidan describes the physics behind this frustrating phenomenon, explaining how ketchup and other non-Newtonian fluids can suddenly transition from solid to liquid and back again. \[Directed by TOGETHER, narrated by George Zaidan\].

## Lectures

1. [Why is ketchup so hard to pour?](https://invisiblenetwork.ai/learn/ted/george_zaidan_why_is_ketchup_so_hard_to_pour/58d390b1c2dc), 5 min (TED's player)