Physics · 5 lessons · 4 quick hits

Heat and temperature

Water that stays liquid below freezing, drops that skate on a hot pan, and why metal feels colder than wood.

  1. Lesson 125:48Why is this water LIQUID at -11C???Why does water stay at liquid at -11C??? (When it should freeze at 0C).
  2. Lesson 218:39Does Adding Salt Change Water's Temperature? (With Handwritten Tutorial!)I never noticed what happened when I dissolved regular table salt in water. Do you know?
  3. Lesson 33:41What does Salt do to Waters Temperature??? Handwritten Tutorial Explanation
  4. Lesson 48:26Leidenfrost Effect and Water DropsThe Leidenfrost Effect is a nearly magical phenomena where water seems to stop heating when the surface of a pan gets insanely hot.
  5. Lesson 510:43Burn paper with SUPERHEATED STEAMIn this science experiment we see if paper can be burned with hot water steam. How hot must the steam get? Paper burns at over 420F (or 215C) but water boils at 100C.

Quick hits

Under a minute each. Good for a "watch this" before dinner.