Having an egg in your hand, how can you tell in seconds whether it is raw or hard-boiled, of course without breaking it!
(You also have a table)
Explain the physics behind if you know.
2006-12-21 11:23:39 · 29 answers · asked by Farshad 2 in Science & Mathematics ➔ Physics
Hey, I agree that a boiled egg spins faster than a raw one, but you have ony ONE egg. How can you measure or compare its rotation speed? Try it with one egg to see if it's ganna work!
2006-12-21 11:51:09 · update #1
Spin it...then quickly stop it by placing a finger on top of it briefly, then remove your finger.
If it starts spinning again, it's raw. (The liquid inside continued spinning, and will start the egg spinning again.)
If it does NOT start spinning again...the inside is cooked.
2006-12-21 11:26:50 · answer #1 · answered by Anonymous · 4⤊ 0⤋
I know the physics behind it, but I'm not going to explain it. It's due to rotational inertia (brush up on that).
If you spin the egg on a tabletop, then stop it quickly and quickly remove your hand, it will stay at a stop if it's hard-boiled. If it's raw, the inside will still spin a little and when you let go the egg will spin some more.
2006-12-21 11:27:22 · answer #2 · answered by Anonymous · 2⤊ 0⤋
Spin the eggs on the table. The hardboiled will spin like a top where the raw egg will fall after only about 1 a turn.
2006-12-21 11:31:23 · answer #3 · answered by Zster 2 · 1⤊ 1⤋
A few people have it right, after reading their answers I even tried it out (being an engineer, it made sense).
Spin the egg like a top, then stop it and release it again right away. If it is raw, it will start spinning again.
Way too cool...I have to show this to my nephew :)
m
2006-12-21 17:19:09 · answer #4 · answered by Mukluk 2 · 0⤊ 0⤋
there are a few approaches-
A. You can tap it. the resulting noise will be different, due to the vibrations moving through the liquid/solid substances inside
B. You can spin it. The hardboiled egg will spin longer because it's insides are fixed, unlike a raw egg where the yolk+white would move up against the walls. The hardboiled egg will spin longer.
2006-12-21 11:31:02 · answer #5 · answered by obsessive_writer 2 · 1⤊ 1⤋
Spin it and then stop it, to just let it loose once more. If it keeps moving, the egg is raw. If it stops fully, it is hard boiled.
Why?
The fluids inside the shell keep moving despite the shell being stopped. Inertia makes the egg move.}
When it's hard, there are no fluids inside, so the whole egg stops.
2006-12-21 11:27:58 · answer #6 · answered by Исаак Озимов 3 · 2⤊ 0⤋
Place the eggs on the two plates and start them spinning at the same time. The egg that continues spinning for the longest time is the hard boiled egg.
2006-12-21 11:26:46 · answer #7 · answered by brattybard 3 · 1⤊ 2⤋
When you roll/spin it if it doesn't roll smoothly it is raw and visa-versa. This is because the heat breaks the hydrogen bonds in the albumen (egg-white), causing it to solidify. As a liquid, when rolled the gravity-inertia causes the albumen inside to be driven to right near the outer part of the egg, by the shell, causing it to roll ackwardly (rocking, etc) and it will spin for longer as the fluid needs to return to a stable position. As a solid, the effect of the gravity spin doesn't affect it as much, thus it rolls smoothly.
2006-12-21 11:28:54 · answer #8 · answered by Anonymous · 1⤊ 1⤋
Spin it on the table. A raw egg will spin slowly (owing to yolk displacement); the cooked egg, being solid, will spin for a long time
2006-12-21 11:25:32 · answer #9 · answered by Anonymous · 2⤊ 1⤋
you spin it. The raw egg will not spin well and will move around, meanwhile the cooked egg will spin in one spot because all of the inside is harded and blanced so it will stay in one place
2006-12-21 11:27:16 · answer #10 · answered by Tim Pham 1 · 1⤊ 1⤋