2013年4月17日水曜日

Let’s dissolve egg white using shampoo!

Shampoo has ability to denature protein.

Let's put the shampoo into white egg and observe the denaturation of protein.

First, put the white egg into the glass.


Next, put the shampoo into the glass of white egg.


After a few minutes, you can observe the denaturation of protein.


In the exam, you and your kids find that the excess shampoo may hurt your hair.

Hope you and your kids enjoy the exam.

Difference between a raw and boiled egg

Do you or your kids know how to distinguish between a raw and boiled egg?

It's easy to distinguish.

A raw egg does not coagulate.
Therefore, it's hard to start spinning and stop.
Look at the movie as follow.
You can see the slow rotation and when I stop the rotation, the egg does not stop immediately.

On the other hand, a boiled egg coagulates.
Let's spin the egg to learn.
You can see the faster rotation and when I stop the rotation, the egg stop immediately.
Hope you and your kids enjoy the exam.

2013年4月8日月曜日

Float the ping-pong ball in the air!

Float the ping-pong ball in the air!
It’s easy to setup and you can have fun with your kids.

Setup a blower as shown in a movie and turn on the switch.
Please note that hot air may be dangerous to the ping-pong ball because the air generates by a blower.

Put a ping-pong ball on the generated air gently!
Observe the ping-pong ball is dancing.

Did you know that the ping-pong ball can float in the air?
Hope you and your kids enjoy the exam.