1. To help defend Syracuse against Roman attackers, in 216 b.c, Archimedes invented many war machines.They included an awesome 'claw' a giant grappling crane that could lift galleys from the water and sink them.
3. A song can shatter glass if the pitch of a loud note coincides with the natural frequency of the glass.
4. Each year 21 million tonnes of aluminium are made mostly from Bauxite dug up in Brazil and New Guinea.
5. Some types of rubber can be stretched up to 1000 times beyond its original length before it reaches its elastic limit.
6. The oxygen in the air on which your life depends was produced mainly by algae.
7. On August 2, 1939 Albert Einstein wrote a letter to US President Franklin Roosevelt in which he persuaded the president to launch the Manhattan Project to develop the nuclear bomb.
8. If an atom were the size of a sports arena, its nucleus would be the size of a pea!
9. Cosmic rays are not rays but streams of high energy particles from space.
10. The water pressure 10,000 m below the surface is equivalent to seven elephants standing on a dinner plate!
2. One of the strongest magnets in the world is at Lawrence Berkeley National Laboratory, California, USA, Its field is 250,000 times stronger than the Earths!
3. A song can shatter glass if the pitch of a loud note coincides with the natural frequency of the glass.
4. Each year 21 million tonnes of aluminium are made mostly from Bauxite dug up in Brazil and New Guinea.
5. Some types of rubber can be stretched up to 1000 times beyond its original length before it reaches its elastic limit.
6. The oxygen in the air on which your life depends was produced mainly by algae.
7. On August 2, 1939 Albert Einstein wrote a letter to US President Franklin Roosevelt in which he persuaded the president to launch the Manhattan Project to develop the nuclear bomb.
8. If an atom were the size of a sports arena, its nucleus would be the size of a pea!
9. Cosmic rays are not rays but streams of high energy particles from space.
10. The water pressure 10,000 m below the surface is equivalent to seven elephants standing on a dinner plate!
interesting stuff:-D..
ReplyDelete