Do You Know?
1. I have to create passwords for using the Internet but am worried if they are safe. What makes a good password?
2. I know that water is made up of hydrogen and oxygen. At what temperature will water split into hydrogen and oxygen?
3. When I apply a force on an object, how quickly can the force propagate? Can it propagate at the speed of light?
4. When we get scared, some physical changes take place in our body. How does this happen?
5. What would happen to the Earth if a meteor hit the moon and destroyed it?