When you're walking outside the top of your shadow is blurry. This is because of diffraction!
how is petrol used in our everday life
It usually isn't. Scientific notation is used for very large and very small numbers, that are not normally used in your daily life. Unless your "daily life" involves work in science or engineering.
I use the Golden Ratio in my daily life to design websites.
Tools that are commonly used to study daily life include things like polls and surveys. Sometimes video cameras and audio recordings are also used to study daily life.
In dentistry .
These nuts
You pet them
Sunblock.
In dentistry .
in alternators
They are used in airplanes and in sailboats.
zero is used badly