PHYSICS.
1. If car go straight 12 km and come back straight 6 km. Find displacement
2. How pascal's law is used in hydraulic jick?
CHEMISTRY.
1. How ozone layer O(three) is form?
2. Who found silicon?
BIOLOGY.
1.whate is the difference between disorder and disease?
2. Explain the function of heart. And whate source is used to open vessel in angioplasty?

..use your brain and answer.