1.cells of ___ fibers contract and expand to help bones together
2. Force that is required for electrons to carry the charge in entire circuit is called____
3. the direction of flow of electronic current is from____charged body to ____ charged body
4.____ determined if the material is a good or bad conductor of electricity
6. Positivly charged ions are called____
7._____ is done on artificial ornaments to make them look as if they are made of real gold or silver
8. The medical instruments are coated with____
9.____ is a bright flash of electricity produced by a thunderstorm
10. two negatively charged bodies always ___each other
11.when a glass Rod is Rubbed with a silk cloth, the rod acquires____ charge and silk cloth acquires ____charge
12._____ reflection takes place when light strikes A rough surface.
13. any smooth polished surface which reflect back the rays of light is called___
14. to prevent accident_____ mirrors are used at Road bends so that the vehicle coming from opposite side can be seen.
15. the angle which reflected ray makes with the normal is called___