answer the following 2

1. Define Physics.
2. What does Physics deal with?
3. write some  technological applications of physics.
4. What is force?
5.  What are the four basic forces of nature?
6. What is an unit?
7. What is SI system?
8. How many fundamental units and supplementary units are there in SI sytem of units?
9. Why does the SI system not vary with the time?
10. What is one standard metre ?
11. One standard metre is equal to -------------- wavelengths of the ---------------light emitted by the individual --------of--------in a krypton --------lamp.
12. what is mass? 
13. What is one kg equal to?
14. What is  there at the International bureau of weights and measures  and where is this bureeau?
15. Define one standard second.
16. What is Kelvin?
17. Define one light year.
18. Define Astronomical unit
19. Define precision of a number
20. What are the significant figures?
21. what is an error?
22. What is constant error?
23. What is systemic error?
24. What are random errors?
25. What are  dimensions of a physical quantity?
26. What are dimensional constants?
27. When or where is the principle of homogeneity used?
28. When is an equation dimensionally correct?
29. 
    

1. 
   
2.