Question

PHYSICS

I. ANSWER THE FOLLOWING: (2×11⁄2=3)
1. a) Define metre.
b) Distinguish between fundamental units and derived units.
2. a) What is temperature?
b) Write any two rules and conventions for writing SI units and their symbols.
II. ANSWER IN DETAIL: (1x2=2)
3. Inian and Ezhilan argue about the light year. Inian says that it is 9.46 × 10^15 m
and Ezhilan argues that it is 9.46 × 10^12 Km. Who is right? Justify your answer.

Answer 1

Answer:

1.The meter, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s-1, where the second is defined in terms of ΔνCs.

2.