Hello Dudes! Pls help me in these 2 easy questions!
a. Define speed.
b. State its SI unit.
c. Write the formula for speed.

speed is the amount of distance achieved in a particular time.

SI unit of speed is m/s

formula= speed=distance/time

speed is distance covered by body at certain or per time.

SI unit m/s

formula:

speed =distance covered/time taken

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic