A student gathers approximate values for three vastly different objects.
a. (i) Convert the following radii into metres and write them in proper scientific notation:
(a) radius of Earth =6400km,
(b) radius of Moon =1740km,
(c) radius of a hydrogen atom =5.3×10−11m (already in metres).
b. (ii) State the order of magnitude of each radius.
c. (iii) How many orders of magnitude separate the radius of Earth from the radius of a hydrogen atom?
d. (iv) Calculate how many times the radius of Earth is greater than the radius of the Moon. Give your answer in scientific notation.