Question

Write the following in scientific notation.

a. Diameter of the earth is 127560000 miles.


b. Size of the bacterium is 0.00000085mm.


c. Earth’s volume is about 10830000000000 cubic kilometres.​

Answer 1

a) Diameter of the earth is 1.2756 × 10^8 miles

b) Size of the bacterium is 8.5 × 10^-7 mm

c) Earth's Volume is about 1.083 × 10^13

Use decimal after 1st digit, then count the total number of digit

The total number of digit will be the exponential power of 10

Example: (i) 234500 cm

use decimal after 1st digit here its is 2, then count from 3 to 0 (here are 5 digits after decimal)

therefore the exponential power of 10 will be 5 i.e

10^5