Question

A) work out the radius of the mercury, giving your answer as an ordinary number

b) work out the difference between the masses of jupiter and saturn

Answer 1

a. 2,440 km

b.
`1.33*10^(27) kg`

Explanation:

a. Diameter of Mercury =
`4.88*10^3`

Radius of Mercury = ½ of its diameter =
`(4.88*10^3)/(2)`

Radius of Mercury =
`2.44*10^3`

To convert the radius to ordinary number, multiply 2.44 by 1,000.

Radius of Mercury as an ordinary number =
`2.44*1,000 = 2,440 km`

b. Mass of Jupiter =
`1.898*10^(27) kg`

Mass of Saturn =
`5.68*10^(26) kg`

Difference between mass of Jupiter and mass of Saturn =
`1.898*10^(27) - 5.68*10^(26)` (subtract 5.68 from 1.898 = 5.68. we would retain the largest exponent, which is raised to the lower of 27.)

`= 1.33*10^(27)`