Formula booklet - Conversion factors

Question 1

1 u = 1.661x10^-27kg

Answer 1

**1 u = 1.661x10-27kg **is the unified atomic mass unit.

The unified atomic mass unit is the standard unit that is used for indicating mass on an atomic or molecular scale (atomic mass).

Question 2

1 eV = 1.60x10^-19 J

Answer 2

**1 eV = 1.60x10-19 J **is the conversion factor for one electron volt (1 eV).

It converts the energy of a particle in Joules into one electron volt, a unit of energy equal to the work done on an electron in accelerating it through a potential difference of one volt.

Question 3

8.64x10⁴s

Answer 3

8.64x104s is one Earth day.

One rotation of Earth’s axis.

Question 4

3.16x10⁷

Answer 4

3.16x107 is one Earth year.

One Earth year is the period of approximately 365.25 solar days required for one revolution of the earth around the sun.

Question 5

9.5x10¹⁵m

Answer 5

**9.5x1015m **is 1 light year.

One light year is the distance that light travels in a vacuum in one year.