The Earth takes about 365 days to complete one orbit of the Sun. The mean radius of the Earth’s path around the Sun is $1.5 \times 10^8\ \text{km}$. What is the Earth’s average orbital speed?
- A$30\ \text{m s}^{-1}$
- B$4.8 \times 10^3\ \text{m s}^{-1}$
- C$3.0 \times 10^4\ \text{m s}^{-1}$
- D$4.1 \times 10^{10}\ \text{m s}^{-1}$