Chapter P, Problem 19E

The Length of Earth’s Orbit The Earth is approximately $93$ million miles from the sun. For this exercise, we will assume that the Earth’s orbit is a circle ${}^2$.

a. How far does the Earth travel in a year?

b. What is the velocity in miles per year of the Earth in its orbit? (Hint: Recall that

Velocity = $\frac{\mathrm{D}\mathrm{i}\mathrm{s}\mathrm{t}\mathrm{a}\mathrm{n}\mathrm{c}\mathrm{e}}{\mathrm{T}\mathrm{i}\mathrm{m}\mathrm{e}}$.)

c. How many hours are there in a year? (Note: Assume a year is 365 days)

d. What is the velocity in miles per hour of the Earth in its orbit?