StudySmarter AI is coming soon!

- :00Days
- :00Hours
- :00Mins
- 00Seconds

A new era for learning is coming soonSign up for free

Suggested languages for you:

Americas

Europe

Q10.

Expert-verifiedFound in: Page 43

Book edition
7th

Author(s)
Douglas C. Giancoli

Pages
978 pages

ISBN
978-0321625922

Every year, the earth travels about ${10}^{9}$ km as it orbits the sun. What is the earth’s average speed in km/h?

The earth’s average speed is $1.14\times {10}^{5}\frac{\mathrm{km}}{\mathrm{h}}$.

The earth’s orbit is a two-dimensional plane in which it rotates around the sun. The earth takes 365 days to complete one complete cycle in its orbit.

Given data.

The traveled distance of the earth in a year is ${10}^{9}\mathrm{km}$.

Now, you know that there are 365 days in a year and 24 hours in a day. Then,

$\begin{array}{c}1\mathrm{year}=365\mathrm{day}\\ =365\mathrm{day}\times \frac{24\mathrm{hour}}{1\mathrm{day}}\\ =8760\mathrm{hour}\end{array}$

Now, you know that

$\begin{array}{c}\mathrm{Average}\mathrm{speed}=\frac{\mathrm{Total}\mathrm{distance}}{\mathrm{Total}\mathrm{time}}\\ =\frac{{10}^{9}\mathrm{km}}{8760\mathrm{h}}\\ =1.14\times {10}^{5}\frac{\mathrm{km}}{\mathrm{h}}\end{array}$

Therefore, the earth’s average speed is $1.4\times {10}^{5}\frac{\mathrm{km}}{\mathrm{h}}$.

94% of StudySmarter users get better grades.

Sign up for free