Earth science more help?

[JelloIsLife]

I am in 8th grade and i need the answers to this so please dont make this too complicated!


The circumference of Earth is approximately 40,000 kilometers at the Equator. What is Earth's approximate rate of rotation, in kilometers per hour, at the Equator?

 

[anonymous]

All you have to do is divide 40,000 by 24 (24 hours in a day) and you'll get your answer.

 

[Nikki s]

i have the exact same question. i'm in the eight grade and had to answer it as practice. are you taking the regents this year and did you get the question from Barronsregents.com

 

[Elizabeth H]

If the equatorial radius of Earth is 6378 kilometers, the circumference comes to 40074 kilometers slightly more than the 40,000 kilometers supposed to be the pole-to-pole circumference, implied by the definition of "one meter." The difference comes because the Earth bulges out at its equator. The velocity of the equator then is

40074 / 86164 = 0.4651 kilometers = 465.1 meter/sec

1 Meter Per Second = 3.6 Kilometers Per Hour