April 2nd, 2007, 12:31 PM
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| Super Member | | Join Date: May 2006 Location: Lexington, MA (USA)
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Hello, Stuck686!
Sounds like you need lessons on converting units . . . Quote: 3) Assume the Earth orbits the Sun once per year (365 days),
in a circular way with sun at the center.
Also Earth is 93,000,000 miles from the sun.
What is the linear speed of the earth in miles per hour? |
The circumference of a circle is: .C .= .2πR . (R = radius)
The radius of Earth's circular orbit is: .R = 93,000,000 miles.
The length of Earth's orbit is: .C .= .2π(93,000,000) .≈ .584,336,234 miles
Hence, the Earth travels 584,336,234 miles in one year.
584,336,234 miles . . . .1 year . . . . .1 day
---------------------- .x .----------- .x .----------- . ≈ . 66,705 miles/hour
. . . . 1 year . . . . . . . 365 days . . .24 hours
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