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Earth travels in an approximately circular orbit around the sun. The average radius of Earth's orbit around the sun is 9.3 times 10 Superscript 7 miles. Earth takes one year, or 365 days, to complete one orbit.

AUse the formula for the circumference of the circle to determine the distance, Upper L, the Earth travels in one year. Express your answers in scientific notation.

L=a * 10^n

Bhow many hours, H are in one year?
CSpeed is distance divided by time. Find the orbital speed, v, of Earth in miles per hour.

v= ? miles per hour

Verified Answer :

taskmasters
AL is the circumference of the orbit
L = 2piR
where pi = 3.1416
L = 2(3.1416) ( 9.3x10^7 miles)
L = 5.8 x10^8 miles

b. hours in a year = 365 days ( 24 hrs / 1 day)
hours in a year = 8760 hr

c. velocity = L/t
v = 5.8 x10^8 miles / 8760 hr
v = 6.7 x10^4 miles  per hour

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