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27

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PAGE: 8SET: ExercisesPROBLEM: 27
Please look in your text book for this problem Statement

The radius of Earths orbit is .

a.

Find the circumference of Earths orbit assuming that the orbit is a circle.

The formula for the circumference of a circle is .

                                 (Formula)

               (Substitute)

    (Multiply)

Therefore, the circumference of the earth is .

b.

Earth travels at a speed of around the Sun.

The formula , where is time in hours, is circumference and is velocity.

Find the number of hours it takes Earth to revolve around the Sun.

              (Substitute and )

                  (Simplify)

Therefore, the number of hours it takes Earth to revolve around the Sun is .

c.

It takes year for Earth to go around the Sun.

.

Yes;.

a.The circumference of the earth is .

b.The number of hours it takes Earth to revolve around the Sun is .

c.Yes; .



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