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faust18 [17]
3 years ago
13

What is 7.4 in it's simplest form?

Physics
1 answer:
Iteru [2.4K]3 years ago
4 0
Assuming that you mean to ask <em>. . . "What is 7.4 </em><u><em>as a fraction</em></u><em> in simplest form</em>?"

7.4 = 7 and 4/10

4/10 can be reduced to 2/5

7 represents = (7*5)/5 = 35/5

so . .  7 + 4/10 = 35/5 + 2/5 = 37/5 (improper fraction in simplest form)
or
 . . . . 7 + 4/10 = 7 2/5 (mixed fraction in simplest form)
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Answer: 5,640 s (94 minutes)

Explanation:

the tangential speed of the HST is given by

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where

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T is the orbital period

In our problem, we know the tangential speed: v=7,750 m/s. The radius of the orbit is the sum of the Earth's radius and the distance of the HST above Earth's surface:

r=6.38\cdot 10^6 m+569,000 m=6.95\cdot 10^6 m

So, we can re-arrange equation (1) to find the orbital period:

T=\frac{2 \pi r}{v}=\frac{2 \pi (6.95\cdot 10^6 m/s)}{7,750 m/s}=5,640 s

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