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Kruka [31]
3 years ago
5

27. Scott travels north 5 miles and then goes west 3 miles before coming straight back south 2 miles. What is his distance? *

Chemistry
1 answer:
belka [17]3 years ago
5 0

Scott traveled 10 miles in his journey.

<u>Explanation</u>:

Scott first travels 5 miles in north direction, then he turns to west and covers 3 miles distance finally he turns to south and travels 2 miles. We need to find the total distance covered by the Scott. To find the distance we should sum up all the distances he covered in three directions 5 miles north + 3 miles west + 2 miles south = 10 miles.

Therefore we can conclude that the total distance traveled by the Scott is 10 miles.  

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A certain radioactive isotope has a half life of one hour. I you start with 1.0 g of the material at 1:00 P. M. 0.5 grams will be present at 2:00 P.M. on the same day.

<h3>What is half Life ?</h3>

Half life is the amount of time required to reduce to one half of its initial value. The symbol of half life is t_{1/2}.

<h3 /><h3>How to calculate the quantity remaining when half life given ?</h3>

It is expressed as:

N_{t} = N_{0} (\frac{1}{2})^{n}

where,

N(t) = quantity remaining

N₀ = initial quantity

n = half life that have passed

Now put the values in above expression we get

N_{t} = 1.0\ g \times (\frac{1}{2})^{1}

     = \frac{1}{2} g

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