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creativ13 [48]
3 years ago
14

Which element has 19 electrons surrounding the nuclei of its atoms?

Physics
1 answer:
Tems11 [23]3 years ago
4 0
I think it's potassium, but i'm not sure
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What time does the clock go back for daylight savings
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How to play track and field
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3 years ago
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A delivery truck leaves a warehouse and travels 2.60 km north. The truck makes a left turn and travels 1.25 km west before makin
yulyashka [42]

Answer:

4.19 km and 107.35 degrees north of east

Explanation:

So in the end, the truck is (2.6 + 1.4 = 4km) north and 1.25 km west from the warehouse. We can use the Pythagorean formula to calculate the magnitude and direction α of the truck displacement from the warehouse:

s = \sqrt{s_n^2 + s_w^2} = \sqrt{4^2 + 1.25^2} = \sqrt{16 + 1.5625} = \sqrt{17.5625} = 4.19 km

tan\alpha = \frac{s_n}{s_w} = \frac{4}{1.25} = 3.2

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