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3 years ago

14 How many electrons are in the atom pictured? 9 p* 10 nº

Physics

1 answer:

yKpoI14uk [10]3 years ago

7 0

Answer:

9 electrons

Explanation:

The structure has 9 protons and hence the number of electrons equals the number of protons that's why it is said to be electrical neutral

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it Bob btw

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A particle that is moving along a straight line accelerates from 40 cm/s to 20 cm/s in 5.0 s and then has a constant acceleratio

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Answer:

Average speed, $v_{avg}=43.33\ \rm cm/s$

Explanation:

Given:

Initial speed, u=40 cm/s
final speed , v=20 cm/s
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<u>First case</u>

Using equation of motion we have

$2as=v^2-u^2\\2as=20^2-40^2\\as=-600\\$

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Time taken $t=4\ \rm s$

using equation of motion in one Dimension we have

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$v_{avg}=\dfrac{150+240}{5+4}\\v_{avg}=43.33\ \rm cm/s$

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