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2 years ago

9

Explain why the total positive charge in every atom of an element is always the same.

2 answers:

Aloiza [94]2 years ago

7 0

Answer:

I think it's to balance everything out unless it has an odd number.

Explanation:

geniusboy [140]2 years ago

3 0

Answer:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.

Explanation:

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speed of truck ahead = 10 m/s

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now the distance before they stop with respect to each other is given by

$v_f^2 - v_i^2 = 2 a d$

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so it will come at the same speed of truck after 20.6 m distance and hence it will not hit the truck as the distance of the truck is 25 m from car

Part b)

Distance traveled by car before it stops is given by

$v_f^2 - v_i^2 = 2 a s$

$0^2 - 27^2 = 2 * (-7)* s$

$s = 52.1 m$

so it will stop after it will cover total 52.1 m distance

Part c)

time taken by the car to stop

$v_f - v_i = at$

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$t = 3.86 s$

now the distance covered by truck in same time

$d = 3.86 * 10 = 38.6 m$

now after the car will stop its distance from the truck is

$D = 25 + 38.6 - 52.1 = 11.5 m$

<em>so the distance between them is 11.5 m</em>

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2 years ago