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Roman55 [17]
3 years ago
5

What does the atomic number tell us about an atom of a certain element?

Physics
1 answer:
Setler79 [48]3 years ago
4 0
It tells us the number of protons that are present in the nucleus, the positively charged region of that atom.
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Three collinear forces,F1=45N west,F2=63N east and an unknown force F3 are applied to an object.The resultant force of the three
Greeley [361]

Take east to be the positive direction. Then the resultant force from adding <em>F</em>₁ and <em>F</em>₂ is

<em>F</em>₁ + <em>F</em>₂ = (-45 N) + 63 N = 18 N

which is positive, so it's directed east.

To this we add a third force <em>F</em>₃ such that the resultant is 12 N pointing west, making it negative, so that

18 N + <em>F</em>₃ = -12 N

<em>F</em>₃ = -30 N

So <em>F</em>₃ has a magnitude of 30 N and points west.

6 0
3 years ago
Could you please explain to me Newton's second law of motion? Please I don't get it :/
MissTica

Answer:

Newton's second law states that when a body of mass m is accelerated with force f

then F=ma

this means acceleration of an object depends on both force with which it is moving as well as its mass

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Sultan throws a ball horizontally from his window, 12 m above the garden. It reaches the ground after
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Answer:

<h2>2.4</h2>

Explanation:

<h2><em>Hope it help mark as Brainlist</em></h2>
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A stone is thrown horizontally at a speed of 10.0 m/s from the top of a cliff 139.4 m high.
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Answer:

a) 14.2sec

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Explanation:

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