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inna [77]
3 years ago
6

1. If the atomic number is 25, how many protons does it have?

Physics
1 answer:
ololo11 [35]3 years ago
7 0
1. 25
2. 55-25 = 30

Hope this helps! :)
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Which of the following is a balanced equation?
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A. Na2S + 2KCI - 2NaCl + KZS

Explanation:

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This involves convection currents.
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1. A large ball was let go on a hill and started rolling down with a constant acceleration of 4.2 m/s². What was the velocity of
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Answer:

<em>The velocity after 12s is 50.4m/s</em>.

Explanation:

<em>In acceleration formula make velocity the </em><em>subject.</em>

<em> acceleration(a) = velocity(</em>v)÷time(t)

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<em>V </em><em>=</em><em> </em><em>4</em><em>.</em><em>2</em><em>m</em><em>/</em><em>s²</em><em>×</em><em>1</em><em>2</em><em>s</em>

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8 0
2 years ago
A horizontal spring with stiffness 0.4 N/m has a relaxed length of 11 cm (0.11 m). A mass of 21 grams (0.021 kg) is attached and
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Answer:

0.6983 m/s

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