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nadezda [96]
3 years ago
11

An ______ is a substance in which one or more atoms have the same number of protons.

Advanced Placement (AP)
2 answers:
Free_Kalibri [48]3 years ago
6 0
The substance you're describing is an Element.

Hope this is helpful!
natulia [17]3 years ago
5 0
Your answer would be an isotope have a very nice day
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3 years ago
a piece of clay with mass m is traveling with an unknown velocity in the positive x-direction, when it collides and sticks to a
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5\ \text{m/s}

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As mometum in the system is conserved we get

m_1u+m_2v=(m_1+m_2)v_c\\\Rightarrow u=\dfrac{(m_1+m_2)v_c-m_2v}{m_1}\\\Rightarrow u=\dfrac{(m+3m)\times -1-3m\times -3}{m}\\\Rightarrow u=\dfrac{5m}{5}\\\Rightarrow u=5\ \text{m/s}

The original velocity of the clay mass was 5\ \text{m/s}.

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