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<span>When the velocity was 0 m/s, all the forces acting on the car were balanced. The velocity changed because at least one unbalanced force is acting on the car. </span>
Answer:
D
75 neutrons and 50 protons and 50 electrons
Explanation:
Atomic number represents the number of protons and it's the same number for electrons
50 protons and 50 electrons
the mass number represents the number of neutrons and protons
125-50=75 neutrons
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They release carbon into the ground and back into the air.