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svlad2 [7]
3 years ago
13

A common isotope of iron–56 has an atomic number of 26. The total number of subatomic particles in the nucleus is? A. 26 B. 56 C

. 82 D. 30
Physics
1 answer:
laiz [17]3 years ago
6 0

Answer:

A common isotope of iron–56 has an atomic number of 26. The total number of subatomic particles in the nucleus is 56.

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MissTica

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3 years ago
Two spheres have identical charges and are 75 cm apart. the force between them is +0.30 n. what is the magnitude of the charge o
ella [17]

Answer:

4.33\cdot 10^{-6}C, charges are both positive or both negative

Explanation:

The electrostatic force between the two spheres is given by

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Solving the formula for q, we find

q=\sqrt{\frac{Fr^2}{k}}=\sqrt{\frac{(+0.30 N)(0.75 m)^2}{9\cdot 10^9}}=4.33\cdot 10^{-6}C

And the two charges have the same sign (so, both positive or both negative), since the sign of the force is positive (+0.30 N), so it is a repulsive force.

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