1. The magnitude of the electric force between the two charges is 2.8×10⁹ N (Option B)
2. The net charge on the molecule is -8×10⁻¹⁹ C (Option D)
3. The magnitude of the force between the charges is 16000 N (Option C)
4. The correct statement is: A neutral object has equal numbers of protons and electrons. (Option C)
<h3>1. How to determine the force</h3>
- Charge 1 (q₁) = +3 C
- Charge 2 (q₂) = +5 C
- Electric constant (K) = 9×10⁹ Nm²/C²
- Distance apart (r) = 7 m
- Force (F) =?
F = Kq₁q₂ / r²
F = (9×10⁹ × 3 × 5) / (7)²
F = 2.8×10⁹ N
<h3>2. How to determine the net charge on the molecule</h3>
- Electron = 223 electrons
- Proton = 218 protons
- Net Charge =?
Charge = Proton - Electron
Charge = 218 - 223
Charge = -5 electrons
But
1 electron = 1.6×10⁻¹⁹ C
Thus,
Net Charge = -5 × 1.6×10⁻¹⁹ C
Net Charge = -8×10⁻¹⁹ C
<h3>3. How to determine the force</h3>
- Charge 1 (q₁) = 2×10⁻⁴ C
- Charge 2 (q₂) = 8×10⁻⁴ C
- Electric constant (K) = 9×10⁹ Nm²/C²
- Distance apart (r) = 0.3 m
- Force (F) =?
F = Kq₁q₂ / r²
F = (9×10⁹ × 2×10⁻⁴ × 8×10⁻⁴) / (0.3)²
F = 16000 N
<h3>4. What is a neutral object?</h3>
A neutral object is an object having equal numbers of protons and electrons. For example, an object with 4 protons and 4 electrons is said to be neutral as illustrated below
- Electron = 4 electrons
- Proton = 4 protons
- Net Charge =?
Charge = Proton - Electron
Charge = 4 - 4
Charge = 0 (neutral)
Thus, the correct statement about neutral object, given in the question is: A neutral object has equal numbers of protons and electrons (Option C)
Learn more about Coulomb's law:
brainly.com/question/506926
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(with negative sign since it is due south)
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