Observations and Answers:
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Force Between Charges:
- \( q_a = 1.0 \times 10^{-4} , C \), \( q_b = 1.0 \times 10^{-4} , C \) → Repulsion
- \( q_a = -1.0 \times 10^{-4} , C \), \( q_b = 1.0 \times 10^{-4} , C \) → Attraction
- \( q_a = -1.0 \times 10^{-4} , C \), \( q_b = -1.0 \times 10^{-4} , C \) → Repulsion
- \( q_a = 1.0 \times 10^{-4} , C \), \( q_b = 0.0 \times 10^{-4} , C \) → Zero
- \( q_a = 1.0 \times 10^{-4} , C \), \( q_b = 1.0 \times 10^{-4} , C \) → Repulsion
- \( q_a = -1.0 \times 10^{-4} , C \), \( q_b = 1.0 \times 10^{-4} , C \) → Attraction
- \( q_a = -1.0 \times 10^{-4} , C \), \( q_b = -1.0 \times 10^{-4} , C \) → Repulsion
- \( q_a = 1.0 \times 10^{-4} , C \), \( q_b = 0.0 \times 10^{-4} , C \) → Zero
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Rules:
- When the charges are the same, the two objects repel one another.
- When the charges are opposite, the two objects attract one another.
- When one of the objects has no charge, the resulting force is zero.
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Predictions:
- If the charge of each object was doubled, the magnitude of the electrostatic force between them would increase (be multiplied by four), according to Coulomb's law which states that force is proportional to the product of the magnitudes of the charges.
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Measurements:
- Given the force on object A is \(-0.90i + 0j , N\):
- \(|F_A| = \sqrt{(-0.90)^2 + 0^2} = 0.90 , N\)
- \(|F_B| = |F_A| (newtons are equal in magnitude but opposite in direction for symmetrical charge situations) = 0.90 , N\)
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Direction of Force:
- The negative value indicates the force on A points to the left (since negative is typically used to indicate the leftward direction in a standard Cartesian coordinate system).
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Data Patterns:
- CHECK ALL THAT APPLY:
- When both charges are doubled, the force is multiplied by four.
- When one charge is doubled, the force doubles.
- CHECK ALL THAT APPLY:
These response patterns characterize the nature of electrostatic interactions between charged objects.