Question

(1) A positive charge +3 C is separated from another positive charge of +5 C by a distance of 7m. What is the magnitude of the electric force between the two charges?
(a.) 1.9 × 10 to the 10th power N (b.) 2.8 × 10 to the 9th power N (c.) 2.1 N (d.) 0.31 N

(2) A molecule has 223 electrons and 218 protons. what is the net charge on the molecule ? (a.) 5 × 10 the the - 19th power C (b.) - 5 × 10 to the - 19th power C (c.) 8 × 10 to the - 19h power C (d.) -8 × 10 to the - 19th power C


(3) A negative charge of 2 × 10 to the negative 4 C and a positive charge of 8 × 10 to the negative 4 C are separated by a distance of 0.3 m. what is the magnitude of the force between the charges? (a.) 4800 N (b.) 1.78 × 10 to the - 6th power N (c.) 16000 N (d.) 0.001 N


(4) Which one of these statements is true of a neutral or charged object?

(a.) A neutral object does not have any charged particles in it.

(b.) A neutral object does not have any protons or electrons in it.

(c.) A neutral object has equal numbers of protons and electrons.

(d.) The protons and electrons in a neutral object do not have any charge.

THEY ARE ALL SEPARATE QUESTIONS
THANK YOU

Answer 1

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)

1. How to determine the force

• 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

2. How to determine the net charge on the molecule

• 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

3. How to determine the force

• 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

4. What is a neutral object?

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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