Call the capacitance C.
<span>Note the energy in a capacitor with voltage V is E =½CV². </span>
<span>Initial energy = ½C(12)² = 72C </span>
<span>40% of energy is delivered, so 60% remains.in the capacitor. </span>
<span>Remaining energy = (60/100) x 72C =43.2C </span>
<span>If the final potential difference is X, the energy stored is ½CX² </span>
<span>½CX² = 43.2C </span>
<span>X² = 2 x 43.2 = 86.4 </span>
<span>X = 9.3V</span>
Answer:
The sodium forms cations and chlorine forms anions.
Explanation:
- During the formation of the bonding, the sodium atom loses one electron and forms a positively charged ion called cation.
- The chlorine atom receives one electron and forms a negatively charged ion called anion.
- The electro-negativity of the atom determines the bonding nature of the atoms.
- In case of sodium and chlorine, it forms the ionic bonding where there is a transfer of an electron from one atom to the other.
- Hence the charge is given by Na⁺ and Cl⁻
I believe the answer is going to B I hope this helps and good luck
C it is transformed into chemical energy
