Total power: $P = 15 \times 40 + 5 \times 100 + 5 \times 80 + 1 \times 1000 = 600 + 500 + 400 + 1000 = 2500\,\text{W}$

Total current: $I = \frac{P}{V} = \frac{2500}{220} \approx 11.36\,\text{A}$

The fuse must safely carry this current. The smallest standard value that is greater than or equal to 11.36 A from the options is 12 A. Answer: A.

Neonatal Resuscitation Program (NRP) — Algorithm:

1. Initial steps (warm, dry, stimulate, position, clear airway) — 30 seconds
2. Assess: breathing, HR
3. HR \(<100\,\text{bpm}\) or apnea → Start PPV with 21% O₂ (room air) for 30 seconds
4. After 30 sec PPV: Reassess HR
   • HR \(\geq 100\): Continue PPV, wean O₂
   • HR \(60{-}99\): Ensure effective ventilation (MRSOPA), continue PPV
   • HR \(<60\) after 30 sec effective PPV → Start chest compressions + PPV
5. Chest compressions:
   • Technique: 2-thumb encircling (preferred) or 2-finger method
   • Ratio: 3 compressions : 1 ventilation (90 compressions + 30 breaths = 120 events/min)
   • Depth: \(\frac{1}{3}\) of AP chest diameter
6. After 60 sec compressions + PPV: If HR still \(<60\) → Epinephrine (IV preferred: \(0.01{-}0.03\,\text{mg/kg}\) of 1:10,000 solution)

Note: Adult CPR ratio is 30:2, but neonatal is 3:1 because neonatal arrest is usually respiratory in origin.

Average collision time $\tau = \frac{\lambda}{v_{rms}}$.

Mean free path $\lambda \propto \frac{1}{n} \propto V$.

Root mean square velocity $v_{rms} \propto \sqrt{T}$.

For an adiabatic process, $T \propto V^{-(\gamma-1)}$. So, $v_{rms} \propto V^{-\frac{\gamma-1}{2}}$.

Therefore, $\tau \propto \frac{V}{V^{-\frac{\gamma-1}{2}}} = V^{1 + \frac{\gamma-1}{2}} = V^{\frac{\gamma+1}{2}}$.

Thus, $q = \frac{\gamma+1}{2}$.

• Ti⁺: [Ar]3d³ → lose 3d electron
• V⁺: [Ar]3d⁴
• Cr⁺: [Ar]3d⁵ (half-filled, very stable) → IE₂ very high
• Mn⁺: [Ar]3d⁶ → less stable than half-filled