Matching units to physical quantities

Steps:

• Identify the quantity: The question refers to "the quantity shown," but no specific quantity or diagram is provided.
• Recall standard units: Electromotive force uses volts (V), latent heat uses J/kg, pressure uses Pa (N/m² or kg/(m·s²)), weight uses newtons (N).
• Compare choices: Option A lists N (force unit), B lists J/kg (energy per mass), C lists kg/m² (not standard pressure), D lists kg (mass, not weight).
• Conclude: Without the shown quantity, units cannot be definitively matched.

Why B is correct:

• Not enough information to confirm, but latent heat is defined as energy required to change phase per unit mass, with SI unit J/kg.

Why the others are wrong:

• A: Electromotive force is measured in volts (V), not newtons (N, a force unit).
• C: Pressure is force per area, correctly Pa (kg/(m·s²)), not kg/m² (surface density).
• D: Weight is gravitational force, measured in newtons (N), not kilograms (kg, a mass unit).

Final answer: Not enough information.