Exams › NEET › Physics

The density of water at 20°C is 998 kg/m³ and at 40°C 992 kg/m³. The coefficient of volume expansion of water is:

1. 10⁻⁴/°C
2. 3 × 10⁻⁴/°C
3. 2 × 10⁻⁴/°C
4. 6 × 10⁻⁴/°C

Correct answer: 2 × 10⁻⁴/°C

Solution

The coefficient of volume expansion is calculated using the formula β = (Δρ / ρ₀) / ΔT. Substituting the given values: Δρ = 998 - 992 = 6 kg/m³, ρ₀ = 998 kg/m³, and ΔT = 40°C - 20°C = 20°C, we get β = (6 / 998) / 20 ≈ 2 × 10⁻⁴/°C.

Related NEET Physics questions

• An instrument used to measure high temperature is
• Ocean currents are caused by the setting up of in water
• For the same mass, which one of the following has the maximum thermal capacity?
• The excess temperature of a body falls from \( 12^{\circ} \mathrm{C} \) to \( 6^{\circ} \mathrm{C} \) in 5 minutes, then the time to fall the excess temperature from \( 6^{\circ} \mathrm{C} \) to \( 3^{\circ} \mathrm{C} \) is (assume the Newton's cooling is valid)
• Bunty mixed 440 gm of ice at \( 0^{\circ} \mathrm{C} \) with \( 540 \mathrm{gm} \) of water at \( 80^{\circ} \mathrm{C} \) in a bowl. Then what would remain after sometime in the bowl?
• Mercury boils at \( 356^{\circ} \mathrm{C} \). However mercury thermometers are made such that they can measure temperatures up to \( 500^{\circ} \mathrm{C} \). This is done by :

⚔️ Practice NEET Physics free + battle 1v1 →