Define specific heat capacity.
Solar energy is striking the flat aluminum roof of a building.
Describe how the colour or finish of the roof surface affects the absorption of solar energy.
The solar energy strikes the roof at the rate of 1100 W1100\text{ W}1100 W on every square metre.
The aluminum plate of the roof is 0.0080 m0.0080\text{ m}0.0080 m thick.
Aluminum has a density of 2700 kg/m32700\text{ kg/m}^32700 kg/m3 and a specific heat capacity of 900 J/(kg ∘C)900\text{ J/(kg\ }^\circ\text{C)}900 J/(kg ∘C).
18%18\%18% of the solar energy striking the roof is absorbed and the rest is reflected.
Using these figures, calculate:
The solar energy strikes the roof at the rate of 1100 W1100\text{ W}1100 W on every square metre.
The aluminum plate of the roof is 0.0080 m0.0080\text{ m}0.0080 m thick.
Aluminum has a density of 2700 kg/m32700\text{ kg/m}^32700 kg/m3 and a specific heat capacity of 900 J/(kg ∘C)900\text{ J/(kg\ }^\circ\text{C)}900 J/(kg ∘C).
18%18\%18% of the solar energy striking the roof is absorbed and the rest is reflected.
Using these figures, calculate:
The solar energy strikes the roof at the rate of 1100 W1100\text{ W}1100 W on every square metre.
The aluminum plate of the roof is 0.0080 m0.0080\text{ m}0.0080 m thick.
Aluminum has a density of 2700 kg/m32700\text{ kg/m}^32700 kg/m3 and a specific heat capacity of 900 J/(kg ∘C)900\text{ J/(kg\ }^\circ\text{C)}900 J/(kg ∘C).
18%18\%18% of the solar energy striking the roof is absorbed and the rest is reflected.
Using these figures, calculate:
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.