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:
119 exam-style questions on CIE IGCSE Physics 2.2.2a Internal energy and temperature. Each one has a worked solution and a mark scheme showing where the marks go.