Bong Ro

8818 Words36 Pages
IB Questionbank Physics Energy, Power and Climate 1. In which of the following places will the albedo be greatest? A. B. C. D. A forest A grassland An ocean A polar ice cap (Total 1 mark) 2. A spherical black body has absolute temperature T1. The surroundings are kept at a lower absolute temperature T2. What is the net power per unit area lost by the body? A. B. C. D. σT14 σT24 σ(T14 – T24) σ(T14 + T24) (Total 1 mark) IB Questionbank Physics 1 3. What is the unit of surface heat capacity? A. B. C. D. J kg–1 K–1 J K–1 J m–2 K–1 J m–3 K–1 (Total 1 mark) 4. Surface X has a temperature TX and emissivity εx. Surface Y has a temperature TY and emissivity εy. The two surfaces emit radiation at the same rate. What is the ratio TX ? TY…show more content…
......................................................................................................................... ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... (2) (e) Methane is classified as a greenhouse gas. (i) Describe what is meant by a greenhouse gas. ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... (2) (ii) Electromagnetic radiation of frequency 9.1 × 1013 Hz is in the infrared region of the electromagnetic spectrum. Suggest, based on the information given in (b)(ii), why methane is classified as a greenhouse gas.
Open Document