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.
1. Is the temperature contrast between the equator and the Arctic region greatest in the
11. Use the equation: q = m(SH)ΔT to solve for the specific heat of the metal.
SQRT(2 * F * T / H) = (2 * 80 * 200,000 / 1.00)0.5
4.how much and which greenhouse gases are emitted? Can these be reduced? How do these
2) Which of the following statements best describes the effect of climate on biome distribution?
We can assume that the specific heat capacity of water is 4.18 J / (g × °C) and the density of water is 1.00 g/mL.
Because methane is a natural gas which has been involved in the Earth’s earliest atmosphere.
1. (8pts) Is the atmospheric “greenhouse effect” bad for us and for our planet? Explain
The importance of gender equality is not thoroughly acknowledged in a battlefield containing harsh conditions and may lead to death, as the male gender is seen as a better fit in warfare than the female gender. This has been a repertory opinion of the genders throughout history. War is particularly critical of women for supposedly being weaker and less intelligent than men as if women lack the ability to cope with war. Women may generally be seen on the sidelines of war, helping out the injured, but never caught up in the midst of combat. It is thought to be rare to find women interested in warfare. These are the opinions from the medics, who are men, in the short story, “Sweetheart of the Song Tra Bong” by Tim O’Brien. The short story begins
The yield of following reactions for methane is related to the temperature and the amount of natural gas. The mass balance for free carbon and hydrogen is mentioned as
2. When 2.00 g of NaOH were dissolved in 49.0 g water in a calorimeter at 24.0 ˚C, the temperature of the
How many photons are being emitted by the heated squares? Calculate the number of infrared photons that are being emitted by the squares, assuming each photon has an energy of 0.000124 eV.
The greenhouse effect is a natural atmospheric process that has a tremendous impact on Earth. Describe this process, including what causes it, the factors that influence it, and how it affects Earth.
Much like the glass of a greenhouse, gases in our atmosphere sustain life on Earth by trapping the sun 's heat. The Earth’s atmosphere contains several different gases that act like a blanket, keeping the Earth warm. Water vapour and some trace gases like CO2, CH4 (methane), O3 (ozone), N2O (nitrous oxide), are “IR active”, i.e. they absorb heat energy, and stop the warmth from escaping into space. Without the entrapment of heat, the earth’s mean temperature would be -180 C and life, as we know it today, would not be possible. These gases are present in the atmosphere in tiny quantities compared to the amounts of oxygen and nitrogen. But even a small change in the concentration of these gases may create an effect that could change our