test_4_written_090505_final_solns

test_4_written_090505_final_solns - EATS 1011 3.0...

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EATS 1011 3.0 Introduction to Atmospheric Science TEST 4 1 of 4 5/5/2009 YORK UNIVERSITY FACULTY OF SCIENCE Department of Earth and Space Science and Engineering EATS1011 3.0 Introduction to Atmospheric Science Test 4 - Written - 25 minutes ~ 11:00-11:25 AM Vari Hall A, 5 th May, 2009 Answer two (2) questions. There are 3 possible choices, all with equal marks. Also you must hand in all two (2) answer sheets. But you may keep the questions. Useful quantities that you may need. Permitted Aids: A calculator and a standard dictionary. Universal gas constant R* = 8.3143x10 3 Jdeg -1 kmol -1 The Gas Constant for a molecule of mass, m, R = R*/m (kmole/kg) The Gas Constant for air is 287 J.deg -1 kg -1 Surface area of a sphere of radius r = 4 π r 2 . Circumference of circle of radius r = 2 π r. 1 AU = 1.50x10 8 km. Speed of light = 3.0x10 8 m/s. Density of air at MSL, ρ air = 1.2 kg m -3 . Molecular weight of CO 2 = 44 Gravity on Mars = 3.7 m s -2 p = ρ RT Density of liquid H 2 O: ρ H2O = 10 3 kg/m 3 The scale height, H = RT/g metres Mean acceleration due to gravity on the Earth: g = 9.8 m s -2 The Hydrostatic Law: p(z) = p(0).exp(-z/H) where H is the scale height Latent heat of Fusion for water ice = 335,000 J/kg Saturated adiabatic lapse rate, Γ M = 6°C /km (nominal). Solar Constant, E = 1.38 kJ m -2 s -1 . Mean radius of Earth = 6370 km Degrees Kelvin = degrees C + 273 1 year = 3.16x10 7 s. Terminal velocity V T = 1.4x10 8 xR 2 (m) m/s (R < 100 μ m) = 6.0x10 3 xR(m) m/s (R> 100 μ m) 1 mb = 100 Pascals The scale height, H = RT/g metres Mean acceleration due to gravity on the Earth: g = 9.8 m s -2
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EATS 1011 3.0 Introduction to Atmospheric Science TEST 4 2 of 4 5/5/2009 Do 2 questions only 1. Discuss briefly the formation of rain (assume cloud droplets have formed) in both “warm” and “cold” (multiphase) clouds complete with diagrams. What distinguishes a cloud droplet from a rain drop? If a 1 mm rain drop falls through 1 km in 2.8 minutes,
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test_4_written_090505_final_solns - EATS 1011 3.0...

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