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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