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Instructor: Prof. Seiberling
PHYSICS DEPARTMENT
MET 1010
2nd Midterm Exam
Name (print, last ¯rst):
October 27, 2003
Signature:
On my honor, I have neither given nor received unauthorized aid on this examination.
YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE.
(1) Code your test number on your answer sheet (use 76{80 for the 5-digit number). Code your name on your
answer sheet. DARKEN CIRCLES COMPLETELY. Code your UFID number on your answer sheet.
(2) Print your name on this sheet and sign it also.
(3) Do all scratch work anywhere on this exam that you like. At the end of the test, this exam printout is to be turned in.
No credit will be given without both answer sheet and printout with scratch work most questions demand.
(4) Blacken the circle of your intended answer completely, using a #2 pencil or blue or black ink. Do not make
any stray marks or the answer sheet may not read properly.
(5) The answers are rounded o®. Choose the closest to exact. There is no penalty for guessing.
>>>>>>>>WHEN YOU FINISH <<<<<<<<
Hand in the answer sheet separately.
There are 33 multiple choice questions. Clearly circle the one best answer for each question. If more than one answer is
marked, no credit will be given for that question, even if one of the marked answers is correct. Guessing an answer is better
than leaving it blank. All questions are worth 3 points, except for one question, which is worth 4 points. The 4-point question
is clearly indicated. Good Luck!
±
1. The sea surface temperature o® of the coast of Peru varies by about
(1) 29
(2) 2
(3) 15
2. Another way to indicate a southwesterly wind is a
(1) 90 ±
(2) 180 ±
C from an El Nino to a La Nina condition.
(4) 8
(5) 22
(4) 45 ±
(5) 225 ±
wind.
(3) 270 ±
3. Upwelling o® of the coast of Peru is caused by:
(1)
(2)
(3)
(4)
(5)
a
a
a
a
a
warm current °owing south on the western side of South America
warm current °owing north on the western side of South America
cold current °owing north on the eastern side of South America
cold current °owing north on the western side of South America
cold current °owing south on the western side of South America
4. On the west coast of Florida, a land breeze would be
(1) westerly
(2) northerly
.
(3) southerly
(4) easterly
5. If city A is hot and neighboring city B is cold, surface winds will blow from
.
(1) B to A, A to B
(2) neither city, A to B
(3) B to A, neither city
(5) vertical
and winds aloft will blow from
(4) A to B, neither city
(5) A to B, B to A
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6. An ideal gas in a closed container of volume V has a pressure P and a temperature T. The volume of the container is
doubled with no gas molecules either entering or leaving the container. This volume expansion decreases the temperature.
If the temperature is brought back to T by adding heat, what is the new pressure?
(1) P/2
(2) 2P
(3) 4P
(4) P
(5) P/4
7. According to the 3-cell model of general circulation, rising air should occur at:
(1) 30 ± and the poles (2) the equator and 60 ± (3) the equator and the poles (4) the equator and 30 ± (5) 30 ± and 60±
8. Snow°akes are in the form of dendrites because:
(1)
(2)
(3)
(4)
(5)
the dendrite form is the only common form for ice growth
snow°akes are so small
all forms of ice that fall from clouds are dendrites if you look under a microscope
dendritic growth is preferred in the glaciated regions of clouds
ice grows preferentially in that form at the temperature for which the ice-crystal pro cess is most e±cient
9. Cyclonic wind refers to:
(1)
(2)
(3)
(4)
(5)
any wind associated with a force 3 or greater storm
CCW °ow around a high
CCW °ow around a low
any wind over 40 knots
CW °ow around a high
10. Coalescence refers to:
(1)
(2)
(3)
(4)
(5)
the
the
the
the
the
collection of bands of di®ering density in hailstones
di®usion of water vapor toward growing ice crystals
fact that rain smells like coal in industrial areas
merging of cloud droplets into fast moving raindrops
merging of supercooled cloud droplets into ice crystals
11. If a mountain range runs north-south, and the prevailing winds are easterly, the weather on the east side of the mountains
would be
and that on the west side would be
.
(1)
(2)
(3)
(4)
(5)
cool and dry, warm and wet
cool and wet, warm and dry
pretty much the same on both sides
warm and dry, cool and wet
warm and wet, cool and dry
12. On the windward side of an obstruction
(1)
(2)
(3)
(4)
(5)
the
the
the
the
the
, and on the leeward side
pressure is reduced, the air is turbulent
pressure is reduced, the pressure is increased
pressure is increased, the air is turbulent
pressure is increased, the pressure is increased
air is turbulent, the pressure is increased
.
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13. For this problem and the next three problems, refer to the following information: One day the environmental
lapse rate is 11 ± C/1000m from the surface up to 2000m, then 4± C/1000m above 2000m. The surface temperature and
dew point are 30 ± C and 26± C, respectively. (The dry adiabatic rate is 10 ± C/1000m and the moist adiabatic rate is
6 ± C/1000m.)
What would the stability of this atmosphere be above 2000m?
(1) absolutely unstable (2) conditionally stable (3) conditionally unstable (4) marginally stable (5) absolutely stable
14. At what height above the surface is the condensation level?
(1) 1000m
(2) 500m
(3) 2000m
(4) 1500m
(5) 3000m
15. (4 points) What are the temperature and dew point inside the cloud at a height of 2000m? (T± C, T dew ± C)
(1) 14, 14
(2) 8, 8
(3) 16, 16
(4) 16, 22
(5) 8, 14
16. What is the temperature of the surrounding atmosphere at a height of 2000m? (in ± C)
(1) 8
(2) 12
(3) 20
(4) 24
(5) 16
17. The lines of primary importance on a 500mb map are:
(1) isobars
18. The
(1)
(2)
(3)
(4)
(5)
(2) height contours
causes geostrophic winds to blow
(3) isotachs
(4) isotherms
the pressure gradient force.
friction force, perpendicular to
friction force, parallel to
Coriolis force, perpendicular to
centripetal force, parallel to
wind force, parallel to
19. Which is NOT a signi¯cant factor in rain formation by the collision-coalescence process?
(1)
(2)
(3)
(4)
(5)
a large vertical extent in the cloud
large updrafts
the electric charge of the droplets
a range of droplet sizes
a large region of glaciation
20. What is NOT a major factor in creating global wind patterns?
(1)
(2)
(3)
(4)
(5)
the
the
the
the
the
presence of land masses
unequal heating of di®erent parts of the earth
rotation of the earth about its axis
tilt of the rotation axis of the earth
speed of the earth in orbit around the sun
(5) isomers
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21. A mountain breeze:
(1)
(2)
(3)
(4)
(5)
blows up on the windward side
blows horizontally across the mountain top
blows up on both sides
blows up on the leeward side
blows down on both sides
22. The Doppler e®ect in radar measures:
(1)
(2)
(3)
(4)
(5)
the size of precipitation
the motion of precipitation toward and away from the detector
the total amount of water in the cloud
how likely the cloud is to grow in strength
the distance to precipitation
23. The polar front refers to:
(1)
(2)
(3)
(4)
(5)
convergence of air aloft near 60 ±
cold fronts that originate on ice ¯elds near 80 ±
convergence of surface air near 60 ±
cold fronts that originate near the poles
convergence of air aloft near 30 ±
24. The largest authenticated hailstone in the history of the United States:
(1)
(2)
(3)
(4)
(5)
weighed almost 1 pound
fell this year
fell in Co®eyville, Kansas in 1970
spent less than 5 minutes in the cloud
fell in Florida
25. The main force responsible for surface ocean currents is:
(1) the Ekman spiral (2) the pressure gradient force (3) friction with the wind (4) the Coriolis force (5) upwelling
26. Large raindrops fall
(1) last, smaller
from a cloud because they have a
(2) ¯rst, nonexistent
terminal velocity.
(3) ¯rst, smaller
(4) last, larger
(5) ¯rst, larger
27. A gradient wind aloft blows around a high pressure area. The centripetal force is equal to:
(1) F cor - PGF
(2) the PGF
(3) PGF - Fcor
(4) the F cor
(5) the net outward force
28. The geostrophic winds in the mid-latitudes of the southern hemisphere are:
(1) CW
(2) westerly
(3) southerly
(4) easterly
(5) northerly
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29. A strong La Nina condition is associated with
(1) cool and wet
(2) warm and dry
weather in winter the southeastern United States.
(3) stormy
(4) normal
(5) bitter cold
while windspeed higher up is
.
30. The Labrador current
(1)
(2)
(3)
(4)
(5)
is
is
is
is
is
a
a
a
a
a
cold current that °ows south
cold current that °ows in a shape resembling a dog
cold current that °ows north
warm current that °ows south
warm current that °ows north
31. During turbulent conditions, windspeed near the surface is
(1) increased, decreased (2) increased, increased (3) decreased, decreased (4) increased, not changed (5) decreased,
increased
32. During a storm with winds of 25 knots, the force of the wind on an apartment wall was 5000 pounds. Later, a hurricane
with winds of 75 knots blew against the wall. What was the force on the wall due to the hurricane winds?
(1) 45,000 pounds
(2) 20,000 pounds
(3) 35,000 pounds
(4) 40,000 pounds
(5) 30,000 pounds
33. For several days over a large area, the ground has grown cold through radiative cooling while warmer air has advected
to the area aloft. What atmospheric conditions would be expected in this area?
(1)
(2)
(3)
(4)
(5)
air will readily mix in the unstable atmosphere
haze and pollution will collect in a layer near the surface
nimbostratus clouds will form bringing light rain and drizzle
air will readily mix in the stable atmosphere
cumulonimbus clouds will form bringing thunderstorms