21111 Instructor: Prof. Seiberling PHYSICS DEPARTMENT MET 1010

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Instructor: Prof. Seiberling

PHYSICS DEPARTMENT

MET 1010

Name (print, last ¯rst):

Final Exam

Signature:

On my honor, I have neither given nor received unauthorized aid on this examination.

December 20, 2002

(1)

(4)

YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE.

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 student 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.

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. If you believe there is no correct answer listed, leave the answer spaces blank.

(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 each, except one, which is marked 4 points. Good Luck!

1. If the air above a city becomes colder for an extended period, the pressure above the city at 5000 m will most likely

, while the surface pressure will probably .

(1) decrease, increase (2) stay the same, increase (3) increase, increase (4) decrease, decrease (5) increase, decrease

2. The temperature and dew point at the surface are 25 m directly above you is 15

±

±

C and 20

±

C , respectively. The temperature of the atmosphere 2000 what would this atmosphere be called? (The moist adiabatic rate is 6 per 1000 m).

C . Assuming the temperature from the surface to 2000 m changes uniformly with altitude,

± per 1000 m and the dry adiabatic rate is 10

±

C

(1) absolutely unstable (2) conditionally unstable (3) absolutely stable (4) conditionally stable (5) an inversion

3. Winds near an upper level high pressure system in the Southern Hemisphere will blow:

(1) counterclockwise around the high

(2) counterclockwise and outward around the high

(3) counterclockwise and inward around the high

(4) clockwise around the high

(5) clockwise and outward around the high

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4. A parcel of rising air has a temperature of 20

±

C and a dew point of 15

±

C as it passes an altitude of 1000 m. The surrounding temperature of the atmosphere is 22

±

C , and is staying constant with altitude above 1000 m. What is likely to happen to the parcel now?

(1) water vapor in the parcel will immediately condense, forming a stratus cloud

(2) it will accelerate upwards at a faster pace

(3) it will continue upwards at a steady rate

(4) it will form into a cumulonimbus cloud

(5) it will slow its ascent and begin to fall

5. You live on the arctic circle, latitude 66

1

2

± north. Which best describes your day on December 21?

(1) You are in twilight for 24 hours

(2) The sun appears brie°y on the horizon at noon, with the rest of the day either twilight or dark.

(3) The sun is on the horizon for 12 hours and below the horizon for 12 hours.

(4) You are in total darkness for 24 hours.

(5) The sun appears on the horizon for 24 hours.

6. This type of precipitation starts out as snow, melts on its way down, then re-freezes in a deep freezing layer near the surface.

(1) hail (2) snow (3) freezing rain (4) sleet (5) virga

7. A °ag that consists of two red squares, each one having a black square in the middle, represents:

(1) a hurricane watch (2) a gale warning (3) a hurricane warning (4) a storm warning (5) a storm watch

8. Most waterspouts would fall into which category of the Fujita scale?

(1) F4 (2) F2 (3) F1 (4) F0 (5) F3

9. Which statement is NOT true about a land breeze?

(1) They occur when the water is warmer than the land

(2) They occur at night.

(3) They are associated with clouds over the water.

(4) The surface winds are from water to land.

(5) They are associated with an upper level low over the land

10. A tropical storm becomes a hurricane when the winds exceed:

(1) 47 knots (54 mph) (2) 20 knots (23 mph) (3) 88 knots (102 mph) (4) 146 knots (169 mph) (5) 64 knots (74 mph)

11. The fog that forms over lakes in north Florida in early winter when a cP air mass °ows over the lakes is called:

(1) radiation fog (2) evaporation-mixing fog (3) acid fog (4) upslope fog (5) advection fog

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12. Light or moderate-but-steady precipitation is most often associated with

(1) nimbostratus (2) cirrus (3) cirrocumulus clouds.

(4) cumulonimbus

13. As the air temperature increases, with no addition of water vapor to the air, the dew point will:

(1) stay equal to the relative humidity

(2) stay equal to the air temperature

(3) decrease

(4) increase

(5) remain the same

(5) cirrostratus

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14. In a tropical (or easterly) wave:

(1) pressure gradients are large

(2) streamlines depict wind °ow that is generally westerly

(3) cloudiness and rain occur mostly on the western side of a trough of low pressure

(4) a trough of low pressure has the shape of a ridge of high pressure at mid-latitudes

(5) the speed of the wave is generally greater than 100 knots

15. What type of climate tends to prevail on the leeward side of a mountain range at the base of the mountain?

(1) warm and dry (2) cold and dry (3) frequent snow (4) frequent rain (5) moist and cool

16. (4 points) Suppose it is snowing outside and the air is saturated. The air temperature and dew point are both 15

± the actual vapor pressure is 3 mb. If this air is brought indoors and warmed to 75

±

F and

F , what would the relative humidity of this air be, assuming that its moisture content does not change? (The saturation vapor pressure at 75

±

F is 30 mb).

(1) 4% (2) 10% (3) 100% (4) 60% (5) 40%

17. According to the polar front theory of a developing wave cyclone, energy for the storm is usually derived from all but which one of the following:

(1) an increase of surface winds

(2) heat energy stored in the ground

(3) latent heat of condensation

(4) rising of warm air

(5) sinking of cold air

18. In clear weather, the air next to the ground is usually air above during the day.

(1) warmer, colder (2) colder, warmer than the air above during the night , and

(3) the same, the same (4) warmer, warmer than the

(5) colder, colder

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19. A wall cloud:

(1) is a cumulonimbus cloud with a °at top

(2) is a cumulonimbus cloud with straight vertical sides

(3) occurs on the forward edge of a gust front

(4) occurs when a mesocyclone extends below a thunderstorm base

(5) occurs on the leading edge of a squall line

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20. When a beam of white light passes through a glass prism, it is separated into its component colors. This is called:

(1) di®raction (2) selective scattering (3) iridescence (4) re°ection (5) dispersion

21. What type of weather front would be responsible for the following weather forecast: \Increasing high cloudiness and cold this morning. Clouds increasing and lowering this afternoon with a chance of snow or rain tonight. Precipitation ending tomorrow morning. Turning much warmer. Winds light easterly today becoming southeasterly tonight and southwesterly tomorrow."

(1) cold front (2) warm front (3) occluded front (4) stationary front (5) \back door" cold front

22. A sling psychrometer measures:

(1) precipitation (2) wind speed (3) air pressure (4) relative humidity (5) wind direction

23. Forecasting by the analogue method involves:

(1) predicting the weather based on a Prog

(2) assuming that the weather will not change in the near future

(3) recognizing weather features that have occurred before

(4) assuming weather systems will continue to move in the same direction and with the same speed as they have been in the recent past

(5) predicting the weather based on the climate of the region

24. A friend of yours lives on a planet similar to Earth, except the atmospheric pressure at the surface is twice that of Earth.

How would he experience cooking food by boiling?

(1) Things would cook faster than on Earth, because high pressure has a tenderizing e®ect.

(2) Things would cook faster than on Earth, because the boiling water would be hotter.

(3) Things would cook the same as on Earth, because water always boils at 100

±

C.

(4) Things would cook slower than on Earth, because the boiling water would be cooler.

(5) Things would cook slower than on Earth, because the boiling water would be hotter.

25. What is NOT true about satellites?

(1) They can monitor wind direction, even when there are no clouds.

(2) They can be placed in an orbit that is stationary above any desired location on Earth.

(3) They can monitor hurricane movement.

(4) They can detect water vapor, which is invisible to the eye.

(5) They can distinguish high clouds from low clouds.

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26. Geostrophic winds are produced by which two forces?

(1) Coriolis and pressure gradient

(2) pressure gradient and friction

(3) Coriolis and friction

(4) Coriolis and centripetal

(5) pressure gradient and centripetal

27. Which is NOT a factor that might promote hurricane formation?

(1) weak trade wind inversion

(2) humid air

(3) weak upper level winds

(4) warm water

(5) the ITCZ is displaced south of the equator in the Atlantic Ocean

28. Frost forms when:

(1) winds are strong as the temperature falls below freezing

(2) rain freezes before hitting the ground

(3) an unsaturated air parcel drops below freezing

(4) the dew point is reached after the freezing point is reached

(5) dew freezes

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29. The polar front jet stream is located:

(1) above the polar front at the height of the Tropopause

(2) above the polar front at the height of the top of the Stratosphere

(3) at the polar front

(4) where the Hadley and Ferrel Cells meet

(5) south of the subtropical jet stream

30. You are standing on a mountaintop at an elevation of 18,000 ft, where the air pressure is 500 mb. What causes the air pressure where you are standing?

(1) the weight of all of the air molecules in a column from sea level to the top of the atmosphere

(2) radiation pressure from the sun

(3) the ratio of oxygen to nitrogen molecules in the air at your elevation

(4) the weight of all of the air molecules below you

(5) the weight of all of the air molecules above you

31. Evidence suggests that throughout much of the Earth's history, the global climate was:

(1) more variable than it is today

(2) colder than it is today

(3) warmer than it is today

(4) less variable than it is today

(5) about the same temperature as it is today

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32. Two ob jects, A and B, have the same mass, but the speci¯c heat of B is larger than A. If both objects absorb equal amounts of energy:

(1) A will become warmer than B

(2) both A and B will warm at the same rate

(3) B will get warmer and A will get colder

(4) B will become warmer than A

(5) A will get warmer and B will get colder

33. Clouds infrared radiation and

(1) transmit, emit (2) re°ect, re°ect visible radiation.

(3) absorb, re°ect (4) absorb, absorb (5) re°ect, absorb

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