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Miami Dade College, Miami *

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Course

1210

Subject

Electrical Engineering

Date

Feb 20, 2024

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Uploaded by ChancellorFish4041

e om0 1B > Chap.ee: veonvccnmavann 1. Read page 6, concerning the greenhouse effect. Explain why the author disagrees with the phrase "Greenhouse Effect", when comparing global warming to a greenhouse. + The author disagrees with the phrase when comparing to global warming because a real greenhouse is enclosed, it does not allow convection to carry away heat and cool the inside. This is where a true “greenhouse” effect fundamentally differs from what happens in our atmosphere . 2. Refer to figure 1-6 on page 7. How much closer to the sun is the earth in the northern hemispheres winter than it is in the summer? + The sunis 91.1 million miles away in northern hemisphere winter , and 94.8 million miles away in northern hemisphere summer. It is 3.7 million miles closer . 3. Explain why it is hotter during the northern hemisphere's summer, even though the earth is further from the sun than in winter. (P7) + Due to the curvature of the Earth, solar radiation is absorbed differently at different point. our entire planet is canted on its axis by 23.5 degrees. It is why we have seasons. In the summer, the northern hemisphere is tilted toward the Sun which means that the Sun's rays hit this part of the Earth's surface more directly. Since there is more direct sunlight, more of the Sun's energy is absorbed by the land surface . 4. Why are cloudy nights warmer than clear nights with all other conditions being the same? (P7) + Because at night, when there is no incoming solar radiation, the earth continues to radiate its heat, causing temperatures to decrease. clouds radiate this heat back, which is why cloudy nights are warmer than clear ones . 5. The earth is tilted approximately 1-6) degrees from its orbital plane around the sun. (Figure + 235. 6. You depart the KTMB airport at high noon on a hot sunny day heading towards Biscayne Bay. What kind of ride can you expect over land and over water? (P 7-8) + Water and land have different heating abilities. Water takes a bit more time to warm up and is able to retain the heat longer than land does. During the day, when the sun is up, the land heats up very quickly and the air above it warms up a lot more than the air over the water. The warm air over the land is less dense and begins to rise. Low pressure is created. Less dense air gives lesser aircraft performance. air over water will tend to stay cooler and not rise, creating an area of relatively higher pressure. Higher air density will give better aircraft performance 7. Pilots are taught that the ICAO temperature lapse rate is 2 degrees per every 1000 feet of altitude gained. Remember that this is an average rate. According to the Pilot Weather book, what is the actual temperature lapse rate carried out to 2 decimal places? (P10) + 1.98°C per 1,000 feet 8. Aircraft in the U.S., Canada and Mexico, use inches of mercury to correct their altimeters to non- standard pressure. What pressure unit of measure is used to correct the altimeters for non- standard pressure in most countries? (P31) Pilots outside the U.S, Canada and Mexico — including those in the Caribbean — set their altimeters to measure in milli-bars (hectopascals). 9. What is the device shown in figure 4-3 on page 32, and what is its purpose? + A barograph. it is a barometer that records the barometric pressure over time in graphical form . 10. What weather report uses the data of the above device? + Barographs may be usedto record elevation changes during an aircraft flight. Barographs were required by the FAI to record certain tasks and record attempts associated with sailplanes .

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