Exercise 3: Time

For a given latitude, if the stated time of sunset is 6:45 p.m. at 90° W, what is the time of sunset at 91° W?

6:49 PM: 91° W to 90° W = 1° later = 4 minutes later = 6:49 PM

If it is Friday at 3:00 p.m. daylight-saving time in Kansas City (90° W), what is the day and time in Quito, Ecuador (75° W), where daylight-saving time is not being observed?

3:00 PM, Friday: 90° W, 3 PM DST, F = 2 PM ST, F 75° W, 3 PM ST, F

Your connecting flight to Taipei (120° E) leaves Los Angeles at 1:00 p.m. on that same day. The flight takes 11 hours. What is the time and day when you arrive in Taipei?

Take off: 120° E, 5 AM, Su 135° E, 6 AM, Su 150° E, 7 AM, Su 165° E, 8 AM, Su 180°, 9 AM, Su/Sa 165° W, 10 AM, Sa 150° W, 11 AM, Sa 135° W, 12 PM, Sa 120° W, 1 PM, Sa Landing: +11 hours = 4:00 PM, Sunday

Your plane leaves Boston (75° W) at 7:00 a.m. on Saturday, bound for Los Angeles (120° W). The flight takes 5 hours. What is the time and day when you arrive in Los Angeles?

Take off: 120° W, 4 AM, Sa 105° W, 5 AM, Sa 90° W, 6 AM, Sa 75° W, 7 AM, Sa Landing: +5 hours = 9:00 AM, Saturday

For a given latitude, if the stated time of sunrise is 6:10 a.m. at 120°00 W, what is the time of sunrise at 117°30 W?

120° W to 117°30' W = 2.5° earlier = 10 minutes earlier = 6:00 AM

If it is 10:00 a.m. Monday in Denver (based on 105° W), what time and day is it in New York City (75° W)?

12:00 noon, Monday: 105° W, 10 AM, M 90° W, 11 AM, M 75° W, 12 PM, M

A satellite image of the United States was taken at "0900Z." What was the local standard time in Chicago (90° W)?

3:00 AM: 90° W, 3 AM 75° W, 4 AM 60° W, 5 AM 45° W, 6 AM 30° W, 7 AM 15° W, 8 AM 0°, 9 AM

If it is 11:00 a.m. Thursday in Seattle (120° W), what time and day is it in Seoul, South Korea (135° E)?

4:00 AM, Friday: 135° E, 4 AM, F 150° E, 5 AM, F 165° E, 6 AM, F 180°, 7 AM, F/Th 165° W, 8 AM, Th 150° W, 9 AM, Th 135° W, 10 AM, Th 120° W, 11 AM. Th