vdide at thé poles is O. At latitudes between the equator and the poles, the cos
ID: 152918 • Letter: V
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vdide at thé poles is O. At latitudes between the equator and the poles, the cos lies somewhere between 1 and o. Note also that the cosine becomes progressively smaller equator poleward. This cosine function identifies the portion of 69 miles that is equal to the width of a degree of longitude at various latitudes from the Examine travel route 1 in Fiqure 2.2 at 30° north between the two lines of longitude that are 45" apart. First decide how many miles are in a degree at 30° North. This is done by multiplying 69 miles (the number of miles in a degree at the equator) by the cosine of the latitude (30). The cosine of 30 is 0.866. 69 miles/degree x cos 30 69 miles/degree x 0.866-59.8 miles/degree This means that at 30e North (or South), there are 59.8 miles in each degree of longitude. You woul to know how many miles there are in 45° of east-west travel at that latitude. is multiply: d like So now all you need to do 59.8 miles/degree x 45 2,689 miles 6. Answer the following Calculate the number of miles between the prime meridian (zero degrees) and a point 45 degrees east along the 30 degree parallel (cos 30 - 0.866). a. b. Calculate the number of miles between the same number of degrees of longitude (459) along 0.5) the 60 degree parallel (cos 60°Explanation / Answer
Answer 6a) The number of miles is 59.8×45×cos30=409miles
Answer6b) The number of miles is 59.8×45×cos60 =1345.6miles.
Answer 7) There is a cyclical relationship between the passage of time and the rotation of the earth on its axis. It takes th 23hours and 56minutes for the earth to complete one rotation on its axis.T he earth is always in its daily and yearly rotations.The phenomenon is a cyclical one, where the difference between apparent time and solar time gives the equation of time. One complete rotation is completed by the earth in one solar day. Thus 365 rotations in a year.
Answer 8)In total there are 360 meridians or longitude in earth
Rotation of the earth takes 24hours.
Thus in 24 hr 360 merian pass beneath the sun
In 1 hour the number of meridian tgat pass beneath the sun is360/24=15meridians
Answer 9a)75°W
9b)Greenwich Meantime 90° longitude
9c)105°
9d)120°
9e)same as Hawai -Auleitian time zone of 169°30'W
9f)169°30'W
Answer10)
a)12pm Tuesday
b)10am Tuesday.
c) 7pm Tuesday
d)8pm Tuesday
e)5pm Tuesday
Answer 11)5.00PM Thursday December 15
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