homework

1. Solar angle shown in Figure 1 as measured with a protractor is 55 degrees.
2. Position    Solar Angle (in degrees)
A        90
B        60
C        30
D        15
3. The position A creates the most direct solar radiation to the Earth’s surface.
4. According to figure 2, the greatest surface heating occurs at position A.
5. A) The farthest north the Sun’s direct rays reach during the year is 23.5 degrees north (Tropic of Cancer).
The farthest south the Sun’s direct rays reach during the year is 23.5 degrees south (Tropic of Capricon).
b) The far northernmost and southernmost solar positions occur on Solstices.
6. A) Sun’s direct rays (90 degrees) strike the equator twice a year.
b) The equatorial direct rays occur on the equinoxes.
7. A) The latitude of century college is 45oN 93oW.
b) No. Century College never receives direct 90 degrees solar radiation.
Solar declination = 23.5 * Sin(N) where N is the number of days to the nearest equiox. Nis positive if the date of interest is between March21 and Sep 21. N is negartive if the date of interest is between 21 Sep and 21 March.
8. Date        Days from Equinox    Sin(N)    Solar declination
January 10     71            -0.946    -22.2312 o
May 3         43            0.682    16.027 o
October 27     -36            -0.588    -13.818 o
Your birthday
9. Date        Other Day of the year which has...