Using the analemma, answer the following questions:
1. Determine how much the declination of the Sun changes during the following 10-day periods.
2. Based on your calculations in problem 1, as well as your general observations of the analemma, answer the following questions:
(a) During which two times of the year (six months apart) is the declination of the Sun changing most rapidly from one day to the next? (You may name the two months of the year when declination changes most rapidly, or name the two special days of the year around which declination changes most rapidly.)
(b) During which two times (or months) of the year (six months apart) is the declination of the Sun changing most slowly?
3. Solar altitude and length of day are related to the declination of the Sun. Using the analemma and your answers for problems 1 and 2 for reference, answer the following questions:
(a) How much does the solar altitude in your city change over the following 10-day periods? (Hint: No new calculations are necessary; see your answers to problem 1.)
12/12 to 12/22: ____________ 3/20 to 3/30: ____________
(b) During which two times of the year (six months apart) does solar altitude and length of day change most rapidly from one day to the next?
(c) During which two times of the year (six months apart) does solar altitude and length of day change most slowly?
4. It is May 5 and you are somewhere in the Northern Hemisphere. If you determine that the noon Sun is 51° above your southern horizon, what is the latitude of your location?
1.
2. (a) Around the time of the equinoxes.
2. (b) Around the time of the solstices.
3. (a) 12/12 to 12/22: 0.5° 3/20 to 3/30: 4.0°
3. (b) Around the time of the equinoxes.
3. (c) Around the time of the solstices.
4. 55° N
Declination = 16° N
Arc distance = 90° – 51° = 39°, so 16° N + 39° = 55° N
You might also like to view...
Transpiration refers to
A) the movement of free water molecules away from a wet surface. B) runoff. C) an amount of moisture loss from the surface that cannot be measured. D) the outward movement of water from plant leaves. E) evaporation.
All of the following are actions that the country of Bangladesh is implementing to adapt to sea level rises due to climate change except
a. using varieties of rice that can better tolerate flooding b. shifting to new crops such as maize c. building small ponds that can collect monsoon rainwater to be used for irrigation during dry periods d. creating a network of earthen embankments to protect against high tides e. develop a system of capturing wave action during monsoons to run small, local power plants
What could happen to strike-slip faults at depth?
What will be an ideal response?
Which magma type usually erupts from fissures? What will be an ideal response?