NOT
the election of a democratic leader in the Arab state of Tunisia.
MAYBE
the adoption of a democratic-leaning constitution in Libya.
Answer:
Explanation:
GIS stands for Geographic Information Systems.
GIS is an environment which is used for collecting, storing, manipulating, analyzing and visualizing geographical data.
The most important aspect of GIS is its capability in handling data with locational attributes which are geographical data.
To use data from the database from a chain of hardware stores, the data must be tied to their respective location i.e they must locational attributes.
Answer:
<u>Geocentric Model</u>: - this model is Earth Centered
-Retrograde motion is explained by epicycles
<u>Heliocentric Model</u>: - This model is Sun Centered
-Retrograde motion is explained by the orbital speeds of planets
<u>Both models</u>:- Epicycles and deferents help explain planetary motion
-Planets move in circular orbits and with uniform motion
-The brightness of a planet increases when the planet is closest to Earth
Explanation:
Retrograde motion is an apparent change in the movement of the planet through the sky. Ptolemy's model of the solar systems was geocentric, where the Sun, Moon, planets and start all orbit the Earth in perfectly circular orbits. However this perfectly circular orbits around the Earth did not explain the occasional retrograde motion of the planets. In the Copernicus' heliocentric model, retrograde motion of planets is naturally explained. The explanation for retrograde motion in a heliocentric model is that retrograde occurs roughly when a faster moving planet catches up to and passes a slower moving planet.
1. Solar energy, wind energy, bio-fuels
2. Coal, natural gases, steel
