Explanation: climatology is not a branch of human geography.
Answer:
Two stars (a and b) can have the same luminosity, but different surface area and temperature if the following condition is met:
(T_a^4)(R_a^2) = (T_b^4)(R_b^2)
Explanation:
The luminosity of a star is the total energy that produces in one second. It depends on the size of the star and its surface temperature.
L = σ(T^4)(4πR^2)
L is the luminosity f the star, T is the temperature of the surface of the star and R is its radius.
Two stars can have the same luminosity if the relation between the radius and the surface temperature is maintained.
To see this lets suposed you have 2 stars, a and b, and the luminosities of each one of them:
L_a = σ(T_a^4)(4πR_a^2)
L_b = σ(T_b^4)(4πR_b^2)
you can assume that L_a and L_b are equal:
σ(T_a^4)(4πR_a^2) = σ(T_b^4)(4πR_b^2)
Now, you can cancel the constants:
(T_a^4)(R_a^2) = (T_b^4)(R_b^2)
as long as this relation between a and b is true, then the luminosity can be the same.
The correct answer is South America.
Explanation
The graph shows the change in forest cover across various regions such as Eastern and Southern Africa, Northern Africa, Western and Central Africa, East Asia, South and Southeast Asia, Western and Central Asia, Europe, Caribbean, Central America, North America, Oceania and South America of the world between 1990 and 2010 (divided into four groups 1990, 2000, 2005 and 2010). According to the graph the region with less change in forest cover is North America because through those years, there were close to 700.000 Ha; the region with the most increase of forest cover is East Asia because in 1990 there were close to 200.000 Ha and in 2010 there were close to 270.000 Ha, and the region with the most decrease of forest cover is South America because in 1990 there were close to 930.000 Ha and in 2010 there were close to 850.000 Ha. According to the above, the correct answer is South America.
They are formed by subduction
The path of totality, where the Moon will completely cover the Sun and the Sun's atmosphere (corona) can be seen.
