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.
South east is the direction from A-E
PLS ADD BRAINIEST
Since WWII, Germany's eastern territories became apart of Poland. "Central Germany" is usually defined as being apart of the federal states of Saxony Thuringia and Saxony-Anhalt. It has even been said to be apart of a smaller part of this region, such as the metropolitan area of Leipzig and Halle as well as surrounding countries.
Answer:
The answer is a) oil
Explanation:
Oil, especially in these areas, are abundant. In the past, these areas became wealthy because of oil.
Answer:
The tomatoes didn't come from the Old World during The Columbian Exchange.
Explanation:
During the time of The Columbian Exchange, thousands of goods found their way across the Atlantic, be it from one side or the other. This was very beneficial for both sides, with the Old World and the New World getting goods that imporoved the lives of the people. One of the most popular and nowadays among the most used goods, the tomato, came from the New World and was introduced in the Old World.
The tomatoes originated as a wild plant in the Andes, on the territories of modern-day Ecuador, Peru, Bolivia, and Chile. The people living in this region saw their potential and started to cultivate them, and seeing what a delight they are, other people from other parts of the New World started to cultivate them as well. The people of the Old World though were skeptical about the tomatoes initially and were not very fond of them, and they even thought that when they start to go red they are getting spoiled. Over time, this changed as people saw that they have a wonderful food product, so the tomato became one of the most popular goods.
