the lake is the rivers body
The correct answer is - False.
The Boreal forest is part of the Taiga biome, not of the Alpine one. It is located on the northern hemisphere, form Norway to the Pacific coast of Russia, and from the pacific to the Atlantic coast of the northern half of North America and it occupies the biggest space compared to any other biome in the world. It is a place where there's short humid summers, and very long, extremely cold, snowy winters. It is a biome where the coniferous forest dominates, and some of the animals that live here are the lynx, bears, wolfs, elk, deer, moos...
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.
