Answer: I believe that physical geography is what we are more familiar with as it involves the earth's land areas, bodies of water, plant life, etc. Physical geographers help in making decisions about managing different types of resources such as water, forests, and land. Human geography is more about people's religion, culture, way of life.
Explanation: I tried my best at answering that.
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.
Answer:
False
Explanation: Fish can't swim up the stream. Pond plants & animals would start to live there instead of stream plants & animals.
I think it’s D
Sorry if I’m wrong
People use to believe the universe was centered around the Earth. BUt now with modern technology we know that it is obviously not.
