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: The correct answer is : (2) all inorganic rocks except igneous rocks are formed from other rocks
Explanation: Igneous rocks are formed by the solidification of magma, the process is slow if it is in the crust and fast if it is on the surface.
Sedimentary rocks are formed on the surface of the earth by processes of erosion and alteration of pre-existing rocks.
Metamorphic rocks have been formed by the evolution of another previous rock due to the environment to which it is subjected that may be hotter, colder or of a different pressure.
The Answer is D Hope This Help
Hello.
The answer is <span>amount of pressure placed on it during formation
Have a nice day</span>
Answer:
C is probably the best answer
