Answer:
100 times brighter
Explanation:
The apparent luminosity of a star follows the inverse square law, which means that the luminosity is inversely proportional to the square of the distance:
where r is the distance.
In this problem, star A and star B have same intrinsec luminosity, but star B is 10 times farther than star A:
We can write the luminosity of star A as follows:
While the luminosity of star B will be:
Substituting :
So, star A will appear 100 times brighter than star B.
Answer:
We can solve this by analyzing the choices and the relations between variables.
Notice that Kinetic Energy depends on the speed and the mass. Actually the Kinetic Energy is directly proportional to those variables, which means the more mass or the more speed, the more Kinetic Energy would be.
Having said that, Part I and Part II must have speed and mass as independent variable, because Kinetic Energy depends on them.
Then, in the third question, the answer is Kinetic Energy because that's the dependent variable in both cases Part I and Part II.
Just to remember, the Kinetic Energy is defined as
Where you can notice the relation between mass, speed and kinetic energy.
Therefore, the right answer are Mass (Part I), Speed (Part II) and Kinetic Energy (Part III).
Explanation:
Answer:
Electricity is defined as the flow of electric currents or charges along or through a conductor.