To solve this problem we will also apply the concept related to the conservation of the mass, which announces that: "In an isolated system, during any ordinary chemical reaction, the total mass in the system remains constant, that is, the mass consumed by the reagents is equal to the mass of the products obtained. "
If the mass is in a closed system, it cannot change. This assessment should not be confused with the transformation of the matter within it, for which it is possible that over time the matter will change from one form to another. For example during a chemical reaction, there is a rupture of links to reorganize into another, but said mass in the closed system is maintained.
The correct answer is:
C. "The mass of a closed system cannot change over time; mass cannot be created or destroyed."
Answer:
The terrestrial planets are closer to the sun.
Explanation:
Answer:
ase of convenience, since the beneficiary by having a burrow and the shrimp benefits from knowing that there are predators nearby.
Explanation:
This exercise asks to study the dependence between two animals, the shrimp and the puffer fish.
Two types of dependency are defined:
* Complete. What is when one animal lives off the other
* Convenience if one animal does not live on the other
In this case, both the shrimp and the predator do not live on each other, since they feed independently.
So it is a case of convenience, since the beneficiary by having a burrow and the shrimp benefits from knowing that there are predators nearby.
The correct answer is: the balloon benefits by getting a burrow to live in and the shrimp knows when predators are nearby.
Explanation:
It is given that,
Mass of the ball, m = 1 lb
Length of the string, l = r = 2 ft
Speed of motion, v = 10 ft/s
(a) The net tension in the string when the ball is at the top of the circle is given by :



F = 18 N
(b) The net tension in the string when the ball is at the bottom of the circle is given by :



F = 82 N
(c) Let h is the height where the ball at certain time from the top. So,


Since, 

Hence, this is the required solution.