1. Bowling ball sitting in the rack:
kinetic energy = 0, because the ball is not in motion - we have only potential energy in this case
2. Bowling ball knocking pins down:
at the moment of knocking kinetic energy is increased, while the potential energy is decreased
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.
Answer:
Theory
Explanation:
Conservation of energy is explained as a scientific law and not a theory because it does not explain why energy is conserved.
A law is a the statement of a scientific fact. It is a product of repeated experiment and observation through time. Most laws do not explain the reason for the logic behind their premise.
A theory on the other hand provides an explanation for an observed phenomenon. Most theories are no immutable. They are often changed when new finds are reported or made.
Laws are immutable and they stand still.
Answer:
Explanation:
The acceleration due to gravity on the surface of the Earth is given by:
where
G is the gravitational constant
M is the mass of the Earth
R is the radius of the Earth
Here we want to find the new Earth radius R' for which the gravitational acceleration at the surface, g', would be 3 times the current value of g:
So we would have
Solving the equation for R', we find
