Answer:
B) momentum and mechanical energy
Explanation:
In classical physics, a closed system is a system that does not exchange any matter with the surrounding, and on which there are no external forces acting on it.
Due to this definition, we have the following consequences:
- In a collision in a closed system, momentum is always conserved. This is because there is exchange of matter with the surroundings (so, no mass can be lost), and also because there are no external forces acting on the objects inside the system. In fact, the variation of the total momentum of the system is related to the net force acting on the system:
but since the net force F is zero, then the variation of momentum, , is also zero, therefore the momentum is constant.
- Also, mechanical energy is conserved. Mechanical energy is the sum of potential energy and kinetic energy of the system: again, since there are no external forces acting on the system, energy cannot be dissipated, so the total energy of the system cannot change.
Depends on how strong you are. People can hit it anywhere between a few inches and 500 yards.
Answer: 0.57
Explanation:
Let's begin by explaining that two angles are complementary when they sum is :
Having this clear, let's find from the following trigonometric function:
Now that we have the value of , let's find :
This is the complement of angle
Then, the cosine of the complement is:
This is the answer
Neither do.beacuse diffusion occurs due the random movement a substance's particals move from a higher concentration to a lower concentration down the concentration gradient.On the other hand osmosis is the movement of water molecules from a high water potential to a low water potential through a partially permeable membrane.thus no energy is required for them to do so.Active transport is a process that requires energy.