**Answer:**

D

**Explanation:**

the total speed and the total mass of the entire system remain the same weather one object is moving or stationary.

When two or more objects collide, the collision does not change the

total momentum of the two objects.

Whatever momentum is lost by one object in the collision is gained

by the other. The total momentum of the system is conserved.

The answer is full moon because that’s how it changes in life

**Answer:**

jk

**Explanation:**

Lets decompose the initial velocity into its components:

Vi = 2.25 m/s

Vix = Vi x cos(50)

Viy = Vi x sin(50) = 2.25 x sin(50) = 1.724

Then decompose the final velocity:

Vf = 4.65

Vfx = Vf x cos(120)

Vfy = Vf x sin(120) = 4.65 x sin(120) = 4.027

After that we can use:

Vfy = Viy + ay*t

ay = (Vfy - Viy)/t

ay = (4.027 - 1.724) / 8.33

ay = 0.276

The speed of a sound wave does not depend on the frequency of the wave, but only on the properties of the medium.

Since we are in the same concert all, the medium of propagation is still the same (the air), so it has not changed; therefore, the speed of the sound wave has not changed, and it is still 344 m/s.

So, the correct answer is "344 m/s".

Other than for the chemical symbol, the electron dot diagram for silicon would be the same as it was for carbon.

The reason for this is because electron dot diagrams are used to represent the electrons in the outermost, or valence, shell of an atom. In a group of the periodic table, all of the elements have the same number of valence shell electrons. This means that all elements belonging to the same group have the same electron dot diagram, except for the symbol of the element that is within the diagram.