When there is just a horizontal velocity for a projectile and another case in which there is a horizontal velocity and vertical velocity for a projectile that launches at an angle, are the horizontal velocities going to remain the same?

The horizontal velocities of the projectile for both cases are going to remain the same.

Explanation:

Taking the horizontal direction as x-axis and the vertical component as y-axis.

Let V be the object's velocity and θ be the angle formed with the horizontal.

Therefore,  

The horizontal component of velocity is,

Due to the force of gravity the vertical component of velocity changes. But there is no influence of force in the horizontal component other than the air resistance.

Hence, the horizontal component of the velocities of the projectile remains the same.

the answer is a 3.8cm

explanation:

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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