What level of government is in charge of developing “naturalization laws”?

Congress

Explanation:

Congress has the power to establish a uniform Rule of Naturalization throughout the US.

trig 15.3 cos

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.