Please help I have 3 questions 1. In three to five complete sentences, explain how a submarine can obtain neutral buoyancy. Remember to use proper grammar and mechanics.

2. Imagine you have a ball tied to the end of a string. You hold the other end of the string and swing it around. Suppose the string breaks, what direction will the ball travel?

3. Centripetal force demonstrates which of Newton's laws of motion?

As a pendulum moves closer to the equilibrium position, how do the velocity, acceleration, and force change? the velocity decreases, the acceleration decreases, and the net force decreases. the velocity increases, the acceleration decreases, and the net force decreases. the velocity increases, the acceleration increases, and the net force decreases. the velocity decreases, the acceleration increases, and the net force increases.