A pendulum consists of a 50kg mass suspended from a rope that is 30 m long. The bob is elevated 6m from its equilibrium position and then allowed to swing freely. How fast will the pendulum be moving when it is halfway down to its equilibrium position?

Asimply means that over time there was some sort of change.

Astudent is working in the lab to determine how time affect impulse the student keeps the force the same in each row but changes impact the time some data is shown witch trial has the greatest a student is working in the lab to determine how time affect impulse the student keeps the fours the same in each row but change is the impact time some data shown witch trial has the greatest impulse

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?