PLEASE HELP!!

Student 1 drops a ball from a tower. Student 2 throws a ball down at 35 m/s from the same height and from the same tower. The student 2's ball takes one-quarter of the time of the dropped ball. What is the height of the tower? Use a=10.0m/s2 [down]

Aforce of 9.00 newtons acts at an angle of 19.0 to the horizontal. what is its component in the horizontal direction?

Newtons view of arrangement of the universe. don't copy from anywhere.

A6.0-μf air-filled capacitor is connected across a 100-v voltage source. after the source fully charges the capacitor, the capacitor is immersed in transformer oil (of dielectric constant 4.5). how much additional charge flows from the voltage source, which remained connected during the process?