1. i drop a penny from the top of the tower at the front of fort collins high school and
it takes 1.85 seconds to hit the ground. calculate the velocity in m/s after 1.10
seconds of freefall and calculate the velocity at impact in mi/hr.

What is the momentum of a 2 kg object moving at 15 meters per second

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron