What is the frequency, in Hertz, of a simple pendulum, on Earth, if it has a length of 1.39 m? WITH EXPLANATION.
Will mark brainliest if correct! :)

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.