An object is projected at 25m/s from the top of a building of height 50m. at the same instant, another object is projected from the bottom of the building in the same vertical plane at 50m/s with an elevation of 30 degrees. (a) after how many seconds will the object collide .
(b) determine the point where they collide

Several processes form metal ore. match each process to its description. volcanic activity weathering hydrothermal energy rocks break down as they interact with air and water. arrowright density differences and other factors cause metals to concentrate in igneous rocks. arrowright seawater heats up from contact with hot rock, and metals dissolve in it. the water rises and contacts cooler water, causing metal ores to settle on the ocean floor. arrowright

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

The air that we breath is made mostly of which gaseous molecule