In order for a spacecraft mission using a propulsion system to be successful, the sum of three forces, 1) Earth's gravity, 2) the Sun's gravity, and 3) the Sun's light pressure, must be a net force in the desired direction of travel.

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

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?