a runner starts at a postion of 5.0 m and travels wt a rate of -3.2 m/s. determine the position of the runner at t=3 seconds in meters

Anybody wanna ? (picture included? )

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not