Aprojectile travels in the horizontal direction at a velocity of 200 meters/second from a cliff that is 200 meters high. after how many seconds will the projectile reach the ground level? a. 4.2 seconds b. 6.2 seconds c. 6.4 seconds d. 9.2 seconds

Acar accelerates from 5.0 m/s to to 11 m/s at a rate of 3.0 m/s^2. how far does it travel while accelerating? 20m 117m 43m 16m

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

This is the substance(s) formed in a chemical reaction.