Groundwater supplies can be easily contaminated by surface mining of coal All BUT ONE may be how surface mining might adversely affect groundwater conditions,

A)
direct dumping of tailings and effluents into rivers

B)water used in the chemical extraction of metals, commonly contains
process chemicals

C)water which has trickled through solid mine wastes may contain dissolved
minerals, process chemicals, and/or metals

D)technologies used to control water flow prevents contamination

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

The excretory system, need answers for all: )

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?