Answer:
About half or more
Explanation:
Over 50% of the United States population depends on groundwater for drinking water. Groundwater is also one of our most important sources of water for irrigation.
About 115 million people—more than one-third of the Nation's population—rely on groundwater for drinking water.
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Given
m1 = 15kg
vi1 = +20 m/s
vf1 = +5 m/s
m2 = 10 kg
vi2= -15 m/s
vf2 = ?
Procedure
Conservation of momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant.

The speed of the 10kg Ball is 7.5m/s
Answer:
no where we all stay home
More often than not, the pros outweigh the cons when it comes to nuclear energy. It has very low operating costs, produces sufficient energy to meet demand, and has a variety of other economic benefits that can't be ignored
Answer:
4400 N
Explanation: (c)
P= 
F= PA
P= pressure
A= area
P=800x
and A= 5.5 x 

Force F= 800x
x0.0055= 4400 N
force exerted by the gas on the piston is 4400 N