That has to be FALSE.
Without knowing anything about chemistry, I just notice that
neither Hydrochloric acid (HCl) nor water (H₂O) has any Carbon
in it. So in a reaction between them, there's nowhere to get
any Carbon from.
I believe the process you have described is known as an 'experiment'.
Answer:
Mechanical advantage is the measure of the force amplification achieved by using a tool , mechanical device or machine . The machine preserve the input power and supply trade off force. against movement to obtain a desired amplification in the output force .
Answer :Force is exerted by the Earth on the rock is 280 N .
Given :
Mass of rock falling falling , m = 28 kg .
Acceleration due to gravity , 
.
We need to find the force exerted by the earth on the rock .
Let force exerted be F .
Now , we know by Newton's Law Of Motion .
F = ma .......( 1 )
Here , m is mass and a is acceleration in this case it is .
Putting all these value in equation( 1 ) we get ,
Therefore, this is the required solution .
<span>If coal is stacked near mines, the most likley thing that will happen is that rain watter will carry contaminants in coal into durface water. When rain falls on coal, it erodes it just like any other rock. So amounts of coal can be washed out of its holding area and into surface *and* groundwater. Correct answer:D</span>
