Using Newton's Second Law, we can find the air resistance. We know the net force is equal to mass times acceleration.
A salt is dissolved in water which has a freezing point of 0 degrees celsius. the freezing point of the solution would be dependent on the concentration of the salt in the solution. It is explained by the colligative properties. These <span>are </span>properties<span> that depend upon the concentration of solute molecules or ions, but not upon the identity of the solute. Hope this answers the question.</span>
A compound is the substances that are formed by combining two are more chemical elements. A mixture is a substance created from two or more matter that can be separate with the help of physical methods. ... Mainly pure water is part of the compound. Mixtures fall under impure water.
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I think the answer is Black. Hope this helps
Answer:
Explanation:
When an object strikes the ground, the potential energy of the rock gets converted to the kinetic energy.
A rock is dropped from a distance 
above the surface of the earth and is observed to have kinetic energy 
when it hits the ground.
For another rock, It is dropped from twice the height 
above the earth’s surface and has kinetic energy 
when it hits.
For the first rock, 
..............(1)
For the second rock, 
..............(2)
Dividing equation (2) by (1) we get :
Hence, this is the required solution.
