Mechanical advantage is a measure of the force amplification achieved by using a tool.
I think you forgot to give the options along with the question. I am answering the question based on my knowledge and research. "<span>The charge can be located anywhere, since flux does not depend on the position of the charge as long as it is inside the sphere" gives the answer to the question. I hope that this answer has come to your help.</span>
"Density" is the ratio of two numbers ... the mass AND the volume of a piece of some material.
If you only have one number, then the density of it is like one scis, or one tweez, or the sound of one hand clapping, or one pant.
Answer: It would be 0
Explanation: Because like you said it would cancel each other out because if you are going 6N to the right and then you go 6N to the left you are actually not moving at all
Explanation :
The phenomena in which the ray of light bend towards or away from the normal is called the refraction of light. Light always travels in straight line. If the speed of light in both medium differs then refraction occurs.
According to Snell's law :
Where 
and 
is the refractive indices of two medium 1 and medium 2.
and 
is the speed of light in medium 1 and medium 2.
Hence, the given figure shows the refraction of light.
