Explanation:
P= rho×g × h (g=10 m/s²) ,
(rho=1000 kg/m³)
P= 1000×10×5= 50,000 N/m² (C)
The relationship between the resistance R of a wire and its resistivity

is given by

where L is the length of the wire and A is its cross sectional area.
In the problem, we have

,

and

. So we can solve the find the area A:

For a cylindrical wire, the cross sectional area is given by

where r is the radius. We know the value of the area A, so now we can find the radius of the wire:
I believe it would best represent Newton’s first law; an object tends to stay at rest and an object tends to stay in motion unless acted upon by an unbalanced force. When the dog stops walking, the doll will continue to go forward because there is no unbalanced force acting in it.
Hello ? What compounds are you referring to ?