What is it that you want answered?
Answer:
weight = 25*10 =250 N
Explanation:
g must be given in units of m/s^2
The weight of any type of body will be the product of his mass by the gravity
where:
m =mass [kg]
F = force [N] or [kg*m/s^2]
g = acceleration [m/s^2]
It is called <em>refraction</em> and is caused the the clear surface bending the light to make it appear different colors or look like it is bent.