Answer:
238 N
Explanation:
Archimedes principle states that every body submerged in a fluid is buoyed up by a force equal to the weight of the fluid displaced by the body:
[tex]W_I=W-W_f[/tex]
Here, [tex]W_I[/tex] is the immersed weight of the copper, and [tex]W_f[/tex] is the weight of the displaced water. Due to this, the copper has a weight when immersed in water of:
[tex]W_I=268N-30N\\W_I=238N[/tex]
