Question

why does the metal block feel different wave when completely immersed in different liquid

Answer 1

we know about this is upward force acted by the water on metal block the force is equal to the water displace by block this force known as boyoyance force

Answer 2

Dear student ,
I think the question should have been why does the metal block feel different weight when immersed in different liquid.
 Metal block immersed in a liquid experiences a upward force called buoyant force  or thrust, due to which objects appear to loose weight.
Upthrust depends on density of liquid.
If Density of liquid in which metal box is immersed is more then object experiences more buoyant force.
Hence metal block feel different weight when immersed in different liquids.