Need Help Understanding a concept on Buoyancy

[jason_r]

Need Help Understanding a concept on Buoyancy!

Homework Statement

I have a beaker on a scale. I suspend a block on a string and place it in the beaker. Will the scale reading be higher or lower than before?

I need someone to explain the concept please

Homework Equations

The Attempt at a Solution

 

[Kurdt]

Have a look at the following page and see if that helps any.

http://hyperphysics.phy-astr.gsu.edu/Hbase/pbuoy.html#buoy