# Lab 3 assignment

Fragment of a discussion from User talk:MajaKrzic

From your 2 water retention curves for medium & fine sand samples you will read off tensions that correspond to AEV and AIV. Those tensions are equal to h (height of rise) in the capillay raise equation. Once you have h (ie T) values, you need to solve the capillary rise equation for r (radius) so that you can calculate radius of pores that corresponds to AEV and AIV.