Materials that absorb water app for iPhone and iPad

This is an APP for calculating the relationship between materials and water. Especially suitable for chemistry teachers and students!

At the intersection of the three phases of the material, water and air, a tangent line is made along the surface of the water drop, and the Angle θ between the tangent line and the contact surface of the material and water is called the edge Angle.
When θ≤90°, the material can be moistened by water to show hydrophilicity, this material is called hydrophilic material;
When... At 90°, the material cannot be moistened by water to show hydrophobicity, which is called a hydrophobic material.