Purchase Solution

Calculation of Force of Interaction

Not what you're looking for?

Ask Custom Question

Two hydrophobic glass slides measuring 1 cm x 1 cm x 1 mm are floating on water with their sides parallel to each other. Estimate the force of interaction between the solids as a function of their separation distance. Assume that the intrinsic contact angle of the water is 110 degrees.

What I mean by the intrinsic contact angle is that if you put a drop of water on the slides, the contact angle of the water against the slide would be 110 degrees.

Purchase this Solution

Solution Summary

Let us consider that d be the distance between the plates, alpha be the area of the ?lm between the plates, p be the circumference of the ?lm and theta be the contact angle. Then the plates will be pressed together with a force: F = (2S*alpha*cos(theta))/ d + pS*sin(theta). Solution shows full calculations and answer.

Purchase this Solution

Free BrainMass Quizzes
Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Basic Physics

This quiz will test your knowledge about basic Physics.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.