# Chemical Forums

• September 21, 2017, 11:06:54 AM
• Welcome, Guest

•

•

### Chemistry Books

Pages: [1]   Go Down

### AuthorTopic: Intermolecular forces question  (Read 329 times) !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="https://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() {var po = document.createElement("script"); po.type = "text/javascript"; po.async = true;po.src = "https://apis.google.com/js/plusone.js";var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(po, s);})();

0 Members and 1 Guest are viewing this topic.

#### DaftJamrock

• Very New Member
• Mole Snacks: +0/-0
• Offline
• Posts: 1
##### Intermolecular forces question
« on: July 14, 2017, 06:03:13 AM »

'Two solid spheres, 1 and 2, of density 1.0g/cm3 and 10.0 g/cm3, respectively, are in an infinite liquid medium 3 of density 2.0g/cm3 and dielectric constant 2.0. Sphere 1 carries a charge of +e and sphere 2 carries a charge of -e. If the spheres have the same radius R, calculate the value of R for there to be no long-range force between them at any separation D.'

Can somebody help me with this question please?

I think it is based upon Coulomb's law and I know the force equation is q1*q2/4πε0r^2ε. However what I don't understand is how the density comes into this equation.
Logged

Pages: [1]   Go Up

Mitch Andre Garcia's Chemical Forums 2003-Present.

Page created in 0.077 seconds with 24 queries.