[so many questions (OP)]

Boyd Foster  asked the Naked Scientists:
   Hi Dr. Chris,

My questions is if you had 2 perfectly round balls (spheres) of the same size with perfectly smooth surface areas touching each other and then the same again but the balls were of larger (or smaller) size and you eliminate gravity from the equation, would the contact point be different? could it be calculated?

Thank you,
Boyd from Australia

What do you think?