Recent content by dark_vader93

Truth. So the force would double, wouldn't it?

At a certain distance from a point charge q there is small, dielectric ball. How would change the value of electrostatic force acting on the ball, if the value of a point charge would be doubled? According to F=k[(q1*q1)/r^2] there would be no force on the dielectric ball, because his resultant...

yes.

thank you very much. that's a great idea to measure their densities or temperatures. i think, that one with density is the easiest one. you put them in water and the ball which has longer half-life would move down faster.

There are 2 radioactive balls, which have the same radius and the same weight. They are covered with absorbing layer. They are made of diffrent materials, with other half-life. What is the easiest way to recognise which is which? I had searched for the answer for a longer time and could not...