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I don't know I guess its the plate tectonics
As a system is cooled to its freezing point, the kinetic energy of the particles in the system will lower so the movement are much slower. Cooling means taking out heat from the system. This process is a physical change because it is only the phase of the system is changed and it is still the substance after the process.
Answer:
The charge of each charge is
Explanation:
When yo have two charged particles they interact exerting an electrostatic force in the other particles, the magnitude of the electrostatic force between two particles is:
(1)
with q1 and q2 the charges, r the distance between them and k the Coulomb's constant ()
Because the charges we're dealing are identical positive q1=q2, then (1) is:
Using the values the problem give us:
solving for q: