1. Two point charges are separated by 6 cm. The attractive force between them is 14 N. Find the force between them when they are separated by 12 cm.

2. The SI unit of mass is the kilogram. What is the SI unit of charge?
3. The proportionality constant k in Coulomb’s law is huge in ordinary units, whereas the proportionality constant G in Newton’s law of gravitation is tiny. What does this mean in terms of the relative strengths of these two forces?

1. Use Coulomb's law. Express distances in meters.

2. coulomb
3. electrostatic forces are much stronger than gravitationsl ones. In a hydrogem atom, the ratio is about 10^39

1. To find the force between the two charges when they are separated by 12 cm, we can use Coulomb's Law. Coulomb's Law states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

First, we need to find the ratio of the distances. The initial separation is 6 cm, and the final separation is 12 cm. Thus, the ratio of the distances is 12 cm / 6 cm = 2.

According to Coulomb's Law, we know that if the distance doubles, the force becomes one-fourth of the original force. In this case, the initial force is 14 N, so the force between the two charges when they are separated by 12 cm will be one-fourth of 14 N.

Therefore, the force between them when separated by 12 cm is 14 N / 4 = 3.5 N.

2. The SI unit of charge is the coulomb (C). It is named after physicist Charles-Augustin de Coulomb, who made significant contributions to the field of electrostatics. The coulomb represents the amount of electric charge transported by a current of one ampere in one second.

3. The proportionality constant k in Coulomb's law is much larger compared to the proportionality constant G in Newton's law of gravitation. This means that the electrostatic force between two charged objects is much stronger than the gravitational force between two massive objects.

In other words, the electric force acts much stronger than the gravitational force between two objects with the same properties (such as mass or charge) and at the same distance. This is due to the fundamental nature of these forces, where electrostatic forces are determined by the magnitude of the electric charge and the distance, while gravitational forces only depend on the masses of the objects and the distance between them.

The large value of k in Coulomb's law indicates that electric forces can act over relatively short distances and have a significant impact on the behavior of charged particles, while the small value of G in Newton's law of gravitation indicates that gravitational forces are relatively weaker and usually observed over larger distances, such as at astronomical scales.