Two small identical conducting spheres are placed with their centers 0.63 m apart. one is given a charge of 12 x 10^−9 c, the other a charge of −23 x 10^−9 c. (a) find the electrostatic force exerted on one sphere by the other. magnitude n direction (b) the spheres are connected by a conducting wire. find the electrostatic force between the two after equilibrium is reached, where both spheres have the same charge. magnitude n direction

a) , attractive.

b) , repulsive.

Explanation:

We use Coulomb's Law to calculate the electrostatic force between 2 charges and separated a distance r:

Where is Coulomb's constant.

a) At the beginning we then have:

Since their signs are different it will be attractive.

b) The total charge must be conserved, which is:

So now each charge will have a charge half this value

And the force will be:

Since their signs are the same it will be repulsive.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

the total distance traveled by the car is

30km + 49km = 79 km .