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.

low freq = 100 mhz

low wavelength =101.7m

length = 3x10^8/freq

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is