What is the strength of an electric field that will balance the weight of a 1.0 g plastic sphere that has been charged to −3.0nc?

Explanation:

In order to balance the weight of the sphere, the electric force must be equal in magnitude to the weight of the sphere:

where

is the charge of the sphere (we can ignore the sign, since we are only interested in the magnitude of the force

E is the strength of the electric field

m = 1.0 g = 0.001 kg is the mass of the sphere

g = 9.81 m/s^2 is the gravitational acceleration

Solving the equation for E, we find the strength of the electric field:

  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