Identical point charges (45 C) are placed at the corners of a square with
sides of 2.0-m length. How much
external energy is required to bring a
fifth identical charge from infinity to
the geometric center of the square?

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

temp rises, and expansion

i will answer your question if you answer mine

  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