Proton
charge +
electron
charge -
neutron
charge neutral
<span>A.
The model of the atom evolved as scientists have made new discoveries.</span>
Answer:

Explanation:
Use the Kinematic Equation:

Plug in what is given and solve


Not exactly the best way to describe it but, it is used to calculate resistance of a lever as in the use of a pry bar or pulley. Technology used to increase output with little input.