A procedure that is often used to separate molecules by using their molecular charges is called .

Electrophoresis

Explanation:

the procedure is usually used in life science laboratories to separate nucleic acids (DNA and RNA), which are negatively charged. An electric current at a certain voltage is passed through the electrophoresis tank containing the buffer. molecules to be separated are filled in the wells of a solidified gel ( usually agarose gel).As the current passes, the charged molecules move to opposite electrodes. The movement of molecules in in the gel also depends on the size of the molecules.

10 years is the answer

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied