When the difference in electron-attracting ability between atoms in a chemical bond is , the atoms in the bond will have no significant partial charges. we call this type of bond a nonpolar covalent bond.

Very small.

Explanation:

The electron-attracting ability is the electronegativity of an atom, and it's the ability that an atom has to "push" by it the electron in a bond. When there is a very large difference in this ability, the atom with low electronegativity will lose electrons, and the other will gain electrons and an ionic bond will be formed, It happens between metals and nonmetals.

But, when that difference is not so large, the atoms must share the electrons, and a covalent bond is formed. When the difference in electronegativity can't be disregarded, the atom with high one will have a partial negative charge, and the other a partial positive charge and the covalent bond will be polar.

When the difference in electronegativity is very small (close to 0), partial charges will not be formed, and the covalent bond will be nonpolar.

the right answer is c i just did the question.

(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