Why don’t metals break when pounded into sheets or drawn into wires? the electrons in metals are shared so that the bond between them is too strong to be broken by pounding. the electrons in metals allow the cations to slide past and thereby reduce the repulsive force between them. the electrons in metals are either given up or taken up while bonding, creating a bond too strong to be broken by pounding. they form molecules in which each atom is bonded to many other atoms, forming a sturdy structure which doesn’t break on pounding. they form molecules which have a very high boiling and melting point, which makes them resistant to breaking. nextreset

Yeah should be B.

The electrons in metals allow the cations to slide past and thereby reduce the repulsive force between them.

(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