Which rows correctly show cathode and anode products from the electrolysis of the named electrolyte?
electrolyte
cathode product
anode product
1
sulfur
copper(II) sulfate solution
copper(II) sulfate solution
2
copper
hydrogen
hydrogen
oxygen
3
dilute sodium bromide solution
oxygen
bromine
4
molten lead(II) bromide
lead
A
1 and 2 only
B
3 and 4 only
C 2 and 3 only
D 1 and 4 only

(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