When a voltaic cell changes to begin operating as an electrolytic cell, A. the positive electrode changes from being the cathode to being the anode.
B. the negative electrode becomes both the anode and the cathode.
C. the positive electrode changes from being the site of oxidation to being the site of reduction.
D. the negative electrode becomes the site of both oxidation and reduction.
Hurry please it is timed

I do believe it is C, best of luck.

1 a

2 d

3 a

4 c

explanation:

(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