These equations represent the results of dissolving different substances in water. for each dissolution,
the results of a conductivity test are given. the conductivity test involves placing wires connected to a
battery and a light bulb into the solution. if the solution is able to conduct electricity, the bulb will light.
identify each substance as a strong electrolyte, weak electrolyte, or nonelectrolyte.
(nh4)2so4(s) -> 2nh4+ (aq) + so4 (aq) light bulb glows brightly:
cuso4(s) → cu2+(aq) + s022-lag light bulb glows brightly:
hfc) + → h30*(aq) +f- (aq) light bulb glows faintly:
c3h60(1) - c3h6o(ag) light bulb does not glow:

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

: )

i think it's letter a.

(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