If energy is added to a boiling liquid, what happens to the temperature of the liquid?

It increases.

It does not change.

It decreases.

temperature will not change.

Explanation:

when energy is added at a boiling point of a liquid that energy will not  further increase the temperature but do help in breaking the bonds between molecules present in the liquid and results in vaporization or conversion of liquid into gas phase.

Breaking of bond will occur at same temperature and further addition of energy will not cause any change in temperature.

you need to have a picture of the atom that way we can answer it

(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