When ammonia, nh3, dissolves in water, hydrogen ions are transferred from the water to ammonia to form ammonium ions and hydroxide ions. this reaction can be seen below:

h2o (l) + nh3 (aq) yields oh- (aq) + nh4+ (aq)

which of the following to explain why ammonia is a base?
a. arrhenius definition
b. bronsted- lowry definition
c. lewis definition
d. ionization definition

Bronsted- Lowry definition helps to explain why ammonia is a base.

Explanation:

The Brönsted - Lowry theory states that acids are substances capable of yielding protons (hydrogen H⁺ ions) and substance bases capable of accepting them.

Then, the acid-base reaction is one in which a transfer of H⁺ protons occurs from an acid to a base.

A base acid conjugate pair is then produced, where the base conjugate acid is the one formed when the base receives an H⁺; and the conjugate base of the acid, is the base formed when the acid yields an H⁺.

You know this reaction:

H₂O (l) + NH₃ (aq) → OH⁻ (aq) + NH₄⁺ (aq)

In this case you can see that the water acts as an acid, because it gives a proton to the ammonia. Then the ammonia will act as the basis for accepting the proton. The conjugate base of water is the hydroxide ion (OH⁻) and the conjugated acid of ammonia is the ammonium ion (NH₄⁺).

Then, Bronsted- Lowry definition helps to explain why ammonia is a base.

(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