Final answer:
The momentum of the hockey puck is 3.6 kg*m/s.
Step-by-step explanation:
Momentum is defined as the product of an object's mass and velocity.
To calculate the momentum of the hockey puck, you multiply its mass of 0.12 kg by its velocity of 30 m/s.
Momentum = mass * velocity
Momentum = 0.12 kg * 30 m/s
= 3.6 kg*m/s
Therefore, the puck is traveling with a momentum of 3.6 kg*m/s.