Atrain is loaded with coal, doubling its weight and causing it to go at half the speed. what happens to the overall momentum? (consider the formulas p = mv and )

It remains the same

Explanation:

The Conservation of Momentum principle establishes that the initial momentum must be equal to the final momentum :

(1)

In the case of the train, its initial momentum is:

(2)

Where is the mass of the train and is the initial velocity of the train

And, its final momentum is:

(3)

Where:

since we are told the mass of the train is doubled

since we are told the velocity of the train goes to half

Hence:

(4)

(5)

(6)

This means the momentum of the train remains the same.

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers