Your friend says that impulse equals momentum. your friend's statement is not correct, and the missing word is: change. does anyone know why the word is change ?

A moving object has some momentum. In order for its momentum to change, a force must act on it. The product of (force applied) x (length of time the force continues) is called the "impulse" delivered to the object. After the impulse, the object's momentum is different.

The impulse is equal to the CHANGE in the object's momentum.

answer; equivalent to a one(1) horsepower motor;

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas