Which of the following is the most accurate statement of the law of conservation of momentum?
the total momentum of a system of objects before and after an interaction is the same, if there are no outside forces acting.
when two objects collide, the momentum of each object stays the same.
the impulse acting on an object is equal to the momentum change it causes on another object.
momentum is a vector quantity.

Read this passage from the online article “top 10 reasons why everyone is doing yoga” by kathryn livingston. what type of propaganda is the author using? why are so many people doing yoga these days? there must be more to it than endorphins; there has to be a deeper reason why 20 million plus americans have fallen in love with this venerable practice. here is my top ten list – and if you’re a yogi, i’m sure you can think of more.