How might a free trade agreement such as NAFTA contribute to national security?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart