Complete this sentence. If mass remains the same while the volume of a substance , the density of the substance will. (2 points)

What kind os source would a historian use to get a firsthand account of a past event

Many scandinavians immigrated to the united states as a result of the homestead act of 1862, which offered land to independent farmers. this is an example of a push factor, because turmoil in scandinavia encouraged people to leave. push factor, because a new opportunity encouraged people to come to the us. pull factor, because turmoil in scandinavia encouraged people to leave. pull factor, because a new opportunity encouraged people to come to the us.

Why are primary sources important when studying historical events