Why is it that intermolecular forces increases with vapor pressure also increases

What point is the author trying to make by comparing the travel times of the first transcontinental railroad and the first transcontinental flight?

What statement best describes the central conflict in this passage from the diary of anne frank? because the franks are jewish and the van daans are not, the franks and the van daans do not get along. because they are jewish, the franks, the van daans, and mr. dussel are in hiding to avoid being discovered by the nazi party. anne does not discuss anything with her mother because she believes that her mother does not understand her. mr. and mrs. van daan argue because mrs. van daan does not think that mr. van daan has the right to sell her fur coat.

Lines 9-12 compare the "ashes of youth" to a deathbed twilight fire youth