Why does a thin strip of paper rise when we blow air over it? a, the pressure above the strip is higher than the pressure below the strip.
b, the pressure above the strip is lower than the pressure below the strip.
c, atmospheric pressure changes with altitude.
d, none of these.

What purpose do the elements of art serve for artists and those who view artworks?

Spencer's blog claims that national parks are the best vacation destinations. which evidence is best for developing his claim? a personal account from a park visitor who describes positive adventures at grand canyon and yellowstone parks an interview with a travel agent who advertises cruises, eco-tours, and whitewater rafting trips a chart that compares the number of national parks in the eastern united states to that in the western states a study that proves adults who take yearly vacations have lower blood pressure than those who do not

Sound waves can travel only in the aira. trueb.false