What problems did the Cascades cause in the railroad's first three years? Check all that apply. O Rockslides often delayed trips through the mountains. It was difficult to build a pass through the rugged slopes. Hot temperatures in the summer warped the train tracks. O Avalanches in the winter could trap a train for days at a time. Tornadoes sometimes ripped up tracks and derailed the trains, ILL GIVE BRAINLIEST IF RIGHT HURRYYY

The pka of three different c―h bonds is given below. explain the observed trend in pka. select the single best answer.

Which of these best describes why georgia was important to united states during world war i? a)georgia made money by selling cotton and wood to europe.b)more soldiers came from georgia than from any other state.c)many white planters volunteered to serve in the war effort.d)the state had many federal installations and training camps

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?