Air flows according to differences in thermal energy. If a warm air mass is located in the northeast United States and a cold air mass is located in the southwest United States, from which direction will the winds blow?
northwest
northeast
southwest
southeast

The activation energy for this reaction is 75 kj·mol–1. the enzyme catalase (found in blood) lowers the activation energy to 8.0 kj·mol–1. at what temperature would the non-catalyzed reaction need to be run to have a rate equal to that of the enzyme-catalyzed reaction at 25°c?