An open system is a system in which both matter and energy are exchanged with the surroundings.
a. true
b. false

Patricia is trying to compare the average rainfall of new york to that of arizona. a comparison between these two states for the months of july through september would best be measured in

The strong nuclear force acts over a small distance than the electrostatic force. true or false

Chi walked 100 meters in 5 minutes. she took another 15 minutes to walk another 400 meters to reach her house. what is her average speed?