A 1,100kg car comes uniformly to a stop. If the vehicle is accelerating at -1.2m/s2, which force is closest to the net force acting on the vehicle?

The four giant gas points that are made primarily of lightweight elements are

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.