Two solid cubes have the same Mass but their edges are in the ratio of 4:1. What isthe ratio of their densities?​

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.

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?