Another expermit shown the velocities for a trail to be 1.0 m/s 2.5 m/s 4.5 m/s and 7 m/s when measured in the same way. what trend occurred in the acceleration another expermit shown the velocities for a trail to be 1.0 m/s 2.5 m/s 4.5 m/s and 7 m/s when measured in the same way. what trend occurred in the acceleration

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

The correct answer is:   [a]:   the "stratosphere" .