Sasha pulls a block across the floor at a constant speed. Why doesn't the motion of the block change even though Sasha is pulling on it?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Nonmetal halogen family atmoic mass 35

What are the 4 phases of matter in order of increasing engery content?