Newton's first law of motion states that an object at rest stays at rest, and an object in motion stays in motion, unless acted on by an unbalanced force.

Suppose that you stir a green powder into a clear liquid. The liquid turns green. You leave the room and come back later to observe that the top of the liquid is clear again. A green substance has settled on the bottom of the container.

When a hypothesis is tested and shown to be incorrect is the experiment a failure?

Which family in the periodic table has elements that are all radioactive

If the half life of a first order reaction is 24 days. Calculate the rate constant for the reaction

How can people protect themselves from hazardous weather?

An aqueous solution is made from a molecular compound rather than from an ionic compound. If some ions are present in solution, which best describes the solute? A. a weak electrolyte B. a nonelectrolyte C. a strong electrolyte D.

Which of the following measures the radiation given off by atoms per second?

What is the name of the outermost layer that forms a boundary around the outside of each cell

What does an ionic compound form?

How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?