Pleaswe help me ewwfea

What’s #16 asking me and how do i solve it?

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions

What physical characteristic does the moment of inertia of a rotating object most directly and accurately measure? radius mass momentum rotational inertia