All of following are possiblr sources of error in a scientific investigation except for

Afour step process is shown in the diagrams provided. this process begins with two metal spheres with no charge and ends with opposite charges on the spheres which of the following best describes the process demonstrated in the four steps in the diagram?

Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.