The atomic mass of an element is a. twice the number of protons in one atom of the element. b. the sum of the protons and neutrons in one atom of the element. c. a weighted average of the masses of an element’s isotopes. d. a ratio based on the mass of a carbon-12 atom.

Select the three ways that the parallel-plate capacitor differs from a car battery.

Which composition of water moves to begin a deepwater current?

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