Why does a circuit need to connect the negative to the positive sides of a battery?

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.

Which of the following would not diffuse through the plasma membrane by means of simple diffusion? 1 oxygen 2 glucose 3 a steroid hormone 4 a lipid soluble vitamin