Which one I- uh

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

What is the independent variable in this investigation? mass volume sample number substance density

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.