The shortest and direction of an object change in position

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

2. how is heavy water different from normal water

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change