Which of the following statements is true? factories must receive permits to dump waste in rivers. most industrial waste is solid. oil refining produces very little waste. all of the above.

Acontrol during an experiment. might change remains constant does not exist does change

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.