What force prevents a machine from having 100% efficiency? A. Magnetic B. Electric O C. Friction O D. Gravity

Which of the following statement is false ? a.batteries should never be stored on metal trays or outside in the elements)b, battery acid cannot be neutralized)c.do not stack batteries on top of each other)d.never put a damaged battery in a dumpster. i

Substances that assume the shape of their container, but do not have a definite size are called

When you notice something that is happening, what are you making? a. an observation b. a law c. a theory d. an experiment