What are three physical properties of sodium

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.