A 4000kg truck took 120 seconds to stop. It had an original velocity of 20m/s. How much force was required to stop it

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.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

You can decrease the resistance of a length of wire by