A metalworker must invest 1,347 J to melt 10 grams of gold and 2,260 J to melt 10 grams of silver. The specific heat of gold is .129 J/g ˚C. The specific heat of silver is .240 J/g ˚C. Predict which metal has a higher melting point, and explain your reasoning.

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.

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

What is special about a dc circuit ?