Question

A scientist did an experiment to show the properties of sound waves. The scientist's results were declared valid because

a. a leading newspaper published the results
b. the results of the experiment could not be repeated
c. all the scientists who did this experiment got the same result
d. the scientific process used in the experiment was elaborate

Answer 1

There is no such thing as a scientific 'law', persay; there are only scientific theories. In order for an observation/conclusion to become a scientific theory, the same experiment must be repeated by other parts of the scientific community. When, over a range of experiments, the conclusion is the same, it can become accepted and valid.
Hope that helps ~