Question

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

a leading newspaper published the results

the results of the experiment could not be repeated

the scientific process used in the experiment was elaborate

all the scientists who did this experiment got the same result

Answer 1

Here's a big rule:

In ANY KIND of science experiment, the results are only valid if they can be repeated.

That means that if 5 different people do the same kind of science experiment,
and they all get the same results,
then it means that the science experiment, and the results, are valid.

Answer 2

so is the last one...

Answer 3

Yes.