Answer:
(3) protons
Explanation:
Magnetic fields are produced by charged particles in motion. Let's analyze each option:
(1) x rays --> they consist of photons, which are neutral particles, so they don't produce magnetic fields
(2) gamma rays --> they consist of photons, which are neutral particles, so they don't produce magnetic fields
(3) protons --> protons are charged particles, so they can produce magnetic fields if they are in motion
(4) neutrons --> neutrons are neutral particles, so they don't produce magnetic fields
Answer:
The study described above is an observational study.
Explanation:
The main difference between an observational study and an exepriment, is that in an experiment there is a manipulation of one or more variables, this usually happens in a controled environment. In an observational study, the conditions of the research subjects are not meant to be altered but only observed, surveys and interviews are common research techinques used for this purpose.
The example above is describing an observational study since there is no manipulation of variables, only a survey that aimes to understand the factors that influence the dependent variable, that in this case is anxiety.
C) Farmers and the working class.
He would most likely to support the causes of that.
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