Emily wanted to see what battery lasted the longest. She put each battery into a clock and recorded the time that the clock stopped. She used Duracell, Energizer, and EverRady. What is the independent and dependent variable
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Ответ:
independent variable -- different batteries
dependent variable -- the time that clock stop
Explanation:
In an experiment or a research study, there are two type of variables that can affect the result of the experiment or the conclusion. They are independent variable and the dependent variable.
An independent variable may be defined as that variable in an experiment which can be changed or can be controlled in the scientific experiment in order to test the effect on the dependent variable. It cannot be changed by other variables.
On the other hand, dependent variable are those are those which can be altered or change that can affect the experiment.
In the context, Emily uses the different types of the batteries as an independent variable and the time where the clock stopped in the dependent variable in her research.
Ответ:
From the periodic table, the element with 17 protons is chlorine. Chlorine is in the Group VII, as known as halogens. It is the 3rd period in the periodic table.
Halogens very reactive. One thing they have in common is that they have 7 outmost shell electrons. Chlorine is the second in that group.
Period 3 means that it has 3 occupied shells. The arrangements of the electron shells of chlorine should be 2,8,7