True because slaves were the workers and without the southerners wouldn't have nothing.
The cause of his death would be myocardial Infraction.
<u>Explanation:</u>
Atrial fibrillation is irregular heartbeat that can lead to heart failure, strokes, blood clots or any other cardiac complications. Its been said that the man experienced fibrillation when he was on the way to hospital in ambulance from this we can infer that in this stage his cardiac output would be zero or less.
This may lead to myocardial infraction, the so called heart-attack. MI occurs when a part of the heart lacks oxygen due to blockage of coronary artery that supplies the heart with pure blood (oxygenated blood).
The major factors that cause myocardial infraction are namely active smoking, old-age, high blood pressure, high-density lipoprotein or diabetes mellitus.
It is given that the autopsy resulted that the man had a blockage of the posterior interventricular artery, so from this we can conclude that the cause of death is myocardial infraction.
Radium ( a radioactive element having atomic number 88 ) was discovered by Marie Sklodowska Curie in year 1898.
Answer:
Dependent and Independent variable
Explanation:
Independent variables are defined as those variable, that can be used in order to change or control an experiment, and this variables can directly cause impact on the dependent variable.
On the other hand, dependent variables can be defined as those variable that can be tested and also measured in a particular experiment. This variable is directly dependent on the independent variable.
In the given condition, mentioning a psychological experiment, the potentially casual factor that can be easily manipulated by an investigator can be considered as a dependent variable, whereas the factor that can be influenced by the manipulated experimental treatment can be referred to as the independent variable.
