<em>Answer:</em>
<em>van der Waals forces</em>
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<em>Method:</em>
Online, and other sources to make sure the answer is correct.
Physiological symptoms of stress
Stress plays aggravating role in
diseases and it affects every parts of the body. Many emotional and physical
disorders have been associated with stress including stroke, anxiety, hypertension,
depression and many more. Stress symptoms can affect one’s health and can lead
to other illnesses. For the question given above, Rudolf is demonstrating physiological
symptoms of stress.
Evolution by natural selection.
survival of the fittest=natural selection
Answer:
He will use a radioactive element with a long half life of greater than 1 billion years
Explanation:
Rocks are an aggregation of solid mass which is usually rich in minerals. The age of rocks is established using radiometric dating method.
According to Oxford Dictionary, radiometric dating is "a method of dating geological specimens by determining the relative proportions of particular radioactive isotopes present in a sample."
The age of rocks can only be ascertained using isotopes that have very long half lives because many of these rocks are very old (aged billions of years) hence their age can only be determined using elements that has a half life greater than 1 billion years.
Spirilla bacteria are Gram-negative bacteria that may cause bacterial diarrhea, adenocarcinoma and peptic ulcers.
