Our experiences, environment and even genetics form our beliefs and attitudes. In turn, these beliefs influence our behaviour, and determine our actions. Beliefs that are widely accepted become part of our culture and, in many ways, shape the society we live in.
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The historical event in the medieval period that led to European interest in trade with the Middle East was the European Crusades. The correct option among all the options that are given in the question is the first option or option "A". I hope that the answer has come to your help.
<span>Doppler radar measures wind speeds, conventional weather radar does not.</span>
Answer:
B and C
Explanation:
B. In a given rock sample, the amount of Silicon-32 isotopes gets divided in half about every 170yrs.
This is the concept of half-life. Half life is the time take for half of a radioactive isotope to disintegrate. The shorter the half life the faster the isotope disintegrates.
From the question, we were told that it would take 170yrs for half of the isotope of Silicon to disintegrate to Phosphorus. This is the half life.
C. The half life can be used to determine the amount of Si-32 that has decayed from the time closure temperature was reached.
The closure temperature is very important in radioactivity. It is the temperature at which a system has cooled and there is no resulting disintegration of parent and daughter isotopes.
From first order kinetics, we know that the rate at which radioactive elements decay at any time is directly proportional to the number of radioactive atoms present. A knowledge of the half life helps to figure out the number of atoms that has decayed in time.
The Office Administrator/Manager
The office administrator has the responsibility of making sure all office activities run smoothly and efficiently
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