It must have verified facts, not rumors or speculation. The society, therefore, uses accuracy to rate the media organizations. The society comprises of organizations and institutions which keep records and notes. Such records and notes need accuracy for the organizations and institutions to be reliable and contemporaneous. Such accurate records help organizations make wise decisions.
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Accuracy and precision determine the kind of relationships people will have in the society. What we say is reflected on us. If we are accurate, people will have confidence in the veracity of our statements thus relate well and boost togetherness in the society. Accuracy here can be employed as a statistical measure of how well binary classification test correctly identifies and classifies a condition.
Any accuracy in real sense demonstrates the closeness of any arrow to a given target centre.
Arrows that are closer to the bulls eye are more accurate. It means that the measurement is rather close to the given value www.
Biological, chemical and physical hazards
When the arrows are set in one area, the calculated cluster is generally referred to as precise because they are always stuck together although not to the given target. The measurement precision and accuracy is usually a process established by repeated measuring the same reference standard.
It is maintained and done by the national organizations of standards. It is applied when the same measurements are averaged and repeated.
Chemical Reactions Are Basis of Our Life Essay
In this case, the common error is usually applied. When calculating the average precision of any matter, it is said that average precision is the same as a given standard SD and through division using the squire root of any given measurement. Using accuracy, it is possible to establish the difference between the reference value and the mean of the measurement.
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Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction - Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction PLANNING — Title — Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction.
Physical And Environmental Security Impact On Forensics Investigations Essay - Introduction Forensics investigations that require the analyzation and processing of digital evidence can be influenced both positively and negatively by a number of outside sources. Essay on Investigation into how to measure the rate of a chemical reaction and - Investigation into how to measure the rate of a chemical reaction and how to change the rate of a reaction.
Search Term:. In this experiment, I think part A and C are physical changes.
Physical and Chemical Change Lab
For part B and D, I think they are chemical changes. In part D, when magnesium is put with hydrochloric acid, gas releases in the product, which is one of the most significant indicator of chemical changes and the solution fizzles, another sign of chemical change. The gas is a new substances produced from the reactants.
Even I saw quite a number of signs of different changes to prove the change in each observation. Physical and chemical changes are very common in our life.
But one thing is very important, physical change can be reversed but not chemical change. Heat a piece of ice into water, and cool it back to ice! Ice becomes water, and water reverses to be ice. This simple experiment shows us the proof that physical changes can be reversed. In our life, physical changes happen all the time, substances are mixed to become a mixture, coke is also a mixture and only physical change occur after the substance are mixed, which benefits us to have something that is so good to drink, and drinking is one most important activity in our life.
Also, water changes its state if I heat or cool it, which also benefits us and important, if we want to have some cool drinks, just cool some water and turn it into ice and put the ice into the wonderful drinks. Chemical changes also occur in our life.
Oxygen reacts with metals; metals are worn by oxygen, which is very important and harmful to me because my properties that are made of metals will be damaged. Controlled burning in my body is also another important, beneficial chemical change in my body; new substances are formed from substances in my body and oxygen to maintain my life. Also, I learnt how to recognize physical and chemical changes in this experiment, some chemical and physical properties of the substances used in this experiment and signs of a chemical and physical change.
Applications of that Knowledge After I learnt how to recognize chemical and physical change, I can check the milk in my refrigerator to see if the milk has chemical change, and I can drink it or not. Return to HelpMe.
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