When you refer to how close a measured value is to a standard, accepted or known value, you are talking about the ACCURACY of the data. This is the definition of accuracy when it comes to engineering and other fields of science. 
Accuracy is usually associated or with the term precision, as their definitions are often interchanged.
        
             
        
        
        
Answer:

Explanation:
 = Force on one side of the door by first waiter = 257 N
 = Force on one side of the door by first waiter = 257 N
 = Force on other side of the door by second waiter
 = Force on other side of the door by second waiter
 = distance of first force by first waiter from hinge = 0.567 m
 = distance of first force by first waiter from hinge = 0.567 m 
 = distance of second force by second waiter from hinge = 0.529 m
 = distance of second force by second waiter from hinge = 0.529 m 
Since the door does not move. hence the door is in equilibrium
Using equilibrium of torque by force applied by each waiter

 
        
             
        
        
        
The electric eel generates large electric currents by way of a highly specialized nervous system that has the capacity to synchronize the activity of disc-shaped, electricity-producing cells packed into a specialized electric organ. Hope this helps!! Good luck
        
             
        
        
        
Answer:
The answer is: True.
Explanation:
If free electrons or other substances could travel through the electrolyte, they would disrupt the chemical reaction. Whether they combine at anode or cathode, together hydrogen and oxygen form water, which drains from the cell. As long as a fuel cell is supplied with hydrogen and oxygen, it will generate electricity.
(Credit: Google)
 
        
             
        
        
        
To be considered a source of water pollution, the source must include a chemical is false.
<u>Explanation:
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The water pollution may be caused either by chemicals or waste materials that doesn’t contain chemicals such as domestic wastes, organic compounds, heavy metals etc. The life on Earth mostly relies on water and air, and if these two gets polluted; the results will be dangerous.
Around 70% of the planet is covered with water and the present state of its purity is a matter of a serious thought. Looking over various pollutants, only chemical wastes are not responsible to pollute the water.
Instead, there is range of elements from plastic scraps to chemical wastes that comes from either the non-point sources or the point sources. There are organic waste materials, heavy metals, volcanic eruptions, Tsunamis, earthquakes, etc. are also responsible to contaminate water and affect the amphibians as well as humans.