Answer:
Parallax would be most effective in measuring distances to stars which are close to the Earth.
Explanation:
In the experiment,
- The parallax shift would decrease as the pencil would move further away from the scientist's eye, so option 1 would be invalid.
-  the size of the pencil remains constant, so option 2 would be invalid. 
- the parallax shift can be observed when the pencil has objects in the background to provide relation, that is to say, the shift of the pencil when seen relative to background objects; therefore, if we assume that the pencil is a star nearby to the Earth, and the background objects are stars that are further away, then the shift of, and thus, distance to the nearby star can be easily observed.
 
        
             
        
        
        
Answer:
The iceberg is 16 kilometers in area...8 kilo's long and 2 wide
Explanation: 8 kilo's long and 2 wide
 
        
             
        
        
        
A magma's viscosity is directly related to its 
SILICA CONTENT
        
                    
             
        
        
        
You would definitely not expect political stability in a state that is being annexed or which does not have a territory - rather the opposite would be true. 
Both multinational and souvereign states can have a high lever of political security. However, in a multinational state one can also expect some conflicts between the different ethnic groups - therefore the best answer is "a sovereign state" 
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By rename do you mean turn into an improper fraction?
if so, it is because without turning it into an improper fraction, you cannot subtract 3/4 from 1/4 because you would get a negative answer and that would be incorrect