Answer:
The stress is 
Explanation:
From the question we are told that
The diameter of the post is 
The length is 
The weight of the loading mass
Generally the radius of the post is mathematically represented as

=> 
Generally the area of the post is

=> 
=> 
Generally the weight exerted by the load is mathematically represented as

=> 
=> 
Generally the stress is mathematically represented as

=> 
=> 
You've failed because you failing becomes a statement rather than it becoming fact or what actually happened.
Answer:
False
Explanation:
Sievert is the unit of dose equivalent
Answer:
Extraneous
Explanation:
Extraneous variables are any variables that you are not intentionally studying in your experiment or test