Erosion etc. if it's specific then rain and weathering maybe
Answer:
Subgroups S, P, D, F, including elements of blocks s, p, d, f, respectively.
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Answer:
B). Allow efficient gathering of unobservable phenomena.
Explanation:
Surveys are described as the method of gathering information from a specified group of respondents for purposes like research or assessment of the truth of thoughts or opinions associated with a process.
As per the question, one of the most considerable benefits of the survey is that 'it allows the efficient gathering of unobservable phenomena'. The data associated with phenomena like stated preferences, behaviors, beliefs, and factual information are unobservable and can not be collected through observation but surveys help in doing so as well as in the assessment of the validity or reliability of the existing propositions about such phenomena. Thus, <u>option B</u> is the correct answer.
Answer:
a) E = 17.55 MeV
b) E = 18.99 MeV
c) E = 3.29 MeV
d) You can use the methods applied for the other parts to solve this, the equation is not properly written
e) E = 4.075 MeV
Explanation:
Energy Released, 

Mass of 1H, 
Mass of 2H, 
Mass of 3H, 
Mass of Helium, 
Mass of Beryllium, 
Mass of neutron, 
a) 

Energy released,

Energy released = 17.55 MeV
b) 

Energy released,

c)
+ n

Energy released,

E = 3.29 MeV(Energy is released)
d) You can use the methods applied for the other parts to solve this, the equation is not properly written
e) 


E = 4.075 MeV ( Energy is released)