The 1H NMR spectrum below corresponds to an unknown compound with the molecular formula C5H8O2. Deduce and draw the structure of the molecule from the data below.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.