Acertain rock has a mass of 125 g. the rock is gently lowered into a graduated cylinder whose water level is 250 ml. when the rock is completely submerged, the water level rises to 300 ml what is the volume of the rock?

gas

explanation:

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              nitroswawdasdwasdawsdwasdwasdwasdwaswasdwasdawdswasdwadwadswadadadasd gay

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.