During an investigation, similar effervescent tablets were dropped into a beaker containing cold water and a beaker containing tap water. the table below shows an incomplete record of the investigation. investigation results beaker time taken for the tablet to dissolve (seconds) cold water (50 ml) 68 tap water (50 ml) ?

The answer would be B. Less than 68 seconds as rate of reaction is higher for tap water because when you add a solute to cold water, it does not dissolve in the solvent as to putting the solute in room temperature or warm water.

girl imma just put my comment here because i need a couple point okurrttt

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.