A ball is rolled in a straight line on a smooth frictionless surface. According to Newton's law of inertia, the ball will – A) continue to roll in a straight line and eventually slow to a stop.
B) continue to roll in a straight line and increase, then decrease in speed.
C) continue to roll in a straight line and gradually increase in speed.
D) continue to roll in a straight line and remain at a constant speed.

A

Explanation:

The ground is frictionless, which means that the ball won' slow down, until it is out of kinetic energy.

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.