A runner has a mass of 60 kg and a velocity of 0 m/s. What is her momentum?

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question the momentum of the runner will be 0 kgm/s since the runner's velocity is 0

Hope this helps you

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.