Answer:
The mass will stay the same throughout time
 
        
             
        
        
        
I think its c I really don't take physics but I try to help.
        
             
        
        
        
nuclear energy
Explanation:
The sunlight that reaches earth is generated by a transformation of nuclear energy. Radiant energy is a from of energy that reaches the earth from nuclear reactions in the core of the sun. 
- In this process, light nuclei combines to form larger ones through the process of nuclear fusion. 
- This process does not conserve energy and mass is converted to energy. 
- The nuclear reaction produces huge energy that goes into the solar system space and lights it up. 
- Therefore, it is a transformation of nuclear energy into radiant energy. 
- The radiant energy is made up of electromagnetic radiations. 
Learn more; 
Nuclear reactions brainly.com/question/10094982
#learnwithBrainly
 
        
             
        
        
        
Protons and neutrons have similar mass
Electrons are smaller then a proton or a neutron
        
             
        
        
        
The answer is 5kg m/s with the second momentum being 10 kg m/s. i took the test and it was right. hope this helps yalls