Answer : The final energy of the system if the initial energy was 2000 J is, 3500 J
Solution :
(1) The equation used is,

where,
 = final internal energy
 = final internal energy
 = initial internal energy
 = initial internal energy
q = heat energy
w = work done
(2) The known variables are, q, w and 
initial internal energy =  = 2000 J
 = 2000 J
heat energy = q = 1000 J
work done = w = 500 J
(3) Now plug the numbers into the equation, we get

(4) By solving the terms, we get




(5) Therefore, the final energy of the system if the initial energy was 2000 J is, 3500 J
 
        
             
        
        
        
Answer:
<h3>The answer is 1600 kgm/s</h3>
Explanation:
The momentum of an object can be found by using the formula
<h3>momentum = mass × velocity</h3>
From the question
mass = 200 kg
velocity / speed = 8m/s
We have
momentum = 200 × 8
We have the final answer as
<h3>1600 kgm/s</h3>
Hope this helps you
 
        
             
        
        
        
It would be: Activation Energy = 300 KJ
Hope this helps!
        
             
        
        
        
True because a nuclear power produces tons of high level radioactive waste that has to be disposed of carefully