Peoples Physics Book Version-3

26.1. Appendix A: Answers to Selected Problems (3e) http://www.ck12.org

2. 4.0%

3. 12%

24. 14800 J

25. 12,000 J

26. b. 720 K,300 K,600 K c. isochoric; isobaric d. C to A; B−C e. 0.018 J


27. b. 300 K,1200 K
    
    
    1. 1753 J
       2.−120 J
    
    
    2. 80 J
    
    
    3. 35 J
       5.−100 J,80 J,80 J
    
    
    
    

Ch 20: Special and General Relativity

1. longer
   2.γ=∞, the universe would be a dot


2. 76.4 m, 76 .4 m
   4..
   5.γ= 1. 002


3. 
   
   
   
   9. 15 × 107 m/s
   
   
   
   


4. 
   
   
   
   2. 6 × 108 m/s
   
   
   3. 0.659 km
   
   
   4. 
      
      
      
      22. 4
      
      
      
      
   
   
   5. 
      
      
      
      4. 92 × 10 −^5 m/s
      
      
      
      
   
   
   6. 14.7 km
   
   
   
   


5. 2900 m


6. 
   
   
   
   1. 34 × 10 −^57 m
   
   
   
   


7. 0.303 s


8. 
   
   
   
   2. 9 × 10 −^30 kg, yes harder to accelerate
   
   
   
   


9. f


10. c


11. 
    
    
    
    4. 5 × 1016 J; 1. 8 × 1013 softballs
    
    
    
    


12. 
    
    
    
    1. 568 × 10 −^13 J
    
    
    
    


13. 
    
    
    
    3. 04 × 106 J
    
    
    
    

Ch 21: Radioactivity and Nuclear Physics

1..
2..
3..
4..
5..

1. SubstanceAdecays faster thanB


2. SubstanceBbecause there is more material left to decay.