Peoples Physics Book Version-3

http://www.ck12.org Chapter 26. Answers to Selected Problems

13. 80 Hz; 0.6 m
    
    
    1. 0.457 m
    
    
    2. 0.914 m
    
    
    3. 1.37 m
    
    
    
    


14. 2230 Hz; 2780 Hz; 2970 Hz


15. 498 Hz


16. 150 m/s

Ch 12: Electricity

1..
2..
3..
4..
5..
6..
7..
8..
9..
10..
11. b. 1350 N c. 1350 N

1. 
   
   
   
   1. 1 × 109 N/C
   
   
   
   


2. 9000 N
   12.Fg= 1. 0 × 10 −^47 N andFe= 2. 3 × 10 −^8 N. The electric force is 39 orders of magnitudes bigger.


3. 
   
   
   
   1. 0 × 10 −^4 C
      14..
   
   
   
   


4. a. down b. Up 16c, 5. 5 × 1011 m/s^2 e. 2. 9 × 108 m/s^2


5. Toward the object


6. 
   
   
   
   3. 6 × 104 N/C to the left with a force of 2. 8 × 10 −^7 N
   
   
   
   


7. Twice as close to the smaller charge, so 2 m from 12μC charge and 1 m from 3μC charge.


8. 0.293 N and at 42. 5 ◦


9. 624 N/C and at an angle of− 22. 4 ◦from the+x−axis.


10. 7500V


11. 1.5 m/s


12. 
    
    
    
    6. 4 × 10 −^17 N
    
    
    
    


13. 1300V


14. 
    
    
    
    2. 1 × 10 −^16 J
    
    
    
    


15. 
    
    
    
    2. 2 × 107 m/s
    
    
    
    


16. b. 0.25m c.FT= 0 .022 N d. 0. 37 μC

Ch 13: Electric Circuits –Batteries and Resistors

1. 
   
   
   
   1. 4.5C
   
   
   2. 
      
      
      
      2. 8 × 1019 electrons