Answer:
Solution
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Correct option is
C
3 cm
RI=apparent depthreal depth
Substituting, 34=apparentdepth12
Therefore, apparent depth=412×3=9
The height by which it appears to be raised is 12−9=3cm
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SIMILAR QUESTIONS
A coin is placed at the bottom of a glass tumbler and then water is added. It appeared that the depth of the coin has been reduced because
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A tank is filled with water to a height of 12.5 cm. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4 cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.63 up to the same height, by what distance would the microscope have to be moved to focus on the needle again?
 
        
             
        
        
        
Answer: (a) Smaller charge is  and larger charge is
 and larger charge is  .
.
(b) Smaller charge is  and larger charge is
 and larger charge is  .
.
Explanation:
(a)  When both the spheres have same charge then force is repulsive in nature as like charges tend to repel each other.
Therefore, total charge on the two non-conducting spheres will be calculated as follows.
         
                       = 
Therefore, force between the two spheres will be calculated as follows.
         F = 
        12 N = 
        
or,     
     
     
         
This means that smaller charge is  and larger charge is
 and larger charge is  .
.
(b)  When force is attractive in nature then it means both the charges are of opposite sign.
Hence, total charge on the non-conducting sphere is as follows.
       
       
Now, force between the two spheres is calculated as follows.
     F = 
     12 N = 
    
    
     
          
 
Hence, smaller charge is  and larger charge is
 and larger charge is  .
.
 
        
             
        
        
        
B. number of oscillations in a given period of time.
        
                    
             
        
        
        
Answer:
Both are moving at 30 km/h, so their speed is the same. ... enough fuel for the trip/how long it will take. 4 Weight is a force, and so is a vector. ... c At 10 seconds David's displacement is.