Answer: Option (b) is the correct answer.
Explanation:
The given data is as follows.
          F =  N
 N
          g = 9.8 m/s 
          radius =  
 
                     =  = 15 cm = 0.15 m   (as 1 m = 100 cm)
 = 15 cm = 0.15 m   (as 1 m = 100 cm)
Formula to calculate depth is as follows.
         F = 
or,      h =  
        
        h =  
 
            = 751 m
Thus, we can conclude that the maximum depth in a lake to which the submarine can go without damaging the window is closest 750 m.
 
        
             
        
        
        
D.all of the above is the answer for this question
        
             
        
        
        
Answer:

Explanation:
 = normal force acting on the coin
 = normal force acting on the coin
Normal force in the upward direction balances the weight of the coin, hence 

 = frequency of rotation
 = frequency of rotation 
Angular velocity of turntable is hence given as 

 = distance from the axis of rotation
 = distance from the axis of rotation 
 = minimum coefficient of static friction
 = minimum coefficient of static friction 
static frictional force is given as 

The  static frictional force provides the necessary centripetal force , hence 
Centripetal force = Static frictional force 

 
        
             
        
        
        
The resultant force on the positive charge  is mathematically given as
X=40N
<h3>What is the magnitude of the electrostatic force on the negative charge?</h3>
Question Parameters:
Three-point charges, two positive and one negative, each having a magnitude of 20
Generally, the -ve charge   is mathematically given as

Q+=X
Therefore

X=40N
For more information on Force
brainly.com/question/26115859
 
        
             
        
        
        
     In 2011 NASA researchers identified features on Mars known as Recuring Slope Lineae ( or RSL ). RSL are relatively dark and narrow features.They are thought to be a signs of salty liquid water on Mars. One hypothesis for RSL formation is that they form when underground bodies of salty water leak into the surface.
   Answer: Recuring Slope Lineae.