<span>According to newton's second law of motion,the acceleration of an object equals the net force acting on the object divided by the objects "Mass"
Hope this helps!</span>
        
             
        
        
        
Answer:
The loop penetrate 4 cm into the magnetic field.
Explanation:
Given that,
Width w= 5 cm
Length L= 10 cm
mass m = 40 g
Resistance R = 20 mΩ
Initial velocity = 1 m/s
Magnetic field = 2 T
We need to calculate the induced emf
Using formula of emf

Put the value into the formula


We need to calculate the current 
Using Lenz's formula



We need to calculate the force
Using formula of force


Put the value into the formula


We need to calculate the acceleration 
Using formula of acceleration

Put the value in to the formula


We need to calculate the distance
Using equation of motion





Hence, The loop penetrate 4 cm into the magnetic field.
 
        
             
        
        
        
Because pH can unballence the are it is not good for are health
        
             
        
        
        
Answer:
d). X-rays
Explanation:
X -rays are also called photons. They are a packet of electro magnetic radiation. X rays originate from the shell of the electron.  X rays are highly penetrating, and have a shorter wavelength than alpha particles and the beta particles. They are similar to the gamma rays which are also has a high penetrating power and easily pass through the human body.
  Thus X rays can penetrate a skin tissue upto 2 cm thickness.
 
        
                    
             
        
        
        
Answer:
Option D is the correct answer.
Explanation:
Refer the figure given.
By Pascal's principle we have
             
F2 = 2 x 10⁴ N

Substituting
       
Option D is the correct answer.