Inside the bar magnet, the magnetic field points from north to south. Statement A is correct.
Magnetic Field:
It is defined as a vector field or the influence of the magnet on the electric current, charges and ferromagnetic substance.
The strength of magnetic field is depends up on the numbers of magnetic field lines per unit area.
- Magnetic field lines emerge from the North pole and end in the South pole of a bar magnet. 
- Inside the magnet are also present inside the bar magnet and never intersect at any point.
Therefore, inside the bar magnet, the magnetic field points from north to south.
To know more about Magnetic Field:
brainly.com/question/19542022
 
        
                    
             
        
        
        
Answer:
1 m 
Explanation:
L = 100 m 
A = 1 mm^2 = 1 x 10^-6 m^2
Y = 1 x 10^11 N/m^2 
F = 1000 N
Let the cable stretch be ΔL.
By the formula of Young's modulus



ΔL = 1 m 
Thus, the cable stretches by 1 m. 
 
        
             
        
        
        
Answer:
2.5 m/s
Explanation:
There are calculators online that can help you easily calculate the accerlation.
 
        
             
        
        
        
Answer:
carbon + oxygen → carbon dioxide
 
        
             
        
        
        
Answer:
The ratio is  KE : TM  =  0.75 
Explanation:
from the question we are told that 
   The displacement of a mass on a spring in simple harmonic motion is A/2 from the equilibrium position 
 Generally the total mechanical  energy of the mass is mathematically represented as 
         
Here  k is the spring constant  ,  A is the total displacement of the  the mass  from maximum  compression to maximum extension of the spring 
Generally this total mechanical energy is mathematically represented as 
         
=>     
 Here the potential  energy of the mass is mathematically represented as 
      ![PE   = \frac{1}{ 2}  *  k *  [ x ]^2](https://tex.z-dn.net/?f=PE%20%20%20%3D%20%5Cfrac%7B1%7D%7B%202%7D%20%20%2A%20%20k%20%2A%20%20%5B%20x%20%5D%5E2)
Here x is the displacement of the mass from maximum compression or extension of the spring to equilibrium position and the value is   
       
So 
      ![PE   = \frac{1}{ 2}  *  k *  [ \frac{A}{2}  ]^2](https://tex.z-dn.net/?f=PE%20%20%20%3D%20%5Cfrac%7B1%7D%7B%202%7D%20%20%2A%20%20k%20%2A%20%20%5B%20%5Cfrac%7BA%7D%7B2%7D%20%20%5D%5E2)
So 
       ![KE =  \frac{1}{2}  *  k  *  A^2 - \frac{1}{2}  *  k  *  [\frac{A}{2} ]^2](https://tex.z-dn.net/?f=KE%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20%20%2A%20%20k%20%20%2A%20%20A%5E2%20-%20%5Cfrac%7B1%7D%7B2%7D%20%20%2A%20%20k%20%20%2A%20%20%5B%5Cfrac%7BA%7D%7B2%7D%20%5D%5E2)
=>    
=>    
So the ratio of   is  mathematically represented as
 is  mathematically represented as 
        
=>    