Answer:
The electric field is 
Explanation:
Given that,
Radius = 0.357 m
Charge 
Point charge 
Distance = 0.815 m
We need to calculate the total electric field
Using formula of electric field

Where, q = point charge
r = distance
Put the value into the formula


Hence, The electric field is 
 
        
             
        
        
        
I am not sure what kind of answer you are looking for but the start of friendship.
        
             
        
        
        
Answer:
The mass of the wheel is 2159.045 kg
Explanation:
Given:
Radius 
 m
Force  N
 N
Angular acceleration 
From the formula of torque,
  Γ  (1)
                                        (1)
  Γ  (2)
                                       (2)
 
Find momentum of inertia  from above equation,
 from above equation,
 
 
  
 
Find the momentum inertia of disk,
  


 Kg
 Kg
Therefore, the mass of the wheel is 2159.045 kg
 
 
        
             
        
        
        
The answer is A. When the forces are weaker, they will not be able to hold the particles of the substances together; therefore, the substance will be observed as being volatile.
        
                    
             
        
        
        
Answer:
 M
M
Explanation:
To apply the concept of <u>angular momentum conservation</u>, there should be no external torque before and after
As the <u>asteroid is travelling directly towards the center of the Earth</u>, after impact ,it <u>does not impose any torque on earth's rotation,</u> So angular momentum of earth is conserved
⇒
-   is the moment of interia of earth before impact is the moment of interia of earth before impact
-   is the angular velocity of earth about an axis passing through the center of earth before impact is the angular velocity of earth about an axis passing through the center of earth before impact
 is moment of interia of earth and asteroid system is moment of interia of earth and asteroid system
 is the angular velocity of earth and asteroid system about the same axis is the angular velocity of earth and asteroid system about the same axis
let  
since 

⇒ if time period is to increase by 25%, which is  times, the angular velocity decreases 25% which is
 times, the angular velocity decreases 25% which is  times
  times
therefore  
  
 
 (moment of inertia of solid sphere)
(moment of inertia of solid sphere)
where M is mass of earth
            R is radius of earth

(As given asteroid is very small compared to earth, we assume it be a particle compared to earth, therefore by parallel axis theorem we find its moment of inertia with respect to axis)
where  is mass of asteroid
 is mass of asteroid
⇒ 
 
 
  =
=  +
+ 
 
 
⇒
