Answer:
2583.9 N/C
Explanation:
Parameters given:
Outer diameter = 14 cm 
Outer radius, R = 7cm = 0.07m
Inner diameter = 7 cm
Inner radius, r = 3.5 cm = 0.035m
Charge of washer = 8 nC = 8 * 10^(-9)C
Distance from washer, z = 33 cm = 0.33m
The electric field due to a washer (hollow disk) is given as:
E = k * σ * 2π [ 1 - z/(√(z² + R²)]
Where σ = charge per unit area
σ = q/π(R² - r²) 
σ = 8 * 10^(-9) /(π*(0.07 - 0.035)²) 
σ = 2.077 * 10^(-6) C/m²
=> E = 9 * 10^9 * 2.077 * 10^(-6) * 2π * [1 - 0.33/(√(0.33² + 0.07²)]
E = 117.467 * 10^3 * (1 - 0.978)
E = 117.467 * 10^3 * 0.022
E = 2583.9 N/C
 
        
             
        
        
        
Answer:
10N
Explanation:
1. Every Action has an equal and opposite reAction.
2. If 10N of force is acted upon an wrench, then the wrench will react with an equal amount of force, but in the opposite direction.
 
        
                    
             
        
        
        
Answer:
when it hit the moving bat
Explanation:
force equals mass times acceleration which means the moving bat will add more force to the ball.
 
        
             
        
        
        
Answer:

 &
 & 
Explanation:
Given:
- interior temperature of box,  
- height of the walls of box,  
- thickness of each layer of bi-layered plywood,  
- thermal conductivity of plywood,  
- thickness of sandwiched Styrofoam,  
- thermal conductivity of Styrofoam,  
- exterior temperature,  
<u>From the Fourier's law of conduction:</u>

 ....................................(1)
 ....................................(1)
<u>Now calculating the equivalent thermal resistance for conductivity using electrical analogy:</u>




 .....................(2)
 .....................(2)
Putting the value from (2) into (1):


 is the heat per unit area of the wall.
 is the heat per unit area of the wall.
The heat flux remains constant because the area is constant.
<u>For plywood-Styrofoam interface from inside:</u>



&<u>For Styrofoam-plywood interface from inside:</u>


