Answer:
The intensity of the electric field is

Explanation:
The electric field equation is given by:

Where:
- k is the Coulomb constant 
- q is the charge at 0.4100 m from the balloon
- d is the distance from the charge to the balloon 
As we need to find the electric field at the location of the balloon, we just need the charge equal to 1.99*10⁻⁷ C.
Then, let's use the equation written above.


I hope it helps you!
 
        
             
        
        
        
To be considered a source of water pollution, the source must include a chemical is false.
<u>Explanation:
</u>
The water pollution may be caused either by chemicals or waste materials that doesn’t contain chemicals such as domestic wastes, organic compounds, heavy metals etc. The life on Earth mostly relies on water and air, and if these two gets polluted; the results will be dangerous.
Around 70% of the planet is covered with water and the present state of its purity is a matter of a serious thought. Looking over various pollutants, only chemical wastes are not responsible to pollute the water.
Instead, there is range of elements from plastic scraps to chemical wastes that comes from either the non-point sources or the point sources. There are organic waste materials, heavy metals, volcanic eruptions, Tsunamis, earthquakes, etc. are also responsible to contaminate water and affect the amphibians as well as humans.
 
        
                    
             
        
        
        
Answer:
The acceleration of  is
 is  
Explanation:
From the question we are told that 
     The mass of first block is  
     The angle of inclination of first block is  
     The coefficient of kinetic friction of the first block is  
       The mass of the second block is  
      The angle of inclination of the second block is  
       The coefficient of kinetic friction of the second block is 
The acceleration of  are same
 are same 
The force acting on the mass  is mathematically represented as
 is mathematically represented as 
      
=> 
Where T is the tension on the rope 
The force acting on the mass  is mathematically represented as
 is mathematically represented as    
   
    
At equilibrium 
   
So 
  
making a the subject of the formula 
     
substituting values 
     => 
      
 
        
             
        
        
        
I got you b, V(final)^2=V(initial+2acceleration*displacement 
So this turns to (0m/s)^2=(50m/s)^2+2(9.8)(d) so just flip it all around to isolate d so you get 
-(50m/s)^2/2(9.8) = d so you get roughly 12.7555 meters up