Answer:

The Magnitude of electric field is in the upward direction as shown directly towards the charge  .
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Explanation:
Given:
- side of a square,  
- charge on one corner of the square,  
- charge on the remaining 3 corners of the square, 
<u>Distance of the center from each corners</u>


∴Distance of center from corners, 
Now, electric field due to charges is given as:

<u>For charge  we have the field lines emerging out of the charge since it is positively charged:</u>
 we have the field lines emerging out of the charge since it is positively charged:</u>

<u>Force by each of the charges at the remaining corners:</u>

<u> Now, net electric field in the vertical direction:</u>


<u>Now, net electric field in the horizontal direction:</u>
 
 
So the Magnitude of electric field is in the upward direction as shown directly towards the charge  .
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D, Mercury as a weaker gravitational pull! Due to mercury being farther from the sun and it being a smaller planet it has a weaker pull
        
                    
             
        
        
        
120 is your answer. 120 mL = 120 cm^3
        
                    
             
        
        
        
The mass of the aeroplane is 300,000 kg.
<h3>What is Newton's second law of motion?</h3>
It states that the force F is directly proportional to the acceleration a of the body and its mass.
The law is represented as 
F =ma
where acceleration a = velocity change v / time interval t
Given is the aeroplane lands at a speed of 80 m/s. After landing, the aeroplane takes 28 s to decelerate to a speed of 10 m/s. The mean resultant force on the aeroplane as it decelerates is 750 000 N.
The force expression will be
F = mv/t
Substitute the values and we have
750000 = m x  (80 -10)/ 28
750,000 = m x 2.5
m = 300,000 kg
Thus, the mass of the aeroplane is 300,000 kg.
Learn more about Newton's second law of motion.
brainly.com/question/13447525
#SPJ1
 
        
             
        
        
        
Answer:
I didn't know these questions sorry