Answer:
2.94 × 10²⁰ N/C
Explanation:
Given that:  
The nucleus of "Lead-208 has 82 protons,
with a radius (r) 6.34×10-15 m, &
each electric charge has a value of 1.60218 × 10^-19 C
∴ The formula for calculating an electrical field at the surface of the nucleus is:
  
  
Substituting our values into the equation above, we have;
  E = 
E = 2.93870499×10²⁰ N/C
E ≅ 2.94 × 10²⁰ N/C
 
        
             
        
        
        
Ten (10%). when an animal eats the plant, 10% of it will be used.
        
             
        
        
        
Answer: body language and noises. 
Explanation:
 
        
                    
             
        
        
        
Water and sodium ions are reabsorbed in the proximal tubule in a relationship that results in a decrease in tubular fluid volume that is isotonic to plasma. 
<h3>What do you mean by Proximal tubule?</h3>
A Proximal tubule may be defined as the portion of the nephron that lies in between Bowman's capsule and the loop of Henle.
The major function of the proximal tubule is to reabsorption of sugar, sodium, chloride ions, and water from the glomerular filtrate. It decreases the volume of tubular fluid. 
Therefore, water and sodium ions are reabsorbed in the proximal tubule in a relationship that results in a decrease in tubular fluid volume that is isotonic to plasma. 
To learn more about Proximal tubule, refer to the link:
brainly.com/question/27064013
#SPJ1
 
        
             
        
        
        
Answer:
B)protons, down
Explanation:
Chemiosmosis is the diffusion of ions through a selective permeable membrane. It specifically refers to the production of ATP through the movement of hydrogen ions through an inner membrane during cellular respiration. Hydrogen ions diffuse from an area of high proton concentration to one of lower concentration.