Gases do not conduct heat well. 
        
                    
             
        
        
        
Answer:
38 cm from q1(right) 
Explanation:
Given, q1 = 3q2 , r = 60cm = 0.6 m
Let that point be situated at a distance of 'x' m from q1.
Electric field must be same from both sides to be in equilibrium(where EF is 0). 
=> k q1/x² = k q2/(0.6 - x)²
=> q1(0.6 - x)² = q2(x)² 
=> 3q2(0.6 - x)² = q2(x)²
=> 3(0.6 - x)² = x²
=> √3(0.6 - x) = ± x 
=> 0.6√3 = x(1 + √3) 
=> 1.03/2.73 = x 
≈ 0.38 m = 38 cm = x
 
        
             
        
        
        
Instead of washing vegetables in running water, fill a bowl of water and wash inside the bowl.
        
             
        
        
        
By definition, the gain in PE (potential energy) is
ΔPE = m*g*h
Given:
mg = 40 N  (Note that m*g = weight)
h = 5 m
ΔPE = (40 N)*(5 m) =200 J
Answer: 200 J
        
                    
             
        
        
        
D.  The atomic mass in amu is basically the number or nuclei since the mass of the electrons is negligible.  For a given atom (element) the number of protons is fixed.  Say the element has 10 protons.  If the atomic weight is 14 atomic mass units (amu), you know that there are 4 neutrons, since both neutrons and protons are 1 amu each and there are 10 protons