Answer:
Therefore the resistance of the conductor is 175Ω
Explanation:
Resistance:
- Resistance of a metallic conductor is directly proportional to its length(l).
- Resistance of a metallic conductor is inversely proportional to its cross section area(A).
The notation sign of resistance is R.
The unit of resistance is ohm (Ω).
Therefore,

and



ρ is the proportional constant.
It is also known as resistivity of that metal.
Given ρ=35×10⁻⁶Ω-m
l= 20 m
A= 4.0×10⁻⁶m²

        =175Ω
Therefore the resistance of the conductor is 175Ω
 
        
             
        
        
        
Answer:
C
Explanation:
Horizontal is constant... if it was on x axis it would be a speed of 0
Please give brainliest answer
 
        
                    
             
        
        
        
The electric field strength is inversely related to the square of the distance.so  the strength of the electric field is given by

Here,   is constant depend upon medium and its value is
  is constant depend upon medium and its value is  and q is charge and  r is the distance.
 and q is charge and  r is the distance.
Given   and we know the charge of proton,
 and we know the charge of proton,  .
.
Therefore,
 
 
        
             
        
        
        
D = distance between th two trains at the start of the motion = 100 miles
V = speed of the faster train towards slower train = 60 mph 
v = speed of the slower train towards faster train = 40 mph 
t = time taken by the two trains to collide = ?
 time taken by the two trains to collide is given as 
t = D/(V + v)
t = 100/(60 + 40) = 1 h 
v' = speed of the bird = 90 mph 
d = distance traveled by the bird
distance traveled by the bird is given as 
d = v' t 
d = 90 x 1 
d = 90 miles