Answer: D. ➡️⬅️
Explanation: I just knew the answer ;) 
 
        
             
        
        
        
Answer:
40 V 
Explanation:
  I will assume that  the resistors are 
            100 and 3900 and 1000 OHMS    <=====(NOT W)
In series , the resistances add together 100 + 3900 + 1000 = 5000 ohms total
V = IR
I = V / R      so the total current will be   200 v / 5000 ohms = .04 amps 
                    this is the current through all of the resistors
       so for the   1000 ohm resistor     V = IR     .04 (1000) = 40 V
 
        
             
        
        
        
Explanation:
because it doesn't depend upon other unit like kg meter and second
 
        
             
        
        
        
Answer:
The answer to the question is as follows
The  acceleration due to gravity for low for orbit is  9.231 m/s² 
Explanation:
The gravitational force is given as 

Where  = Gravitational force
 = Gravitational force
G = Gravitational constant = 6.67×10⁻¹¹
m₁ = mEarth = mass of Earth = 6×10²⁴ kg 
m₂ = The other mass which is acted upon by   and = 1 kg
 and = 1 kg
rEarth = The distance between the two masses = 6.40 x 10⁶ m
therefore at a height of 400 km above the erth we have
r = 400 + rEarth = 400 + 6.40 x 10⁶ m = 6.80 x 10⁶ m
and   =
 =  = 9.231 N
 = 9.231 N
Therefore the acceleration due to gravity =   /mass
 /mass  
9.231/1 or 9.231 m/s² 
Therefore the acceleration due to gravity at 400 kn above the Earth's surface is  9.231 m/s² 
 
        
                    
             
        
        
        
Answer:
Mg will replace Ag in a compound
Explanation:
A single replacement reaction is driven by the position of ions on the activity series. 
As a rule of thumb, the position of metal ions on the activity series determines their reactivity. 
Metal ions that are above another are more reactive and they will displace those that are lower. 
Generally, activity increases as we go up the group. 
Mg ions are higher than Ag ions on the series so, Mg will displace Ag from a solution.