The car transports 180 m in 12 s. Calculate its speed and express it in m / s and in km / h

Explanation:

Given parameters:

Distance  = 180m

Time  = 12s

Unknown:

Speed  in m/s and km/hr

Solution:

Speed is the distance divided by the time taken,

   Speed  =  

So;

     Speed  =   = 15m/s

   1000m = 1km

  3600s  = 1hr

Therefore;

   15 x m x  x x    = 54km/hr

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)