A student sets up the investigation shown below. Water is poured over the sand. Duy Clear container with sand sprinkled with colored powder Colored water flows across the sand and into the water. Water What does the movement of colored water across the sand into the water best model? < PREVIOUS O2 4 Os​

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Rohit is trying to tune an instrument

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=