Technician A says that when computer-controlled, electronically variable steering (EVS) is used on current trucks, it must have a full redundancy to mechanical operation. Technician B says that an advantage of EVS is that hydraulic-assist pressure can be managed independently from engine speed. Who is correct

Work = force × a. work b. energy c. distance d. momentum

How does an observation about an object differ from an inference about that object

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=