an athlete throws a javelin to a maximum distance of 80m. how long is it in air and what height it does rises? neglete the heihjt of athlete.(relate problem with projectile motion)

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=