A solid has a mass of 200g in Air and when partly immersed in a certain liquid, it has a mass of 160g. Given that the relative density of the liquid is 0.8,calculate the volume of the solid immersed in the liquid

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=