The density at any point on a semicircular lamina with diagonal placed on the x-axis with center on the origin is proportional to the distance from they-axis. Find the center of mass of the lamina.

Which of the following statement is false ? a.batteries should never be stored on metal trays or outside in the elements)b, battery acid cannot be neutralized)c.do not stack batteries on top of each other)d.never put a damaged battery in a dumpster. i