A piece of balsa wood, a piece of maple, and a ping-pong ball are released under water. Density of a piece of balsa wood is 0.739 g/cm3. What is its initial acceleration?

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b