A weight lifter does 9.8 J of work while lifting a weight straight upward through a distance of 0.12m. What is the force exerted by the weightlifter?

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