Please help me. I need both questions

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Select all the correct answers. which three statements about electromagnetic radiation are true?

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