How do scientist check repeatability of results​

If y gets smaller as x gets bigger and y have an relationship?

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

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