Which of the following is NOT something that would lead astronomers to believe a black hole might be close-by in space? a. an object that has gas and task appear to be funneling around and object

b. An object that has spinning particles around an emptiness in space that emit x-rays

c. An object that has height and depth but no width

d. an object in space with highly elevated temperatures

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the