The diagram shows particles that make up an atom. which label best completes the diagram?

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

Explain why electric current cannot exist if a current doesn't have a voltage source.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?