An expense such as advertising could be considered a discretionary fixed cost. true or false

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.

What is the equation for electrical work?