Multiple cells are combined to create? The unit is about electric current.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

What is friction? how does it affect the motion of an object?

If a star is moving toward earth, it is