If an object has two forces acting on it, how can the net force equal 0?

Check explanation.

Explanation:

Net force is essentially the sum of the forces enacting upon an object. One example of net force is gravity and normal force. It is commonly accepted that every object has a force acting upon it, even if it is stationary. To give an example, the weight of an object has a force upon the earth but the earth pushes back, essentially meaning that the object will not sink.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic