Id say d because it releases hydrogen and on the other hand a base receives it
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Answer:
it depends on wether the + and - are facing eachother
or away from eachother
Explanation:
B) The amount of work done
Answer:
A controlled variable does not change during a experiment
Explanation:
it's c
Answer:
the normal force
Explanation:
The free-body diagram represents all the forces acting on an object. In this example, there are four forces acting on the box: an applied force, the friction (which always act opposite to the applied force), the weight of the box (which is always downward), and the normal force.
The normal force is the reaction force exerted by the surface on which the box is moving on the box, and this reaction force is always opposite to the force exerted by the box on the surface. Since the latter is downward, it means that the normal force must be upward, so in the diagram it is wrong.
