19. Classify the chemical reaction photosynthesis as ender- gonic or exergonic. Explain.
20. Explain why the total amount of energy does not decrease in an
exergonic chemical reaction.
3 21. Explain How can an endergonic reaction not be endothermic?
22. Classify the reaction that makes a firefly glow in terms of energy
input and output.
23. Think Critically To develop a product that warms people's hand
would you use an exothermic or endothermic reaction? Why?

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

a=d/t

a="triangle"v/t

explanation:

a = acceleration