Astronomers use the celestial sphere as a model to track the position of stars. However, the celestial sphere does not accurately describe the movement of stars in the galaxy. Why do scientists use the celestial sphere if they know it is inaccurate?

A

Models can be inaccurate if they are useful.

B

Scientists have not had time to develop a new model.

C

The stars move too fast to map them any other way.

explanation:

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a electromagnetic waves

0.19 m/s and 0.45 m/s

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.