Measure the mass of the Aluminum "unknown" using the torque apparatus, and the volume using the vernier caliper. Then determine its density and quantitatively compare that density to the Aluminum density value listed in Appendix II of the lab manual (show all work). Your result should be a little bit high; what would be the primary cause of such an error? Explain

i would think form in reponse to tensional forces

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

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.

the answer is a. hope this .