18N+F3=-12N
F3=-30N
how did they find -30Nhow did they find negative end ​

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2