If forces acting on an object are unbalanced, the object could experience a change in . mass, speed, or direction
negative acceleration or mass
direction, mass, or both
speed, direction, or both

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

Could someone me find the answer to this problem.

The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g