Which chemical equation represents a decomposition reaction? HELP ASAP A.) AgNO3+LiCI to AgCI+LiNO3
B.) Ca+MgS to CaS+ Mg
C.) 2H2O to 2H2+ O2
D.) 2C2H6+ 7O2 to 4CO2+ 6H2O

While carrying a heavy box up the stairs, you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.