Based on relative bond strengths, classify these reactions as endothermic (energy absorbed) or exothermic (energy released):

endothermic
b2+c2--> 2bc
a+bc--> ab+c

exothermic
ab+c--> ac+b
a2+c2--> 2ac
a2+b2--> 2ab

Consider motion in one dimension. (the sign of the vector quantities is their direction indicator.) an object moves in the positive x-direction with speed 2.9 m/s for 4.5 s. it stops for 3.8 s and then moves in the negative x direction with speed 2.8 m/s for 4 s. what is the total distance traveled by the object in units of meter? enter a number with two digits behind the decimal point.