Given that A+B=C and C is perpendicular to A. Further if |A|-|C|, then what is the angle.(note that this are vector) between A and B

(1) π/4 radian (2) π/2 radian

(3) 3π/4 radian (4) π radian​

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Argon, neon, and xenon are examples of

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?