My fellow weebsi found this out alittle bit ago and now i dont know what to say. Yoonbum is older but he never really knew who his mother and we are told that mother was out his life quite earlier on. So is there a possibility that she left bum for some reason and then got remarried to sangwoo dad and then had sangwoo. Thus making sangwoo and yoonbum half brothers.
and also you can have the free points if you want

Diamond will scratch quartz. true or false

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.