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Why does increase in temperature increase the total entropy in endothermic reactions ? If you're given 2 system of equations that are planes, and you are given a point, how to find equation of line perpendicular to given? In a circle of radius 180 cm, and arc 276 cm long subtends an angle of how many radians? How many degrees? What have you done for science if any? Vector A makes an angle of 20° and B makes an angle of 110° with the x axis. The magnitudes of A= 20 mag of b = 30. Find angle of resultant?