The displacement - time graph of two particles A and B are respectively , with time axis , If the velocities of these two particles are Va and Vb, respectively then the value of Va by Vb is u have to use Va=30degree Vb =60degree
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the scientific study of the structure of substances and what happens to them in different conditions or when mixed with each other
पदार्थों की संरचना तथा विभिन्न परिस्थितियों अथवा एक-दूसरे के साथ मिलाने पर उनमें होनेवाले परिवर्तनों का वैज्ञानिक अध्ययन; रसायनशास्त्र
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