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Physics 9th: Motion | Scalar and Vector Quantities
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Physics 9th: Motion | Introduction
MOTION: INTRODUCTION The most important characteristic of all moving bodies is that they change their position with time. A body…
Introduction of Real Numbers and Euclid’s Division Lemma
INTRODUCTION: We have already studied about irrational numbers in previous class. Now, we will study the real numbers and also…
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Subtraction of vectors Since, $latex \displaystyle \overrightarrow{A}-\overrightarrow{B}=\overrightarrow{A}+(-\overrightarrow{B})$ and $latex \displaystyle |\overrightarrow{A}+\overrightarrow{B}|\,=\,\sqrt{{{A}^{2}}+{{B}^{2}}+2AB\cos \theta }$ $latex \displaystyle \Rightarrow $ $latex \displaystyle |\overrightarrow{A}-\overrightarrow{B}|\,=\sqrt{{{A}^{2}}+{{B}^{2}}+2AB\cos…
CBSE 10th Chemistry | Chemical Reactions and Equations -NCERT Questions with Answers
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CBSE 10th Chemistry | Chemical Reactions -NCERT Questions with Answers
Chemical Reactions -NCERT Questions with Answers Question 1. Why should a magnesium ribbon be cleaned before burning in air? Answer.…