Chapter 4: Problem 21
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Chapter 4: Problem 21
These are the key concepts you need to understand to accurately answer the question.
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Get started for freeWhen two progressive waves \(y_{1}=4 \sin (2 x-6 t)\) and \(y_{2}=3 \sin \left(2 x-6 t-\frac{\pi}{2}\right)\) are superimposed, the amplitude of the resultant wave is
Let \(\omega\) be a complex cube root of unity with \(\omega \neq 1\). A fair die is thrown three times. If \(\mathrm{r}_{1}, \mathrm{r}_{2}\) and \(\mathrm{r}_{3}\) are the numbers obtained on the die, then the probability that \(\omega^{\mathrm{r}_{1}}+\omega^{\mathrm{r}_{2}}+\omega^{\mathrm{r}_{3}}=0\) is A) \(\frac{1}{18}\) B) \(\frac{1}{9}\) C) \(\frac{2}{9}\) D) \(\frac{1}{36}\)
Let \(\mathrm{P}, \mathrm{Q}, \mathrm{R}\) and \(\mathrm{S}\) be the points on the plane with position vectors \(-2 \hat{\mathrm{i}}-\hat{\mathrm{j}}, 4 \hat{\mathrm{i}}, 3 \hat{\mathrm{i}}+3 \hat{\mathrm{j}}\) and \(-3 \hat{\mathrm{i}}+2 \hat{\mathrm{j}}\) respectively. The quadrilateral PQRS must be a A) parallelogram, which is neither a rhombus nor a rectangle B) square C) rectangle, but not a square D) rhombus, but not a square
The number of neutrons emitted when \({ }_{92}^{235} \mathrm{U}\) undergoes controlled nuclear fission to \({ }_{54}^{142} \mathrm{Xe}\) and \({ }_{38}^{90} \mathrm{Sr}\) is
Among the following, the intensive property is (properties are) A) molar conductivity B) electromotive force C) resistance D) heat capacity
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