Find the value of \(p\), for which the vectors \(\bar{a} = 3\hat{i} + 2\hat{j} + 9\hat{k}\) and \(\bar{b} = \hat{i} + p\hat{j} + 3\hat{k}\) are perpendicular to each other.
Q.7 Find the value of \(p\), for which the vectors \(\bar{a} = 3\hat{i} + 2\hat{j} + 9\hat{k}\) and \(\bar{b} = \hat{i} + p\hat{j} + 3\hat{k}\) are perpendicular to each other.