The binding energy per nucleon is proportional to the number of neighbours \( p \), and the constant \( k \). Since the binding energy is related to the range of nuclear force, which affects how the force is distributed among nucleons, the energy is directly proportional to the number of neighbouring nucleons. Therefore, the binding energy per nucleon is given by:
\[ \text{Binding energy per nucleon} \propto p k \]
Thus, the binding energy per nucleon is \( p k \).
The focus of the parabola \(y^2 + 4y - 8x + 20 = 0\) is at the point:
Let \( S \) denote the set of all subsets of integers containing more than two numbers. A relation \( R \) on \( S \) is defined by:
\[ R = \{ (A, B) : \text{the sets } A \text{ and } B \text{ have at least two numbers in common} \}. \]
Then the relation \( R \) is:
The centre of the hyperbola \(16x^2 - 4y^2 + 64x - 24y - 36 = 0\) is at the point: