Which of the following quantities does not depend upon the orbital radius of the satellite?

Chloropicrin is obtained by the reaction of

Let $\alpha, \beta$ be such that $\pi < \alpha - \beta < 3\pi$. If $\sin \alpha + \sin \beta = -\frac{21}{65}$ and $\cos \alpha + \cos \beta = -\frac{27}{65}$,then the value of $\cos \frac{\alpha - \beta}{2}$ is

Hydrolysis of $NCl_3$ gives $NH_3$ and $X$. Which of the following is $X$?

The output of the given logic circuit is

The number of normals drawn to the parabola $y^2 = 4x$ from the point $(1, 0)$ is