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

Which of the following taxonomic categories of the housefly is incorrectly matched?

The function $f(x) = x e^{-x}, \forall x \in R$ attains a maximum value at $x$ equal to

An auditorium has a volume of $10^5 \ m^3$ and a total absorption area of $2 \times 10^4 \ m^2$. Its average absorption coefficient is $0.2$. The reverberation time of the auditorium in seconds is:

$A$ proton, when accelerated through a potential difference of $V$, has a de-Broglie wavelength $\lambda$ associated with it. If an $\alpha$-particle is to have the same de-Broglie wavelength $\lambda$, it must be accelerated through a potential difference of:

Which is the correct option for sulphur-containing amino acids?