Which mineral element is present in the structure of the amino acids cysteine and methionine?

The uncertainty in the location of a circulating electron is equal to its de-Broglie wavelength. The minimum percentage error in the measurement of its velocity under these circumstances will be approximately:

If $x = \sqrt{7 + 4\sqrt{3}}$,then $x + \frac{1}{x} = $

In the closest packing of atoms,there are

Which of the following is an incorrect pair?

An inductive circuit contains a resistance of $10 \, \Omega$ and an inductance of $2.0 \, H$. If an $AC$ voltage of $120 \, V$ and frequency of $60 \, Hz$ is applied to this circuit,the current in the circuit would be nearly......$A$.