What is a capsomere?

$f(x) = e^x \sin x$, then $f^{(6)}(x)$ is equal to :

Which of the following are not electromagnetic waves?

Two wires are made of the same material and have the same volume. Wire $1$ has cross-sectional area $A$ and wire $2$ has cross-sectional area $3A$. If the length of wire $1$ increases by $\Delta x$ on applying force $F$,how much force is needed to stretch wire $2$ by the same amount $\Delta x$?

An ideal gas expands in such a way that $PV^2 = \text{constant}$ throughout the process.

The combination of $NAND$ gates shown in the figure is equivalent to: