Which of the following can be used to extinguish a fire caused by sodium,potassium,and lithium?

Select the correct statement regarding the specific disorder of the muscular or skeletal system:

Which of the following characteristics belongs to the Kingdom Animalia?

Water rises to a height $h$ in a capillary tube at the surface of the Earth. On the surface of the Moon,the height of the water column in the same capillary tube will be:

What does a virus contain?

If $\tanh ^{-1} x = a \log \left(\frac{1+x}{1-x}\right)$,$|x| < 1$,then $a$ is equal to