Histogram represents frequency over a class interval. Can it represent the frequency at a particular point value ?

Can a frequency polygon give an idea of frequency of observations at a particular point ?

Can a frequency polygon give an idea of frequency of observations at a particular point?

Alkanes can be represented by the formula

K_(m) value represents

Collision frequency (Z) of a gas at a particular pressure

Mercurous ion can be represented as

A plane electromagentic wave of frequency 25 MHz travels in free space along the x-direction. At a particular point in space and time , E=6.3 hatj V/m . What is B at the point ?