The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then________?

The reaction A + B → C has been conducted in a reactor as shown below. The number of boundaries around which material balance can be written, are________?

Phase lag of the frequency response of a second order system to a sinusoidal forcing function________?

C.V. (kcal/Nm3) of gaseous fuels ________ with increase in molecular weight?

Coloured glass is obtained by mixing of colored salts. Addition of ________ oxide is done to impart greenish blue color to the glass?

H2SO4 (< 50% concentration) is corrosive to________?