When the damping co-efficient (ξ) is unity, the system is ________?

The activity of an ideal gas is numerically ________ its pressure?

One Newton is equal to ________ dynes?

Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ________ this is normally not done?

A suitable material of construction to use with fuming sulphuric acid is________?

Centrifugal compressors compared to reciprocating compressors________?