Flow measurement in an open channel is done by a/an ________?

The co-ordination number in simple cubic structure is________?

For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by________?

Catalyst used in steam reforming of naphtha is________?

Number of poles in a system with transfer function 1/(s2 + 2s2 + 1) is ________?

Brunauer, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation?