Internal energy change of a system over one complete cycle in a cyclic process is________?

A pulse tracer is introduced in an ideal CSTR (with a mean residence time I) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be________?

________ of austenite decreases the hardenability in steel?

An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?

Noise level during normal conversation among men is about ________ decibels?

Flow rate of a river is measured by a/an________?