What conditions must be satisfied for proper acoustics in an auditorium?

In an alpha decay, the daughter nucleus produced is itself unstable and undergoes further decay. If the number of parent and daughter nuclei at time t are Nl_p and N_d respectively and their decay constant are lambda_p and lambda_d respectively. What condition needs to be satisfied in order for Nd to remain constant ?

What is acoustics of sound?

What is a proper fraction ?

What are the conditions for maximum work?

What conditions are necessary to be maintained during tissue culture?

Check whether conditions of Rolle's theorem are satisfied by the following functions: f(x) = x^2 - 2x + 3, x in (1,4)

State what precautions must be taken while performing experiment with potentiometer.

What conditions are required for a cell potential to be called standard cell potential?