Atoms with same number of neutrons, but different number of nucleons are called________?

Which of the following is the „Blasius equation‟, relating friction factor to the Reynolds number?

Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan________?

For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because________?

Brazing is the joining of metals________?

The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if________?