A spherical droplet of water, with density 1000 kg/m³ and diameter of 1 μrn, is falling in air. The viscosity of air is 1.85 × 10^-5 kg/m.s. Neglecting air density and assuming that the settling of droplet in air follows Stokes' Law, the settling velocity in m/s is

How the anemometer is used to determine the average velocity of air?

The important gaseous pollutants, contributing to acid rains, are

The delay between the ignition and the application of the heat source termed as

A high volume air sampler is operated for 8 hrs in a mine with the flow rate of air varying from 1.5 m³/min to 1.3 m³/min. The empty weight of the filter paper is 2.30 g and the final weight is 2.65 g. The mean concentration of the suspended particulate matter (SPM) during the study period in μg/m³ is