What represents the standard deviation in a concentration profile? a. Dispersion coefficient b. Downwind velocity c. Eddy diffusivity O d. Release rate Select the appropriate choice. Dispersion coefficient is a function of? a. Release height b. Downwind distance c. Release rate d. Wind speed What is the numerical value of gravitational constant in SI unit? a. 32.174 b. 1.0 C. 9.8 O d. 6.674x10^(-11) The effectiveness of hearing protection devices is measured using a. Decibel b. Noise reduction rating C. TLV limit for noise d. Intensity