A small spherical marble, 1 cm in diameter and weighing 1.5 g, is sinking slowly in a calm lake, 2.5 km deep. How long will it take to reach the bottom of the lake? Assume that the marble will not encounter any obstruction as it falls down the lake floor and immediately reaches the terminal velocity upon dropping. Also, lake water can be assumed to be pure at 20 °C. The density of water at this temperature is 998.21 kg/m³ and its viscosity is 1.002 cP. Express your answer in hours and three significant figures.

write a note on 2 Dimensional Defects(All of them), Electron Microscope(TEM, SEM, STM) support your writing with pictures

Estimate the cut diameter and overall collection efficiency of a cyclone given the particle size distribution containing algae. Particle size distribution and other pertinent data are given below.   Average particle size dp, μm 1 5 10 20 30 40 50 60 >60 Wt % 3 20 15 20 16 10 6 3 7 Other design parameters are: Gas viscosity = 0.02 Cp; Specific Gravity of the particle = 3.0; Inlet gas velocity of cyclone = 14.6 m/s Effective number of turns within cyclone = 5 Cyclone diameter = 2.44 m Cyclone inlet width = 0.61 m

Derivation of the general equation for interpolation: develop from scratch the equation interpolation you need to develop