What is the settling velocity of a particle having a stoke's diameter of 10micrometer and a density of 1g/cm3?

In air at 1.00 atm pressure and 0 celsius? the viscosity of air at 0 celsius is 170.8 micropoise. The density of air under these conditions is 1.29g/L

Just divide atm by micros:
1.00 / 170.8

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A typical dust particle has a diameter of about 10.0 um. If 1.0 mole of dust particles were laid end to end a?

A typical dust particle has a diameter of about 10.0 um. If 1.0 mole of dust particles were laid end to end along the equator, how many times would they encircle the planet? The circumference of the Earth at the equator is 40,076 km.

1 mole is approx 6 x 10^23 particles so multiply by diameter to get length in um and convert to km (10^9 um in a km) then divide by circumference of earth

A coal dust particle is determine in the lab to have diameter 17 micrometers?

A-what is the diameter in the centimeters?
b-what is the diameter in inches?

First off its micro-meters. That means millionths of a meter.
A centimeter is one hundredth of a meter. How many hundreds does it take to make a million? Can you do that much math on your own??? Try. Try hard !!

Particles approximately 3.0X10^-2cm in diameter are to be scrubbed loose from machine parts in an aqueous -?

Ultrsonic cleaning bath. Above what frequency should the bath be operated to produce wavelengts of this size and smaller?

Frequency = speed/wavelength

since the wavelength is to be < 3e-2 cm = 3e-4 m , the frequency must be:
f > speed/(3e-4)
= (speed/3)e4

The speed of sound in water is about 1500 m/s (although it varies with impurities and temperature). Therefore,
f > (1500/3)e4 = 5e6 Hz = 5000 kHz

What is the Range of Diameters of Collidal Particles ( in solutions- chemistry)? What is the Range of Diameters of Collidal Particles ( in solutions- chemistry)?

A colloid is a type of mixture that appears to be a solution but it is actually a mechanical mixture. A colloid consists of two separate phases: a dispersed phase and a continuous phase. In a colloid, the dispersed phase is made of tiny particles or droplets that are distributed evenly throughout the continuous phase. The size of the dispersed-phase particles are between 1 nm and 100 nm in at least one dimension.

http://en.wikipedia.org/wiki/Colloid