# physics

Spherical particles of a protein of density 2.0 g/cm3 are shaken up in a solution of 20°C water. The solution is allowed to stand for 1.0 h. If the depth of water in the tube is 3.7 cm, find the radius of the largest particles that remain in solution at the end of the hour.

1. 👍
2. 👎
3. 👁
1. ρ =2 g/cm³= 2•10³kg/m³
The terminal speed of the particle is
v<h/t =0.037/3600=1.0228•10^-5 m/s.
The terminal speed of the particle of density ρ and radius R which is falling down in the water od density ρ1 =1000 kg/m³ and viscosity η is
v=2•R²•g• (ρ - ρ1)/9•η.
R=sqrt[9• η•v/2•g•(ρ - ρ1)] =
= sqrt[9•0.001•1.0228•10^-5/2•9.8•1•10³]=
=2.17•10^-6 m =2.17 μm

1. 👍
2. 👎

## Similar Questions

1. ### chemistry

Calculate the molarity and mole fraction of acetone in a 1.29 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the volumes of acetone and

2. ### general science

calculate the density of a cork of mass 24g and volume 100 cm3. what would its density be if its volume increases to 200 cm3?

3. ### chemistry

osmotic pressure of a solution containing 7g of protein in 100ml of solution is 20mmhg at37celsius calculate molecular mass of the protein

4. ### earth

The radius of the Earth is approximately 6370 km. If one could dig down straight towards the center of the Earth, one would find that the outermost 2890 km (the crust and the mantle) has an average density of about 4.5 g/cm3.

1. ### physics

A block of mass 200g and density 0.8g/cm3 is submerged in a liquid of density 0.2g/cm3. find minimum force required to keep the block floating.

2. ### Science

What is the density of a book whose mass is 1,800 g and whose volume is 300 cm3? *My Answer*You want to identify the numbers first, density = mass ÷ volume. Which would give you, 1800g ÷ 300 cm³ = 6 g/cm³. *Cant Figure Out

3. ### statistics

A column packing for chromatography consists of a mixture of two types of particles. Assume that the particles in the batch being sampled are spherical with a radius of 0.5 mm. 36% of the particles appeared to be pink and are

4. ### Chemistry

The density of table salt is 2.16 g/cm3. Detail the conversion into units of pounds per liter, and provide the density in lb/L. My solution must include a step-by-step solution with units included throughout!

1. ### natural science

What volume of copper ( density 8.96 g/cm3 ) would be needed to balance a 1.15 cm3 sample of lead ( density 11.4 g/cm3 ) on a two-pan laboratory balance?

2. ### chemistry

A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calculate the mass of pure acetic acid in 170 mL of this solution at 20 C. Answer in units of g The density of a solution of sulfuric acid is 1.29

3. ### Physical Science

A loaf of bread (volume 3200 cm3) with a density of 0.50 g/cm3 is crushed in the bottom of the grocery bag into a volume of 2400 cm3. What is the density of the mashed bread in g/cm3

4. ### Chemistry

An aqueous antifreeze solution is 40.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.05 g/cm3. Calculate the molality, molarity, and mole fraction of the ethylene glycol. molality I actually can do this whole