Briefly explain the difference between electron beam and laser diffraction.

Design a meaningful study in a well-equipped lab that will determine the impact of pH change on your favourite food in the year 2049.

Name at least three Native Indian stereotypes and discuss how European Americans use (d) these popular views. This is a course on the North American Indian (anthropology)

3. (a) Determine the diffusion coefficient of O2 (σ = 0.40 nm2 ) at 1 bar and 25 o C?

(b) The diffusion coefficient of C2H6 at 298 K and 1.00 atm is 1.307×10-5 m2 s-1 . What is the collision diameter of C2H6 based on its diffusion coefficient?

(c) Calculate the rate of diffusion, Jz of a gas at 300 K with λ = 1.00 × 10-5 cm, d = 3.16 × 10-8 cm, and M = 30.0 g mol-1 , if a concentration gradient is 1.00 × 10-7 mol cm4 ?

(d) The sheets of copper area of 1.50 m2 are separated in air by 10.0 cm. What is the rate of heat transfer from the warm sheet, 50°C to the cold sheet, - 10°C?

Given : κ (air) = 0.1241 J K-1 m-1 s-1

How and why was the distinction between soldier and civilian increasingly blurred, and in some cases obliterated, during the First World War?

*Weathering, Soil and Mass Wasting*

FILL THE BLANKS

10. The downward movement of material along a curved surface of rupture, which is characterized by the backward rotation of the displaced block, is called a(n) _____.

9. The material accumulated at the base of cliffs where rocks fall is known as _____.

8. Additional weight added to a hillside, which is always the result of human activities, is called _____ .

7. Soils that are a result of intense weathering and are typically found in the tropics are _______.

6. A rapid downslope mass movement of snow and ice is called a(n) ____.

5. _____ is an essential component of soil as it provides nutrients to plants and increases the ability of the soil to retain _____.

4. A(n) ____ soil forms where the parent material has weathered, whereas ____ soil develops from eroded material that was weathered at another location.

3. Geologists call the downslope movement of material under the direct influence of gravity _____ .

2. All slopes are constantly adjusting to new conditions, which means they are in a state of _____.

1. A general term for mass movements of earth is ______.

Please Use your keyboard (Don't use handwriting) Thank you..

Courses Name: Environmental Health

need new and unique answers, please. (Use your own words, don't copy and paste)

Please i need more than 500 words

Q. 1. Explain the environmental pollution (air, water, soil and food) health issues in KSA.

Q. 2. Describe the sources and pathways of exposure groups.

Q. 3. Enumerate methods to control and prevent pollution.

Q. 4. How public health policy and environmental law supporting to promote public health?

Please i need more than 500 words

Question 1)
About 90% of the gold ever mined throughout human history is still in circulation; however, only about 55% of all the silver ever mined is still in circulation.  Why do you think there is such a difference?  Explain. 

Question 2)
Categorize each of the following words or phrases as being associated with either open-pit mining (O) or underground mining methods (U)
dust and sedimentation problems                 ["U", "O"]      
  use drifts and stopes                                   ["U", "O"]         
 more dangerous                                              ["O", "U"]         
 best for disseminated ores                             ["O", "U"]         
 more waste  
 ["U", "O"]   
 use benches 
   ["O", "U"]         
 best for vein ores                           
 ["O", "U"]           
far cheaper
  ["O", "U"]           
requires high grades
     ["O", "U"]

one mole of a liquid solution containing 60.0 mole% benzene and the remainder toluene enters a flash column.The liquid product stream contains 47.0 mole% benzene and the vapor product stream contains 69.0 mole % benzene.The temperature of both output stream is at 93oC.If the operation is adiabatic,what is the temperature of the input stream that enters the flash column?

Should Pluto be classified as a planet or not? If so, why, and would this open the classification of many objects in our solar system? If Pluto is not a planet, why not? explain briefly.

Feijoa juice is being concentrated using an ultrafiltration membrane to remove excess water. The dilute feed flows in at 600 m/hr with 5 % solids (wt/wt) and density 1015 kg/m3. The desired concentration of the juice is 16 % total solids. A tubular membrane system is chosen, with membrane tubes of 3 cm internal diameter. The system operates with a pressure differential of 3000 kPa applied across the membrane.
a) What is the main advantage of using membrane separation to concentrate feijoa juice instead of evaporation?
b) Determine the mass flow rates of the feed, permeate and retentate streams in kg/s.
c) If the permeability constant of the membrane is 5 × 10-5 kg/[m2 kPa s], what is the total length of membrane tube required?
d) Explain how concentration polarisation will affect transmembrane flux in this process. You may include relevant equations in your explanation.

Write an essay on the logic of Songhay's “hauka” spirit possession ritual, based on the book Fusion of the Worlds. “Logic” has to do with reason and rationality. What’s the reason for the “hauka” ritual, and what makes it rational, from the Songhay point of view? Be sure to describe the “hauka” possession ritual in as much detail as possible. In what ways do the details of the ritual help us understand the “logic” of the ritual?

describe and elaborate on the importance of East Timor. Include qualitative AND quantitative information, including countries, cities, dates, and names.

explain its significance.