Density of copper is 8.96 g/cm3 and density of zinc is 7.14 g/cm3 . Brass is an alloy made of copper and zinc. You are given a sample of brass with the density of 8.32 g/cm3 . The price of zinc is $1.80/kg and price of copper is $6.13/kg. Determine the material cost for making one ton of the brass sample that you have.

$4375.64 is the cost for making one ton of the brass sample of mass 1 Tonn.

Explanation:

Mass of the brass = 1 ton = 907185 g

Mass of copper = x

Mass of zinc = y

x + y = 907185, ....[1]

Volume of the brass = V

Density of the brass = D =

Volume of copper = v

Volume of zinc = v'

Density of copper = d =

Density of zinc = d' =

v + v' = V

...[2]

On solving [1] and [2]:

x = 633,419 g

y = 273,766 g

1 g = 0.001 kg

x = 633,419 g = 633.419 kg

y =  273,766 g = 273.766 kg

The price of zinc = $1.80/kg

Price of 273.766 kg of zinc = $1.80/kg × 273.766 kg = $492.78

The price of copper =  $6.13/kg

Price of 633.419 kg of zinc = $6.13/kg × 633.419 kg = $3882.86

Cost for making one ton of the brass sample :

$492.78 + $3882.86 = $4375.64

lithosphere and asthenosphere

according to the u.s. department of agriculture, the label of "certified organic" comes with a set of highly regulated standards for environmental stewardship and resource conservation. some of these include maintenance and improvement of soil quality, prevention of ground and surface water contamination, greenhouse gas regulation, encouragement of biodiversity and conservation of water and energy (see references 1). organic practices integrate natural methods such as mulching, plant diversity, native and adapted plants, crop rotation and the introduction of beneficial insects to control pests without synthetic pesticides.

environmental implications of pesticides

synthetic pesticides ensure high crop yields. while effective in achieving this goal, pesticides contaminate soil, air, ground and surface water, as well as the plants and animals that come into contact with these contaminated sources. freshwater and marine organisms are particularly susceptible to pesticides through agricultural runoff. pesticides also reduce soil fertility (necessitating the use of synthetic fertilizers) and can travel far from the original source, contaminating water and air hundreds of miles from the location of application (see references 2).

health implications of organics

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health implications of pesticides

pesticides affect human health in three ways: through skin contact, inhalation and ingestion. acute and long-term exposure to pesticides can cause serious health problems for farmers who apply them. the majority of other people are affected by drinking contaminated water and eating contaminated marine life (see references 3). pesticides have been linked to neurological disorders, endocrine and reproductive disorders, immune system deficiencies and cancer. according to the world health organization, acute pesticide poisoning (app) is responsible for significant annual mortality, especially in developing nations (see references 4).

other important considerations

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