Search: Chemistry (materials)

Number of results: 94,100

organic chemistry
You need to give a for example because MANY a materials have been replaced with petrochemicals. And many more were NEW materials and didn't replace anything.
Tuesday, June 10, 2008 at 11:11pm by DrBob222

teacher aide
I need help! What information is included in the instructional guide that accompanies most audiovisual materials? A How to operate the projection equipment to show the materials B How to duplicate the audiovisual materials C A summary of description of the contents D A ...
Tuesday, April 26, 2011 at 1:26pm by Rosie

chemistry
What raw materials are used to make lithium ion batteries? How are the raw materials used in the batteries processed? What chemical equations take place in the battery?
Sunday, March 20, 2011 at 9:00am by george

accounting
One of the adjustments for the worksheet says: * Of the $25 369.20 shown on the trial balance under Materials Used, $2 850 is still on hand and unused. Therefore I credited Materials Used by $2 850.. but which account do I debited because there is no Materials account.
Saturday, January 20, 2007 at 9:45pm by tasha

childcare
A. cost B. height C. funishing materials D. surface materials (My answer is C) Please help
Wednesday, August 25, 2010 at 8:34pm by action

Chemistry
The following are the optical properties of three materials A,B and C. Property A B C reflectivity 0.85 0.15 0.001 Absorptivity 0.1 0.7 0.1 a) Determine the transmissivity of the materials b) which material heats up fastest when illuminated? c) which one will be the most ...
Sunday, September 18, 2011 at 3:41am by John

help please
What source materials are you supposed to use? Certainly the course you're taking suggests materials that teach the subject.
Thursday, November 12, 2009 at 3:34pm by Ms. Sue

ENGLISH
WHAT ARE DIVERGENT MATERIALS? WHAT ARE CONVERGENT MATERIALS?
Thursday, November 15, 2012 at 6:47am by CHE

science
does it take 96 percent less energy to make an aluminum can from recycled materials than it does to process it from new materials?
Friday, October 28, 2011 at 9:56am by Tameika

Science-Chemistry
A student has blocks of four different materials of identical mass. The materials are ice, gold, aluminum, and Styrofoam. Which blocks would have the largest volume? Would it be gold? Also this other question: What is the total number of atoms in a single unit of the compound ...
Tuesday, April 27, 2010 at 11:59pm by Sara

Early ed
The most important consideration when installing playground equipment is? A. Cost B.height C.finishing materials D. Surface materials
Wednesday, January 12, 2011 at 9:50pm by Chris

childcare
The most important consideration when installing playground equipment is A cost B height C finishing materials D surface materials My answer is C
Tuesday, January 12, 2010 at 2:18pm by Rosa

Chemistry
Answer the following questions by referencing the six stress-strain curves below. (a) Which of the stress-strain curves are for materials that are purely elastic? A B C D E F You have used 0 of 2 submissions 1.0 POINT (b) Which purely elastic material has the highest modulus? ...
Friday, January 11, 2013 at 9:03am by Ankur

accounting
Compute the total, price, and quantity variances for materials and labor. The following direct materials and direct labor data pertain to the operations of Batista Manufacturing Company for the month of August. Costs Quantities Actual labor rate $13 per hour Actual hours ...
Tuesday, July 27, 2010 at 12:48pm by joe

managerial accounting
The following direct materials and direct labor data pertain to the operations of Solario Manufacturing Company for the month of August Costs Quantities Actual labor rate $13 per hour Actual hours incurred and used 4,200 hours Actual materials price $128 per ton Actual ...
Monday, November 15, 2010 at 11:09pm by jennifer

Chemistry (materials / metals)
With regard to #1, you need to clarify as to alternatives to platinum for what? eating? drinking? hunting? jewelry? just what? #4. This doesn't make sense. "How are the materials in your platinum and processes" isn't complete. You've left out something. 2...
Monday, December 17, 2007 at 1:50am by DrBob222

materials
What materials are you talking about?
Monday, November 15, 2010 at 7:13pm by PsyDAG

materials
are all materials in 3d?
Monday, November 15, 2010 at 7:13pm by jason

Chemistry
What is the difference in molecular chemistry between silicone polymers and other polymeric materials?
Thursday, April 4, 2013 at 4:03pm by Violet

Chemistry
What is the difference in molecular chemistry between silicone polymers and other polymeric materials?
Thursday, April 4, 2013 at 11:57am by Violet

Chemistry
What is the difference in molecular chemistry between silicone polymers and other polymeric materials?
Thursday, April 4, 2013 at 2:59am by Violet

Design
What is the difference between layering and terracing? A. More depth can be achieved with layering than with terracing. B. In layering, the materials are more three-dimensional than in terracing. C. In layering, materials such as leaves can't be reversed to reveal ...
Wednesday, January 16, 2013 at 6:56pm by Jamie

Day Care
Children will develop a sense of self-direction and competence if materials are arrangeed so that children A. must apply ingenuity to find needed materials. b. must ask a caregiver for needed materials c. can easily find matereials themselves. d. will be restricted to using ...
Friday, January 9, 2009 at 6:12pm by Cynthia

physical
Rank the following 3 classes of materials in order of increasing typical Young's Modulus: metals such as copper, plastics such as HDPE (high density polyethelene), and ceramics such as alumina (Al2O3). Do not look up the values of Young's Modulus, instead base your ...
Thursday, April 4, 2013 at 1:18pm by Anonymous

Project Management
In your course materials, you've obviously been given very specific ideas and terminology. Only you can answer these questions since no one here has access to your course materials.
Wednesday, February 22, 2012 at 7:18pm by Writeacher

chemistry
Most fuels are molecular (covalent) compounds as bobpursley pointed out. Ionic compounds do not burn. Note: Some ionic materials may decompose violently or support combustion (NaNO3, KClO4, etc.) Cesium sulfide is a stable compound that does not burn. Other flammable materials...
Monday, December 7, 2009 at 6:23pm by GK

Science
Identify 5 different materials that you encounter or use on a daily basis, and identify a mineral that is mined to supply each of those materials.
Thursday, April 5, 2012 at 4:30pm by Kelly

accounting
RC Corp. uses a job order cost accounting system. During the month of April, the following events occurred: (a) Purchased raw materials on credit, $32,000. (b) Raw materials requisitioned: $25,800 as direct materials and $10,500 indirect materials. (c) Paid factory payroll for...
Saturday, December 10, 2011 at 3:18am by Anonymous

art ???
What have you learned from your text materials? Please note that the Jiskha Homework Help Forum has no connection with any school or its materials. We help students with their homework, but we do not do it for them.
Sunday, August 23, 2009 at 10:59pm by Ms. Sue

Psychology
Your first source of information is your assigned reading materials. Your teacher is expecting you to understand these materials and use this knowledge to answer the questions. After you've answered the question, we'll be glad to critique it for you.
Tuesday, December 9, 2008 at 8:07pm by Ms. Sue

Chemistry
H6P7: Young's Modulus Rank the following 3 classes of materials in order of increasing typical Young's Modulus: metals such as copper, plastics such as HDPE (high density polyethelene), and ceramics such as alumina (Al2O3). Do not look up the values of Young's ...
Thursday, November 29, 2012 at 12:13am by Odesa

materials engineering
for: prismatic non-circular section channel which used for window frames and for ducting for electrical wiring..I need to know : 1-function 2-objective 3-constraints how can we select the materials for this design, and why? what suitable processes for manufacturing?
Friday, March 18, 2011 at 4:10am by hym

accounting
Moreno Industries has adopted the following production budget for the first 4 months of 2013. Month Units Month Units January 10,000 March 5,000 February 8,000 April 4,000 Each unit requires 3 pounds of raw materials costing $2 per pound. On December 31, 2012, the ending raw ...
Monday, May 7, 2012 at 1:01pm by lynette

Science
Students wer given materials to complete a circuit to turn on one light. The materials received were 2 wires, a AA battery, and various sizes of light bulbs. What is the variable in the experiment?
Thursday, January 10, 2013 at 10:22pm by Matt

Chemistry
What are the raw materials for polyethene and polystyrene?
Sunday, January 3, 2010 at 6:25am by Question

chemistry
There is no one answer for this. It could be hundreds of materials.
Sunday, September 27, 2009 at 2:44pm by DrBob222

Earth Science
My question is what is the ability of some natural materials to reflect and absorb sunlight? What do they mean natural materials? I could answer this on my own if I understood what is considered a natural material.
Wednesday, December 19, 2007 at 12:32pm by Lori

chemistry
Enzymes are complex pietorns that have the capacity to accelerate the biodegradation of organic materials. They can be found everywhere in nature where there is life. For example: In our bodies, there are thousands of enzymes that act for the body s energy source. We eat ...
Saturday, November 6, 2010 at 10:50pm by iIRAWxusol

Chemistry (materials / metals)
Please help with 5 questions: 1) what metals are the alternatives to platinum? 2) what are the advantages/disadvantages of these alternatives? 3) what is the life cycle of platinum? 4) how are the materials in your platinum and processes? (be sure to include redox equations in...
Monday, December 17, 2007 at 1:50am by LISA AND MICHELLE IN LA

chemistry
what are four uses of platinum? 2) for each use, what is an alternative material that could serve the same purpose? consider both conventional materials and possible new materials 3) what are some common metallic items that mighr be replaced by ceramic or plastic versions... a...
Monday, December 17, 2007 at 8:07pm by LISAINLA

accounting
The standard amount of materials required to make one unit of Product Q is 4 pounds. Tusa's static budget showed a planned production of 4,000 units. During the period the company actually produced 4,100 units of product. The actual amount of materials used averaged 4.1 ...
Wednesday, June 3, 2009 at 12:57pm by Anonymous

AP Chemistry
This is an Advance placement chemistry class. We were told to fine the materials needed to do this lab, and the procedure. i need this info so i can physically do the lab.
Tuesday, March 22, 2011 at 9:48pm by meghan

science
what are sources of paper waste materials. Explain how paper waste materials affect biological diversity in the environment.
Saturday, July 21, 2012 at 6:54pm by Denise frazier

math
The Thompson Company uses standard costing and has established the following direct material and direct labor standards for each unit of Lept. Direct materials: 2 gallons at $4 per gallon Direct labor: 0.5 hours at $8 per hour During September, the company made 6,000 Lepts and...
Thursday, March 28, 2013 at 1:46pm by lisa

Materials
Give at least one example of an application of each branch: Motion -cellphone Properties of Materials Sound -Radios Light -Candle Electricity -Calculator Magnetism -VCR's Properties of atoms -Computers Nuclear physics -?
Thursday, September 15, 2011 at 8:35pm by Anonymous

science
Im during a ppt. The questions are indentify the sources of paper waste materials. Explain how paper waste materials affect biological diversity in the environment.
Saturday, July 21, 2012 at 7:21am by tanya bush

Science
Compostable materials Non-compostable materials ?
Tuesday, April 6, 2010 at 9:24am by bobpursley

Elem. Ed. Another Question
I need help with these questions to make sure I am right. If the art center is orderly and organized, children: 1.should be free to mess up the materials and use them with abandon. 2.are inhibited because the materials are too organized. 3. can find what they need and use ...
Tuesday, April 10, 2007 at 7:23am by Keisha

Materials Degradation
1) With reference to electrochemical corrosion, explain the following phenomena: i) Anodic Polarization ii) Cathodic Polarization 2) What are two degradation mechanisms that are the responsible for the loss in molecular weight of polymeric materials?
Saturday, December 31, 2011 at 3:23am by Claire

Human Resourses
Associated costs would be: building rental maintenance of the building salary of administrator salaries of teachers and counselors salaries of paraprofessionals materials for student use other materials
Tuesday, March 3, 2009 at 4:56pm by Ms. Sue

psy - revise
L. and N. are definitely right. K. is wrong, and I'm not sure about M. Please check your text materials and follow the suggestions I made earlier. I do hope that you thoroughly studied your text materials BEFORE you attempted to answer these matching questions.
Sunday, April 20, 2008 at 10:19pm by Ms. Sue

chemistry
Is there a difference between sources of experimental error and sources of error? yes experimental error is when you did something wrong not on purpose though. like stopping the time clock too early or too late but not going back to fix it. sources of error comes from the ...
Monday, October 16, 2006 at 12:43am by Anonymous

chemistry
You need to know the masses of the two starting materials to answer this.
Thursday, November 25, 2010 at 10:13pm by Dr Russ

Chemistry
What is the product of a grignard reaction of bromotoluene and co2 as starting materials?
Tuesday, April 20, 2010 at 11:46am by Jay

organic chemistry
what's the relative cost of petrochemicals to the materials they have replaced??
Tuesday, June 10, 2008 at 11:11pm by kel

Reading
When you're scribbling a note with a pencil, do you ever wonder what this handy tool is made from? To get right to the point, a pencil is made of a number of materials. The inside is made of graphite that is reinforced with clay. Its wooden outside comes from cedar trees. ...
Thursday, January 5, 2012 at 5:18pm by Alex

chemistry
What are the materials used to create a free standing atomic model of iodine?
Tuesday, January 3, 2012 at 3:37pm by Mimi

chemistry
what must be done with the radioactive waste materials that result from splitting atoms and how is this a problem?
Monday, November 14, 2011 at 8:43pm by Sara

Chemistry
A Bunsen burner, if hooked to a gas supply, is a device for heating materials.
Wednesday, November 24, 2010 at 11:26am by DrBob22

Organic Chemistry
I don't know what the pKa is for these two materials. The previous post was just an example.
Thursday, December 4, 2008 at 11:33am by DrBob222

chemistry
Your job is to determine which of the materials SO2 will react with. Which do you think is the most probable?
Sunday, November 2, 2008 at 5:34pm by DrBob222

chemistry
Describe the differance between chemistry and chemical technology. Technology is the making of applications. Chemical technology...making chemicals for practical or commercial purposes. Chemistry...the study of materials, their reactions
Tuesday, August 16, 2005 at 4:41pm by Jane

Principles of Business
The term 'human resources' refers to: (A)persons available for productive and professional services (B)raw materials used in the manufacture of goods (C)materials and goods made by human beings (D)capital invested by shareholders in company
Sunday, April 3, 2011 at 3:15pm by Sasha

Child day care managment
A childs ability to jumb for distance is an example of ? a. agility b. flexibility c. explosive power d. reaction time my answer is c what you think? The most important consideration when installing playground equipment is ? a. cost b. height c. finishing materials d. surface ...
Wednesday, December 29, 2010 at 4:19pm by k

AP Chemistry
what are the procedures and materials needed to make a 0.10m solution of Silver(I) Chloride?
Tuesday, March 22, 2011 at 9:48pm by meghan

AP Chemistry
what is the procedure and materials needed to make a 0.10m solution of Potassium Hydroxide?
Tuesday, March 22, 2011 at 9:45pm by meghan

science
Salt can be decomposed into other materials (Na and Cl2 in the case of NaCl); an element cannot be decomposed to other materials (except of course electrons, protons, neutrons) and stay as the original element.
Thursday, September 8, 2011 at 10:46pm by DrBob222

childcare
I think you're right about the first one -- although children's diets are quite varied. I'm not sure between C and D on the second one. I'd need to know more about the playground equipment and what exactly is included in finishing materials and surface materials.
Wednesday, August 25, 2010 at 9:10pm by Ms. Sue

SS
Germany was impoverished and wanted to annex territory that would provide it with more raw materials. Japan also wanted more raw materials so tried to capture regions that could supply them.
Thursday, June 3, 2010 at 5:24pm by Ms. Sue

Teachers Aide/Language and other Barriers
Actually, since materials ordered from catalogs are expensive -- and may not be very effective, I think I'd rule out D. It also makes sense to use multicultural items in several ways. The children become more familiar with materials that they see in many contexts.
Saturday, September 25, 2010 at 11:14pm by Ms. Sue

science
How do the principles of physics and chemistry both come into play when developing new materials
Thursday, March 15, 2012 at 10:07am by long

science
How do the principles of physics and chemistry both come into play when developing new materials?
Wednesday, March 14, 2012 at 9:36am by long

Chemistry
When non-polar materials suddenly become polarized the most likely reason is due to:
Monday, November 14, 2011 at 5:08pm by Bob

chemistry
Please explain me which solution reacts faster to breakdown the materials the 25% or 10% HCL?
Sunday, September 25, 2011 at 2:31pm by Jack

chemistry
What flame color phenomena? What experiment? What materials? What did you do? We're in a vacuum here. Without your input we don't know what you're doing. (Sometimes we don't know what we're doing. :-)
Tuesday, October 19, 2010 at 8:25pm by DrBob222

chemistry
You need to use dimensional analysis only when the two materials react in other than a 1:1 ratio.
Friday, December 12, 2008 at 11:20am by DrBob222

world studies
I agree. In addition, exploration lead to new raw materials and markets for finished products. This encouraged scientific investigation into how to use these raw materials and how to efficiently make finished products.
Monday, September 3, 2012 at 10:38am by Ms. Sue

Environmental Science
The natural resources that are essential to civilization are: fuel for heating and cooking fertile soil for growing food water materials for making shelters materials for writing (paper, ink, etc.) Please look back at the websites recommended by SraJMcGin for more information ...
Saturday, November 3, 2007 at 6:08pm by Ms. Sue

science
can someone edit my lab report please? Here it is Purpose: The purpose of this experiment was to distinguish six substances observing how they react in fluids and to identify them by their properties. My hypothesis by the end of this experiment, I will discover what the ...
Wednesday, September 20, 2006 at 3:24pm by the shadow

Chemistry
voltaic cells in non-standard conditions, how does concentration of solm's effect the value of Ecell. I understand that as concentration increases so does the E-cell value but why? The half cell is E = Eo - 0.0592 log Q where Q stands for K at equilibrium and K = (ox)/(red...
Tuesday, April 17, 2007 at 4:27pm by amy

chemistry
Have you checked your text materials for conversions for meters, centimeters, decimeters, inches, feet, etc.?
Monday, July 21, 2008 at 5:29pm by Ms. Sue

physical
A solid cylinder has a radius of 0.051 m and a height of 0.0030. The cylinder is composed of two different materials with mass densites of 1950 kg/m3. If each of the two materials occupies an equal volume, what is the mass of the cylinder?
Friday, May 10, 2013 at 10:03am by Janaiby

childcare
A main source of fat and saturated fatty acids in children's diets is A. meat B. candy C. whole milk D. french fries (My answer is D) The most important consideration when installing playground equipment is A. cost B. height C. finishing materials D. surface materials (My ...
Wednesday, August 25, 2010 at 9:10pm by action

Math - Algebra word problem
Ace manufacturing has determined that the cost of labor for producing x transmissions is L(x) = 0.3x2 + 400x + 550 dollars, While the cost of materials is M(x) = 0.1x2 + 50x + 800 dollars. Write a polynomial T(x) that represents the total cost of materials and labor for ...
Saturday, November 14, 2009 at 11:56am by Ashley

ACCOUNTING
wrapping department's output during the period consist of 10,000 units completed and transfered out, and 600 units in ending work in process that were 75% complete as to materials and conversion costs.begining inventory was 800 units that were 30% equivalent units of ...
Friday, July 6, 2007 at 7:21pm by KATHY

Chemistry
Triglycerides (oils and fats) do not dissolve in water but glucose does. That should suggest a method for separating the two materials.
Saturday, November 29, 2008 at 3:16pm by GK

philosophy
I did. I pointed you in the direction of your assigned reading materials. Since your question asks you to present 3 or 4 issues about free will, I assume that they are covered in your text materials. What is free will? If you go out and get drunk tonight -- is that because of ...
Sunday, January 25, 2009 at 9:13pm by Ms. Sue

managerial Accounting
Smith Co uses a standard cost system for its single product in which variable manufacturing overhead is applied on the basis of direct labor hours. The following information is given: 4 Standard costs per unit: Raw materials (1.5 grams at $16) $24.00 Direct labor (0.75 hour at...
Thursday, September 30, 2010 at 6:48pm by Klatoyaa

Chemistry
Not solveable You need to know: what the reaction was quantities of materials used units of 5.70 (g, kg, lb, oz, mole?)
Tuesday, December 6, 2011 at 8:26am by Dr Russ

Accounts
The USA Company manufactures flags in a single process. The following information is available for January 2011: Beginning WIP o units Started production 18,000 units Completed and transferred out 12,000units Ending WIP 6,000 units Production Cost Beginning WIP inventory $0 ...
Tuesday, April 12, 2011 at 10:31am by Kesi

Teacher
I just want to make sure I have this question correct. If you want to check out free audiovisual materials, where would you go? A video store B art supply store C teacher supply store D county instructional materials center I think D, can someone tell me if I'm right. Thanks.
Tuesday, April 26, 2011 at 1:39pm by Bree

Algebra
A manufacturing company has determined that the cost of labor for producing x transmissions is: L(x) = 0.3x^2 + 400x + 550 dollars, while the cost of materials is M(x) = 0.1x^2 + 50x + 800 dollars. Need to write a polynomial T(x) that represents the total cost of materials and...
Friday, November 13, 2009 at 9:21pm by Janet

history
If a historian found an old artifact, she might ask: Who made it? When was it made? Why was it made? How was it made? What materials were used? Where and how did the maker get these materials? How was it used? Did many people use this -- or is it a specialized tool? Is it ...
Tuesday, September 6, 2011 at 8:18pm by Ms. Sue

chemistry lab
Probably they came from the stock room or wherever chemicals are stored at your facility. Both are starting materials for the synthesis of aspirin.
Sunday, March 20, 2011 at 9:48pm by DrBob222

Chemistry
Please do it i dont have all the materials and i need to do it today. PLEASE!!
Sunday, February 1, 2009 at 11:02am by James

ACCOUnting
Chen Company manufactures basketballs. Materials are added at the beginning of the production process and conversion costs are incurred uniformly. Production and cost data for the month of July 2010 are as follows. Production Data-Basketballs Units Percent Complete Work in ...
Monday, November 14, 2011 at 1:20pm by BILLY

accounting
The following cost data relate to the manufacturing activities of Black Company during the just completed year: Manufacturing overhead costs: Property taxes, factory $ 3,000 Utilities, factory 4,800 Indirect labor 9,900 Depreciation, factory 23,900 Insurance, factory 5,800 ...
Saturday, September 8, 2012 at 4:49pm by sally

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