Monday
October 20, 2014

Search: lead to an "efficient" allocation of resources

Number of results: 4,558

physics
Three lead balls of mass m1= 13kg, m2= 26kg, and m3= 9.6kg are arranged as shown in the figure below. Find the total gravitational force exerted by balls 1 and 2 on ball 3. Be sure to give the magnitude and the direction of this force
November 4, 2012 by Anonymous

physics
A 20 g lead bullet leaves a rifle at a temperature of 47 degrees celcieus and travels at a velocity of 500 m/s until it hits a large block of ice at 0 degrees celcuis and comes to rest within it. How much ice will melt?
January 19, 2013 by jjwatt

Physics
A 20 g lead bullet leaves a rifle at a temperature of 47 degrees celcieus and travels at a velocity of 500 m/s until it hits a large block of ice at 0 degrees celcuis and comes to rest within it. How much ice will melt?
January 19, 2013 by Joe

physics
(a) A solar collector is 12.0% efficient in gathering solar energy and converting it to heat. If the average intensity of sunlight on one day is 700 W/m2, what area(m^2) should your collector have to gather energy at the rate of 150 W? (b) What is the maximum cost ($)of the ...
July 30, 2013 by Justin

Science
Explain the four factors that produce changes in population size. Which factors are affecting the population size? What do you predict will happen to the nutria populatin after all the land is depleted of the nutris'a food resources?
March 22, 2008 by Anonymous

college/Agricultural policy
Find the price and quantity that will satisfy the condition fpr static efficiency in the use of water resources given the following demand and supply equations for water: Demand: P=600-Q Supply: P=2+Q
February 17, 2009 by jesse

Medical billing and coding
Which of the following items is used to describe items used during patient treatment as well as time spent by a professional. A)primary care provider B) Reimbursement C)Resources D)Durable Medical Equipment
January 10, 2013 by yorhe

social studies
I need to answer the questions on my study guide, it is my homework but I forgot my book,I need to read chapter 3 it's about our earth,s renewable and non renewable resources.where else I find out about it
January 21, 2014 by lily

science
What is the atomic number of a lead atom? Since this is not my area of expertise, I searched Google under the key words "lead atomic number" to get these possible sources: http://www.chemicalelements.com/elements/pb.html http://physics.nist.gov/PhysRefData/Handbook/Tables/...
March 28, 2007 by Lisa

physics
If all the solid waste of 230 million tonnes were burned in waste-to-energy power plants that are 20% efficient, a) how many kilowatt-hours of electrical energy could be produced in a year? Compare this quantity with the total U.S. electrical energy production of approximately...
November 5, 2013 by nicole

physics
If all the solid waste of 230 million tonnes were burned in waste-to-energy power plants that are 20% efficient, a) how many kilowatt-hours of electrical energy could be produced in a year? Compare this quantity with the total U.S. electrical energy production of approximately...
November 5, 2013 by nicole

Chemistry
I lost the periodic table my teacher gave me, and I need to find one online that shows charges at the top in columns, as well as charges for the elements with multiple charges online. Could you lead me to any good sources? Thanks
April 16, 2009 by Nicki

English
Help I don't under stand Spondee, I am supposed to find the spondee in these lines...."Who loved his charge but never loved to lead; One whose meek flock the people loved to be, not lured by any cheat of birth."
September 26, 2011 by Christy

chemistry
A graduated cylinder contains 155mL mL of water. A 17.0g g piece of iron (density = 7.86g/cm 3 g/cm^3 ) and a 23.0g g piece of lead are added. What is the new water level in the cylinder?
September 19, 2013 by uta

physics
One end of a uniform 4.0-m long rod of weight is supported by a cable. the other end rests against the wall, where it is helf by friction. The co-efficient of static friction between the wall and the rod is .50 Determine the minimum distance,x,from point A at which an ...
January 25, 2007 by cyndi

science
Discuss in 200 to 300 words, the importance of the science of geology to us as a civilization. Give at least two examples. For example, the ability to predict earthquakes and other disasters, or understanding mining and the use of natural resources. can u help me get a better ...
July 2, 2009 by scooby9132002

marketing
The economic environment a.of an individual country has little effect on other countries. b. refers to the application of science to convert resources to output. c. includes changes in interest rates and inflation. has little impact on an organization's marketing strategy. d. ...
January 26, 2013 by Andrew

question?
i think its A.?? What are some ways to avoid plagiarism? A.only using the main ideas and important details from the website B.By giving credit for others’ ideas, images, and information found in various resources C.Using quotation marks D.All of the above
May 20, 2014 by matt

Economics - Demand: Multiple Choice
A switch on the part of the public from large cars to smaller cars should cause the demand curve for gasoline to tend _______________. a) not be affected b) shift to the right c) rise d) both b and c e) shift to the left I'm confused by this question because I'm not sure if ...
March 5, 2008 by Anonymous

SCI 275
Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix C. How did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic levels? Considering ...
November 12, 2007 by dawn

Physics Urgent!!!!!
Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in the late 18th century by...
April 30, 2011 by Abi

Physics Urgent!!
Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in the late 18th century ...
April 30, 2011 by Abi

psychology
A worker who recently switched from day to swing shift has become less efficient and more irritable. He is also making more mistakes than he did on the day shift. The cause of this worker's problem is likely to be: a. sleep disorders due to change in shift b. excessive light ...
February 23, 2012 by Terry

science - need help
a strip of silver does not react with any of the solutions tested what must be true about silver the solutions are: lead acetate zince sulfate and copper sulfate
November 21, 2007 by sam

Chemistry! URGENT!
Calculate the solubility, in molL―1, of lead sulfate, PbSO4, in a 0.0185 M solution of sodium sulfate, Na2SO4 . Ksp (PbSO4) = 1.6 x 10―8 I get 8 x 10^-9...but that is not right! Thanks!
June 8, 2009 by Critical

Reading
I didnt read a book for reading and i need to do a clue map stating the clue and what suspect it lead to.. help! the book is Nancy Drew and the Mystery of the Glowing Eye.
February 21, 2011 by Sam

Accounting
Identify each statement as true or false. If false, indicate how to correct the statement. 1. Depreciation is a process of asset valuation, not cost allocation. 2. Depreciation provides for the proper matching of expenses with revenues. 3. The book value of a plant asset ...
April 2, 2012 by Casey

Chemistry
Which of the following does form a Group II cation? lead iron cobalt nickel How do you figure this one out? You must know what is in group II. Fe, Co, and Ni are in group III. Pb is in both group I and group II. Pb ppts as the chloride in group I and as the sulfide in group II.
February 20, 2007 by Chemistry

history-current events
what are some economic, social, political, and other problems in Cuba did historical events lead to these problems? and what was the influence of imperialism and globalization on Cuba? please help!!!!! thanks
November 8, 2010 by amy

Chemistry (balancing eq)
I need to write a formula where PbNa reacts with water. 2PbNa + 2 H20 = 2 NaOh + H2 +Pb It says in the question that lead doesn't react with water, but Na does. Did I write the formula correctly?
October 1, 2013 by Kristine

Physics
I only need help with part B. A 250W computer power supply is on 10 h per day. Part A If the cost of electricity is $0.15/kWh, what is the energy cost (to the nearest dollar) if this computer is used like this for a year (365 days)? 140 dollars Part B If this power supply is ...
February 19, 2014 by jen

Government
I have a paper to write. The topic is "Describe the ways that the government can effect the economy. Which is the way that provides the most impact on the economy? Why?" Can someone give me some references and resources to check under that deal with this topic? Thanks!
March 25, 2008 by Kasey

socials
how the hipc program be able to help poor developing countries goal be to reduce the debt load of higly indebted countries so their scarce resources be able to go towards poverty reduction programs rather than to debt servicing.
January 12, 2012 by Mohammad

Resources and references
Your composing a report. You realize using the word "option" over and over again. Which of the following references will help you find a different word with the some meaning? A: A spell Checkers B: A thesaurus C: AP style book D: Encyclopedia
June 26, 2013 by Sofiya

chemistry
find the specific heat of lead using 200 g of pb at o degrees celcius and placing it in 200 g of water at 60 degrees celcius
June 19, 2012 by Kathleen

Chemistry
Estimate the fraction of of unoccupied atomic sites in lead (Pb) at a temperature 10K below its melting point. DATA: Vacancy Fraction, nv/N T (degrees C) 1.8*10^-7 100 7.2*10^-6 200 Express your answer in terms of vacancy fraction, nv/N:
April 25, 2013 by Anonymous

chemistry
Estimate the fraction of of unoccupied atomic sites in lead (Pb) at a temperature 10K below its melting point. DATA: Vacancy Fraction, nv/N T (degrees C) 1.8*10-7 100 7.2*10-6 200 Express your answer in terms of vacancy fraction, nv/N:
April 27, 2013 by ssss

physics
Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a frequency of 500 Hz. What is the frequency heard by the driver of the lead car? (vsound = 340 m/s). I have the answer but I just don't know how to get it...
July 12, 2010 by Katie

physics
the plumbing in an old house uses lead pipes (which are now considered hazardous). Hot water is run through a section of pipe, increasing its temperature from 19.4 C to 36.8 C. if the pepe is intially 3.90m in length, what is the change in the length of the pipe?
August 18, 2011 by Anonymous

chemistry
pleast help me work this prob lead is a toxic meatal that affects the central nervous system. a Pb-contaminated water sample contains 0.0011% Pb by mass. What vilume of the water in milliliters contains 115g of Pb? (assume that the density of the solution is 1.0g/ml
November 5, 2011 by swtnblk

chemistry
pleast help me work this prob lead is a toxic meatal that affects the central nervous system. a Pb-contaminated water sample contains 0.0011% Pb by mass. What vilume of the water in milliliters contains 115g of Pb? (assume that the density of the solution is 1.0g/ml
November 6, 2011 by swtnblk

health
Use 10 medical words discussed in this week’s reading to create a script of dialogue between two medical professionals. Use complete sentences, I just dont know what i should put as im not a doctor and do not know what symptoms could lead to something else
November 27, 2011 by Ashley.

Biology
Discuss two lifestyle factors (one for bone and one for muscle) that affect the growth, development, size and/or healing (positively or negatively of the tissue. Also state whether the factor can lead to a disease or disorder of the tissue.
July 15, 2012 by Cathy

Chemistry
I am supposed to name this using IUPAC method for binary compounds (i think) arsenic(111) sulfide silicon tetraiodide antimony (111)bromide ammonia gas lead(11) and the things in the brackets are supposed to be the roman numerals
February 13, 2014 by Sam

Chemistry - Solubility Product
What did you observe after the addition of dilute HCl to the saturated lead chloride solution? Explain observations using relevant chemical reaction. I observed that a white precipitate was formed. Not sure how to explain why it formed
March 29, 2014 by PleaseHelp

Physics
You are working as a summer intern for the Illinois Department of Natural Resources (DNR) and are assigned to some initial work on water resources project. The department will be overseeing the construction of a dam to create a large fresh water lake that will be approximately...
May 1, 2010 by jesse

Microecomonics (need to see if i got these right
1. Microeconomics deals with: (Points: 3) the working of the entire economy or large sectors of it. economic growth. individual units in the economy. THIS ONE I PICKED all of the above. 2. The basic concern of economics is: (Points: 3) to keep business firms from losing money...
November 20, 2008 by Heidi

human resources
two aspects of a performance appraisal from the following list. What are the special challenges in each area and what would be the impacts on employees and employers if the challenges were not addressed? o Strategic Relevance o Criterion Deficiency o Criterion Contamination o ...
November 2, 2007 by tammy

english question
i think its A.?? What are some ways to avoid plagiarism? A.only using the main ideas and important details from the website B.By giving credit for others’ ideas, images, and information found in various resources C.Using quotation marks D.All of the above
May 20, 2014 by matt

physics
If the average household uses electrical energy daily at the rate of 500. W, how much U-235 must undergo fission to supply this need for a year? (assume 200. MeV of energy are generated per fission and that the power plant is 46% efficient). 1. Energy used in Joules per year? ...
March 16, 2010 by sasha

Economics
Who gets scarce resources in a market economy? A) the government B)whoever is willing and able to pay the price C)whoever wants them D)Whoever the government decides gets them
January 10, 2011 by Anonymous

physics
A copper calorimeter can with mass .100 kg contains .160 kg of water and .018 kg of ice in thermal equilibrium at atmospheric pressure. If .750 kg of lead at a temperature of 255 degrees Celsius is dropped into the can what is the final temperature of the system if no heat is ...
November 15, 2007 by Jen

physics
A copper calorimeter can with mass 0.202 kg contains 0.185 kg of water and 1.40×10^−2 kg of ice in thermal equilibrium at atmospheric pressure. If 0.900 kg of lead at a temperature of 417 degrees celsius is dropped into the can, what is the final temperature of the ...
December 5, 2009 by AE

Physics
A copper calorimeter can with mass .100 kg contains .160 kg of water and .018 kg of ice in thermal equilibrium at atmospheric pressure. If .750 kg of lead at a temperature of 255 degrees Celsius is dropped into the can what is the final temperature of the system if no heat is ...
October 18, 2010 by Katherine

science
How ionising radiation affect the cell, DNA and can lead to tumours /leukaemia? nothing too complex please note form will be fine, in which I can use it in my explanation. if you can please put it in your own words as I find it much easier to understand and explain in my ...
October 27, 2013 by Unknown

SCIENCE
How ionising radiation affect the cell, DNA and can lead to tumours /leukaemia? nothing too complex please note form will be fine, in which I can use it in my explanation. if you can please put it in your own words as I find it much easier to understand and explain in my ...
October 27, 2013 by Unknown

S.S
Which of the following minerals generates the most income for British Columbia? Copper<--- Zinc Lead Gold One reason many British Colombians feel a link to the countries of the Pacific Rim is because more than 15% have _____ ancestors. Hawaiian<--- Asian Australian French
March 3, 2014 by Help Please!!!

S.S
Which of the following minerals generates the most income for British Columbia? Copper<--- Zinc Lead Gold One reason many British Colombians feel a link to the countries of the Pacific Rim is because more than 15% have _____ ancestors. Hawaiian Asian<--- Australian French
March 3, 2014 by Help Please!!!

ap chem
I'm supposed to find the mass of NaCl in 1 L & the mass of H20 in 1 L. I'm given NaCl solution. 1% by mass. The Density is 1.071 g/mL. I know the answer for NaCl is 10.71 g, but I don't know where to start to get to this. Could you lead me in the right direction?
February 24, 2011 by dylan

language arts
indicate the Predicate Adjective & Participle of ea sentence: 1. Nearly 150 years later, a talented ballet dancer appeared in the same city. ANS: Part= talented, PA =same 2. Anna Pavlova's family was poor. ANS: PA = poor 3. Nevertheless, she joined into the famed Imperial ...
June 2, 2014 by need help

marketing
13) Which of the following would probably NOT be in a proposed marketing plan? A. A list of what company resources (costs) would be required. B. Expected sales and profit results. C. A description of the target market and marketing mix. D. A statement of how frequently the ...
April 26, 2010 by Anonymous

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
April 3, 2011 by Sasha

information literacy
In which part of the Career Center in the Penn Foster student library is there a link for the Occupational Outlook Handbook? A. General Resources B. International Job Services C. Employment Sources—General D. Employment Sources—Specialized My answer is a
January 15, 2012 by tasha

chem1 WORD PROBLEM!!
lead has an atomic number of 82;iron has an atomic number of 26; and copper has an atomic number of 29.how do the charges of the nuclei of these 3 elements compare?
October 12, 2012 by tyneisha

electrochemistry
Calculate the cell potential of voltaic cells that contain the following pairs of half-cells. a)A half-cell containing both HgCl2 and Hg2Cl2; lead in a solution of Pb2+ ions.
August 1, 2010 by sma

chemistry
Calculate the cell potential of voltaic cells that contain the following pairs of half-cells. a)A half-cell containing both HgCl2 and Hg2Cl2; lead in a solution of Pb2+ ions.
August 1, 2010 by sma

math
The Ministry of Finance published the FY2009 Tax Reform ( Main Points) on December 19, 2008. Included in the Reform is the introduction of a 2- year measure allowing immediate depreciation for investment in energy- saving facilities and appliances. If this measure doubles the ...
November 14, 2011 by Anonymous

math
The Ministry of Finance published the FY2009 Tax Reform ( Main Points) on December 19, 2008. Included in the Reform is the introduction of a 2- year measure allowing immediate depreciation for investment in energy- saving facilities and appliances. If this measure doubles the ...
November 17, 2011 by Anonymous

Chemistry
I keep reading that lead is a poor electrical conductor, but I would like to know the chemistry of why exactly it is a poor conductor.
February 20, 2010 by Sara

Chem
The mass of a cube of iron is 277 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
September 20, 2012 by Reg

SCIENCE
Help. Am I right or wrong. The use of a plant crop to harness the sun's energy for conversion to energy sources is termed ___________ Bioconversion? Check these sites for your answer. http://www.teachersdomain.org/resources/tdc02/sci/life/oate/energyflow/index.html http://www....
May 30, 2007 by Meg

chemistry
What are the acids and bases of the following salts? Na3PO4 PbS KIO3 Do you meant on dissociation? phosphoric acid, sodium hydroxide lead hydroxide, hydrogen sulfuric potasslim hydroxide, idoic acid. I am not certain of your question.
May 19, 2007 by Carter

com140
Suggest two tips for creating academic documents not mentioned in the resources. Which guidelines are most important for formatting? Which guidelines are less important to a business document but more important to an academic paper?
October 15, 2009 by keya

ABC
BusinessWeek, in an article dealing with management, wrote, “When he took over the furniture factory three years ago…[the manager] realized almost immediately that it was throwing away at least $100,000 a year worth of wood scrap. Within a few weeks, he set up a task force of ...
January 18, 2010 by xyz

human resources
melda is a careful decision maker who has a reputation for taking a long time to make decisions. She is very thorough in collecting information and evaluating more alternatives than other managers are. Imelda is probably __________ in her decision-making style. analytical ...
July 31, 2012 by Anonymous

chemistry
OKOK I know that I have posted this question but I just don't understand the last part. 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate at 25°C. Calculate the Pb2+ and IO3- concentrations when the mixture comes ...
May 16, 2007 by mel

biology holly leaf miner
can anyone please explain the term regulating mortality factor (regarding the holly leaf miner )and how understanding of this can lead to successful biological control of pests in agriculture and horticulture
April 3, 2007 by Bex

planning
In three to five sentences, answer the following questions. 1.Where do I picture myself five years from now? What am I doing? Where am I going? 2.How do the course choices (both elective and required) that I make today lead to the fulfilment of this dream? 1. Five years from ...
August 30, 2010 by Anonymous

HCS/325 Health care management
In the rolee of a health care manager, you are expected to respond to daily urgent and emergency situatuions as they arise by mobilizing your staff and available resources to attain specific objectives. How would you describe the finction of control involved here?
April 12, 2011 by Annia

Geography
Which statement is not a benefit of increased development? A)improved access to health care B)increased wealth C)more even distribution of resources D)reduced unemployment i think i might be (B) beacuse it is not benefit the increased development.
March 10, 2010 by nicky

coefficient
test using the lead coefficient to find out if y arrow oo, or y arrow-oo as x arrow -oo y=-5x^3+4x^2+6x-7 n is odd -5x^3 an<0 -5x^3 y arrow -oo as x arrow oo Is this right or do I need to go back and try again??????
April 3, 2008 by Gabe

DBQ Essay (plzz read!)
here is my DBQ essay so far BUT it's NOT done tho. Sectionalism – The Civil War From the 1820’s to the 1860’s the North and South had different thoughts over slavery. It expanded through different sections of America. The North and South started to develop new ways in ...
May 31, 2012 by Laruen

Management 330
Please can you help me put an Organizing Paper together: 1050 Word paper - Evaluate the function of management at Delta Airlines as it relates to Physical assets, Human resources and Knowledge. Please cite at least two references
March 10, 2008 by Maria

human resources
The R&D organization has decided it wants to promote total involvement and create a learning organization. The community-building meeting is the mechanism to move this forward. You have decided to bring in other consultants from the Working Better Group to help you plan this ...
May 11, 2012 by Fred

Psy 270
Where can I find the best resources to research this question besides the text book? Psychology has many applications in our lives, both professionally and personally. How might having a background in psychology help you in your professional life? How might it help you in your...
May 28, 2014 by Ron

English
Can somebody please help me write a summary news lead using the story below. The lead may be no longer than 20 words and must be written in the active voice A home at 2481 Santana Avenue was burglarized between the hours of 1 p.m. and 4 p.m. yesterday afternoon. The owner of ...
May 20, 2013 by Afranko

Medical office procedures
Describe three situations where the actions of a medical assistant were influenced by laws and regulations related to the release of personal and medical information of a patient. We are also to use resources available to you including your personal experiences to complete the...
January 23, 2008 by Jessica Blumberg

Global Studies
Which of the following minerals generates the most income for British Columbia? A. lead B. zinc c. Gold d. Copper <<< One reason many British Columbians feel a link to the countries of the Pacific Rim is because more than 15% have ____ancestors. a. Hawaiian <<&...
March 12, 2014 by vanessa

English
Writeacher, Thank you for your help!! I am trying to rewrite a cover letter, trying to reword so I can put some of the requirements for the job into my cover letter. One of the paragraphs reads - You will find me a loyal, personable, and dedicated individual, with the ability ...
August 8, 2008 by Ann

science question
If changing conditions lead to decreased oxygen levels in a stream, the carrying capacity of the stream for fish will decrease. Oxygen level in water is therefore a ______with respect to the number of trout that stream can support. Any idea?
March 18, 2014 by Ace1

Physics
A 46% efficient device uses chemical energy to generate 570J of electric energy. 1. How much chemical energy is used? 2. A second device uses twice as much energy to generate half as much electric energy. What is its efficiency?
December 4, 2012 by Anonymous

chemistry
ho do you calculate final temperature? anyone please help thanks that's a little vague. Are you dealing with ideal gases? If so you would use the formula PV=nRT P = pressure V = volume of container n = moles (grams/molar mass) R = gas constant (0.0821) T = temperature sorry ...
March 15, 2007 by shannon

College Physics
Which one of the following statements about a thermodynamic engine is not true, i.e., which one of the statements is false? 1)The internal energy is always the same at the beginning and at the end of one cycle. 2)The absorbed and the exhausted heat have the same magnitude. 3)...
November 22, 2010 by Tracy

Economics
Ross Perot added his memorable “insight” to the debate over the North American Free Trade Agreement (NAFTA) when he warned that passage of NAFTA would create a “giant sucking sound” as U. S. employers shipped jobs to Mexico, where wages are lower than wages in the United ...
November 5, 2011 by GG

anatomy
Tonsillitis, Hepatitis B, Reyes Syndrome, and chicken pox, Which one of these if left untreated can lead to heart disease and kidney failure Hepatitis B devistates the kidneys, and at the end, congestive heart failure is not uncommon.
May 19, 2007 by blondie

Economics
Determine whether each of the following would cause a shift in the aggregate demand curve, the aggregate supply curve, neither, or both. Which curve shifts, and in which direction? What happens to aggregate output and the price level in each case? a. The price level changes b...
September 6, 2006 by Jeffrey

Algebra
Solve by using the quadratic formula x^2=-7x+12 First, put all the terms on one side. x^2=-7x+12 x^2 + 7x -12 = 0 If the original sign for the 12 were negative, this would lead you to: x^2 + 7x + 12 = 0 This could factor into: (x+3)(x+4) = 0 However, as you have formula posted...
July 12, 2007 by PLEASE HELP

Planning
Hey, I have another question from my assignment. 2.How do the course choices (both elective and required) that I make today lead to the fulfilment of this dream? My dream is to become a dental hygienist or a family physician one day, and along with that to be cashier. Im ...
August 28, 2010 by Anonymous

science-biology
I'm pretty sure the answer is A, am I correct? Natural selection tends to A) increase the frequency of characteristics that enhance survival and reproduction. B) decrease the number of individuals in any given population. C) lead to an increase in genetic drift. D) decrease ...
December 7, 2011 by jon

6th grade science
1. earth has only a limited amount of land, yet land is a renewable resource, why? 2. trees are renewable resources, but some forests are not, why? 3. compare and contrast minerals and ores. 4. how could using ores contribute to an increase in air pollution?
January 13, 2009 by johnnetta

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