Tuesday

June 30, 2015

June 30, 2015

Number of results: 12,211

**Science**

How would the solstices and equinoxes change if the earth's orbit were circular instead of elliptical? explain how a circular orbit would effect seasonal changes. can someone help? please
*September 20, 2009 by Ryan*

**science **

okay i have a question which is on a key assesed piece explain the physical and chemical changes when a candle burns using the big idea of energy? what is the big idea of energy?
*February 23, 2010 by minka*

**Science Please I NEED Help!!!!!!!!!!!!!!!!!!!!!!!!**

Describe how the instantaneous speed of a car changes when the car is moving with constant speed , speeding up, and slowing down please answer as soon as possible
*March 28, 2010 by dina*

**Oceanography**

A 15.75-g piece of unknown metal absorbs 60 cal of heat energy, and its temperature changes form 25 degrees C to 175 degrees C. Calculate the specific heat capacity of this metal.
*September 28, 2011 by bj*

**CHEMISTRY**

NEED HELP (Combined gas Law) A gas at a pressure of 1.50 atm has a volume of 200 mL. Calculate the new volume if the pressue changes to 1.20 atm. Assume constant temperature.
*March 19, 2013 by JOY*

**math**

The area A equals = πr^2 of a circular oil spill changes with the radius. At what rate does the area change with respect to the radius when r equals= 3ft? This is 9pie right? not 6pie?
*March 9, 2015 by John*

**Science**

In the United States, we are fortunate to have an abundant supply of food, and much of this is due to our agricultural technology. However, there are many concerns about our food source, including genetically modified crops, the use of more chemicals, and climate change just ...
*July 14, 2011 by Libra*

**science**

In the United States, we are fortunate to have an abundant supply of food, and much of this is due to our agricultural technology. However, there are many concerns about our food source, including genetically modified crops, the use of more chemicals, and climate change just ...
*November 1, 2011 by Lisa*

**Statistics**

What are the values of the mean and standard deviation of a normal standard deviation
*June 14, 2010 by Jacob*

**discrete data**

Can discrete data be analyzed using a normal distribution?
*June 2, 2011 by Anonymous*

**Chemistry**

Glycerol is a nonvolatile water soluble material. It's density is 1.25g/ml. Predict the vapor pressure of a solution of 2.40E2 ml of glycerol, in 385ml of water, at the normal boiling pt of water.
*April 7, 2013 by Jonah*

**physics **

Mary is standing at a place such that she makes an angle of 42° to the right of the normal of a mirror. Where should Mary's mom stand so that she can best see Mary's reflection in the mirror?
*April 9, 2014 by Billy*

**statistics**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 170 and a variance of 4. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
*August 25, 2011 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 4. The material is considered defective if the breaking strength is less than 161 pounds. What is the probability that a single, randomly selected piece ...
*March 9, 2012 by Anonymous*

**MATH**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 9. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
*June 3, 2012 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 172 and a variance of 4. The material is considered defective if the breaking strength is less than 168 pounds. What is the probability that a single, randomly selected piece ...
*August 27, 2012 by dawn*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 173 and a variance of 9. The material is considered defective if the breaking strength is less than 167 pounds. What is the probability that a single, randomly selected piece ...
*December 21, 2012 by Anonymous*

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 145 and a variance of 25. The material is considered defective if the breaking strength is less than 134.5 pounds. What is the probability that a single, randomly selected ...
*March 17, 2013 by buffy*

**Algebra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 195 and a variance of 4. The material is considered defective if the breaking strength is less than 190.2 pounds. What is the probability that a single, randomly selected piece...
*March 6, 2014 by Walden University*

**statistics**

the breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 125 and a variance of 25. The material is considered defective if the breaking strength is less than 113 pounds. What is the probability that a single, randomly selected piece ...
*June 3, 2014 by Anonymous*

**statistics**

the breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 125 and a variance of 25. The material is considered defective if the breaking strength is less than 113 pounds. What is the probability that a single, randomly selected piece ...
*June 3, 2014 by leelee kay *

**math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 9. The material is considered defective if the breaking strength is less than 157.8 pounds. What is the probability that a single, randomly selected piece...
*December 9, 2014 by libby*

**Math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 125 and a variance of 25. The material is considered defective if the breaking strength is less than 113.5 pounds. What is the probability that a single, randomly selected ...
*March 1, 2015 by Denise*

**Economics- please check**

Please check to see if my answers are correct. Complete each sentence by choosing the correct answer from the list of terms below. You will not use all of the terms. *normal good *complements *income effect *demand curve *ineleastic *inferior good *law of demand *unitary ...
*October 14, 2007 by Anonymous*

**Environmental Science**

Explain the four factors that produce changes in population size. Which factors are affecting the population size in the video?
*September 26, 2008 by Anonymous*

**chemistry**

A reaction occurs where the concentration of reactant A changes from 0.74 moles/liter to 0.63 moles/liter in 20 seconds. what is the average rate of reaction?
*November 17, 2011 by Maddie*

**Math**

From the part of vessel travels 100NM due easy and changes its course 45degrees N of E and the travels on a distance of 50 NM.what is the distance of a vessel from port
*March 5, 2013 by Erl floyld*

**Science**

Overpopulating rabbits in Australia were finally controlled by a disease spread trough the population. A higher death rate was recorded in regions with large population than small population. The disease can be considered.... A. A density-dependent factor. B. A density-...
*December 5, 2009 by Kaled*

**9th grade SCIENCE**

I have to list 5 different organic compounds; list different types for each; name; structure; properties; and uses. I am a bit confused as to what an organic compound actually is. I know it must contain a carbon, but would vegetables or household foods be considered organic ...
*February 26, 2010 by 6739*

**c programming**

Write a program that uses a 20x20 board, initialised to a given pattern, to play the game Conway's life . After each turn print out the board pattern using a . for a dead square and a * for a live square. Squares off the board are considered permanently dead.
*May 8, 2012 by Ravinder Kaur*

**psychology**

For each of three developmental domains: physical, cognitive, and social/personality, identify two major changes or challenges associated with that developmental stage (adolescence, young adulthood, middle adulthood, and late adulthood).
*October 1, 2008 by Anonymous*

**psychology**

three developmental domains: physical, cognitive, and social/personality, identify two major changes or challenges associated with that developmental stage (adolescence, young adulthood, middle adulthood, and late adulthood).
*March 24, 2009 by Anonymous*

**English**

The Crucible 1. Compare the roles that elizabeth proctor and abigail williams play in the crucible? 2. What kind of government does salem have? What role does it play in the action? 3. Discuss the changes that reverend hale undergoes in the course of the play.
*June 5, 2010 by Mary*

**genetics**

Which of the following does not occur during the PCR reactions? A.Changes in the reaction temperature by a thermocycler B.Denaturation at high temperatures C.Synthesis of oligonucleotide primers D.Extension of primers by DNA polymerase E.Annealing of oligonucleotide primers
*March 22, 2015 by Lucy*

**chemistry**

Which way will the equilibrium shift when subjected to the following changes? 2NOBr + heat <-> 2NO +Br2? NO is addded temp. doubled Br2 removed Pressure increased I said: reverse, forward, forward, forward
*April 27, 2015 by Clare*

**Technology**

I need help with these two questions: 1. Sheet metal and copper piping are examples of a. natural resources b. industrial products c. consumer products d. standard materials I think it's either B or D 2. Which of the following would be considered part of a primary processing ...
*December 31, 2009 by y912f*

**FIXED Essay. Please proofread.**

I went back made the suggest changes. I will go back and add more specfic examples of traditions before I turn my final paper in. I need this asap (before Sunday) Thanxs for your help! Who Is An American?
*September 15, 2006 by Soly*

**Math**

2asqrt9a^3b - 3bsqrt20a^2b + 2a^2sqrt16ab Help?! 2,965,368 round this to the nearest hundred thousand. any suggestions? the hundred thousanth place is the 6 in the thousanths place. the number before that is 5. so 6 changes to 7 and the rest zero. like this 2,970,000. i hink ...
*August 21, 2007 by Sarah*

**ACCOUNTI NG**

State how you would expect the following events to affect each type of lag: a. The company imposes a service charge on late payments. b. A recession causes customers to be short of cash. c. The company changes its terms from net 10 to net 20.
*February 21, 2008 by James*

**Physics**

(A) Identify how the gravitational potential energy changes as a shuttle takes off from the launch pad. (b) Explain the consequences to the space craft and its occupants if the shuttle is undergoing re-entry, and the angle of re-entry is significantly greater (steeper) than ...
*August 31, 2009 by Alfred*

**Chemistry **

C2H5OH + O2 -> C2H4O2 +H20 This reaction drastically changes the taste of wine, if 100.0 mL of wine initially contained 12.0 g of ethanol and after a period of time 4.00 g of acetic acid were detected, what percent of the ethanol had been converted?
*June 7, 2011 by Vinny*

**physics**

a jogger runs with a veloicty of 6km/h (25 degrees N of W) for 35 min and then changes direction, Jogging for 20 min at 4.5km/h (65 degrees E of N). Using the parallelogram method for vector addition, determine the joggers total displacement and his average velocity for his ...
*October 11, 2011 by neil*

**social studies**

When do the laws of supply and demand have less effect on prices? a) when a good or service is new b)when outside factors cause changes (my choice) c) when buyers dislike the prices that sellers change d) when sellers want to make more money
*September 17, 2013 by Anonymous*

**child development part 1**

whichpoint of view concerning growth and development does the definition describe.behavior changes as a result of observing people in various situations a.behaviorism b.social learning theory c.humanism d.psychoanalytic theory my answer is b
*January 27, 2015 by susue*

**AP Statistics **

Nurse practitioners are nurses with advanced qualifications who often act much like primary care physicians. Medical researchers wnat to design a study to compare the effectiveness of nurse practitioners and physicians. They recruit 1200 volunteer subjects for the tudy, each ...
*December 16, 2011 by Becky*

**science**

Exercise 2. Starting with a hypothetical population of 14,000 people and an even age distribution (1,000 in each age group from 1-5 to 66-70 years), assume that the population initially has a total fertility rate of 2.0 and an average life span of 70 years. Using the ...
*March 27, 2010 by sarah*

**Physical Science**

Hello, Can some one please tell me if I have the correct answer? Thank You my answer: B When an electron is displaced in a semiconductor, the hole that's left behind is? A. attracted to the negative terminal of the voltage source B. incapable of carrying a charge C. attracted ...
*March 24, 2008 by Mandi*

**Marketing**

T/F Malibu Beach Parties finds that the tastes and preferences of its customers change more rapidly than in the past. The manager is constantly looking for external ideas from customers, suppliers, competition, and the sales force I think this answer is false becuase sales ...
*March 29, 2008 by Jackie*

**Chamistry**

I am currently doing a lab write up and i have a little problem with some ionic equations the question goes as follows: You are provided with aqueous solutions of CaCl2, AlCl3, ZnCl2, CuCl2, FeCl2 and FeCl3 in six separate test tubes. To each of the solutions add 2-3 drops of ...
*October 29, 2008 by Marysia*

**Chemistry**

I am currently doing a lab write up and i have a little problem with some ionic equations the question goes as follows: You are provided with aqueous solutions of CaCl2, AlCl3, ZnCl2, CuCl2, FeCl2 and FeCl3 in six separate test tubes. To each of the solutions add 2-3 drops of ...
*October 29, 2008 by Marysia*

**business**

What are some of the best practices or etiquette that should be followed when writing business e-mails. How is the Web affecting the way business is conducted? Are there changes in business practices that apply to a virtual company?
*June 7, 2010 by rose*

**calculas**

x and y are both variables that are differentiable with respect to t, but not to each other. however, there is a relationship between them: x^2=3y^2+7. we also know that x changes with respect to t at a steady rate of square root of 12 (dx/dt=x'= square root 12). when x is 4 ...
*December 7, 2010 by Anonymous*

**Chem**

The molecules water (H2O) and methane (CH4) have similar masses, but methane changes from a gas to a liquid at -161°C. Water becomes a gas at 100°C. What could account for the differences?
*March 5, 2011 by Anonymous*

**U.S history**

Choose two changes that came about from the Civil war and for EACH ONE CHOSEN Explain how the Civil War brought about the change and Evaluate its effect on American Society
*December 6, 2011 by Jamas*

**English**

Be careful not to overdue the hot spices! What changes should be made? change overdue to overdo insert comma after hot change exclamtion point to a question mark?
*March 1, 2013 by jared*

**u.s. history**

i need a good thesis statement for a history paper i have to write. the topic is changes that took place in the U.S. from 1776-1870 im not good at thinking up thesis statements please help
*September 9, 2013 by john*

**History**

In suburban areas, the earliest cities were located on waterfronts. How might new changes in transportation affect the location of the cities. I know new transportation meaning automobiles, streetcar lines, etc.
*August 28, 2014 by Mel*

**eco205**

I am to do research on an industry and answer the question is price elasticity of demand considered elastic or inelastic? Are there substitutes available? Is the good a luxury or a necessity? Explain. o What is the price elasticity of supply for your chosen industry? Explain. ...
*May 14, 2008 by Guest*

**standard deviations**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 9. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece ...
*December 4, 2011 by Anonymous*

**Statistics/I am confused**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 115 and a variance of 25. The material is considered defective if the breaking strength is less than 105 pounds. What is the probability that a single, randomly selected piece ...
*May 31, 2014 by Mary Ann *

**Ms. Sue PLZ HELP!!!(science)**

Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this? a. The antibiotic mutated the bacteria, which allowed resistance to develop. b...
*May 12, 2015 by Anonymous*

**statistics**

the life of electric bulbs has a normal distribution with a mean of 35 months and a standard deviation of 4 months. What should the warranty period be if the company that manufactures these bulbs does not want to replace more than 2% of the bulbs?
*December 19, 2011 by HELPME*

**statistics**

All deal with a random variable X that follows a normal probability distribution with mean equal to 37 and a standard deviation of 5. Compute P(X < 39) Compute P(X < 29 or X > 41) Compute P(X > 30) Find the 42nd percentile for this distribution.
*April 25, 2013 by luke*

**statistics**

All deal with a random variable X that follows a normal probability distribution with mean equal to 37 and a standard deviation of 5. Compute P(X < 39) Compute P(X < 29 or X > 41) Compute P(X > 30) Find the 42nd percentile for this distribution.
*April 25, 2013 by luke*

**physics**

You lay a board over two wooden pegs. The board has a length of 5m and weighs 25 N. it overhangs the left peg by 1m and the right by 2m. Determine the normal force that each peg exerts on the board.
*May 2, 2014 by Michelle*

**Physics**

A car is traveling up a hill that is inclined at an angle θ above the horizontal. Determine the ratio of the magnitude of the normal force to the weight of the car when (a) θ = 18o and (b) θ = 30o.
*October 23, 2014 by Tami*

**statics**

Walleye is a common game fish. Adult walleye have a length with a mean of 44 cm and a standard deviation of 4 cm and the distribution of lengths is approximately Normal. What fraction of walleye are longer than 52 cm in length?
*June 22, 2015 by angel*

**maths --plse help me..**

20% of boys in an exmaination were not appeared,70% of appeared boys passed the examination.What percentage of total registered boys for the exmaination were failed.If absent boys are considered as failed
*December 20, 2012 by Anonymous*

**science**

In the United States we are fortunate to have an abundant supply of food, and much of this is due to our agricultural technology. However, there are many concerns about our food source including genetically modified crops, the use of more chemicals, and climate change just ...
*June 29, 2011 by tamika*

**Pre-Calculus-Trig**

A lighthouse keeper 100 feet above the water sees a boat sailing in a straight line directly toward her. As watches, the angle of depression to the boat changes from 25 degrees to 40. How far has the boat traveled during this time?
*January 30, 2011 by Chloe Mack*

**Intermediate Accounting **

A company changes from straight-line to an accelerated method of calculating depreciation, which will be similar to the method used for tax purposes. The entry to record this change should include a debit to retained earnings i nthe amount of the difference on prior years?
*February 7, 2010 by Jeniffer*

**Chemistry**

Enthalpy changes: H2O2(l) ----> H2O(l) + 1/2P2(g) delta H= -94.6kJ H2(g) + 1/2O2(g)----> H2O2 delta H= -286.0kJ Calculate the value on delta H for the reaction: H2(g) + H2O2(l)----> 2H2O(l)
*May 19, 2012 by Megan*

**Biology**

Haemophilia is a sex-linked recessive trait. A son born to phenotypically normal parents has Klinefelter syndrome and hemophilia. In which meiotic division of which parent is non-disjunction of the X chromosome most likely to have occurred? Explain with diagrams and state your...
*May 7, 2009 by Jason*

**geometry**

100.0 g of copper(II) carbonate (molar mass = 123.56 g/mol) was heated until it decomposed completely. The gas was collected and cooled to room temperature and normal pressure (25¨¬C and 1.00 atm). What volume of carbon dioxide was produced? The reaction is: CuCO3(s) ¡æ CuO(s...
*December 8, 2010 by sassy*

**physics**

A 5.4 kg wagon is pulled along a horizontal surface. The acceleration of the object is 0.9 m/s^2. What is the coefficient of friction between the surfaces? Any help is much appreciated! I am not sure how to go about the problem other than I think I must use the Fn (normal ...
*December 29, 2010 by Jenni*

**Biology**

1. In an experiment, a man drank a litre of water, his urine output increases so that after hours he had eliminated the extra water. When he drank a litre of 0.9% of sodium chloride (common salt), there was little or no increase in his urine production. Explain the difference ...
*March 22, 2007 by Uduak*

**Writing**

Which one of the following sentences or phrases is most likely to be considered a cliché? A. When in doubt, pout. B. Are you a man or a moose? C. Look before you leap. D. How dead is a dead doornail? A? When using direct quotations in your writing, which of the following ...
*September 5, 2012 by Sara Beth*

**LAW**

3. There is a/an ______________ exception to Miranda warnings if a threat exists to third parties. A. exigent circumstances B. public safety C. emergency D. impracticality im confused between A and B 4. When identification procedures violate constitutional provisions, the ...
*December 30, 2013 by Amy*

**English**

Can you check the grammar in the following sentences, please? 1)In order to reach the branch Lockwood pushed his hand through the window , but an ice-cold hand grabbed his fingers. In vain he tried to release himself from its tenacious grisp, which was maddening him. 2)...
*March 4, 2010 by Franco*

**chemistry**

Benzene has a heat of vaporization of 30.72kJ/mol and a normal boiling point of 80.1 degrees C. At what temperature does benzene boil when the external pressure is 405 torr? how do i go about answering this question? i don't know where to start. am i supposed to use the ...
*February 7, 2010 by Karen*

**Chemistry**

1) Given the following “substances” and their normal boiling points, in celsius. G:43.8 Celsius J:93.7 M:56.7 T: 83.5 R:63.6 Which set below correctly lists some of these liquids in order of increasing intermolecular forces at 20 oC? a) G < R < J b) J < T < R c) R...
*January 29, 2012 by Hannah*

**physics**

The plane is traveling at 288 m/s on a vertical circle of radius 622 m. Determine the ratio of the normal force to the magnitude of the pilot's weight. For comparison, note that black-out can occur for ratios as small as 2 if the pilot is not wearing an anti-G suit.
*March 4, 2014 by Anonymous*

**science**

1. Descriptive statistics are widely used in qualitative research. When establishing if a population is normally distributed explain when the statistics of sample size, mean, mode, median, skewness and kurtosis will guide the researcher to make conclusions of a normal ...
*May 30, 2015 by jonathan*

**intro to psychology**

A researcher is studying people of normal weight and obese individuals. She wants to know how the time of day affects hunger feelings in these two groups. When, during the experiment, the researcher looks at her watch, she has introduced a/an __________ into the research study.
*June 19, 2015 by elly*

**economics**

# Choose a product you have purchased in the past month from a grocery or home improvement store. # Describe how each of the 4 factors contributed to the elasticity of the good. # Is the product considered elastic, inelastic, or unitary elastic? # In a few sentences, what ...
*September 5, 2010 by Anonymous*

**computer programming**

Write a program that uses a 20x20 board, initialised to a given pattern, to play the game Conway's life . After each turn print out the board pattern using a . for a dead square and a * for a live square. Squares off the board are considered permanently dead.
*May 7, 2012 by Ravinder Kaur*

**computer programming**

Write a program that uses a 20x20 board, initialised to a given pattern, to play the game Conway's life . After each turn print out the board pattern using a . for a dead square and a * for a live square. Squares off the board are considered permanently dead.
*May 7, 2012 by Ravinder Kaur*

**Grammar**

Which of the following is correct in regard to the use of formal English? A. In formal English, we use words to say precisely what we mean. B. Contractions are considered acceptable in any document. C. Formal English is used more frequently in speaking than in writing. D. In ...
*May 9, 2013 by Samara*

**algebra**

how do I convert 9/16 into a percent? Is this done differently in a algebric form? Divide 16 into 9.000, using the normal procedures of long division. This should give you 0.5625; then multiply the decimal by 100. This isn't algebra, by the way.
*April 27, 2007 by help me understand*

**computer software**

I am trying to download Adobe reader 8.1.2 to my computer I have "dial up " service it seemes like it's been downloading forever and the bar is not moving to far it has been at 10% for a long time is this normal ? Thanks in advance for your help :>
*March 18, 2008 by Samatha*

**Statistics**

The lifetime of a 2-volt non-rechargeable battery in contant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than ?
*September 2, 2009 by Karen*

**Statistics**

The lifetime of a 2-volt non-rechargeable battery in contant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than ?
*September 2, 2009 by Karen*

**chemistry**

Under an O2 pressure of 1.00 atm, 28.31 mL of O2 dissolves in 1.00 L H2O at 25 degrees. Determine the molarity of O2 in an aqueous solution at equilibrium with air at normal atmospheric pressure. The volume percent of O2 in air is 20.80 \%. (Have no idea how to go through with...
*February 20, 2010 by david*

**chemistry**

Under an O2 pressure of 1.00 atm, 28.31 mL of O2 dissolves in 1.00 L H2O at 25 degrees. Determine the molarity of O2 in an aqueous solution at equilibrium with air at normal atmospheric pressure. The volume percent of O2 in air is 20.80 \%. (Have no idea how to go through with...
*February 20, 2010 by david*

**statistics**

Assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,225 per hour and a standard deviation of $220. What is the operating cost for the lowest 5 percent of the airplanes?
*November 21, 2010 by Barbara*

**statistics**

the average starting salary is Rs 15000per month with a standard deviation of Rs.1000 assuming normal distribution,what is the probability that starting salary will be more than Rs.17000, out of 200 degree holders how many will getRs.14000?
*August 7, 2011 by Anonymous*

**General Chem lab**

Hi, how do I calculate how many grams of unknown diprotic acid are needed to make 150mL of 0.750N (normal) solution? and to make 125mL of 0.500M (molar) solution? we have 0.5000M of NaOH.. Please help me...
*October 30, 2011 by Ashley*

**statistics**

The lifetime of a 2-volt non-rechargeable battery in constant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than
*May 31, 2013 by Anonymous*

**solid mechanics**

a steel bar 10m long and 10cm*10cm in section .it is subjected to an axial pull of 250KN .determine the intensities of normal and tangential stresses on a plane section at 60 degree to the longitudinal axis .
*July 25, 2013 by sushil*

**statistics**

The true highway mileage, Y, of a specific brand of hybrid vehicle has a normal distribution with a mean of 42 and a standard deviation of 1.5. Find the probability that a randomly selected hybrid vehicle gets more than 38 miles to the gallon.
*June 17, 2014 by lisa*