Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 340

**Physics**

A mass sitting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. 5.5 J of work is required to compressed the spring by 0.16 m. If the mass is released from rest with the spring compressed, it experiences a maximum accel...

**Physics**

A bungee jumper with mass 61.3 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 31.8 s. He finally comes to rest 25.3 m below the level of the bridge. Calculate the spring constant of the bungee co...

**physics**

1)A fire hose held near the ground shoots water at a speed of6.5 mps At what angle should the nozzle point in order that the water land 2.5 meters away? Answers: 18 degrees and 72 degrees 2) A long jumper leaves the ground at 45 degrees above the horizontal and lands 8 meters ...

**geometry**

ABCD is a rectangle. If AC=5x+2 and BD=x+22, find x.

**Science**

How many families are found in the Phylum Arthropoda?

**math/ algebra?**

a lab technician draws a sample of blood. A cubic millitmeter of the blood contains 22^3 white blood cells and 22^5 red blood cells. What is the ratio of white blood cells to red blood cells?

**physics**

a cannonball is fired straight up at 60m/s. how long does the flight last?

**Algebra 1 (HELP PLEASE!!)**

The United States Mint reported at the end of 2006 that the unit cost of producing and distributing a penny was 1.21 c. What percent of the value of a penny is this cost? What can you conclude about the cost of making pennies? • How can a model help you to visualize the p...

**PHYSICS**

A gas cylinder contains a mixture of carbon dioxide and oxygen, which have different molecular masses. The contents of the cylinder are in thermal equilibrium. Which of the following statements is correct? Question 1 options: A) All carbon dioxide molecules and all oxygen mole...

**PHYSICS**

The latent heat of fusion of water is 3.34 x 105 J/kg. A farmer places a barrel containing 1000 kg of water in his barn one winter's night. When the water cools to 0oC, it begin to freeze. How much heat does the water give out while it is freezing until it has all become i...

**Algebra**

I have to work out this equation for my college paper and I am having trouble understanding graphs, etc. The question is C=200+50 and C=300+25. Can anyone walk me through the steps on how to graph this?

**stats**

TABLE 1 The general manager of a chain of pharmaceutical stores reported the results of a regression analysis, designed to predict the annual sales for all the stores in the chain (Y) – measured in millions of dollars. One independent variable used to predict annual sale...

**Physics**

Helium is supplied in pressure tanks. If I have a 10 liter tank at 200 atmospheres of pressure, how many 3 liter balloons can I fill? (Assume the balloons are at one atmosphere)

**Biology**

The number of oyster beds in Chesapeake Bay,which is an arm of the Atlantic Ocean,is dwindling rapidly.what effect would this have on the surrounding area?On the human community?

**College Chem**

Calculate the enthalpy change for the reaction NO(g) + O(g) --> NO2(g) from the following data: NO(g) + O3(g) --> NO2(g) + O2(g) ; ∆H = -198.9 kJ O3(g) --> 1.5O2(g) ; ∆H = -142.3 kJ O2(g) --> 2O(g) ; ∆H = 495.0 kJ

**College Chem**

Calculate the enthalpy change for the reaction NO(g) + O(g) --> NO2(g) from the following data: NO(g) + O3(g) --> NO2(g) + O2(g) ; ∆H = -198.9 kJ O3(g) --> 1.5O2(g) ; ∆H = -142.3 kJ O2(g) --> 2O(g) ; ∆H = 495.0 kJ

**Biology project**

THE EVOLUTION OF BARBELLUS Describe the type of food that the diffrent Barbellus spieces might have eaten. 1.caterpillar 2 and 3.type of fish

**Social Studies**

Was Blitzkrieg a successfull war stratagy?

**physics**

Consider a single photon of red laser light, with wavelength of 633 nm (nano is 10-9). What energy does this carry? What momentum? How does the energy compare to typical atomic energies of a few times 10-19 J?

**Biology**

Cellular slime molds begin life as a group of seperate organisms,or individuals.After congregation,they become a single multicellular individual.Describe what is meant by this statement.

**biology**

specialized cells in animals are all descended from a single ancestor cell.How are the specialized and the nonspecialized cells of the cellular slime molds related?

**English**

the mirror is an example of magic in the movie;they use it to see where belle's father is in the forest;also the fact that at the end true love saves the beast from the trajic spell and transforms into the handsome prince.

**social studies**

evaluate the following statement:canada's autonomy advanced in the first three decades of the twentieth century

**social studies**

evaluate the following statement:canada's autonomy advanced in the first three decades of the twentieth century

**spanish**

La hija tiene hambre

**Chemistry**

when sulfur is burned in the presence of oxygen, sulfur trioxide is produced. if 3.4 x 10^24 atoms of sulfur react, how many liters of sulfur trioxide are produced?

**physics**

680 N. If it were more of less, the man would fall through the floor. Hope this helps!

**Algebra 2 **

If a bicycle has a crankshaft of 40 teeth, and there are three rear sprockets attached to the rear wheel, 20 teeth, 16 teeth and 12 teeth. The diameter of the rear wheel is 60 cm. Which sprocket should be used to get the most distance in one paddle? What would the distance be?

**Algebra**

If a bicycle has a crankshaft of 40 teeth, and there are three rear sprockets attached to the rear wheel, 20 teeth, 16 teeth and 12 teeth. The diameter of the rear wheel is 60 cm. Which sprocket should be used to get the most distance in one paddle? What would the distance be?

**calculus**

Find the derivate of the function f(x) = 2x2 + 23x + 5 What is the value of this derivative when x = 19

**calculus**

Find the derivate of the function f(x) = 2x2 + 23x + 5 What is the value of this derivative when x = 19

**business calculus**

For the function f(x) = 18/(3x-14) determine the x-coordinate of any vertical asymptote

**calculus**

For the function f(x) = 1/(6x2+5x+16) determine if there is a vertical asymptotes

**calculus**

For the function f(x) = 18/(3x-14) determine the x-coordinate of any vertical asymptote

**calculus**

A function f(x) is said to have a removable discontinuity at x=a if: 1. f is either not defined or not continuous at x=a. 2. f(a) could either be defined or redefined so that the new function IS continuous at x=a. Let f(x)= x2+10x+26 2 −x2−10x−24 if x−5...

**calculus**

Consider the function f(x)=4x3+2x2+5, and let c be a number in the interval [01]. For what values of k is there a c in this interval such that f(c)=k?

**calculus**

On the graph of f(x)=3sin(2x), points P and Q are at consecutive lowest and highest points with P occuring before Q. Find the slope of the line which passes through P and Q.

**calculus**

A mass is oscillating on the end of a spring. The distance, y, of the mass from its equilibrium point is given by the formula y=6zcos(10wt) where y is in centimeters, t is time in seconds, and z and w are positive constants. (a) What is the furthest distance of the mass from i...

**child day care**

was this right answer. thanks

**child day care**

1,c 2,c 3,b, 4,c 5,c 6,a 7,a 8,d 9,c 10,c 11,c 12,b 13,c 14,a 15,d 16,c 17,b 18,c 19,b 20,b

**Math**

Thanks math helper but I am more lost than before since my choices for an answer are 25pi m2, 166.67pi m2,33.3pi m2, 100pi m2 I don't know what I am missing here. I am sorry to bother you.

**Math**

Can someone please help me with my math homework problem? My mom tried but she doesn't understand it. What is the surface area of a right circular cylinder with base circle of radius of 5m and height of the cylinder 10m?

**Spanish**

si,lo puedo ver pero donde esta? i am a fluent speaker of spanish,italien,and portugeese i lived in central america

**AP Calculus AB**

1. assign x and y values to the length and width of each box within the pens, and use the formula 600=9x+8y to isolate the y value (i got the 8 and 9 by counting the number of length and width values existed in the diagram) you should get y=(600-9x)/8 2. then, since they asked...

**chemistry**

a mixture of methane and ethane is stored in a container at 294 mmHg. The gases are burned in air to form co2 and h2o. if the pressure of co2 is 357 mmhg measured at the same temperature and volume as the original mixture, calculate the mole fraction of the gases.

**business**

While waiting outside a meeting room, you notice that the next middle manager making a presentation is rehearsing what he will say. The pants zipper of his blue suit is open and part of his white shirt is protruding

**business**

You know that you have only $110 left before you hit the limit on your credit card, and you have $8 in your wallet. You are the host to three clients. One has just announced that he is considering the lobster dinner for $40. The other two clients nod their heads.

** business**

A colleague, an amateur pilot, shows up at a critical meeting with some Japanese executives wearing a tie adorned with pictures of a P51D Mustang escorting a B-29 Superfortress (the Mustang is a World War II fighter and the Superfortress is the type of plane that dropped the ...

**geometry**

It's always a square. 26/4= 6.5 :) There's your answer

**STOICHIOMETRY**

2Al + 3CuSO4 ! Al2(SO4)3 + 3Cu What is the maximum amount of Cu (63.5 g/mol) that could be produced by reacting 20.0 grams of Al (27.0 g/mol) with excess CuSO4?

**Philosophy**

Symbolize these arguments and display truth trees to evaluate the resulting argument forms for validity. If the argument form is invalid, describe (in English) the conditions under which the premises would be true but the conclusion false. 99.32 There will be scorpions in the ...

**Philosophy**

Prove informally, by employing correct definitions and principles of reasoning, that the following are true. 1/ Every formula implies itself. (That is, A implies A . Hint: For this one you will need to employ the definition of interpretation.) 2/ If set S implies formula A , t...

**Philosophy**

Construct natural deduction proofs for each of the following. 118.2 p&(q&r).'. q 118.4 .'. ¬(p&(q&¬p)) 118.10 q .'. ¬(¬p&¬q) 122.3* p " q, ¬p " r .'.¬q " r 122.7* p " q, ¬(p " r) .'. ¬(q " r)...

**ital**

venti,ventuno,ventidueventitre,ventiquattro, venticinque, ventisei ventisette ventotto ventinove trenta I KNOW HOW TO SPEAK ITALIEN IF ANY MORE QUESTIONS FEEL FREE TO ASK

**Physics**

When will an object be in equilirium if different forces are acting on the object from the different systems? Would it be appropriate to use F=ma to find the equilibrium?

**College Chemistry**

what is the maximum weight of CuCl that can be prepared from the reaction sequence using 1.0g of Cu turnings to prepare the Cu2+ solution?

**College Chemistry**

how many grams of metallic copper are required to react with the number of moles of Cu2+ , 0.16mol, to form CuCl overall reaction can be taken as: Cu2+(aq) + 2 Cl- (aq) + Cu(s)-->2CuCl(s)

**College Chemistry**

The Cu2+ ions in this experiment are produced by the reaction of 1.0 g copper turnings with excess nitric acid. How many moles of Cu2+ are produced?

**Geographyand socity**

Owh wow....so 'Anonymous' what were you doing here if you weren't looking for answers???? Pshh your no better than us!

**Geographyand socity**

Owh wow....so 'Anonymous' what were you doing here if you weren't looking for answers???? Pshh your no better than us!

**Physics**

Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and ç is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical pollution particle ...

**college**

Physical science

**college**

A car accelerates at a rate of 0.6 m/s2. How long does it take for this car to go from a speed of 55 mi/h to 60 mi/h?

**college**

A car accelerates at a rate of 0.6 m/s2. How long does it take for this car to from a speed of 55 mi/h to 60 mi/h?

**English**

But this is what authentic means? based on fact (cultural accuracy) reproducing essential features of an original (cultural accuracy) true to the creator's own cultural personality, spirit, or character (cultural immersion)

**English**

Is the book new shoes for sylvia authentic if so why?

**Ethics**

What evidence do you see of an ethical breakdown in Canadian society affecting all sectors (e.g., business, education, and government)?

**algebra **

sqrt(36/81)=(sqrt36)/(sqrt81) =6/9 (6^2=36, 9^2=81) =2/3 (take out the common factor 3 from both the denominator and the numerator)

**GR.12 DATA MANAGEMENT**

I GOT IT!!!!!!! [10!/(2!2!) - (9!/2!2!)]+[(2)(10!/2!2!2!) - [(2)(9!/2!2!2!)]=1632960

**GR.12 DATA MANAGEMENT**

How many ways are there to arrange the word: MATHEMATICS, if the last letter can not be "H", and the first letter must be a vowel?

**algebra**

3m+2p=1.8 (qeuation A) 4m+6p=2.9 (equation B) "equation A" times "3": 9m+6p=5.4 (equation A') "equation A'" - "equation B": 5m=2.5 [m=0.5] substitude "m=0.5" into "equation A": 3(0.5)+2p=1.8 1.5+2p=1.8 2p=0.3 ...

**business**

You work as the manager of the second largest bank in your region of the United States. The bank's top management team has asked you to present an overview of how the current economy and financial changes have impacted your business and what changes must be made as a resu...

**algebra**

how do you Simplify (d^3)(d^4)^5?

**algebra**

how do you solve this equation 3x2 + 6x + 3 = 0 ? what does x equal? and how do you factor this? 4ab + 2a + 6b + 3 Thank you SOO much for the help!

**English**

why dont you say: sitting and standing properly are crucial factors to maintaining a healthy back.

**chemistry**

A solution is made by adding 5.0 g Na2CO3 * 10H2O to enough water to make a 500 mL solution. what is the molarity. I have: M=mol solute/liter solution = (5/286)/.5 = .035M 286 is what i got for the molar mass of Na2CO3 * 10H2O Is that correct?? I think it is, but the next prob...

**CHEMISTRY--URGENT**

oh, sorry! its 2 liters HNO3 and the answer is 11.65 so it would be: -log [(20 - 2e-8) / 4000] = 2.3 = [OH] 14 - 2.3 = 11.65 (without the rounding of the 2.3) why, though, would you subtract it from the other?

**CHEMISTRY--URGENT**

oh, sorry! its 2 liters HNO3 and the answer is 11.65 so it would be: -log [(20 - 2e-8) / 4000] = 2.3 = [OH] 14 - 2.3 = 11.65 (without the rounding of the 2.3) why, though, would you subtract it from the other?

**CHEMISTRY--URGENT**

HNO3 with pH 3 is mixed with 2 L KOH with pH 12. assuming volumes are additive what is the pH of the final solution? I have absolutely no idea how to do this. I do know the answer, though. I have a test tomorrow and I would really appreciate it if someone could help!!!!

**9th Grade Social Studies**

Had the world gone along with Wilson’s plan to remove economic barriers between nations, what kind of place would the world be? Would it be better? Worse? How would you answer this question?

**CHEMISTRY--PLEASE HELP, URGENT**

A saturated solution of CaSO4(aq) is made in a beaker until there is excess calcium sulfate resting at the bottom. Then solid potassium sulfate is added. Which of the following is true? (The Ksp for potassium sulfate is larger than the Ksp for calcium sulfate) a. More calcium ...

**CHEMISTRY--PLEASE HELP, URGENT**

What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve in 500. mL of 0.01 M aqueous silver nitrate?

**chemistry--URGENT, PLEASE HELP**

What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated solution in water? *For this one the formula is Ag2CrO4, which is [Ag]^2[CrO4]. I plugged x in for CrO4, so x^3 is equal to Ksp. I then got that x = 2.0e-4. However, that x is for CrO4,...

**Chemistry (urgent)**

thank you so much!! I got a 100 on the test I was studying for!

**Chemistry (urgent)**

Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated so...

**math-DUE TONIGHT PLEASE HELP**

The way to find the mean is by adding up all the different values and then dividing by the total number. If there are five numbers you can set up an algebraic equation like: x/5 = 61.8 then you can set up a new equation to solve for the height without the absent student: h/4 =...

**Chemistry**

Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated so...

**biology**

Thank you!

**biology**

Which of the following statements about sexual and asexual reproduction is FALSE? a. Genetic diversity occurs in sexual reproduction. b. Asexually reproducing organisms can repair their own DNA. c. There are no special reproductive cells in asexual reproduction. d. A gametoph...

**biology**

Thank you!

**biology**

When Darwin published his theory of evolution, he included all of the following ideas EXCEPT the idea that a. species changed slowly over time. b. some organisms become less suited to their environment then others. c. evolution occurs in spurts after major environmental chang...

**geography**

Thank You!

**geography**

The factor that is forcing many South Asians to move to cities is a. religious conflict in rural areas. b. the threat of landslides in coastal areas. c. lack of arable land due to a growing population. d. dry conditions in the Indo-Gangetic Plain C?

**science**

Screw you SraMcGin, ciara asked for an answer not for another useless search engine that turns up useless websites

**language arts**

did i punctuate this sentence correctly? "They wanted to have the woman give birth to healthy babies, but they wanted to get as much work out of the woman as possible; therefore, the women were given lighter tasks."

**math**

int 1/ (sq rt (4sec^2 x +4)) dx trigonometric substitution expression: sq rt (x^2-a^2) substitution: x=a sec x identity: sec^2 x -1=tan^2 x

**math**

what is a like fraction? greatest common factor? unlike fractions?

**Language Arts**

I have an essay due tomorrow and it is required to have at least one adverb clause. I'm still a little confused about how to create an adverb clause. Help pleasee?!

**math**

what did the witty raindrop exclaim to all the others

**Organic chemistry**

its semi soluble.... it only dissolves if heated

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