Questions Asked on
October 3, 2010

chemistry
what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)
asked by Jazz 
chemistry
what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)
asked by Jazz 
Chemistry
What happens when magnesium is added to Maleic and Fumaric acid? What gas is released from this reaction? I was also wondering if their are any differences between how each acid reacts with the magnesium because one is cis and the other trans. What happens
asked by Sean 
Calculus
find the derivative of f(x)=((x^2+3)^5+x)^2 using the chain rule. I know that I would start with f'(x)=2((x^2+3)^5+x) but I don't know how to do the rest
asked by Anna 
chemistry
Calculate the volume of 1.80 M \rm Na_3PO_4 in milliliters that contains 6.00 g of solute.
asked by Jeff 
Chem
You are titrating an unknown weak acid you hope to identify. Your titrant is a 0.0935 mol/L NaOH solution, and the titration requires 22.3 mL to reach the equivalence point. How many moles of acid were in your sample?
asked by Kim 
Social Studies
The passage implies that Plessey vs. Ferguson. 1. called for intergration. 2. stated that separtated facilities wer unequal. 3. was based on out bounded psychology. 4. was constitutional 5. applied only to private schools.
asked by Arlena1998 
English composition
Music during slavery: A call to arms or a panacea?
asked by lisa 
7th grade
an algebraic expression for p+3 and show me how to do it
asked by angel 03 
Human Services, I have partial ans.
Identify and describe two types of traditional approaches to fund development. so far i came up with grant proposals. Can you help with another...Plz....
asked by Caylee 
physics
The amplitude of a system moving in simple harmonic motion is doubled. Determine by what factor does period change since T=2pi(m/k)^(1/2), so it doesnt change. When i typed in unchanged, it says wrong since "the correct answer is not zero". Should i put in
asked by flame 
science
In defining the sizes of orbitals, why must we use an arbitrary value, such as 90 percent of the probability of finding an electron in that region?
asked by Joseph 
Organic Chemistry
Design a flowchart for the separation of a mixture that contains toluic acid, pbromoaniline, and anthracene. Whenever a reaction occurs, write the reaction completely.
asked by Jessica 
MathStatistics
draw scatterplots one for which the pearson correlation coefficient is r=1 and r=1 Stuck on how to get started
asked by noell 
Science
Advice on my Tennis Ball Launcher...That Shoots 90 Meters It can't rely on anything explosive, combustion, or electricity (anything dangerous) and has to be fired from a distance of 2 meters. 2 parts: Distance It has to shoot 90 or more meters Accuracy
asked by Nathan 
English
Can you please check if the following sentences are possible? I did some of the corrections myself. 1.He hoped to find Kurtz dead on his arrival at the inner station. He hoped that Marlow would find Kurtz dead by the time he got there. 2.The manager wanted
asked by Franco 
chemistry
the mechanisms between propanone and sodium hydrogensulphite
asked by kk 
Math
x+1  x+2 = ?   2x8 123x
asked by ella 
English
Thank you very much for your corrections. Here are some more sentences I'd like you to check. 1.Kurtz wanted to realize (to fulfil) his highly moral ideals but he failed. He wanted his ideals to come true but he failed because he was left alone to face the
asked by Franco 
philosophy of religion
Explain thoroughly and elaborately what Martin Buber means by real atheism as the eclipse of God.  any help will do. i'm desperate. i'm having a hard time understanding this subject. you can just tell me what atheism is according to buber even not
asked by jen 
composition and communication
I need help identifying verb tanses. I have to write 5 sentences about the " role education plays in successful financial planning" using different verb tenses. This is what I have: 1. Education plays an important role in a person’s financial status.
asked by kelly 
Biology
I can distinguish living from nonliving material? I can identify and describe five basic characteristics of life and give an example of each. I can How Dr.Penelope Boston is preparing to look for evidence of life on mars.
asked by oppa 
English
This is an essay. The tiltle was introduce myself. I decided to make it in the sahpe of a diary entry. what do you guys think. Is it good enough: 26th September 2010 Dear Diary, Today I had to wake up at 7.00pm so that at 7.30 I was at church where I met
asked by Matteo 
American History
Compare and contrast the British and American conduct of the Revolutionary War. How did each side propose to win, how realisttic was its assessment of the assessment of the situation and how did this prewar assessment influence the ultimate outcome of the
asked by Lindsey 
economics
2. Given a firm’s demand function, P = 24  0.5Q and the average cost function, AC = Q2 – 8Q + 36 + 3/Q, calculate the level of output Q which a) maximizes total revenue b) maximizes profits
asked by Bhupendra 
chemistry / physics
the specific heat capacity of seawater is 3900 j/kg degrees celcius. how much energy is needed to heat 500g of seawater from 20 degrees celcius to 90 degrees celcius? if not i need to know how to work it out
asked by freddie 
Science
ukaryotic cells contain A. a nucleus. B. cell membranes. C. organelles. D. All of these answers are true. Describe A,B and C
asked by Jim 
writing
Hello! I need to analyse fiction text in integrated text analysys. I`m not a native English speaker, therefore; i don't really understand how to analyse it. Could somebody help me with telling how to analyse?
asked by Anete 
college biostatistics
if the mean bp is 110 and the standard deviation is 15 where would 95% of population be
asked by donna 
AP world history
i have to write a DBQ promt question for the interaction between humans and the enviornment (demography and disease, migration,technology, and patterns of settlement) about roman empire
asked by emily 
AP chemistry
8.3 grams of NaCl and 3 grams of KBr were dissolved in 47 mL of water. What is the mole fraction of KBr in the solution? I know that the mole fraction of the KBr and Nacl (without using the mL H2O is .2, but, i am confused on where i use that mL in the
asked by Chem is try 
English
I really need to know if the rephrasing is correct. As I'm not a native speaker, I need to consider all the possible alternatives (?).It doesn't matter if the same concept has been repeated all over again.Thank you very much for you cooperation! 1.Kurtz
asked by Franco 
chemistry
How many grams of water are formed when 43.4 g of hydrogen are consumed in an excess of oxygen? I got 390.6 is this correct?
asked by amber 
chemistry
Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 > 2Fe(C2O4)33 +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid.
asked by amber 
chemistry
a 340.4 ml sample of solution contains 27.4 g of cacl2. calcuate the molar concentration of calcium ion in this solution. this is what i did 27.4(110.98) =.247mol .247mol/34.4L=.726Mcacl2 is this correct?
asked by amber 
English
Thank you very much for heping me. Here are some more alternatives I'd like you to check. 1) Kurtz is said to be a brilliant talker. 2) He was good at talking. His main talent was that he was a brilliant talker who could charm (?) his audience with (or
asked by Franco 
Calculus
Does the limit exist for (x^21)/(abs(x1)) as x goes to 1?
asked by John 
physics
what happens to the speed of an airplane with a 25 km/h tailwind pushing ahead from tail to front?
asked by jL 
History
Why did Britain react so differently and harshly after the boston tea party?
asked by Bailey 
physics urgent
an object travels at a rate of 48.5 km/sec. how many cm/min would that be
asked by shaweta 
physics urgent
determine the estimated uncertainty for the area of circle with a radius of 10.45+0.5cm
asked by shaweta 
chemistry
can anyone tell me about the molecular orbital energy order in energy level diagrams????its molecular n not atomic.....
asked by vishesh 
historical cultural
The Congress of Berlin in 1878 sought to limit the expansion of?
asked by mone 
historical cultural
The Triple Alliance represented what change in German foreign policy?
asked by mone 
us government
what are some of the legal fictions that Tocqueville discussed? HELPPP PLEASEE !!!
asked by Anonymous 
algebra
The power of a quotient rule  simplify (3y^8/2zy^2)^4 I need help in solving this problem  I do know to solve what is in the parentheses first. by the 4th power...but I need detailed guidance in order to grasp the concept  ty:)
asked by maryk 
Physics
A coin is placed 17.0 from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 33 is reached and the coin slides off.What is the coefficient of
asked by Karlee 
physics
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 89 at a speed of 93 ?
asked by Karlee 
chemistry
To analyze for barium in an unknown white powder, an excess of sodium sulfate solution was added to a 0.576 g sample of the powder dissolved in water. A white precipitate of BaSO4 was isolated, dried, and found to weigh 0.438 g. What is the mass percent of
asked by amber 
Essay
I'm writing an essay on the topic " The most memorable moment in your life" and I was wondering if you guy could give me suggestions on how I could start my introduction. Thanks ( The most memorable moment I chose was the first day of my summer vacation)
asked by Shadow 
math
simplify (39)+(38)
asked by brii 
math
the lowest temperature on a winter morning was 9f later that same day the temperature reached a high of 24 by how many degrees fahrenheit did the temperature increase
asked by kiki 
Physics
An airplane normally flies at 280 km/h. What is its airspeed if it experiences 80 km/hr headwind?
asked by Catherine 
Physics
An airplane normally flies at 280 km/h. What is its airspeed if it experiences 80 km/hr headwind?
asked by Catherine 
art
find a image for near east and the date/time of the image and material used and used for and symbolism
asked by kiki 
Science
P: If wave a has an amplitude of 3 meters then inteferes wiht wave b that has an amplitude of 2 meters. the sum of te waves produce wave c with 5 meters Q:what is the wave interaction explain? P
asked by Jacytiopa 
math
subtract 5x2X+8 FROM 2X+9X
asked by kiki 
math
(0.3)0.05(0.3)
asked by sam 
chemistry
How much heat is released when one gram of toluene burned?
asked by Dan 
Chemistry
How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned
asked by Dan 
math
89 92 83 96 and 99 what the mean
asked by sam 
English
In the Minister's Black Veil by Nathaniel Hawthrone. What reasons does Hooper give for not wanting to remove his veil? I came up with one reason: that there is a Black Veil on everyone But what will the other reasons be? "Why do you tremble at me alone?"
asked by Amy~ 
Science
P: If wave a has an amplitude of 3 meters then inteferes wiht wave b that has an amplitude of 2 meters. the sum of te waves produce wave c with 5 meters Q:what is the wave interaction explain? Also m,ay you explain what destructive inteference is and
asked by Jacytiopa 
history
what are 12 good points about king henry viii??
asked by anonymous 
math
8 over 13 to a decimal number rounded to the nearest hundredth
asked by sam 
English
Thank you vey much for your last corrections. Here are some more alternatives I'm not sure of. 1) In Chapter 7 Marlow interrupted (suspended??) his story to describe Kurtz to the other sailors (can you say: “to his fellowship?). Kurtz became important to
asked by Franco 
biology
the index of refraction of h2o is 1.33. find the angle of refraction of a beam of light in air hitting the h2o surface at an angle of 60 degrees n(air)=1.00
asked by jessica 
calculus
Determine the coordinates of the point of intersection of the two perpendicular lines that intersect on the yaxis and are both tangent to the parabola given below. y = 3x2
asked by c 
Business
why has canada import and export trends decrease during the year 2001?
asked by Alen 
graph on excel
ok so I did a radiation and distance lab: this is my results: Distance(cm) Counts(30 sec) 0 1729 1 634 2 391 3 239 4 150 5 124 6 114 7 82 8 58 9 62 10 60 11 36 12 45 so it asks me to make new columns on excel titled the following:(note: the 2 and 3 are
asked by hannah 
Physics
If I throw a tennis ball straight up in the air at the same time my friend throws one straight down at the same heightinitial height 3 feet and initial speed 2 km, which ball lands on the ground first, has the greater acceleration, lands with a greater
asked by Aubrey 
12/6
WHAT IS THE RAZON 2 OR 6
asked by ROSA 
math
if $1747.56 is including HST, what is that price without the HST?
asked by martha 
Physics
three vectos are shown in fig. 332. their magnitudes are given in arbitrary units. Determine the sum of the three vectors. Give the resultant in terms of (a) components, (b) magnitude and angle with the x axis. (332 the figure has three rays all
asked by R 
Chemistry
Consider the following errors that could be made when running TLC. Indicate what should be done to correct the error. a) a twocomponent mixture containing 1octene and 1,4dimethylbenzene gave only one spot with an Rf value of .95. The solvent uses was
asked by Jordyn 
Physics
If I take a glob of mud and throw it against a wall with the speed of V and stops in time T and than I take a ball and throw it and it hits the wall with speed V and leaves the wall a time T later at a speed of 0.5V and they both have same value and mass,
asked by Allen 
chemistry
A nickel has a mass of 5.000 grams and is composed of 25% nickel and 75% copper. What is the mass of copper in the nickel? How many moles of copper are in this nickel? How many copper atoms are in this nickel?
asked by Sarah 
finance
cpu company currently pays a divdend of $2.50. dividends are expected to increase at the rate of $.25 per share for the next several years. determine the current rate of CPU's common stock to an investor who expects to be able to sell the stock for $35 per
asked by gina 
11th grade
At her wedding, Jennifer lines up all the single females in a straight line away from her in preparation for the tossing of the bridal bouquet. She stands Kelly at 1.0 m, Kendra at 1.5 m, Mary at 2.0 m, Kristen at 25 m, and Lauren at 3.0 m. Jennifer turns
asked by john 
math
Find the Cartesian product or cardinal number as requested A = {i, a} B = {t, d, m} Find A × B
asked by Anonymous 
Math
How Do You Solve This Problem: [(8*2) 13]^3+(41)^2+42*3+36=?
asked by Sumaiya 
college chemistry
You are given solutions of HCl and NaOH and must determine their concentrations. You use 38 mL of NaOH to titrate 100 mL of HCl and 23.2 mL of NaOH to titrate 50 mL of 0.0782 M H2SO4. Find the unknown concentrations.
asked by KELLY 
Organic Chemistry  Extraction
You have 100 mL of a solution of benzoic acid in water; the amount of benzoic acid in the solution is estimated to be about 0.30 g. The distribution coefficient of benzoic acid in diethyl ether and water is approximately 10. Calculate the amount of acid
asked by Camille 
Science(cell Parts)
My Project is a Cell City For Example, my city is McDonald's, so the Nucleus is The ordering desk, the Mitochondria is the workers, and the Wall is the Cell Membrane.I Don't have Anymore ideas For The Rest Of The Organelle. These Are The Organelle:
asked by Rixy 
College Chemistry
Sodium hydroxide is used extensively in acidbase titrations because it is a strong inexpensive base. A sodium hydroxide solution was standardized by titrating 27 mL of 0.1628 M standard hydrochloric acid. The initial buret reading of the sodium hydroxide
asked by KELLY 
C.C. English
We have to rewrite this sentence to remove wordiness and jargon: Have you ever been accused of flagellating a deceased equine? What does this even mean?
asked by Avalon 
physics
An airplane has a mass of 33500 kg and takes off under the influence of a constant net force of 41500 N. What is the net force that acts on the plane's 82 kg pilot?
asked by gabe 
Biology
How does a plant growth regulator differ from a plant growth hormone?
asked by Emily 
Math
The graph of any quadratic function can be drawn from the vertex form of the equation, by performing 1,2,3,or 4 transformations on the graph of f(x) = x sqaured
asked by Matthew 
English
Thank you for your last post. Here are some sentences on clothes I'm not sure of. 1)My mum usually gives me 50Euro pocket money monthly to spend on clothes. 2) I don’t receive (?) any pocket money from my parents but they give me money whenever I need
asked by Franco 
algebra
multiplying monomials  please advise if this is correct? If not please advise where I went wrong? 12sq*3s = 36sq^2
asked by maryk 
Hum/205
Next month, the museum will be hosting an exhibition on the social role of the arts in early Chinese and Japanese civilizations
asked by Anonymous 
Physics
Researchers have found that a gecko's foot is covered with hundreds of thousands of small hairs (setae) that allow it to walk up walls and even across ceilings. A single foot pad, which has an area of , can attach to a wall or ceiling with a force of 11 .
asked by Kelli 
chemistry
what is the equation for gamma decay?
asked by hannah 
Math
Describe and correct the error in writing the number 81,700,000 in scientific notation. Standard form 81,700,000 product form 81.7*100,000 scientific notation 81.7*10
asked by Anonymous 
math
An elf has a staircase with 10 steps to climb. Each step it takes can cover either one stair or two stairs. In how many ways can the elf climb the stairs? For n stairs?
asked by jenny 
Algebra
graph inequality on a plane 4x+5y is less than or equal to 20
asked by Layne 
Math
Simplify by removing factors of 1 2w4/2w
asked by Alex 
science
What does the () around an element mean, for example Mg(OH)2
asked by Kim 
algebra
2v+18=164(v+7)
asked by Sue 
Algebra 2
When you solve 6 + 52r3≥ 4, is the answer r ≥ 13/10 and r ≤ 17/10?
asked by danny123 
Physics
To stop a car, you require first a certain reaction time to begin braking. Then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 80.0 km/h,
asked by Bob 
Math
How would you explain this problem? [(8*2) 13]^3+(41)^2+42*3+36=?
asked by Sumaiya 
algebra
7x+5=4
asked by rivaldo 
math
how do you describe and correct errors when writing the number 81,700,000 in scientific notation?
asked by Anonymous 
Physics
During a circus performance, a 75kg human cannonball is shot out of an 19mlong cannon. If the human cannonball spends 0.94 s in the cannon, determine the average net force exerted on him in the barrel of the cannon
asked by Jibri 
Physics
At a time when mining asteroids has become feasible, astronauts have connected a line between their 3760kg space tug and a 6100kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are
asked by Xavier 
Physics
A 83.0kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.80 m/s2
asked by Xavier 
college english
I have to write an essay on my neighborhood. What questions or things can I include? I need ideas please.
asked by Anonymous 
Math
Amy purchased a pair of shoes for $52.83 during a 25% off sale. what was the regular price?
asked by Layne 
3rd grade
what is the best estimate of 89+12 a 90 b. 100 c. 80 d. none of these
asked by tia 
Math
How do I simplify this expression? 2x+7+3x
asked by Dawn 
Physics
I riding in a car at constant velocity and see an open manhole. I take out an watermelon and hold it out window. My speed is 10m/s and the initial height of watermelon is 1 m. I need to do a calculation to be able to know how far ahead of manhole I have to
asked by Julia 
physics
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 85m at a speed of 96km/hr? How do I figure this out if no mass is given?
asked by Anonymous 
Physics
A cart has a constant acceleration of a = 2m/s2. At a certain instant its speed is 5 m/s. What is its speed 2 s later and 2 s earlier?. What is its average speed during the time interval of 4s.?
asked by Jay 
algebra
Multiplying Polynomials  please assist I have the following answer  but am sure It is wrong  (3c^2dd^3+1)8cd^2 = 24c^2d^28cd^5+8cd^2?
asked by maryk 
Chemistry
A volume of 50.0 mL of aqueous potassium hydroxide was titrated against a standard solution of sulfuric acid. What was the molarity of the KOH solution if 19.2 mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq) +H2SO4(aq)» K2SO4(aq)+2H2O(l)
asked by Ellen 
English
I have a few doubts regarding the use of the present perfect. I really hope you can have a look at them, too. Thank you!! 1) How long ago did you (last?) see him? 2) When did you last see him? 3) How long haven't you seen him? (Is it wrong?)Haven't you
asked by Franco 
Chemistry
Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide,H2O2, can be titrated against a solution of potassium permanganate, KMnO4. The following equation represents the
asked by Ellen 
6th Grade English
Hello, I am looking at the subject of nocount nouns. Which says that it does not have a singular or a plural form. The school book gives Paper for an example. But since you can say "papers" which is plural. How can paper be a noncount noun?
asked by Val 
physics
A dart gun is fired while being held horizontally at a height of 1.00 m above ground level and while it is at rest relative to the ground. The dart from the gun travels a horizontal distance of 5.00 m. A college student holds the same gun in a horizontal
asked by ben 
criminal procedure
In a hearing challenging the probable cause upon which an arrest was based, a warrantless arrest is viewed the same as an arrest based on a warrant. True or false ?
asked by Steve 
Dr. Bob can you look at this
If I take a glob of mud and throw it against a wall with the speed of V and stops in time T and than I take a ball and throw it and it hits the wall with speed V and leaves the wall a time T later at a speed of 0.5V and they both have same value and mass,
asked by Allen 
College Chem
How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned? Convert liters to milliliters and then to grams. can you convert mil to grams?
asked by Dan 
Physics
An airplane flies at 200.0 km/h relative to the air. What is the velocity of the plane relative to the ground if it flies during the following wind conditions? a. a 50.0km/h tailwind b. a 50.0km/h headwind.
asked by Melissa 
geometry
M angle lmn =6x20 howdo i find out what x is
asked by eric 
physics
A train is traveling up a 3.6 incline at a speed of 3.30 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily? and how far did the last car travel before momentarily coming
asked by Anonymous 
Math
Find the LCM of this 6^4c^9, 3a^3c^7, 14a^8c^7
asked by Alex 
Math
Of people who died in the US in recent years, 86% were white, 12% were black, and 2% were Asian. (This ignores a small number of deaths among other races.) Diabetes cause 2.8% of deaths among whites, 4.4% among blacks, and 3.5% among Asians. The
asked by Becky 
Math
How would I simplify this? 2x(9x4)
asked by Dawn 
physicsssss
two blocks are connected over a pulley. The mass of block A is 10 kg and the coefficient of kinetic friction between A and the incline is 0.24. Angle èof the incline is 30°. Block A slides down the incline at constant speed. What is the mass of block B?
asked by ashley 
Chemistry
What would the molarity of 50 mL of 3% hydrogen peroxide be if it's volume/volume? I know how to do weight/volume but not this, someone help?
asked by Anonymous 
AP English Literature
I'm doing a research essay about "anchor babies", or in other words, babies born from illegal immigrants. How would you write a good thesis?
asked by Melissa 
geometry
mo bisects angle lmn,m angle lmn = 6x20, m angle lmo= x+32 find m angle nmo but how if i don't know what lmn is
asked by eric 
PHYSICSS
A block is projected up a frictionless inclined plane with initial speed v1 = 3.40 m/s. The angle of incline is è = 31.1°. (a) How far up the plane does it go?(m) (b) How long does it take to get there? (s) (c) What is its speed when it gets back to the
asked by ashley 
Calculus
Simplify as much as possible: e^3ln5 Does the three become an exponent on 5? So.. =e^ln5^3 =25 Can someone verify this for me please?
asked by Jon 
Science
If an astronaut could hop 40 cm high on Jupiter, how high could he or she jump on Earth?
asked by Glen 
College Chemistry
I balanced the equation: HBr(aq) +NH3(aq)>NH4Br I need to find the ionic equation and the net ionic equation
asked by KELLY 
Science
If Earth's mass were smaller, how would Earth's gravity be affected?
asked by Glen 
Chemistry
Calculate the volume of Carbon dioxide gas generated when 40.0 g of sodium carbonate reacts with hydrocholric acid according to the following reaction. The gas is to be collected at STP Na2CO3 + HCL> NaCL +H2O + CO2(g)
asked by Patrina 
chemistry
what is the molarity of a solution made by mixing 178.5 of 1.5 M NaCl with 283.4m of 4.3M NaCl Mnacl*L nacle =(1.5)(.001718)=.0026775 moles nacl=(4.3)*(.002834)=.0121862 total moles = .0026775+.0121862=.0148moles final volume = .001785+.002834=.004819 L
asked by amber 
chem
whats the net ionic equation for the following reaction AgNo3(aq)+Na2SO4(aq) answer 2Ag+(aq)+SO42 (aq)___> Ag2So4(s) correct?
asked by amber 
physics
A small weather rocket weighs 15.5 N. The rocket is carried up by the balloon. The rocket is released from the balloon and fired, but its engine exerts an upward force of 11.0 N. What is the acceleration of the rocket?
asked by devon 
Organic Chemistry
Determine bond length and bond strength? The picture of the problem is shown here: oi52[insert dot]tinypic[insert dot]com/jfgnb6[insert dot]jpg I got the following: I think that the strongest bond is the triple bond (A). I think that the shortest bond is
asked by Lauren 
Algebra
How to solve this x(1+x)=2 Find all the real solutions I can't remember how to solve this... the answers are 2, 1 I think...
asked by Amy~ 
Maths  trig
Solve 3cos2x  7cosx = 0, when 0
asked by Rose 
Math
How would I simplify this? Explain please!!! 7(2x+2)9(1+6x)
asked by Dawn 
Math
Find all numbers for which the rational expression is undefined. m^38m / m^225
asked by Alex 
physics
if a motorcycle accelerates from rest through the 400 m in 10 sec flat. What is its acceleration?
asked by jill 
Hum176
What is comparing and contrast coverage?
asked by victoria 
AP Calculus
A function g(x) has the following characteristics: 1) It is rational with a quadratic polynomial in both the numerator and the denominator. 2) It has a removable discontinuity at x=1 and the limg(x) as x approaches 1 is 1/9 3) The graph of g(x) has a
asked by Jackie 
math
Name the property that justifies each step. [(2 * 100) + (3 * 10)]+ [(1 * 100) + (5 * 10)] = (2 * 100) + [(3 * 10)+ (1 * 100)] + (5 * 10)__________ property = (2 * 100) + [(1 * 100)+ (3 * 10)] + (5 * 10)___________ property = [(2 * 100) + (1 * 100)]+ [(3 *
asked by m 
chemistry
write the balanced net ionic equation for this reaction Ba(OH)2+HCL>
asked by amber 
Geology
I know that Divergent margins, also known as rifting or spreading centers, happen when two plates move away from one another. Convergent margins happen when two plates move towards on another. The last transform faults happen when plates move past each
asked by Lynn 
managerial eccon
Suppose that a firm is currently employing 30 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is: $3,600. what is the averge variable cost?
asked by stacey 
Biology
In what situations would sampling work best for estimating population size, in what situations would mark and recapture work best and why?
asked by Quentin 
Chemisty
How can naphthalene be separayed from a mixture of KBr and Sand? How can you separate NiCO3 from NaCO3 in detail? How can you separate AgCl from NaCl in detail?
asked by brittanee 
Math
add, simplify if possible. z+r/zr^2 + 8z+r/z^2r
asked by Alex 
10th grade
A soccer player kicka a ball with an initial velocity of 10 meters per second at an angle of 30 degress above the horizontal. the magnitude of the horizontal component of the ball's initial velocity is
asked by elana 
6th grade math
A spider has 8 legs. An ant has 6 legs. There are a group of spiders and a group of ants. The groups have equal numbers of legs. What is the least number of spiders and ants in each group.
asked by peyton 
Math
What is the equation (in slopeintercept form) of the line passing through the points (6, 1) and (0, 4)? y=1/2x+2 y=1/2+ 11/2 y=2x+4 y=2x+8 Suppose that the daily cost and revenue functions for the production and sale of x stopwatches are given by C(x)
asked by lynne 
physics
A stream is 30. meters wide and its current flows southward at 1.5 meters per second. A toy boat is launched with a velocity of 2.0 meters per second eastward from the west bank of the stream a. what is the magnitude of the boat's resultant velocity as it
asked by elana 
physics
A car is moving down a street at 51 km/h. A child suddenly runs into the street. If it takes the driver 0.97 s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?
asked by mike 
Algebra
For this equation x^(2) + x + 2 which you can't factor but then you can use the quadratic formula but than why is the answer no real solutions when I can use the quadratic formula?
asked by Anonymous 
college bus. law
Hello, I need help writing my short essay. Instructions: IRAC stands for Issue, Rule, Application and Conclusion. When properly answering a legal essay, the writer should clearly identify the legal ISSUE in the fact pattern given. The proper RULE of LAW
asked by Niecy 
Physics
At a time when mining asteroids has become feasible, astronauts have connected a line between their 3760kg space tug and a 6100kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are
asked by Xavier 
Physics
riding in a car at constant velocity and see an open manhole. I take out an watermelon and hold it out window. My speed is 10m/s and the initial height of watermelon or any fruit is 1 m. I need to do a calculation to be able to know how far ahead of
asked by Julia 
Physics
If I take a glob of mud and throw it against a wall with the speed of V and stops in time T and than I take a ball and throw it and it hits the wall with speed V and leaves the wall a time T later at a speed of 0.5V and they both have same value and mass,
asked by Allen 
Finance
moussawi ltd's outstanding bonds have a $1000 par value, and they mature in 5 years. their yield to maturity is 9%, based on semiannual compounding, and the current market price is $853.61. what is the bonds annual coupon interest rate?
asked by Anonymous 
Algebra
Steps to factoring this x^3  8 ? I'm only used to factoring out the x when the x is in the equation like x^ + x + x
asked by Anonymous 
Geo
Conjecture: The sum of the first 30 odd whole numbers is? Conjecture: The sum of the first 30 even numbers is?
asked by Skylar 
Math
You are playing a card game with a full deck of 52 cards. You win if you draw a red card that is a multiple of 5. What are your chances of winning on your first draw?
asked by Colton 
Algebra
In cost in millions of dollars to remove x% of pollution is a lake modeled by C=5,000 over 2002x. (a) What is the cost to remove 50% of the pullutant.
asked by Al 
social studies
what are some major characteristics in the eastern hemisphere?
asked by . 
statistics
Media Disk, Inc. duplicates over a million 3.5” floppy disks each year by copying masters to stacks of blank disks. The company buys its blank stock from two different suppliers, A and B. The manager has decided to check each supplier’s stock by
asked by Anonymous 
world history
i don't know the tesis of this article of " the worst mistake in the history of the human race"
asked by LUCY 
marketing
Your team has been hired by ABC company’s senior management to conduct a research project. The company has 40 employees and has been in business for 25 years. The company offers sales & service on all sizes of new Xerox copiers. The company has been
asked by Jeff 
Physics
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 95 at a speed of 95 ? Express your answer using two significant figures.
asked by Eden 
Hum 205
I am writing an essy in which I time travel back to three different civilizations. I have to write my info in 3 book chapters. I also have to write an appendice? I do not understand what this is or how to write it?
asked by Gill 
PLEASE HELP WITH CALCULUS!!!
A function g(x) has the following characteristics: 1) It is rational with a quadratic polynomial in both the numerator and the denominator. 2) It has a removable discontinuity at x=1 and the limg(x) as x approaches 1 is 1/9 3) The graph of g(x) has a
asked by Jackie 
English
When you are writing an essay that refers to two works and you are using a quote, do you (Alveraz, 30) or just put (Alveraz 30) with no comma. Thanks
asked by Michael 
Sociology
How would you describe current British culture? Not stereotypes like drinking tea, going to pubs, etc. I can't find it anywhere.
asked by Avalon 
algebra
Multiplying Polynomials  please assist I have the following answer  but am sure It is wrong  (3c^2dd^3+1)8cd^2 = 24c^2d^28cd^5+8cd^2?
asked by maryk 
Calculus
In increasing order, rank: 3^ln 2, 2^3, 2^ln 3 *do not use a calculator, and explain your choices Obviously, 2^3=8 So, instinctively, I entered the other values into my calculator just to rank the quantities using decimal places. However, in my calculator,
asked by Jon 
Geometry
If a whole bunch of lines(no two parallel, no 3 concurrent) intersects in a plane 2926 times, how many lines are a whole bunch?
asked by Skylar 
Physics
What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/20 of its value at the Earth's surface?
asked by Eden 
lll
what is the min # for a few?
asked by .s 
12th grade
If a car is accelerating downhill under a net force of 3674, what additional force would cause the car to have a constant velocity?
asked by Les 
Chemistry
Use de Broglie's relationship to determine the wavelength of carbon atom moving at 2.3 x 10^5 m/s.(Hint: First determine the mass in kg of one move of carbon atoms)
asked by Jessica 
science
what events or objects were studied in Hubble's paper A RELATION BETWEEN DISTANCE AND RADIAL VELOCITY AMONG EXTRAGALACTIC NEBULAE?
asked by CJ 
anna
From the poem "The Wanderer" What is the plight of the wanderer "earthwalker"? How did he become what he is and what is he seeking?
asked by english 
Statistics
What zvalue corresponds to the 18th percentile?
asked by Lori 
math
The height, in feet, of a free]falling object t seconds after being dropped from an initial height s can be found using the function h = ]16t2 + s. An object is dropped from a helicopter 784 feet above the ground. How long will it take the object to
asked by Debbie 
Physics
If the jet is moving at a speed of 1800 at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.4 's The jet is moving in a verticle loop
asked by Eden 
algabra 2
One side of a triangle is 4 cm longer than the shortest side and 2 cm shorter than the longest side. The perimeter is 38 cm. Find the dimensions of the triangle.
asked by Lily 
physics
An object is thrown vertically upward with a speed of 31.8 m/s. How high does it rise?
asked by Bala 
physics
A bob of mass = 0.250 is suspended from a fixed point with a massless string of length = 23.0 . You will investigate the motion in which the string traces a conical surface with halfangle = 25.0. What tangential speed must the bob have so that it moves in
asked by bryan 
Physics
If the jet is moving at a speed of 1800 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.4 g's The jet is moving in a verticle loop
asked by Eden 
geometry
what is the area of a hexagon with a 48 inch perimeter? i know its 166.277 but i need that in square root form?
asked by nick 
6th grade E/LA
What is a predicate ajective and what is a predicate nomanative?
asked by Brianna 
10th grade
A stream is 30. meters wide and its current flows southward at 1.5 meters per second. A toy boat is launched with a velocity of 2.0 meters per second eastward from the west bank of the stream a. what is the magnitude of the boat's resultant velocity as it
asked by elana 
chemistry
im stuck on finding the molarity of a substance and its due tomarrow. someone please help. 5 moles of HCI in two liters. 2 moles of NaOH in 1 liter. 0.5 moles of HCI in one liter. 36 grams of HCI in one liter. thanx, alex
asked by alexhundra 
Music Appreciation
The styles of singing in Wagner and Verdi operas differ. Jane says that the style of singing in a Verdi opera is virtuosic and elaborate. Lynn says that the style of singing in a Wagner opera is more syllabic. Who is correct in describing the different
asked by LVal 
Physics
The result of 1.51751x10^4 divided by 6.451x10^3 to 2 significant figures is?
asked by peter 
Physics
The jet is moving at 500 m/s in a verticle loop, with a minimum radius of 4000 m. Calculate the 69kg pilot's effective weight (the force with which the seat pushes up on him) at the bottom of the circle, and at the top of the circle (assume the same
asked by Eden 
Physics
The sum of 5.2713x10^3 + 6.54014x10^3 expressed to 4 significant figures would be?
asked by peter 
Statistics
In a given normal distribution, the standard deviation is 14.4 and 8.27% of the distribution lies to the left of 60. What is the mean?
asked by Lori 
biology
Name three ways that the science of biology has/does, or might impact you as an individual.
asked by malachi 
algebra
solve the absolute value equation 1+6c7=3
asked by Anonymous 
11th grade Algebra
A number is multiplied by 3 and then this product is decreased by 7. The result is 4 less than twice the opposite of the number. what is the number?
asked by Sally 
6th grade
WHAT IS THE GREENHOUSE EFFECT???
asked by TYLER 
SOCIAL STUDIES
I am doing a country project on India. I need some good toursist attractions from India. I know a one and that's the Taj Mahal. But I need some more. Please list a few more tourist attractions, it will be a great help! thanks alot!!!
asked by Zoey 
chemistry
Calculate the heat that is either gainer or lost when 25.0 g of steam ( MW=18.02, cp: .0753, delta H fus 6.01 kj, delta H vap:40.67 kj, at 100C condenses to liquid water at 100 C.
asked by Sarah 
physiology
what is the relatioship between electrical activity and muscle force produced ?
asked by jas 
math
there are 267 students and teachers in a school. the ratio of students to teachers is 25:2 . How many students and teachers are there?
asked by terri 
Physics
Consider the earth following its nearly circular orbit about the sun. The earth has mass 5.98*10^24 and the sun has mass 1.99*10^30. They are separated, center to center, by r=150 million k. What is the size of the gravitational force acting on the earth
asked by Eden 
chemistry
50.0 mL of water is heated from 60 C to 85 C. How much heat was absorbed by the water sample in joule Can anybody help me understand the process or rules to figuring this out? Thanks
asked by Brian 
Algebra
Write 9850 in scientific notation
asked by Melissa 
math
looking for any mathematical characteristic of the number 13 for a math project
asked by cody 
math
N and P are integers greater than 1 5N is the square of a number 75NP is the cube of a number smallest value for N+P IS what? thank you so much
asked by AL 
Physics
How many m3 are there in 3.0475x10^5 cL, expressed to 3 significant figures?
asked by stacy 
Physics, Science
A 26 kg block is connected to an empty 1 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.435 and the coefficient of kinetic friction between the table and the block is 0.320.
asked by Shae 
SOCIAL STUDIES
Is it true that Shah Jahan (emperor who built the Taj Mahal) was forced to cut off his hands after he built the Taj Mahal? If this is true then I need proof. I tried going on wikipedia but it doesn't say anything about that on history or any other heading.
asked by Zoey 
Physics
An object is thrown vertically upward with a speed of 31.8 m/s. How long does it take to reach this highest altitude?
asked by Bala 
Chemistry
If the initial pressure of NH3(g) is 0.7317 atm, calculate the % of NH3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 500.0 °C is 67100.00. The initial pressure of the reaction products is 0
asked by Kyo 
calc
y(s)= 1/(6(s^2))  5/s Find Y'(s)
asked by Mel 
Chemistry
An ore contains Fe3O4 and no other iron. The iron in a 51.98 gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 32.8 grams. What was the percent Fe3O4 in the sample of ore? Answer in
asked by Anonymous 
gammar
• Read two of the five paragraphs on the second page of this appendix. Write a brief paragraph of about 150 words in which you do the following: o Identify which paragraph was more effective and analyze why this is so. o Include a discussion of sentence
asked by Cara 
physics
A car with an initial speed of 23.7 km/h accelerates at a uniform rate of 0.92 m/s^2 for 3.6s. Find the final speed and the displacement of the car during this time.
asked by Anonymous 
chemistry
using the values for heat of fusion, specific heat of water, or heat of vaporization, calculate the amount of heat energy. Calories needed to warm 20.0g of water at 15 degrees Celsius to 72 degrees Celsius (one step) Show work please
asked by matt 
Science of Biology
Name three ways that the science of biology has/does, or might impact you as an individual. SOMEONE PLEASE HELP ANSWER THIS QUESTION!!! THANKS :)
asked by Malachi 
Physics
In 1865, Jules Verne suggested sending people to the Moon by launching a space capsule with a 228.8 m long cannon. The final speed of the capsule must reach 11.39 km/s. What acceleration would the passengers experience?
asked by Bala 
English
1. What you have to do is to do your best. 2. What you have to do is do your best. (Which one is right? Do we have to use 'to do' or 'do'? Are both OK?)
asked by rfvv 
Physics
Superwoman is hovering above the ground when a person freefalling goes by her at a terminal velocity of 140 km/h. Unfortunately, the parachute does not open. Fortunately, Superwoman is around. If it takes her 1.9 s to realize the person is in distress,
asked by Emily 
geometry
the scale factor between figure A and figure B is 0.25. If one side length of figure B is 56 yards, what is the corresponding side length of figure A?
asked by linda 
College Chem
Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.
asked by Kelli 
English
11. Upon the death of Spitz in The Call of the Wild, Francois and Perrault decide that the new sledteam leader should be
asked by leyla 
Math
A laboratory has 60 cubic centimeters of a solution that is 40% HCI acid. How many cc of a 15% solution of HCI acid should be mixed with the 60 cc of 40% acid to obtain a solution of 25% HCI? How much of the 25% solution is there? I don't know how to write
asked by a 
social studies
I messed up on my other social studies question. i ment to ask if the BUILDER of the taj mahal had his hands cut off by emperor shah jahan. Is this true? i need proof if this is true. thanks alot
asked by Zoey 
Math
Write a false conditional statement. Is it possible to insert the word "not" into your conditional to make it true? If so,write the true conditional. FalseIf all male are human, then all human are male. TrueIf all male are human, then all human are not
asked by Shadow 
math 115
graph shows the yearly food cost for a family. 30% of the food cost rom 2002 was spent at restaurants. How much money did they spend that year at restaurants?
asked by crystal 
precalculus
Horizontal Translation and dialation Problem : let f, g, and h be defined f(x)= x2 2< or equal to x < or equal to 2 g(x)=x3 for all real valuse of x h(x) = 1/2 x for all real values of x a. f(g(x))= f(x3). What transformatioon is applied to function f
asked by kayla 
Physics
A biotech company produces a solution with an active biomass of 8.7604x10^6 cells per litre of solution. The solution is shipped by tanker truck with a volume of 4.16462x10^1 m3. How many cells are being sent per shipment, expressed to three significant
asked by stacy 
Physics
A refinery receives 4.23434x10^4 m3/h of crude oil. After the distillation process roughly 4.76216x10^1 % of the crude is converted to miltitary aviation fuel (JP4). What is the amount of JP4 produced in a day in L, expressed to 4 significant figures?
asked by christine 
Chemistry
A solution having a volume of 3.0L contains 23 mmol of Oxygen 2. What is the molarity of this solution?
asked by Elly 
College Chemistry
What is the oxidation number of Cr2(SO4)3
asked by KELLY 
Science of Biology
What exactly is the Science of Biology?? PLEASE SOMEONE HELP ME ANSWER THIS!! :)
asked by Malachi 
accounting
The two cases described below are independent of each other. Each case provides the information necessary to prepare the stockholders' equity section of a corporate balance sheet. a. Early in 2007, Wesson Corporation was formed with the issuance of 50,000
asked by james 
Chemistry
When one pound of gasoline (made up of compounds of hydrogen and carbon) is burned in an automobile approximately 3 pounds of carbon dioxide, CO2, is given off. Carbon dioxide is one of the gases contributing to global warming. What information from this
asked by Chris 
College Chemistry
What is the oxidation number of (NH4)2SO4
asked by KELLY 
Physics
A box of books wighing 339 N is shoved across the floor by a force of 506 N exerted downward at an angle of 33° below the horzontal. The acceleration of gravity is 9.81m/s^2. If µk between the box and the floor is 0.59, how long does it take to move the
asked by Elizabeth 
math
Horizontal Translation and dialation Problem : let f, g, and h be defined f(x)= x2 2< or equal to x < or equal to 2 g(x)=x3 for all real valuse of x h(x) = 1/2 x for all real values of x a. f(g(x))= f(x3). What transformatioon is applied to function f
asked by kayla 
Psychology
What different tools of psychology help us with work and everyday life situations?
asked by Tiffany 
Physics
The coefficient of static friction between the 3.78 kg crate and the 38° incline is 0.306. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline? The acceleration of gravity is 9.8
asked by Elizabeth 
To:Ms.Sue
Is it even possible to include the word "not" in a conditional to make it true? I'm thinking of some false statement and putting "not" in but it still doesn't make it true.
asked by Shadow 
Math
h(x)=12x2 4x+5
asked by Anonymous 
Physics
The board sandwiched between two other boards weighs 92.6 N. If the coefficient of friction between the boards is 0.587, what must be the magnitude of the horizontal forces acting on both sides of the center board to keep it from slipping downward? Answer
asked by Elizabeth 
College Chem
I need to be able to describe how to prepare 20 mL of a 0.0050 M KIO3 solution from a stock solution with a concentration of 0.020 M.
asked by Kelli 
history.
evaluate how the age of enligtenment is a response to the age of absolutism. help please. please.
asked by amber. 
biology
Design a way to determine the effects of different concentrations of starch on the mass of dialysis tubing bags when the bags are allowed to sit water for several hours. Plan to put different concentrations of starch solutions in the bags. You may want to
asked by mike 
Physics
A car is traveling at 54.2 km/h on a flat highway. The acceleration of gravity is 9.81 m/s^2. PART 1: If the coefficient of kinetic friction between the road and the tires on a rainy day is 0.131, what is the minimum distance needed for the car to stop?
asked by Elizabeth 
math 12
log6=x and log8=y, determine an expression for log3 in terms of x an y.
asked by nat 
Physics
A 160 N block rest on a table attached to a string and pulley. The suspended mass over the side of the table has a weight of 53 N. PART 1: What is the magnitude of the minimum force of static friction required to hold both blocks at rest? Answer in units
asked by Elizabeth 
physics
A block of weight w = 25.0 N sits on a frictionless inclined plane, which makes an angle = 25.0 with respect to the horizontal, as shown in the figure. A force of magnitude F= 10.6 N , applied parallel to the incline, is just sufficient to pull the block
asked by michelle 
MGT330
Explain how globalization affect the four functions of management. Include specific examples.
asked by Tasha 
US History
what appears to be the relationship between personal income and a country's GNP
asked by Anonymous 
history.
evaluate how the age of enligtenment is a response to the age of absolutism. help please. please.
asked by amber. 
Physics
In 1865, Jules Verne suggested sending people to the Moon by launching a space capsule with a 228.8 m long cannon. The final speed of the capsule must reach 11.39 km/s. What acceleration would the passengers experience?
asked by Bala 
science
is your shadow longer or shorter than you if you are standing on a beach in miami at 3pm in late june
asked by diane 
Physics
A mining operation excavates 5.482x10^4 metric tonnes of ore each hour. In an 12 hour production shift, how much ore is excavated in kg, to 2 significant figures?
asked by christine 
English
1. She has begun English five years ago. 2. She has begun English for five years. 3. She began English five years ago. (Are they grammarical?)
asked by rfvv 
English
1. Many animals in the woods have been asleep all winter. 2. Birds have been away. 3. Under the snow, the ground has been hard. (In the sentences above, the present participle was used. What does the present participle refer to? Does it refer to
asked by rfvv 
8th grade Social Studies
How does the freedom to petition protect us from the federal government?
asked by Allana 
college chemistry
If the initial concentration of F(g) is 8.285 mol/L, calculate the % decomposition of F(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kc at 927.0 °C is 370.00. The initial concentration of the reaction products
asked by sparkle 
Foreign Languages
C'est la vie (What is the meaning of this one? How do you say it? Is it French?)
asked by rfvv 
math
Find the drivative of the function 4ã(x^2 )+ 2/(3X)^3 + 3/secX  5/cotX=
asked by Anonymous 
college chemistry
The value of the equilibrium constant (Kp) as represented by the first chemical equation is 4.57 x 102 at 395 °C. Calculate the value of the equilibrium constant (Kp) for the second equation at the same temperature. Express answer in scientific notation.
asked by sparkle 
math
using numbers 112 make all sides of a square equal 26 using 4 numbers a time
asked by Anonymous 
Chemistry
A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand against a constant external pressure of 2.00 atm at a constant temperature. Calculate the work in units of kJ for the gas expansion. (Hint: Boyle's law applies) Please explain thoroughly!
asked by Jack 
Chemistry
25.0 mL of a NaCl solution (concentration unknown) was found to react with 20 drops of the chloride test solution from the PU Chloride Test Kit. Calculate the mass of NaCl (in grams) in this solution. Calculate the mass of NaCl required to prepare 0.250 L
asked by kt 
US Government
Society operates more efficiently if government power is centralized. What reasons exist for continuing federalism in its current form? In other words, defend a federal system of government.
asked by Leanna 
Chemistry
a piston performs work of 210. L atm on the surroundings, while the cylinder in which it is placed expands from 10. L to 25L. at the same time, 45J of heat is transferred from the surroundings to the system. Against what pressure was the piston working?
asked by Jim 
Secondary school Chemistry
Describe in general how chromatography technique can be used to analyses food to identify if it contains any poison? and also Explain the benefits and limitation of the technique used
asked by JazzMusick 
statistics
Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29
asked by Stefania 
chemistry
what is the general formula for a hydrate?
asked by Danielle 
physics  light
Which principle of light is used in vision?
asked by Barbie 
math
simplify 3.041.935
asked by sam 
physics
By how much does the speed of a vehicle moving in a straight line change each second when it is accelerating at 4 m/s2?
asked by kaitlyn 
Chemistry
Suppose you tried to combine 42 grams of magnesium with 45 grams of oxygen. Which of the two substances would be left after the reaction? How much magnesium oxide will be formed?
asked by Chris 
algebra
you are planning to spend no less than 6000 and no more than 10000 on a landscaping project. Write an inequality to show how much you are willing to spend.
asked by Sam 
Chemistry
How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products? 4HCl + O2 > 2H2O + 2Cl
asked by Jennifer 
MAT 116
Combine like terms? 29/13u+2/13v18/13u+16/13v
asked by Jessa 
chemistry
How much of a 0.25 M NaOH solution is needed to neutralize 100 mL of a 0.15 M HCl solution? The units are mL
asked by jazmin 
Geometry
n:1,2,3,4,5,6 f(n):0,1,3,6,10,15 find the nth term and the 20th term in the sequence
asked by Skylar 
chemistry
a solution of sulfiric acid is 40% H2SO4 by mass and it has a density of 1.30g/ml at 25 degrees Celcious. the molarity of this solution is....?
asked by lizza 
Chemistry
H2O (l) requires the largest amount of energy to raise the temperature of 25.0g H2O of the substance from 15.0 *C to 37.0 *C. Calculate the energy. Hg (l) has the largest temperature change when 550 g of the substance absorbs 10.7kJ of energy. Calculate
asked by Jack