Questions Asked on
May 3, 2010

Chemistry 11th Grade
If a certain oxide of nitrogen weighing 0.11g gives 56 ml of nitrogen and another oxide of nitrogen weighing 0.15 g gives the same volume of nitrogen (both at STP), show that these results support the law of multiple proportions.
asked by Akashdeep 
English
1. The problem is so difficult that I cannot solve it. 2. The problem is too difficult for me to solve. 3. It is too difficult for me to solve the problem. (Are the three sentences the same? Do they come from the same structure? Can we omit 'that' in
asked by rfvv 
Chemistry
Which solution will have the greatest electrical conductivity? A. 0.50MHCl B. 0.10MRbOH C. 0.50MK3PO4 D. 2.0MC6H12O6 I thought the answer would be B, but it is C. Is it not B because the Ka is too small? Otherwise, C is has the smallest Ka.
asked by sh 
CHEMISTRY
A 6.6 × 10–4 M solution of MnSO4 is gradually made more basic by adding NaOH. At what pH will manganese(II) hydroxide begin to precipitate? For Mn(OH)2, Ksp = 2.0 × 10–13.
asked by Anonymous 
grammar
what grammatical name is given to the expression what made her choose me.
asked by excellent 
Organic Chemistry
The following reaction would produce a(n) __________. ROH + R'COOH →
asked by Tom 
college physics
A 280 g wood block is firmly attached to a very light horizontal spring, as shown in the figure . The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this
asked by peyton 
Chemistry 11th Grade
Nitrogen forms five compounds with oxygen in which 1.0 g of nitrogen combines with 0.572,1.14,1.73,2.28 and 2.85 g of oxygen respectively. Show that these figures agree with law of multiple proportion.
asked by Akashdeep 
chemistry
3. Use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO₂ is also a product of the decomposition. CuCo3*Cu9OH)2 > 2Cuo+Co2+H2O 0.004522431 moles of malachite
asked by Sally 
math
A ladder 14 ft long rests against a vertical wall. Let \theta be the angle between the top of the ladder and the wall and let x be the distance from the bottom of the ladder to the wall. If the bottom of the ladder slides away from the wall, how fast does
asked by peter 
English
Which is an example of verbal irony as spoken by Antigone? a. "You have yourself to consider, after all." b. "You must decide whether you will help me or not." c. ". . . and if I must die, / I say that this crime is holy . . ." d. ". . . if it means death,
asked by Alyssa 
Trig
Tan theta 12/5 ,pi
asked by Stacey grahaM 
English
Caesar disregards the omens for all of the following reasons except A. he does not trust the augurers. B. he does not want to appear cowardly. C. he feels fate is inescapable. D. he feels invincible. help!
asked by Alyssa 
chemistry
What is the concentration of silver(I) ion in a saturated solution of silver(I) carbonate containing 0.0092 M Na2CO3? For Ag2CO3, Ksp = 8.6 × 10–12.
asked by Anonymous 
Chemistry
a) moles of malachite in 1g: 1g / (221.12g/mol) = .004522 mol (b) moles of CuO produced: .72g / (79.55g/mol) = .009051 mol (c) ratio of moles of CuO produced per moles of malachite decomposed: 2CuO/CuCO3(OH)2 2*79.5/221.1 = 0.719 3. Use the mole ratio of
asked by Sally 
calculus
A ladder 14 ft long rests against a vertical wall. Let \theta be the angle between the top of the ladder and the wall and let x be the distance from the bottom of the ladder to the wall. If the bottom of the ladder slides away from the wall, how fast does
asked by peter 
Math
A polynomial function with rational coefficients has the following zeros. Find all additional zeros. 2, 2 + ã10
asked by Christopher 
Spanish
What is this in Spanish: You get dressed at 8 o'clock. Te vistes a las ocho. ? Is this the correct translation? If not, then what is the correct translation?
asked by Aly 
chemistry
What is the change in entropy when 0.290 g of silicon is burned in excess oxygen to yield silicon dioxide at 298 K? Si(s) + O2(g) > SiO2(s); ÄS° = –182.4 J/K at 298 K
asked by Anonymous 
Chemistry
An element crystallizes in a bodycentered cubic lattice. The edge of the unit cell is 3.5 Angstrom, and the density of the crystal is 7.39g/cm^3. Calculate the atomic weight of the element. A= ? g/mol
asked by Anna 
Physics
an 80 kg physics student is riding the cajun cliffhanger. this ride had a diameter of 8.0m (u:0.06)the ride produces enough centripetal force to suspend a student. 1.what is the force of friction to keep the student suspended? 2.what normal force is
asked by Maira 
economics (micro)
2. In the table below, assume a monopsonist has the marginalrevenueproduct schedule for a particular type of labor given in columns 1 and 2 and that the supply schedule for labor is that given in columns 1 and 3. (1) (2) (3) (4) (5) Number of MRP Wage
asked by Tom 
Rock Hill
What will the stopping distance be for a 3,000kg car if 3,000 N of force are applied when the car is traveling 10 m/s?
asked by yolanda 
chemistry
In the redox reaction: 4NH3(g)+3O2(g)>2N2(g)+6H2O(l) the number of moles of electrons transferred is...
asked by Metia 
statistics
Find the number of words formed by permuting all the letters of the word INDEPENDENCE such that the E's do not come together.
asked by guitarman 
chemistry
Calculate the cell potential of a cell operating with the following reaction at 25°C, in which [Cr2O72‾ ] = 0.030 M, [I ‾ ] = 0.020, M, [Cr3+ ] = 0.20 M, and [H+ ] = 0.60 M. Cr2O72(aq) + 6 I ‾(aq) + 14 H+(aq) → 2Cr3+(aq) + 3 I2(s) + 7 H2O(l)
asked by Long 
math
Find the coordinates of the centroid of the regions bounded by the graphs of: i)y=x2+1,x=0,x=1 and y=0 ii)y+x2=6 and y+2x3=0
asked by islam 
Chem
If a sample of the radioactive nuclide 139Cs has an activity of 0.0730 Ci, what is the instantaneous rate of decomposition of 139Cs in terms of grams per second? The mass of 139Cs is 138.9134 amu. (1 Ci = 3.700 × 1010 disintegrations/s, 1 amu = 1.66054 ×
asked by Alicea 
5th grade maths
Choose a reasonable metric unit to complete each sentence and how did you do it. 1. 1 mile is about 1.6 2. 1 yard is about 1 Thanks
asked by MONA 
Gen. Chemistry
From these two reactions at 298 K, V2O3(s) + 3CO(g) > 2V(s) + 3CO2(g); DH° = 369.8 kJ; DS° = 8.3 J/K V2O5(s) + 2CO(g) > V2O3(s) + 2CO2(g); DH° = –234.2 kJ; DS° = 0.2 J/K calculate DG° for the following at 298 K: 2V(s) + 5CO2(g) > V2O5(s) + 5CO(g)
asked by Anonymous 
Geometry
I need to find the value of p in a right triangular prism when the surface area is 457.25. "P" is the distance between the bases The triangleular base is 9.9 x 6.2 choices are: 16.65 8.75 14.25 9.45 Thank youcould you explain how you got the answer
asked by LynAnne 
Math
"The probability of getting heads on a biased coin is 1/3. Sammy tosses the coin 3 times. Find the probability of getting two heads and one tail". I thought that all you have to do is: (1/3)(1/3)(2/3) It makes sense to me, but it's not right...
asked by Stuck 
general physics
A window washer pulls herself upward using the bucketpulley apparatus shown in the figure . The mass of the person plus the bucket is 63 kg. How hard must she pull downward to raise herself slowly at constant speed?
asked by Anonymous 
equations trig
2cos^2x3sinx=0
asked by LiNnda 
Health (Anonymous)
Could you be a little more specific as to which ones I missed so I can research them further. Thanks.
asked by B B 
social studies
what tools did egyptians use to bulid pyramids
asked by james 
equations trig
8sin^2x+sinxcosx+cos^2x=4
asked by LiNnda 
Chemistry
What is the highest number of bonds that one Carbon atom can make? 4 3 2 1 I'm thinking four but I probably am wrongI'm not great at chemistry but I'm trying Thank you
asked by Sara 
chemistry
The amount of lactic acid, HC3H5O3, produced in a sample of muscle tissue was analyzed by reaction with hydroxide ion. Hydroxide ion was produced in the sample mixture by electrolysis. The cathode reaction is given below. 2 H2O(l) + 2 e ‾ → H2(g) + 2
asked by Long 
Chemistry
Which compound is a saturated hydrocarbon? ethane ethene ethyne ethanol Thanks for any help you can give
asked by Jillian 
chemistry
Given: Cr3+(aq) + 3e¨C ￼ Cr(s); E¡ã = ¨C0.74 V Pb2+(aq) + 2e¨C ￼ Pb(s); E¡ã = ¨C0.13 V What is the standard cell potential for the following reaction? 2Cr(s) + 3Pb2+(aq) ¡ú 3Pb(s) + 2Cr3+(aq)
asked by Anonymous 
Math
Two pieces of cake weigh as much as one apple and one cherry. One apple weighs as much as five cherries and one piece of cake. How many cherries weigh as much as one apple?
asked by Mia 
websiteaddress
One of my favorite home pages is coming up 404 URL Not Found on this server and it has never done that before. Could an Internet savvy person point out why this could be happening? Could just this particular place be experiencing technical difficulties?
asked by SurferDude 
Physics for Life science
1. A block of mass m=100kg rests on a level ground. With what force, parallel to the ground, must you push the block so that it is just ready to start sliding? The coefficient of static friction between the block and the ground is 0.40.
asked by TangenT 
CHEMISTRY
What substances will increase the molar solubility of nickel(II) phosphate in a saturated solution?
asked by Anonymous 
chemistry
What is DG° at 298 K for the following equilibrium? Ag+(aq) + 2NH3(aq) ￼ Ag(NH3)2+(aq); Kf = 1.7 × 107 at 298 K
asked by Anonymous 
foundations of business
Consider a local business whose services you frequently use. What are the main components of this company's business model? describe the three components of the business system that comprise the local business you selected.
asked by dana 
algebra
for the system of inequalities y >= 2x  1 and y = 2x  1, but not y
asked by tim 
Chemistry
2H20(l) = 2H2 (g) +O2 (g) For the above, if 1.50 mg of water is decomposed, what mass of hydrogen is procduced? (1 Mg=10^6g=1 metric ton)? What is the answer and what is the best way to solve this?
asked by Carli 
chemistry
What is the difference between a strong electrolyte and a weak electrolyte? Explain what makes an electrolytic solution strong or weak. Do you look at the pH to determine between a strong electrolyte and a weak one?
asked by Anonymous 
college
. S35 (t1/2 = 87.4 d) is used in cancer research. The biological halflife in the human body is 90 days. What is the effective halflife of S35?
asked by kurt 
physics
Imagine an airplane flying under a cloud during a thunderstorm.Do the passengers get electrocuted? Explain why or why not. Should the airplane's wheels be insulators or conductors? Explain why.
asked by Sandhya 
12th grade Project work
How can I prepare a beautifully decorated hand made file on a project work for school?
asked by Vishesh 
civics
why would a person want to go to federal court instead of state court?
asked by Landon 
college physics
How fast (in rpm) must a centrifuge rotate if a particle 9.50 cm from the axis of rotation is to experience an acceleration of 113000 g's? Need help please.
asked by peyton 
office procedure
you can place overseas calls directly if your company has the proper connection for
asked by peg 
English
Can you please help me rephrase a sentence taken from Virginia Woolf's Mrs.Dalloway? "And there the motor car stood, with drawn blinds, and upon them a curious pattern like a tree, Septimus thought, and this gradual drawing together of everything to one
asked by Franco 
algebra
quan is shopping. he can buy 2 pants and 1 shirt for $79.85 (before tax is added). he can but 1 pair of pants and 2 shirts for $69.85 (before tax is added). how much does a shirt cost? a)$29.95 b)$10.50 c)$19.95 d)$5.50 and the answer that i picked is b
asked by wan 
radicals
I don't know how to do this type of problem: 6 radical 3(5 radical63 radical 10 ) I need help fast
asked by Ales` 
college physics
A 915 kg twostage rocket is traveling at a speed of 5.50×10^3 m/s with respect to Earth when a predesigned explosion separates the rocket into two sections of equal mass that then move at a speed of 4.00×10^3 m/s relative to each other along the
asked by peyton 
Science
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.
asked by Dee 
science/math
sandy made a drawing of a rec tangle to show the area of the library. what is the area ,in square yards of the library? what stands for (1) square yard
asked by johnathan 
Science
Who should share the mineral profits from the Pacific Ocean? From The Alantic Ocean?
asked by Kristine 
social studies
what is canada's gdp and what is japan's gdp ? please answer this question. thank you:) ^^ :) :) ^^
asked by binah 
Algebra II
If Peter received grades of 88,83,75,and 80 on four tests in English, what is the minimum grade he has to score on the fifth test to have an average of at least 85 for the course?
asked by bev 
math sci
how can 36 stand for 1 square yard
asked by johnathan 
businee
Explain how sociocultural differences create problems for Walt Disney in opening parks overseas
asked by amy 
Science/ Math
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.
asked by Dee 
american history
what principle was ocerturned in Brown v Board of education?
asked by cornelius 
7th grade
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.
asked by Dee 
Chemistry
Is it possible to determine the Ka of a weak acid at points other than the halfway point of a titration? Explain.
asked by Andrew 
machanics\
can u tell me what formula i should be using to answer this question? If a stone falls past a bird on a ledge moving at 4 m/s, how fast will the stone be movingjust before it hits the ground below 9 seconds later? A. 92.2 m/s B. 48.2 m/s C. 352.8 m/s D. 36
asked by me 
marketing
The process of naming broad productmarkets and then segmenting them in order to select target markets and develop suitable marketing mixes is called:
asked by pri 
Math
When trying to solve arctan(sqrt 567.2 / 459.6) my answer was 2.96. My teacher said that i handled the radical wrong. She said I have to square both numbers, then add them, and then find the square root. I am confused because you cannot take the square
asked by Abbey(Please help) 
statistics
a.A normal distribution is any distribution that is not unusual
asked by Mercede 
busines
Ethically, would it be fair to pay U.S. employees who are relocated overseas a different wage than local employees receive? Please justify your position
asked by amy 
business
Is it a good idea to open American fast food restaurants in Disney parks overseas selling the same kind of food sold in U.S. parks? Why or why not?
asked by amy 
Chemistry [Science]
Oh gosh... I need help, with like everything... [Show all work] Aluminum nitrite & ammonium chloride react to form aluminum chloride, nitrogen gas and water. What amount of aluminum chloride is present after 43g of ammonium chloride have reacted
asked by Nikki 
Chemistry
A characteristic of benzene is which of the following? C6H6 aromatic planar all of the above I think it is all of the above but I'm not sure Thank you for the assistance
asked by Tim 
DIVERSITY IN THE CLASSROOM
Create a 12 to 15slide Microsoft® PowerPoint® presentation addressing the following points: o Explain ways to debunk three of the five gender misconceptions listed above based on the results of the peer discussion and your own University Library
asked by scooby 
algebra IIURGENT
the perimeter of a rectangular yard is 270 feet. If its length is 25 feet greater than its width what are the dimensions of the yard
asked by bev 
physics
in an adiabatic process from A to B, do A and B have same temperature?
asked by eng 
algebra
Which point is a solution of the inequality 1/2x  4y
asked by letes 
Chem
Which of the following substances will increase the molar solubility of nickel(II) phosphate in a saturated solution? Na3PO4 HNO3 NH4Cl (NH4)3PO4 KOH
asked by Anonymous 
physics
A spherical convex mirror has a radius of curvature of magnitude of 20cm. At what distance from the mirror should an object be placed to obtain an image that is virtual, four times smaller and upright.
asked by jane 
Math; Pre algebra
How many 3 letter arrangements can you make while making the first and the third letter one of the 21 constants and the middle letter one of the 5 vowels {a,e,i,o,u} . {two such arrangments to use are KOM and XAX?
asked by dora 
Chemistry
If you needed 2.50g of CuSO4 for a reaction but only had CuSO4 * 5H2O available, how many g would you need to use to get the same number of moles of CuSO4?
asked by Danny 
math
Find a rule. Write the rule as an equation. Input X 12, 47, 9 Output Y 32, 67, 29 Rule:____________ Equation:_______________
asked by Levi 
Math
Write an expression for the most apparent nth term of the sequence. Assume n begins with 1. 3,7,11,15,19 My answer was an= 3 +4n but this wrong.
asked by Abbey(Please help) 
10th grade
x squared13x+36/x9 equals what dividing polynomials
asked by darion 
math
of 28 and a quotient of 8?
asked by erin 
trig
Can someone please help me solve this equation? Solve the equation in the interval [0°, 360°). csc θ = 1 + cot θ
asked by Dee 
Business Statistics
For H0: ¦Ð ¡Ü .60 versus H1: ¦Ð > .60, ¦Á = .05, x = 56, n = 80 how do i find the test statistic and pvalue?
asked by John 
Chemistry
A characteristic of benzene is: C6H6 aromatic planar all of the above I think it is all of the above but I'm not sure Thank you for the assistance
asked by Tim 
math
of 28 and a quotient of 8 ?
asked by erin 
Chemistry 102
For a question like “calculate the pH of an aq.solution that is 1.0 M CH3COOH and 1.0 M CH3COONa, how do you know to write the equation like this: CH3COOH + H2O => H3O+ + CH3COO and not like H3O+ + CH3COO => CH3COOH + H2O for the ICE chart. This would
asked by Nick 
social studies
what are Canada's natural resources and what are japan's natural resources?Please answer this question.Thank you:):):):):):)^^ ^^ ^^ ^^
asked by binah 
Math
Shirley has 18 coins. One sixth of the coins are quarters, one third of the coins are dimes, and one half of the coins are nickels. What is the value of Shirley's coins?
asked by Mia 
social studies
what are Canada's natural resources and what are japan's natural resources?Please answer this question.Thank you:):):):):):)^^ ^^ ^^ ^^
asked by binah 
Science/ Math
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.
asked by DeeDee 
Chemical Kinetics
The kinetics of the catalytic decomposition of NH3 into N2 and H2 on a hot tungsten filament at 1100 °C was investigated by Kunsman. He measured the times (t1/2) required for half of NH3 to decompose at different initial NH3 pressures, as shown below: P
asked by Teddy 
Calculus math
integral of (2x) / [(x+2)(x+1)]
asked by Zack 
chemistry
An aqueous solution contains 38.6 g NaCI per 155 mL of solution. This solution is _________.
asked by Jim 
trig
verify: cot(t)+csc(t)/sin(t)=1/1cos(t)
asked by cj 
Chemistry
a sample of gas is warmed from 15.o degrees celsius to 45.o celcius at a constant pressure. its initial volume is 1.75 liters. what is the final volume of gas?
asked by Adina 
Trig
How do i set this trig problem up? PLEASE help me. Find tan (s + t) given that sin s = 1/4, with s in quadrant 2, and sin t = 1/2, with t in quadrant 4.
asked by Dave 
Computers/Excel
You wish to calculate the commission on sales. The commission is 6% on all sales that are at least 20% above cost.
asked by Jamie 
Science/ Math
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.
asked by Pittsburgh Pa 
Physics
Which is more harmfulsmaller wavelength, like gamma ray, or larger wavelength, like radio waves?
asked by Emily 
college chemistry
The halflife of 13252Te is 3.26 days. This isotope decays by beta emission to a highly unstable intermediate that decays rapidly to a stable product by beta emission. (a) What is the ultimate product obtained from Te132? Write a balanced equation for
asked by brody 
PHYSICS
Three small spheres are placed at fixed points along the xaxis, whose positive direction points towards the right. Sphere A is at x = 23.0 cm, with a charge of 10.00 ìC. Sphere B is at x = 55.0 cm, with a charge of 2.00 ìC. Sphere C is at x = 57.0 cm,
asked by Jay 
Chem 1LC
Could someone please help me with this problem!!?!? Thanks you so much!!! The reduction potentials for the species involved in an electrochemical cell are as follows: M+ + e– M is 0.50 V J+ + e– J is 1.20 V. All solutions are 1.00 M and J+ J is
asked by Alex 
3rd grade
of 28 and a quotient of 8?
asked by erin 
social studies
Two questions... 1. What held office for one year to prevent abuses of power? 2. What keeps one part of a government from becoming too strong?
asked by Hannah 
Hydrogen Bonding
The longer the hydrogen bond, do the Intermolecular Forces increase or decrease. So if molecule A has a Hbond with a length of 1.7 A and molecule B has a Hbond length of 1.8 A would molecule A or molecule B have a stronger IMF? It would seem that the
asked by ChEm 
math
How many 3 letter arrangements can you make while making the first and the third letter one of the 21 constants and the middle letter one of the 5 vowels {a,e,i,o,u} . {two such arrangments to use are KOM and XAX?
asked by chidora 
calculus
Find the value of the limit.( use L'hospital rule) lim (tanx/x)^(1/x^2) x>0
asked by Yen 
Chemistry
Whether A dissolves in B depends on a [imbalance, balance] between favorable entropy and favorable enthalpy. One of the two phrases in the brackets is correct, I don't know which it is. Can someone tell me and explain why? Please and thank you.
asked by Ana 
economics
Suppose velocity is stable, What would the Federal Reserve need to know in order to keep output at its natural level following a supply shock?
asked by ben 
math
Evaluate the integral S (range from 1 to 3) (x^2 +1)dx by computing the limit of Reimann Sum.
asked by Jen 
algebra
Together, Jared's age and his grandfather's age total 100. But Jared's grandfather is 70 years older than him. How old is Jared's grandfather?
asked by tim 
english
what are some of the things someone should consider when or before voting for a particular government or party at election time? please help me.
asked by jameela 
math
8 = 2^5x * 4^x^2 In case I didn't write it correctly, it is 8 equals 2 to the 5x times 4 to the x squared
asked by Cindy 
CHEMISTRY
From these two reactions at 298 K, V2O3(s) + 3CO(g) > 2V(s) + 3CO2(g); DH° = 369.8 kJ; DS° = 8.3 J/K V2O5(s) + 2CO(g) > V2O3(s) + 2CO2(g); DH° = –234.2 kJ; DS° = 0.2 J/K calculate DG° for the following at 298 K: 2V(s) + 5CO2(g) > V2O5(s) + 5CO(g)
asked by Anonymous 
accounting
can anyone help me with accounting
asked by tru 
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
asked by Maggie 
Chem
Given: Al3+(aq) + 3e– ￼ Al(s); E° = –1.66 V Cl2(g) + 2e– ￼ 2Cl–(aq); E° = 1.36 V What is ∆G° for the following cell reaction? 2AlCl3(aq) ￼ 2Al(s) + 3Cl2(g)
asked by Anonymous 
Chemistry
Hi, this is a reply to the question I asked earlier. I asked about the classification and functional group of an organic compound. It has bonds between HCCH. Off of each Carbon is single bonds of Hydrogen above and below. making a total of 6 Hydrogens
asked by Julia 
L.A
Could someone help me interpret this poem?Thanks Nature's first green is gold, Her hardest hue to hold. Her early leafs a flower; But only so an hour. Then leaf subsides to leaf. So Eden sank to grief, So dawn goes down to day. Nothing gold can stay.
asked by Shadow 
algebra
for the system of inequalities y >= 2x  1 and y = 2x  1, but not y
asked by tim 
English
This is one sentence which I am having a bit difficulties on. It contains too much wordiness from my outlook. Proper sitting and standing are very crucial factors in having a healthy back. Does this make better sense? Sitting and standing properly are
asked by Sara 
7th grade
If one person leaves at 65 mph and another leaves at 70 mph 5 minutes laterwhere do the come together at the same point?
asked by mary 
physics
A .545kg ornament is hanging on a .75m uniform board, with mass .22kg above a babies crib. the ornament is .35 m from one end. Each end is supported by a wire. Calculate the tension in the two wires.
asked by Maira 
English
1. Is it too late to call him. (What does 'it' refer to in the sentence? Weather?)
asked by rfvv 
Physics
An athlete twirls a 1 kg hammer tied to the end of a 1.3 m rope in a horizontal circle the hammer moves at the rate of 1.0 rev/sec. (a)what is the centripetal acceleration of the hammer? (b) what is the tension in the rope?
asked by Anna 
English
I have to write a poem about my childhood and here it is. My childhood was full of people with tender hearts who followed me like my shadow wherever I went; Whether it be a long walk or short; they'd be with me. In those days life seemed to pass slowly and
asked by Sara 
Physics
In a cyclotron, an electromagnet exerts a force of 7.50x1013N on a beam of protons. Each proton has a mass of 1.67x1027kg. The electromagnet causes the protons to travel in a circular path of radius 1.20m. What is the velocity of the proton beam?
asked by Elvia 
math
3.75qt= qt c
asked by emma 
Physics
A 75 kg pilot flies in her plane in a loop and notices that at the top of the loop, where the plane is completely uspside down for an instant, she hangs freely in her seat. the airspeed indecator reads 120m/sec. (a)what is the radius of the planes loop?
asked by Maira 
Physics for Life science
1.Since action and reaction are exactly equal and oppositely directed, how is ever possible for a net force to be acting on the body?
asked by Simeon 
Physics
Two bowling balls each have a mass of 6.8kg. the speres are located nest to one another with their centers 21.8 cm apart. what gravitational force do they exert on each other?
asked by Lorena 
Matt 116
Suppose that the x is years and the y is some measured value in the real world
asked by Anonymous 
health
identify specific examples of how the roles you play with family and friends differ from those you play in other social groups.
asked by sam 
Physics
Using the fact that a 1.0 kg mass weighs 9.8N on the surface of the earth and the radius of the earth is roughly 6.4x10^8m. calculate the mass of the earth.
asked by Hannah 
world history
the question is: Why is England and France developing into nations important to us? i need websites where i can get information on this please
asked by trixie 
Physics
A train is sounding a horn of constant frequency shows down as it nears a station. What change in pitch is heard by a commuter standing in the station?
asked by Sylvia 
Physics for Life science
1. Two peopleone twice as heavy as the other one, play tugofwar with a 12m ideal rope while standing on a frictionless ice surface. Would any of them move and if he does, how far? Explain why?
asked by Simeon 
childcare
which one of the following lunches provide a variety in both color and texture? A.Egg salad sandwhich, applesauce,celeery hearts,milk b.Egg salad sandwhich,Banana slices,buttered squash,milk c.Egg salad sandwhich,raisins,wax beans,milk d.Egg salad
asked by Nicole 
Science/Math
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.
asked by Please help! 
Physics for Life science
1.You are riding on a 20m diameter Ferris wheel. when your cart is at the bottom, you feel twice as heavy as you normally are. what is the speed of the wheel?
asked by Simeon 
Algebra II
(103i)(7+6i)
asked by Lisa 
Economics
no idea what to do guys, little help please 11. Answer the next three questions on the basis of the following production possibilities data for Francia and Galacia. All data are in tons. Francia production possibilities: A B C D E Soup 60 45 30 15 0 Nuts 0
asked by Kyle 
chemistry
Given: H2 (g) + O2 (g) ⇌ H2O2 (g) K = 2.3 x 106 at 600 K 2 H2 (g) + O2 (g) ⇌ 2 H2O (g) K = 1.8 x 1037 at 600 K Calculate Gº for the following reaction: H2O (g) + 1/2 O2 (g) ⇌ H2O2 (g)
asked by Claire 
business technology
what are the positives and negatives that globalization brings to the u.s.a and to other countries?
asked by Anonymous 
phisycal science
if 1.5 of ethanol is 37 degree celcious, what is the final tempereature when you add 80000 joules
asked by Anonymous 
physics for life sciences
since action and reaction are exactly equal and oppositely directed how is it ever possible for a net force to be acting on a body?
asked by sarah 
Chemistry
How could i determine the apparent molal concentration of BaNO3 when the freezing point of the aqueous solution is 2.65 degrees Celcius
asked by Lexi 
Math
3/y+2 over 7/y4 can u please show me the steps on how you got the answer. Thank You
asked by Scott 
Physics for Life science
1. A block of mass m=100kg rests on a level ground. With what force, parallel to the ground, must you push the block so that it is just ready to start sliding? The coefficient of static friction between the block and the ground is 0.40.
asked by TangenT 
nutrition
I got a case study about a woman with ulcerative colitis and i need help finding information on UC and prednisone and sulfasalzine from .o r g cites , im not allowed to use .c o m cites . its stupid. help please
asked by laurel 
Physic
If you shout across a canyon and hear the echo 0.57 s later, how wide is the canyon?
asked by Lua 
sicence
since action and reaction are exactly equal and oppositely directed,how is it possible for a net force to be acting on a body?
asked by The Ab 
chemistry
Question 26A student completes a titration by adding 12.0 milliliters of NaOH(aq) of unknown concentration to 16.0 milliliters of 0.15 M HCl(aq). What is the molar concentration of the NaOH(aq)?
asked by frnk 
Chemistry
Consider a 790mL container at 21 °C in which the pressure of argon is 1.98x106 Pa. a) What mass of argon (in g) is present in this container? b) How many molecules is this?
asked by write2khin 
chemistry
What is the concentration of silver(I) ion in a saturated solution of silver(I) carbonate containing 0.0092 M Na2CO3? For Ag2CO3, Ksp = 8.6 × 10–12.
asked by Anonymous 
Science
Does the container ,size minutes and time different , to freeze cold water and hot water? And why?
asked by Sergio 
english
is this sentence clean she buyed some dounuts from the shop she boght some donuts from the shop.
asked by Emma 
Math
"In vase A, there are 3 red balls and 5 white balls. In vase B, there are 6 red balls and 4 white balls. Two balls are to be drawn at random, without replacement, from each vase. What is the probability of selecting 4 red balls?" (Answer: 1/28) So I
asked by Stuck 
chemistry
What is DG° at 298 K for the following reaction? Pb(s) + PbO2(s) > 2PbO(s) Substance DG°f (kJ/mol) at 298 K PbO(s) –187.9 PbO2(s) –217.3
asked by Anonymous 
physics
Imagine an airplane flying under a cloud during a thunderstorm.Do the passengers get electrocuted? EXPLAIN WHY or WHY NOT. Should the airplane's wheels be insulators or conductors? EXPLAIN WHY.
asked by Sandhya 
math
A bicycle wheel has a diameter of 26 inches. About how far will it travel in one revolution?
asked by nancy 
Chemistry
What is the change in entropy when 0.290 g of silicon is burned in excess oxygen to yield silicon dioxide at 298 K? Si(s) + O2(g) > SiO2(s); ÄS° = –182.4 J/K at 298 K
asked by Anonymous 
English Quick ?
Is the grammar in this sentence correct and does it sound alright. Its a piece from my research paper. To give the roof that authentic Cotswold style, stone shingles, which grew smaller and smaller as they ascended toward the peak, were imported from
asked by Kayden 
Chemistry
Whether A dissolves in B depends on a [imbalance, balance] between favorable entropy and favorable enthalpy. One of the two phrases in the brackets is correct, I don't know which it is. Can someone tell me and explain why? Please and thank you.
asked by Ana 
chemistry
Consider the following reaction: 3C(s) + 4H2(g) > C3H8(g); DH° = –104.7 kJ; DS° = –287.4 J/K at 298 K What is the equilibrium constant at 400.0 K for this reaction?
asked by Anonymous 
Geometryconfused!
Find the length of a side of a rhombus whose diagonals measure 10 and 24?
asked by Rosie 
Chemistry
a volume of 50mL of a standard HCl solution is needed to neutralize 50 mL of 1x102 M NaOH. what volume of this HCl solution is needed to neutralize 50 mL of 1x102 M Ba(OH)2
asked by Bianca 
Math Analysis
Find the exact value of cos(x/2) if sin x = 3/4 and x is in quadrant II. ==> I got ã(4ã7)/2. Is this correct?
asked by Emily 
british literature
DESCRIBE THE TONE OF "THE WANDERER."
asked by tiffany 
algebra
Not sure where to go next. I need to solve this quadratic equation 7x^25=0. This is what I have so far, not sure where/what to do next x=2/7 x=sqrt2/7 or x=sqrt2/7* =+/sqrt2/7 +/sqrt14/7 not even sure if this is right.
asked by dani 
geometryPLEASE CHECK AND HELP DUE TODAY
1. Refer to the following line m: b. Name two rays on m that have endpoint B. d. Find a simpler name for the intersection of rays BA and AC the line m has points a b and c going on across like that on the line would the answer be ba and bc? what would the
asked by jessica 
Math
Find the center, vertices, foci, and eccentricity of the ellipse. 9x^2 + 4y^2  36x + 8y + 31 = 0 My answer was: center=(2,1) v=(2,10)(2,10) f=(2,11)(2,11) e=11/3 Where did I make a mistake?
asked by Abbey(Please help) 
statistics
Distance travelled in a week by sales staff employed by nationwide security firm is approximately normally distributed with a mean of miles and standard deviation of 48 miles. Estimate the percentage of staff who in a week travel less than 80 miles
asked by Anonymous 
English
Can you check these sentences for me, please? Thanks a lot. 1) Can you say "he prefers working on his own rather than in a group?" or the only possible form is "He prefers working on his own to working in a group?" 2) It is a superb summer’s day between
asked by Franco 
algebra
5x  5y = 6 5/2x  5/2y = 6 a) (2,2) b) (2,2) c)none d)infinite number of solutions and the answer i picked was c thanks
asked by candy 
statistics
Distance travelled in a week by sales staff employed by nationwide security firm is approximately normally distributed with a mean of 200 miles and standard deviation of 48 miles. Estimate the percentage of staff who in a week travel: 1. a)less than 80
asked by Ash 
chemistry
Explain why the rate of a simple chemical reaction such as NO(g)+1/2O2(g)=NO2(g) is likey to be most rapid at the beginning of the reaction.
asked by Kim 
Chemistry
To form a molecule with a trigonal bipyramidal electron geometry, what set of pure atomic orbitals must be mixed? The answer is one s, three p, and one d. How do you figure this out?
asked by Danielle 
chemistry
What is the pH of the solution created by combining 12.90 mL of the 0.10 M NaOH with 8.00 mL of the 0.10 M HC2H3O2?
asked by jc 
To Writeacher
Writeacher, can you please have a moment to look at my previous English post. Thank you very much in advance:)
asked by Sara 
English
How do you prove that a view of society in a book is more interesting than another book using a narratology element? How do these connect through characters? If the character personifies this view of society how does this make the book interesting?
asked by Artemis 
trig
Please help me solve this problem. I have a test tomorrow and I do not understand at all. Determine all solutions of the equations in radians. Find cos x/2, given that cos x = 1/4 and x terminates in 0 < x < π/2.
asked by Mandy 
English
I have to write my cure for an "ill" that plague teenagers. This one poem provides a good example of what I'm trying to do. I t is calles Scrawny's surfire ance cure. The plague in it was zits, and the cure it suggested was First apply a cloth dipped in
asked by Sara 
Math
Find an equation of the ellipse with its center at the origin. center(0,0) foci(2,0)(2,0) major axis=8 My answer is x^2/16 + y^2/15 = 1. Is this correct?
asked by Abbey(Please help) 
Chemistry (Stoichiometry)
what mass of so2 is produced from the reaction between 31.5g of s8 and 8.65g of o2? I know how to find the limiting reagents and all but I need a little help knowing how to find the mass of the product.
asked by Jill 
Chemistry
2. Olive oil is almost pure triolein (a molecule). The molar mass of triolein is 885 g/mol. How many olive oil molecules have you got in 500g of olive oil?
asked by Jimbo 
chem
n2 g 3h2 g 2nh3 g + 22,000 cal Explain how the equilibrium is shifted when more nitrogen is added?
asked by sam 
Math
I have a TI83 graphing calculator. How do you graph a polar equation on this calculator. Also how would I graph lim 5/x2 x>2 in order to find the limit?
asked by Abbey(Please help) 
Chemistry
If 1.88 g of copper(II) chloride dihydrate is reduced by Mg(s), what is the minimum mass of Mg(s) required for this reduction? my work CuMg > Cu(s) + Mg molecular weight= 170.482 CuCl2 . 2H2O 1.88/170.482 = 0.01103 mol CuCl2 . 2H2O =0.01103 mol Mg
asked by Anonymous 
MathReiny
I posted this problem earlier and you answered it for me. The teacher said the correct answer is 3+2y/74y. How is that the answer. Below is what you did earlier 3/(y+2) / (7/y4)) = 3/(y+2) * (y4)/7 = (3y12)/(7y+14) or 3(y4)/[7(y+2)]
asked by Scott 
9th grade
at the top of a hill a rollercoaster has 67,500j of kinectic energy and 290,000j of potential energy. gradually the rollercoaster comes to a stop due to friction. If the rollercoaster has 30,000j of potential energy when it stops, how much heat energy is
asked by robbie 
Chemistry
To raise the temperature of 5 kg of water from 20 0C to 30 0C, a 2kg iron bar is heated and then dropped into the water. What should the temperature of the bar be (ciron = 0.46 kJ/kg 0C)
asked by Joshua 
Environmental Science
For my environmental science reseaerch paper on coral reefs I wanted to copy this intro paragraph from my workbook: Coral reefs are the second richest ecosystem or interdependent environment on Earth. They have been called the rain forests of the oceans
asked by y912f 
Chemistry
3. How many molecules are in 1 L of water (assume that the density of water is 1g/ml)? (5 marks)
asked by Jimbo 
English
Thank you very much for correcting my sentences. As I changed a few things, I wanted you to have a look at them. 1) It is a superb summer’s evening between six and seven. The episode takes place at Mulberry’s the florists in Bond Street, London. 2)
asked by Franco 
College Health
No one seems to want to help me. I just need to find out which questions I did not answer right so I can go back and correct them. 1 The process of breaking a complex substance down into smaller components is called? A neutralization B metabolism C
asked by Anonymous 
English
I forgot to include these sentences. I hope you can see them as well. 1) Septimus Warren Smith, a World War I veteran suffering from shell shock, is described as a man in his thirties with an apprehensive expression. 2) He has got a pale face, a beak nose
asked by Franco 
college chem
S35 (t1/2 = 87.4 d) is used in cancer research. The biological halflife in the human body is 90 days. What is the effective halflife of S35?
asked by Anonymous 
Chemistry
What is the pH of the solution created by combining 12.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH pH w/HCl pH w/HC2H3O2 12.20 =================================== my work: 0.000420 moles
asked by Amphee 
Life orientation
Provide recommendations on how to address the topic that you identified in the previous question.
asked by Priscilla Motsamai 
chemistry
at what temperature would the sloubility level of 50 g KCL in 100 g H2O?
asked by Kirby 
math analysis
How o you solve 4sinxcosx=1 ???
asked by anonymous 
chemistry
What does a high Boltzmann Distribution value indicate?
asked by anonymous 
math
How many pounds of Acid Per inch? If you have a tank that’s 51ft 0 in. long by 4ft 7 in. wide, and need to fill it to the two inch mark with hydrochloric acid, how many pounds are you putting in it? (Hint 1 gallon of acid weights 9.8 lbs.
asked by Nancy 
Math
How do figure out if a porabala is streched or compressed?
asked by Kristen 
Chemistry
What is the pH of the solution created by combining 2.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first diluted
asked by Ashley 
Chemistry
What is the pH of the solution created by combining 2.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first diluted
asked by Ashley 
Science
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.
asked by Please help! 
Chemistry
NH3(g) + 202(g) = HNO3(aq) +H2O (l) Is this reaction a combination, decomposition, single replacement, double replacment or other? Also is it redox or non redox?
asked by Al 
Science
Why might scientists want to figure out a way to promote cell division in mature nerve cells? There was no info about this in my text, which is why I posted this on here. I'll appreciate all the help you could give me, thanks
asked by Sara 
Chemistry
10% of a sample reacts in 25 s. If the reaction follows first order kinetics, how long would it take for half the sample to react?
asked by mandy 
Science
y do skinn cells reproduce quicker than other types of cells? I wrote: They reproduce quicker than other types of cells because they grow at a faster rate. Their rate in growing is very high. Any other inof would be greatly appreciated, thanks:)
asked by Sara 
Science
areas where cells might reproduce quickly, other than human skin is in the hair, mouth.... what others?
asked by Sara 
math
Fixed points of f? f(x) = x^2+13/12x  1/2 a) use algebra to find the fixed points and classify them. b) use the gradient criterion to determine an interval of attraction for one of the fixed points of f c) find exact values of the 2nd and 3rd terms of the
asked by Chamberlain 
Intermediate Algebra
how do you add or subtract rational expression with unlike demoninators Please explain
asked by Donald 
social studies
How long after the Albany Congress did the First Continental Congress Meet?
asked by rhon 
Health (Anonymous)
I have done all the leg work I was just wondering if some1 could let me know how I did is all. 1 The process of breaking a complex substance down into smaller components is called? A neutralization B metabolism C anabolism D catabolism Answer C 2 An
asked by B B 
english
use this words to write a little story...what, when, white, ship, shake, wish, them, then, think....
asked by shrey 
English
I'm extremely sorry for letting you check a sentence which didn't make sense at all. I hope you can have a look at them now. 1) Septimus Warren Smith, a World War I veteran suffering from shell shock, is described as a man in his thirties with an
asked by Franco 
chemistry
sandstone contains 30% by weight of CaCO3, and the remaining is SiO2. 1g is dissolved in 200ml of 1 mol per litre of HCL...what will the concentration of calcium in the solution?
asked by wills 
chemistry
sandstone contains 30% by weight of CaCO3, and the remaining is SiO2. 1g is dissolved in 200ml of 1 mol per litre of HCL...what will the concentration of calcium in the solution?
asked by wills 
Statistics
Distance travelled in a week by sales staff employed by nationwide security firm is approximately normally distributed with a mean of 200 miles and standard deviation of 48 miles. Estimate the percentage of staff who in a week travel: 1. a)less than 80
asked by Laretta 
english
what caused the decline of modernism?
asked by cristal 
Chemistry
NH3(g) + 2O2 (g) = HNO3 (aq) + H2O (l) How do I calculate the oxidation states of Nitrogen and figure out if it is reduced, oxidized or neither?
asked by Carli 
english
i need to write a story on earthquakes
asked by emilio 
Science
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.
asked by Please help! 
math
20/36 in simplest form
asked by jan 
science
on which of these do the phases of the moon have an affect? a.the season b.ocean tiders 3.day and night 4.weather
asked by kim 
To emilio
You liked my ending stanza. Do you have any suggestions onhow I could make it seem more imaginative?
asked by Sara 
North Hall
2x + 3y = 13 4x + y = 1
asked by Holly 
Algebra
what do you call a skydiver with the flu
asked by Pam's 
9th grade physical science
a the top of a hill a rollercoaster has 67,500j of kinetic energy and 290,000j of potential energy. gradually the roller coaster comes to a stop due to friction. if the roller coaster has 30,000j of potential energy when it stops, how much heat energy is
asked by robbie 
EnglishFor Jiskha Tutors
Can some of you please take a look at my previous English posts. They are all on this page, and I need all of them to be checked. Please and thank you:)
asked by Sara 
science
On which of these do the phases of the moon have an affect? a.the season b.ocean tide c.day and night d.weather
asked by kim 
4th grade science
on which of theseb do the phases of the moon have an affect? a. the season b.ocean tides c.day and night d.weather
asked by kim 
Math Analysis
Use the halfangle formula to find the exact value of cos(x/2) when tanx = 5/8 and x is in quadrant IV. ( is a radical) ==> I got sqrt((89 + 8sqrt(89))/178). Is this correct? I hope my answer is easy to read..
asked by Emily 
american history
Please check :) 1. How did the pattern of european immigration shift in 1890? A. from jewish to catholic B. From northern to southern and eastern europeans*** C. from eastern to southern europeans D. from eastern to western europeans 2. The massive
asked by made' 
Geometry
I need to find surface area of triangular prismdimension of base is 9.9 by 6.2 distance between bases is 14.6 choices are: 436.278 466.97 332.94 253.46 Thank you
asked by Julia 
Math
Simplify. 1.xy^2/xy 2.m^5np/m^4p 3.5c^2d^3/4c^2d 4.4c^2/24c^5 Are these the right answers?Thanks 1.xy 2.mnp 3.5/4cd^2 4.1/6c^3
asked by Shadow 
calculus
how do you simplify log5 square root pq over 8
asked by Ashley 
finance
Sony $4.50 preferred is selling for $65.50. The preferred dividend is non growing. What is the required return on Sony preferred stock?
asked by dre 
english
I need five animals out of this.geornniebsclkmroteclaoy
asked by anna 
Chemistry
How much water would you add to 50.0 mL of 0.700 M NaOH if you wanted the final concentration to be 0.300 M?
asked by Chemisty 
english
This is an inventor and his/her invention.cyrusmccormickreaper
asked by anna 
Science
Could someone please have a moment to look at my science posts as well; I want Jiskha tutors to help me with them, thank you very much for all the help you could give me:)
asked by Sara 
Physics question
A naked person with a surface area of 1.55 meters squared and a skin temperature of 37.3 degrees is in a sauna room at T = 82.0 degrees. The person's skin has an emissivity of 0.910. She evaporates sweat from her body to balance the rate of heat absorption
asked by Sarah 
Chemistry
what would the freezing point be for a solution of 0.87M aqueous ammonia? The density of this solution is 0.992g/cm3
asked by Chem 
statics
Using the 689599.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 689599.7 rule to find the following quantities: Suggest you make a drawing and label first…Drawings need not
asked by Anonymous 
algebra
Bob mosw his lawn in 3 hours, Jane can mow the same lawn in 5 hours. How much time would it take for them to mow the lawn together?
asked by jj 
chemistry:(....
what temperature would each of the following solubility be observed? a. 50g KCL in 100g H2O b. 100g NaNO3 in 100g H2O c. 60g KNO3 in 100g H2O
asked by Kirby 
6th grade science
I need help. Quick.I need an idea on how to do a science project that has to have somthing to do with types of energy,atmopsphere or life science. I only have 2 more weeks left. I need an idea. thanks :)
asked by gill 
Math algebra
I'm reposting this, because Mathmate's answer hasn't directed me to the WHY? part of the question. Any prompts appreciated. The product of any two (whole) numbers each of which leave a remainder of 1 on dividing by 7, also leaves a remainder of 1 on
asked by charlie 
6th grade science
I need help. Quick.I need an idea on how to do a science project that has to have somthing to do with types of energy,atmopsphere or life science. I only have 2 more weeks left. I need an idea. thanks :)
asked by gill 
To DrBob222
can you please have a moment to look at my other previous posts, thanks a lot:)
asked by Sara 
Intermediate Algebra
What is the meaning term rational expression. In your word and examples explain how to divide rational expressions
asked by rosa 
algrba
help me to sole these problem please, multiply 2(X3)
asked by jennifer 
college
if a sample of the radioactive nuclide 139cs has an activity of 0.0730 ci, what is the instantaneous rate of decomposition of 139cs in terms of grams per second? the mass of 139cs is 138.9134 amu. 1 ci 3.700 × 1010 disintegrations/ s, 1 amu 1.66054
asked by Anonymous 
trig
How do you solve for these identities: 1sin^2è/cosè= cosè sin^4ècos^4è=2sin^2è1
asked by Anonymous 
physics
An elevator in a tall building is allowed to reach a maximum speed of 3.0 m/s going down. What must the tension be in the cable to stop this elevator over a distance of 2.4 m if the elevator has a mass of 1500 kg including occupants? Need step by step help
asked by Anonymous 
algabra
what is the prime factorization of 420
asked by jennifer 
Chem
Which salt has the highest molar solubility in pure water? Cd(OH)2, Fe(OH)2, PbCrO4, CdCO3, Mn(OH)2
asked by V 
Chemistry
8. Hydrogen and oxygen gas combine explosively to produce water. Write a balanced chemical equation for this process. If 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced?
asked by Jimbo 
Trig
Find cos(s+t) if cos s= 1/2 and sin t= 3/5, s and t are in quadrant II. I got the answer to be 4/10 plus 3sqrt(3)/10. Is that right? Then a second problem was find sin (s+t) if sin s=2/3 and sin t=1/3, sin is in quadrant II and t in quadrant IV. I got
asked by Anonymous 
algebra
simplify: 1/4  (3/8)
asked by jennifer 
6th science
does any body have an idea on a science project to do with enrgy?
asked by g 
English
This is my Trombone Solo poem. Please see if it's good, thanks:) I like people Who gain knowldge from school; Not any kind of people, Silly ones or cruel. I like people possessing respect in their hearts, Thinking positively about others, And doing their
asked by Sara 
Chemistry
a)How much would the freezing point change in a 2.5m solution of phenol in benzene? (freezing point of phenol is 7.40 degrees C, freezing point of benzene is 5.12 degrees C) b)How much would the boiling point change in a 1.0m solution of magnesium chloride
asked by Danny 
algebra
juan is 8 years than his sister rosa. one day, he tells rosa that he is twice her age, but will only be twice her age for one year. to figure out how old juan and rosa are, you must first identify the conditions. what are the conditions in this problem? a)
asked by wan 
English
I have to describe Cyrano de Bergerac's physical traits but the only things I can find through Act III is his large nose, moustache, air of arrogance, and his white plume hatare there any more physical traitsI've spent the last half hour attempting to
asked by Janet 
Chemistry
Help please! I need to identify an organic compound and tell the functional group of the molecule the compound is singlebonded ,it is composed of a middle chain H,C,C,H. Off both carbons are single chains consisting of a H above and below each of the
asked by Julia 
chemistry
Does the application of heat to a substance always produce a chemical change? And give examples to support your answer.can someone help me?
asked by Jackie 
Intermediate Algebra
a male born in 1975 does not want his future wife to outlive him. What should be the year of birth for his wife so that they both can be expected to die in the same year? Find M(y)+F(y) to get the formula for life expectancy of a person born in year y 2 M
asked by Ganelle 
chemistry
Does the application of heat to a substance always produce a chemical change? And give examples to support your answer.can someone help me?
asked by Jackie 
English
I also have to describe Cyrano de Bergerac's personalityall I can think of that it is flamboyant,charismatic, poetically inclined, arrogant yet timid and fearful in love and holds true to his belief system to his own demise. Is any of that correct?
asked by Janet 
chemistry
Does the application of heat to a substance always produce a chemical change? And give examples to support your answer.can someone help me?
asked by Jackie 
math
how to do frequency tables 31
asked by sharrod