# Posts by amber

Total # Posts: 1,687

Statistics
Olive-Oil producers have expanded to approximately 120 producers statewide. Analysts estimate the average price consumers pay for a bottle of olive oil is \$21, with a standard deviation of \$2.40. What is the probability that the average price paid by a random sample of 36 ...

Physics
A satellite made of aluminum with mass 3500 kg travels on circulated path in 100 km height over the earth. Because of airresistance of the airveil the satellite loses energy and falls in a spiral down to earth. a) What is the mechanical energy of the satellite in the beginning...

Physics
A cylinder shaped buoy is stationary out on a lake. The height of the buoy is 1 m and the diameter is 30 cm and it‘s mass is 50 kg. Now a whale swims under the buoy and hit it. The buoy raises up and begins to oscillate. a) Find the total force on the buoy if the ...

Physics
A weight with mass m lies on a surface with no friction. The weight is also connected to a spring with springconstant k and then the weight is driven with outer force F(t)=F0sin(Ωt). There is a friction in the spring and he‘s described with –bv(t). With a help ...

chemistry
(a) A person drinks four glasses of cold water (3.0°C) every day. The volume of each glass is 2.5x10^2 mL. How much heat (in kJ) does the body have to supply to raise the temperature of the water to 37°C, the body temperature? (b) How much heat would your body lose if ...

Physics
A beam has a mass M and length L. A point mass m is located in distance d from the end of the beam and the point mass and the beam lies on the same line.a)Calculate the gravitational force of the beam on the point mass.b)Calculate the gravitational force on m from point mass M...

Social studies
What is outsourcing ?

Social studies
What is the answer ? Haha

Social studies
What does that have to do with my question ? Lol

Social studies
Before the first white person set foot in North America, it's people can be described most accurately as A) nomadic B) democratic C) multicultural D) homogenous I think it's either a or d but I'm not sure please help!!! By the way I searched nomadic it means "...

Physics
V= 4.31 x 10^-46 ?

Physics
Marie Curie first identified the element radium in 1898. She found that the radium-226 (mass 3.77x10^-25 kg) decays by emitting alpha particle (mass 6.64x10^-27 kg). If the alpha particle's speed is 2.4x10^6 m/s, what is the speed of the recoiling nucleus?

Math
11/4*1/4=11/16 11 * 1=11 4*4=16 steps 1. is you multiply 11*1 2. multiply 4*4 3. and that's how you get 11/16

Chemistry
Chemical analysis show that hemoglobin contains 0.34 percent Fe by mass. What is the minimum possible molar mass of hemoglobin? The actual molar mass of hemoglobin is four times this minimum value. What conclusion can you draw from these data?

chemistry
Benzene and cyclohexane molecules both contain six-membered rings. Benzene is a planar molecule, and cyclohexane is nonplanar. Explain.

Chemistry
Use the data in Table 15.3 (in the book Chemistry after Raymond Chang) to calculate the equilibrium constant for the following reaction: HCOOH(aq) + OH-(aq)= HCOO-(aq) + H2O(l)

Trig
Factor and simplify the expression. 1-sin^3 x

trig
Find tanx if sinx = 3/4 and x is in quadrant II.

calculus
How to factorise t3-8t2+16t?

calculus
How to factorise t3-8t2+16t?

Statistics
7. Give and interpret the 95% confidence interval for the hours of sleep a student gets.

math
what is 3z+(-10)=-19

college prep english
Ok so long story short I need help with homework......I have 3 questions on genre and its 2 genre's how do I know which one to write about ?

chemistry
An oxalic acid solution contains the following species in varying concentrations: H2C2O4, HC2O4-, C2O4^2-, and H+. Which of the above four species can act only as acids, which can act only as bases, and which can act as both acids and bases?

CHEM
The equilibrium constant for the reaction below is Kc = 9.1 10-6 at 298 K. 2 Fe3+(aq) + Hg22+(aq) 2 Fe2+(aq) + 2 Hg2+(aq) Calculate G when [Fe3+] = 0.21 M, [Hg22+] = 0.013 M, [Fe2+] = 0.022 M, and [Hg2+] = 0.020 M.

chemistry
1998 scientists using a special type of electron microscope were able to measure the force needed to break a single chemical bond. If 2.0 x 10^-9 N was needed to break a C-Si bond, estimate the bond enthalpy in kJ/mol. Assume that the bond had to be stretched by a distance of ...

chemistry
Most organic acids can be represented as RCOOH, where COOH is the carboxyl group and R is the rest of the molecule. (For example, R is CH3 in acetic acid, CH3COOH). (a) Draw a Lewis structure for the carboxyl group. (b) Upon ionization, the carboxyl group is converted to the ...

Geometry
a rectangle has an area of (2x^2 +12), a length of 9x+1) and a width of (3x-6). what is the value of x?

Algebra
If the formula R = -0.037t + 50.1 can be used to predict the world record in the 400 meter dash t years after 1925, for what years will the world records be 48.1 seconds or less?

chemistry
A student breaks a thermometer and spills most of the mercury (Hg) onto the floor of a laboratory that measures 15.2 m long, 6.6 m wide, and 2.4 m high. (a) Calculate the mass of mercury vapor (in grams) in the room at 20 degrees celcius. The vapor pressure of mercury at 20 ...

chemistry
If 10.00 g of water are introduced into an evacuated flask of volume 2.500 L at 65 degreed celcius, calculate the mass of water vaporized. (Hint: Assume that the volume of the remaining liquid water is negligible; the vapor pressure of water at 65 degrees celsius is 187.5 mmHg.)

chemistry
If 10.00 g of water are introduced into an evacuated flask of volume 2.500 L at 65 degreed celcius, calculate the mass of water vaporized. (Hint: Assume that the volume of the remaining liquid water is negligible; the vapor pressure of water at 65 degrees celsius is 187.5 mmHg.)

chemistry
Which of the following aqueous solutions would you expect to be the best conductor of electricity at 25 degrees celcius? Explain your answer. (a) 0.20 M NaCl (b) 0.60 M CH3COOH (c) 0.25 M HCl (d) 0.20 M Mg(NO3)2

Physics I
An Earth satellite moves in a circular orbit 770 km above the Earth's surface. The period of the motion is 100.0 min. What is the speed of the satellite? What is the magnitude of the centripetal acceleration of the satellite?

Physics I
A stone is projected at a cliff of height h with an initial speed of 48.0 m/s directed 60.0° above the horizontal. The stone strikes at A, 5.20 s after launching. Find the height, h, of the cliff. Find the speed of the stone just before impact at A. Find the maximum height...

what are the divisidles rules

what are the divisidles rules

Chemistry
the basis of oxidation number considerations, one of the following oxides would not react with molecular oxygen: NO, N2O, SO2, SO3, P4O6. Which one is it? Why?

Do you think that in the Post-Washington Consensus the developing world will be better off economically and politically

chemistry
A compound made up of C, H, and Cl contains 55,0 percent Cl by mass. If 9,00 g of the compound contain 4,19 x 10^23 H atoms, what is the empirical formula of the compound?

pre-calculus
Find the intercepts of the graph of x^2 + y^2 + 4xy - 2x + 7y = 8

English
We should either visit the art museum or attend a concert this weekend. Is this a parallel sentence?

applied math
how do you solve 2b+9=3

math
give expressions in the variable n, n ≥ 3 for the number of sugar cubes in the n*n*n cube with 0,1,2, or 3 painted faces, respectively

Chem
Is sea water close to being a saturated sodium chloride solution?

accounting
what is the journal entry if a owner of a company deposited \$15,000 in their checking account. In return they received 1000 shares of common stock in their corporation. The par value of the common stock is \$1 per share?

math
g(x)= 1-2x-3, x< or equal to 0. x-18, x>6 find g(6). so I used the first equation. 1/2(6)-3 and I got 0, but that's not the right answer so I'm not sure what I'm doing wrong.

Well I think she or he got 16 because 11+4 is,well 16 I think.

calculus
Recall that a function G(x) has the limit L as x tends to infinity, written lim(x->infinity)G(x) = L, if for any epsilon > 0, there exists M >0 so that if x > M, then |G(x) − L| < epsilon. This means that the limit of G(x) as x tends to infinity does not ...

calculus
sorry, i meant ln(1-x) in the first sentence

calculus
You are right my expansion was incorrect ln(x-1) = series of (x^n+1)/n+1 = x + x^2/2 + x^3/3 i don't know why your terms are negative though. After i multiply (x + x^2/2 + x^3/3) by (1 + x^2/2! + x^3/3!) = x + x^2/2 + (x^3/2! + x^3/3) = x + x^2/2 + 5x^3/6 I don't ...

calculus
the question asks to use power series though. So i found the power series of ln(1-x) = Series of nx^n-1 and for e^x is the series of x^n/n! i then found the first three terms of each ln(1-x) = 1 + 2x +3x^2 e^x = 1 + x^2/2! + x^3?3! after multiply them i got 1 + 2x + (X^2/2!+3x...

calculus
Use multiplication of power series to find the first three non-zero terms of the Maclaurin series of e^x ln(1 − x).

calculus
wait. aren't all the odd terms positive? since its (-1)^n-1? because if you sub n=3, it becomes (-1)^2, which is positive? And thank you once more. This was very helpful!

calculus
So, you're saying that when you separate an alternating series into two (odd and even) then the (-1)^n-1 goes away? And why did you make S1 negative, but not S2. And do i need to find the sum for S2 to answer the question? Because i only know how to find the sum of ...

calculus
im confused. I was taught that if it is an alternating series then you can only use the alternating series test to see if it was diverging or converging. And i did the alternating series test and all the conditions were met for each series separately.

calculus
Show that the series(−1)^n−1(bn) where bn = 1/(n^1/2) if n is odd and bn = 1/2^n if n is even, diverges. Why does the alternating series test fail?

phiisical science
Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3.

thermodynamic
A rigid vessel of 1m^3 contains steam at 20 bar and 400 degree C. the vessel is cooled until the steam is just dry saturated. Calculate the mass of steam in the vessel.

algebra
The perimeter of a square is equal to its area plus four. What is the measure of one side of the square?

Algebra II
Solve 1. 3x^2-9x=0 2. 12x^2+30x=-12 3. 9a(a+1)=4 4. 16x^2=25

Health Psychology
Ok, thank you. I believe I also need to add one more psychologist to the list, making it 5 different psychologists, but I was under the impression I only had to assign 1 job to each. Thank you for clearing this up for me. This helps so much to get a second out look. :)

Health Psychology
I want to make it clear that I do not want any answers to the project I am about to post on here. I only need help understanding it a little. I am trying to get online to speak with my professor but our school site is down at the moment. I think I know what I am doing, I just...

physics
a spring has a force constant of 20000 N/m how far must it be strectched for its potential energy to be 43 J??

college algebra
2/5(5x-3) - 1/3(12x-5). Have the correct answer but need someone to show me how to solve for it.

Algebra
Elena bicycles 4 km/h faster than Robert. In the same time it takes Robert to bicycle 27km/h, Elena can bicycle 39 km. How fast does each bicycle travel?

chemistry
Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: 2 NO(g) + O2(g) → 2 NO2(g), ΔH°rxn = ? Given: N2(g) + O2(g) → 2 NO(g), ΔH°rxn = +183 kJ 1/2 N2(g) + O2(g) → NO2(g), ΔH°rxn = +...

chemistry
According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 975 kJ of energy? SiO2(s) + 4 HF(g) → SiF4(g) + 2 H2O(l), ΔH°rxn = -184 kJ

chemistry
A 4.98 g sample of aniline (C6H5NH2, molar mass = 93.13 g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25 kJ/°C. If the temperature rose from 29.5°C to 69.8°C, determine the value of ΔH°comb for aniline.

If you roll two number cubes numbered 1-6, what is the probability of rolling the same number on each cube?

English
I need help writing a paragraph using these words. Retrospect, Inane, Squelch, Subsidize, and Lethargy.

biology
what school you go to

Chemistry
Given the equilibrium: CO + 2H2 = CH3OH H=-18.0kJ How will the concentration of CO at equilibrium be affected by the following? a) Adding more CH3OH b) Removing some H2 c) Reducing the temperature. I don't understand how i'm supposed to figure these out.. please help!

Chemistry 12
Why doesn't stirring not affect solution equilibrium??

Chemistry
OMG Doctor Bob you are a huge help! And you right i did have that a dozen times lol but i wasn't sure if i had it right because i couldn't het the last part to work out for me! But i have it now so thanks a bunch!

Chemistry
Balance the following redox equation by the oxidation number methode Ag + HNO3 = AgNO3 + NO + H2O I have all the oxidation numbers i just don't understand how i'm supposed to balance it according to them. I read the sites and i can't get it. Do i balance out each ...

english
Can you fix this sentence? "When the movie Star Wars premiered in 1977, it was both surprising and a revolution in its special effects."

chem
i have all the oxidation numbers for all the of elements but i don't understand how i'm supposed to balance the equation using the oxidation numbers. Do i have to to change the oxidation numbers to equation the same on each side?

chem
Balance the following redox equation by the oxidation number methode Ag + HNO3 = AgNO3 + NO + H2O

chem
How many grams of potassium permanganate (KMnO4) should be added to a 100 mL volumetric flask to prepare a 0.02505 M solution when the flask is diluted to the mark with water?

trig
how do you graph y=-(1/4)sin(3/4x+pi/8? include the amplitude, period, vertical translation, horizontal shift, and table of values please.

finite math
i used x instead of t. thanks

finite math
As online attacks persist, spending on information security software continues to rise. The table gives the forecast for the worldwide sales (in billions of dollars) of information security software through 2007 (t = 0 corresponds to 2002): Year, t 0 1 2 3 4 5 Spending, y 6 8....

finite math
thanks sooooo much!

finite math
Kane Manufacturing has a division that produces two models of hibachis, model A and model B. To produce each model-A hibachi requires 3 lb of cast iron and 6 min of labor. To produce each model-B hibachi requires 4 lb of cast iron and 3 min of labor. The profit for each model-...

finite math
(281.82-250)*48?

finite math
i got \$198.87 what about the interest charges?

finite math
The price of a new car is \$16,000. Assume that an individual makes a down payment of 25% toward the purchase of the car and secures financing for the balance at the rate of 6%/year compounded monthly. (Round your answers to the nearest cent.) What monthly payment will she be ...

finite math
i put 5.78% and it says it's wrong.

finite math
Carlos invested \$6,000 in a money market mutual fund that pays interest on a daily basis. The balance in his account at the end of 8 mo (245 days) was \$6,230.23. Find the effective rate at which Carlos's account earned interest over this period (assume a 365-day year). (...

geometry
how to solve y= (x-2)^2+4 4x+2y=14 algebraically

English
thanks

English

English
What would you say this line ment: I am the chosen no hand saves?

chemistry
What is the mole fraction of sulfuric acid in a solution made by adding 3.4 grams of sulfuric acid to 3500 mL of water?

chemistry
how many grams of glucose C6H12O6 would you need to make 250 mL of 1.0 M solution?

chemistry
how many moles of sucrose C12H22O11 does 300mL of a 0.10 M sucrose solution contain?

ah trig help
use an apropriate sum or difference indentity to prove the double-angle identity cos2u=1-2sin2u

trig identies 5.3 &5.4
i got it nevermind

english
an ode

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