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Questions Asked on February 23, 2013

a sample of an unknown metal has a mass of 21.6g and a volume of 8.00cm^3 . calculate the density of the unknown metal
1. 6 answers
2. asked by Stefan
3. 2,938 views
2.8% hydrogen, 9.8% nitrogen,20.5% nickel, 44.5% oxygen, and 22.4% sulfurdetermine empirical formula for compounds
1. 3 answers
2. asked by tula
3. 1,972 views
I have to solve for "x":bx/c=2-cx/b please show your work! Thank you!
1. 1 answer
2. asked by NEED HELP NOW!!
3. 299 views
Phosphoric acid is a triprotic acid with the following pKa values:pka1: 2.148 pka2: 7.198 pka3: 12.375 You wish to prepare 1.000
1. 5 answers
2. asked by Sam
3. 5,344 views
1/a-y=1/ysolve for "y"
1. 4 answers
2. asked by NEED HELP NOW!!
3. 627 views
I have an essay due and I cannot really understand the topic im supposed to write about. Its about the novel "sense and
1. 6 answers
2. asked by kaliegh
3. 636 views
True or False. When non-conservative forces are present, the amount of work done increases with the length of the path.
1. 2 answers
2. asked by Anonymous
3. 1,301 views
What results in the combination of the haploid sets of chromosomes from two individuals into a diploid zygote
1. 2 answers
2. asked by Candy
3. 538 views
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure
1. 1 answer
2. asked by Anonymous
3. 546 views
Proteins found on the outside of cells and viruses are called ____________ , these are used by the body to _______________
1. 3 answers
2. asked by Brooke J.
3. 617 views
A cylindrical container is 30cm in diameter. If is filled at rest by 20 cm of fresh water, and then spun at 30 rpm. after state
1. 0 answers
2. asked by Ahmed Mohammed Ali
3. 853 views
(sec^2x-1)(csc^2x-1)=1 prove the following identityive been stuck on this for hours please help
1. 2 answers
2. asked by Anonymous
3. 1,188 views
In a series RCL circuit the generator is set to a frequency that is not the resonant frequency. This nonresonant frequency is
1. 0 answers
2. asked by Please HELP
3. 855 views
The antenna broadcasts radio signals at the resonant frequency of the tank circuit. Suppose that a certain tank circuit in a
1. 0 answers
2. asked by Please HELP
3. 447 views
During a circus performance, a 77-kg human cannonball is shot out of an 20-m-long cannon. If the human cannonball spends 0.91 s
1. 1 answer
2. asked by Ronnica
3. 557 views
From 5 statisticians and 6 economists, a committee consisting of 3 statisticians and 2 economists is to be formed. How many
1. 0 answers
2. asked by Therese
3. 524 views
given f(x)= x^2+x and g(x)=2x+1 determine f[g(x)]i don't even know where to start with this question help is much needed
1. 1 answer
2. asked by anna
3. 385 views
use implicit differentiation to find dy/dx . Then evaluate the derivative function at the designated point.x2y2 − 1= 0;(0.5,
1. 0 answers
2. asked by jimbob
3. 985 views
use implicit differentiation to find dy/dx . Then evaluate the derivative function at the designated point2xy2 – y = 10; (1,
1. 0 answers
2. asked by jimdandy
3. 479 views
Please Help Quick,Write Out The Balanced Chemical Equation For Respiration In An Athlete In A Race.
1. 3 answers
2. asked by Chris
3. 423 views
y=(4(x)-3)^(2)*(3(x)^(2)+2)^(4) implicated differentiation
1. 1 answer
2. asked by jonh
3. 274 views
What is the website that is used to do the diagrams. Its like circles connected to circles in this diagram.
1. 1 answer
2. asked by Celest
3. 417 views
use implicit differentiation to find dy/dx . Then evaluate the derivative function at the designated point.log (xy)= 2; (4, 25)
1. 1 answer
2. asked by mark11
3. 562 views
I am confused on how solve this substitution problem4y+3=3y+x 2x+4y=18 If you can, show work please (:
1. 2 answers
2. asked by Stephanie
3. 487 views
Create an outline that includes details that support your thesis. Outline only the body of your paper. Remember to avoid bias to
1. 1 answer
2. asked by rosita
3. 515 views
find f' of f=(x)cosh^(-1)((x)/(2))-√((x)^(2)-4)
1. 0 answers
2. asked by jonh
3. 355 views
abcd is a parallelogram with sides ab=12 cm,bc=10 cm and diagonal ac=16 cm .find the area of the parallelogram also find the
1. 2 answers
2. asked by Anonymous
3. 533 views
For a population of μ = 70 and σ = 20, find the z-score and percentile rank for each of the following X scores: 80, 100, 65,
1. 1 answer
2. asked by jackee
3. 556 views
Simplify.1. Log base 4 of 256^2 IS THE ANSWER 8....IF SO AM I SMART? 2. Log of 45 ^x Is the answer 1.65X? 3. Log base 6 of 12
1. 1 answer
2. asked by Anonymous
3. 451 views
Is arranging and changing places an example of assonance?
1. 1 answer
2. asked by Queenie
3. 476 views
Posted by Dan on Thursday, February 21, 2013 at 11:17pm.Plane flying southwest at 155mi/hr. their is a wind from the west at
1. 1 answer
2. asked by Rick
3. 401 views
Can someone please assist meThe problem reads "use the rule of 78 to find the payoff amount for the loan paid in full before the
1. 0 answers
2. asked by Meg
3. 431 views
The broadest type of search, which looks for your terms any where , is a/an .A. title B. keyword C. auther D. subject my answer
1. 1 answer
2. asked by Kim
3. 1,169 views
Can someone check my answers please and if Im wrong please explain.1) graph 4x^2+4y^2=64. what are the domain and range?
1. 57 answers
2. asked by lee
3. 19,262 views
A few more question Id like for someone to check please.1) what are the vertex, focus, and directrix of the parabola with the
1. 2 answers
2. asked by lee
3. 8,467 views
A force of 20 N gives an object an acceleration of 5m/s^2. (a) What force would be needed to give the same object an
1. 0 answers
2. asked by jake
3. 754 views
The acceleration of gravity on the surface of Venus is 8.9m/s^2. Would a ball thrown upward on Venus return to the ground sooner
1. 1 answer
2. asked by jake
3. 2,471 views
what is the best way to incorporate an idea from a journal article into a research paper
1. 1 answer
2. asked by Anonymous
3. 481 views
The total pressure in a vessel containing hydrogen collected over water at 25.0°C was 0.8 atm. The vapor pressure of water at
1. 1 answer
2. asked by Lupe
3. 581 views
A test car travels in a straight line along the axis. The graph in the figure shows the car's position as a function of time
1. 0 answers
2. asked by Dani
3. 1,243 views
0.50g of a mixture of K2c03 and Li2c03 requires 30ml of a 0.25N hcl solution for neutralization. What is the percentage
1. 1 answer
2. asked by Fai
3. 677 views
How fast is a city on the earth's equator (such as Singapore) moving due to our planet's daily spin on its axis?
1. 0 answers
2. asked by Dani
3. 456 views
F(x) = (x^3 - x + 1)^4f'(x)=
1. 1 answer
2. asked by Nelly
3. 336 views
3 equal charges (all +Q) are located at A, B and C. ABC is an equilateral triangle with sides d. Point A is located at (0,0),
1. 0 answers
2. asked by P
3. 532 views
3 equal charges (all +Q) are located at A, B and C. ABC is an equilateral triangle with sides d. Point A is located at (0,0),
1. 0 answers
2. asked by P
3. 621 views
Write the complex number z = −6 in polar form
1. 1 answer
2. asked by Jane
3. 512 views
Convert the complex number c=3cis 0.25 into rectangular form.
1. 1 answer
2. asked by Jane
3. 909 views
approximately 300 millions golf balls were lost in the united states in 2009 assume the number of gold balls lost in an 18 hole
1. 1 answer
2. asked by Anonymous
3. 416 views
1.What is the organization in the first paragraph of "The Next Big Thing"? (1 point) chronological order compare and contrast
1. 4 answers
2. asked by Anonymous
3. 621 views
Details:Part I: Principles of the Constitution Create a chart or a matrix outlining the following primary principles of the
1. 1 answer
2. asked by Sylvia
3. 594 views
find the radius of the circle if length of arc is 4p cm and angle made by the arc atthe centre is 40 deg.find the area made by
1. 1 answer
2. asked by urvashi
3. 494 views
theta=sin^-1 (5/13) ; (x,y)=(-3,1)how do u find the coordinates of x' and y'??
1. 8 answers
2. asked by kikii
3. 350 views
A person buys a refrigerator for rupees 12000. He pays rupees 6000 in cash and agrees to pay the balance in 12 annual
1. 0 answers
2. asked by Anonymous
3. 478 views
(b) Calculate the amount of zirconium produced (in kg) if a reactor were charged with 310.0 kg and 29.0 kg Na.
1. 0 answers
2. asked by Anonymous
3. 356 views
Ammonia is composed of hydrogen and nitrogen in a ratio of 9.33 g of nitrogen to 2.00 g of hydrogen. If 2.19 g of nitrogen
1. 1 answer
2. asked by alex
3. 1,668 views
pHStrip b = 10. Strip D = 3 what would happen if you mixed togather equal amounts of the solutions that produced the results of
1. 1 answer
2. asked by Mia
3. 521 views
You decide to open an IRS-approved retirement account at your local brokerage firm. Your best estimate is that it will earn 9
1. 0 answers
2. asked by manny
3. 497 views
You plan to open a retirement account. Your employer will match 50 percent of your deposits up to a limit on the match of $2500
1. 1 answer
2. asked by katie
3. 564 views
Can anyone please answer my chemistry question i posted quick?
1. 5 answers
2. asked by Mia
3. 425 views
ABCD is a parallelogram.AB=9cm,BC=5cm and DE is perpendicular to AB.If the area of parallelogram is 36sqcm,find AE?
1. 1 answer
2. asked by Anonymous
3. 999 views
The video discusses the logistics involved some of fedex service offering. Fedex ship FOB destination because the seller pays
1. 0 answers
2. asked by Akia
3. 444 views
A $90,000 investment is made. Over a 5 year period, a return of $30,000 occurs at the end of the first year.Each successive year
1. 0 answers
2. asked by katie
3. 1,064 views
ABCD is a square of side length 1. E , F , G and H are the midpoints of AB , BC , CD and DA , respectively. The lines FA , AG ,
1. 1 answer
2. asked by Anonymous
3. 911 views
in what ways do you think earth's moon may be similar to mercury
1. 0 answers
2. asked by Angie
3. 297 views
Write the complex number z = 2 + 5i in polar form, rounding to the nearest hundredth if needed.
1. 1 answer
2. asked by Jane
3. 1,571 views
The vectors, (2, -1) and (4, 8), are1)parallel 2)perpendicular 3)neither parallel or perpendicular
1. 0 answers
2. asked by Jane
3. 447 views
Write the following complex number in polar form: z = 4 − 4i
1. 1 answer
2. asked by Alice
3. 1,132 views
I have a problem like this:CHCl3 + Cl2 = CCl4 +HCL This is the rate table: CHCL3 Cl2 Initial Rate .010 .010 .0035 .020 .010
1. 2 answers
2. asked by Nancy
3. 1,172 views
Mike and Lani stand 21.2 meters apart. From Mike’s position, the angle of elevation to the top of the Eiffel Tower is 40°.
1. 2 answers
2. asked by Charlie
3. 2,201 views
a force of 4N at 30 degree from another force 5Nwk is pointing east. find the resistance of the two forces using parallelogram
1. 1 answer
2. asked by stanley
3. 330 views
Suppose <A is one of the acute angles formed by the line x+2y=6 and the x axis. What is the approximate measure of <A to the
1. 2 answers
2. asked by Snake
3. 997 views
A forest ranger in a 140-foot observation tower sees a fire moving in a direct path toward the windmill by the lake. The angle
1. 6 answers
2. asked by Snake
3. 4,117 views
This question has been bugging me for a long time. A rock contains a Pb-206 to U-238 mass ratio of .145 to 1.00. Assuming that
1. 1 answer
2. asked by Nancy
3. 2,063 views
prove:1) nCr=nCr-r2) nCr+nCr+1=n+1Crr+1
1. 0 answers
2. asked by stanley
3. 390 views
pHC ( dark green) pH : 8 d ( purple) pH : 3 Suppose u mix togather equal amounts of the solutions that produced the results of
1. 1 answer
2. asked by Mia
3. 1,153 views
Suppose u place a beaker containing a solution in a refrigerator , an hr later a white solid is found on thr bottom of thr
1. 1 answer
2. asked by Mia
3. 738 views
which of the following ideas was not promoted by the social contract theory
1. 0 answers
2. asked by keona
3. 664 views
A 50kg rocket is fired vertically upwards and experiences a 300N air friction force.What upthrust must the rocke motor produce
1. 1 answer
2. asked by Anonymous
3. 433 views
If fixed cost is $8,000, variable cost is $5,000 at an output of 2 and $9,000 at an output of 3, how much is marginal cost at an
1. 3 answers
2. asked by Lisa
3. 735 views
what are the two critical points for r=4cos( 4(theta)) and its symmetries. As well as for r=2+2sin(theta)?
1. 1 answer
2. asked by cindy
3. 2,738 views
What is the % M/M concentration of 5.00 mL of methanol in 25 g solution of methanol in water? The density of methanol is 0.791
1. 1 answer
2. asked by Rena
3. 463 views
How would you classify the following material?swimming pool waterhomogeneous mixture<<< heterogeneous mixture a pure element a
1. 1 answer
2. asked by JJ
3. 936 views
When 4.54 g of a nonelectrolyte solute is dissolved in 565 mL of water at 29 °C, the resulting solution exerts an osmotic
1. 1 answer
2. asked by Jim
3. 1,179 views
Find the equation of the secant line to the graph of y= 2x^3-3x^2+4x-1 from x=1 to x=3. Give your answer in slope-intercept
1. 0 answers
2. asked by Sam
3. 347 views
Show that proj(b⃗a⃗) =[(a⃗⋅b⃗)/(b⃗⋅b⃗)](b⃗)
1. 0 answers
2. asked by Ginny
3. 409 views
The number of gallons of water remaining in a swimming pool t minutes after the drains are opened and the pool begins emptying
1. 0 answers
2. asked by Chase
3. 652 views
The number of gallons of water remaining in a swimming pool t minutes after the drains are opened and the pool begins emptying
1. 0 answers
2. asked by Chase
3. 715 views
calculate the pH and the propionate ion concentration [c3h502-] of a solution that is .06M in potassium propionate [kc3h502] and
1. 2 answers
2. asked by Michael
3. 572 views
The resistances of a platinum resistance thermometer at the ice point, the steam point and the boiling point of sulphur are
1. 0 answers
2. asked by shashi ranjan
3. 652 views
Calculate the wavelength of a proton with energy 2.45eV.in meter plz
1. 3 answers
2. asked by schoolgirl
3. 471 views
Determine two angles between 0°and 360°that have a secant of -4. Round your answers to the nearest degree.There are tw answer
1. 0 answers
2. asked by Priya
3. 489 views
Determine two angles between 0°and 360°that have a secant of -4. Round your answers to the nearest degree.There are tw answer
1. 1 answer
2. asked by Priya
3. 2,481 views
what mass of Fe3O4 would conatin 1.85*10^21 atoms of Fe?
1. 1 answer
2. asked by rose
3. 355 views
I am not a english speaker!!!!!!!!i am writing a resume is this statement correct: I am introducing my work: Student focus
1. 1 answer
2. asked by rita
3. 589 views
What units of measurement do you use to measure the earth to...1. Moon 2. Galaxy 3. Sun 4. Communication satellite 5. Pluto 6.
1. 2 answers
2. asked by Abbey
3. 714 views
abcd is a parallelogram with sides ab=12 cm,bc=10 cm and diagonal ac=16 cm .find the area of the parallelogram also find the
1. 1 answer
2. asked by Shubham
3. 636 views
empirical formulas"p 889(153e)
1. 3 answers
2. asked by rose
3. 301 views
One reaction that produces hydrogen gas canbe represented by the unbalanced chemical equation Mg(s) + HCl(aq) −! MgCl2(aq) +
1. 1 answer
2. asked by Anonymous
3. 1,058 views
the pet shop owner told jean to fill her new tank 3/4 full with water. Jean filled it 9/12 full. what fraction of the tank does
1. 2 answers
2. asked by Lissette
3. 448 views
Why did the Persians who seemed more powerful lose to Alexander?
1. 1 answer
2. asked by Gregory
3. 424 views

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