Thursday
November 27, 2014

Posts by c


Total # Posts: 350

Statistics
Daily water intake (including water used in drinks such as coffee, tea and juice) for Canadian adults follows a normal distribution with mean 1.5 litres and standard deviation 0.31 litres. (d) Using the 68-95-99.7 Rule, approximately 95% of samples of 22 Canadian adults will ...
November 5, 2014

statistics
I this binomial? or No? A gumball machine contains 25 gumballs - 9 red, 6 blue, 7 green and 3 yellow. You buy five gumballs from the machine. X = number of green gumballs you get
November 4, 2014

English
I have posted two essays recently and have received no response, one was only a few hours ago but the other one was over 10 days ago....pls help with the one from two hours ago or let me know if you are unable to help. thanks
September 25, 2014

English
Though it is a history essay, my question has to do with writing and essay. The following is what I submitted for an essay and was told it was good but it lacked an introduction and thesis. My first paragraph is what I thought was a sufficient introduction and thesis. Could ...
September 25, 2014

English Classification Essay
I have a lot of holes where I need to look up some research, but can you give me some feedback on the following classification essay: P.J. O'Rourke said, “We loved cars until the 70's or so, they then became appliances. What began as pleasure became a necessity.&#...
September 15, 2014

English
Thank you! or should the third category be family and include van suv and station wagon???
September 14, 2014

English
there are basically three types of vehicle ads the pick up truck, the cool dude car and the mommy van???
September 14, 2014

English
I thought you were suggesting I move specifically to trucks? So if not then okay, "There are basically three types of ads for vehicles, those geared to the economy minded, the cool dude or the hauler???
September 14, 2014

English
I am required to do three. so worker macho guy and what???
September 14, 2014

English
there are three types of truck advertisements those geared toward the worker, the economist and the macho guy
September 14, 2014

English
so are you saying narrow it to truck and say advertisements for trucks appeal in three ways, their intended use, mileage needs and image. (Then, I go into intended use=hauling, mileage needs big wheels for mountains etc, image=large trucks macho)? Does that work? Is that where...
September 14, 2014

English
I know you are trying to make me think this out but i need clarification....I dont know how to categorize those two ideas. if i just put truck that can overlap with affordable and also image....right?
September 14, 2014

English
TV advertisements appeal to audiences in the following ways: accessibility (or should I say affordability?), image and mileage needs? This is my struggle, how to categorize that third area and not overlapping and staying distinct....
September 14, 2014

English
The essay is supposed to be on Advertisements, then we have to narrow it. I have narrowed it to TV advertisements on cars. I was thinking of TV advertisements appeal in the following ways: accessibility, image changing and ???. accessibility would be those advertisements that ...
September 14, 2014

english
Yes that is what I thought but apparently he had concerns with it thank you
September 13, 2014

english
Not long after the introduction of television itself, television commercials became a tool for advertising products and services. The very first television advertisement appeared on July 1, 1941 for a Bulova watch. Other companies like Gimballs department store and Firestone ...
September 13, 2014

english
need some ideas for a classification essay on advertisement pls I have submitted three different options to my teacher and he has declined them either saying there is overlap or they are not distinct. i am stumped! pls help
September 13, 2014

business math
If the Powershooter 1800 is marked up 58.50 what is the cost and the percent markup cost?
May 29, 2014

Statistics
A procedure in regression analysis where Predictor or Independent Variables are coded as 1 or 0 (representing categories) and can be used to produce ANOVA Tables under the General Linear Model is known as…?
April 6, 2014

Chemistry
A student begins with 9.7 mL of a 0.26 M Cu(NO3)2 solution and performs copper cycle lab. She recovers 0.075 grams of copper metal. A) What is the Theoretical Yield B) What is the Actual Yield C) What is the Percent Yield
February 10, 2014

all
I rarely do my homework. No matter how hard I try to focus and actually get things done, I just can't do it unless it's something I really want to/like to do. And even if I actually put my work right in front of me and turn off my phone, computer, tv, etc. and sit in ...
December 8, 2013

geomertry
You eat a new kind of fruit and suffer from hives for the first time in your life. A week later, you try the fruit and the hives recur. A month later, you have a similar experience. conclusin
November 11, 2013

Chemistry
calculate q , w , and ∆ E for melting 1.00 mol of ice at 0 ◦ C and 1.00 atm pressure
September 22, 2013

Calculus
Solve dy/dx for sin(xy)=1+x^3-y^2
July 10, 2013

Accounting Theory
I think this is right up to expected income. Don't you have to add the Good State x .60 and the bad state x .40 to arrive at expected income? And you take the present value of goodwill in the valuation.
June 30, 2013

Chemistry H
120 ml of a gas is in a flask at STP. If the gas is argon, what mass of gas is in the flask?
June 20, 2013

Chemistry H
For the decomposition of aluminum oxide at 35 celsius and atm, what volume of oxygen gas will be produced if 2.77 grams of the oxide react?
June 20, 2013

Chemistry H
Find the molality, mole fraction, and percent by mass of a solution prepared with 500 grams of C12h22O11 in 2000 grams of H20
June 20, 2013

Chemistry H
60.0 grams of Th-210 with a half life of 50,000 years is allowed to decay for 250,000 years. How much of the original quantity remains? In addition, Th-210 decays via beta emission. Write the equation for its transmutation.
June 20, 2013

Chemistry
What is the (a) molality, (b) freezing point, and (c) boiling point of a solution containing 2.29 g napthalene (C10H8) in 44.6 g of benzene (C6H6)?
April 19, 2013

Chemistry
I'm having trouble balancing this equation: SO3^2- --> S2O4^2- It's in a basic solution. Thanks.
April 7, 2013

Chemistry
Hydroxylapatite, Ca10(PO4)6(OH)2, has a solubility constant of Ksp = 2.34 × 10^-59. Solid hydroxylapatite is dissolved in water to form a saturated solution. What is the concentration of Ca2 in this solution if [OH–] is somehow fixed at 5.30 × 10^-6 M?
April 4, 2013

Math
How would I find the confidence level (in %) if I am given the standard deviation, size of the random sample, and confidence interval?
April 3, 2013

Statistics
How would I find the confidence level (in %) if I am given the standard deviation, size of the random sample, and confidence interval?
April 3, 2013

Chemistry
When titrating a weak base with a strong acid, what effect will washing the tip of the burette and sides of the beaker with distilled water have on the pKa and equivalence points?
March 31, 2013

Chemistry
When titrating a weak base with a strong acid, what effect will washing the tip of the burette and sides of the beaker with distilled water have on the pKa and equivalence points?
March 31, 2013

Calculus
Yes...very nasty! Thanks
March 26, 2013

Calculus
No, the equation is 5x^2-2xy+7^y Last term has 7 to the y power....
March 26, 2013

Calculus
Implicit differentiation of 5x^2-2xy+7^y
March 26, 2013

College Physics
A child's toy consists of a toy car of mass 0.100kg which is able to roll without friction on the loop-the-loop track shown. The car is accelerated from rest by pushing it with force F over a distance d, then the car slides with a constant velocity until it encounters the ...
March 24, 2013

Chem
what is the pOH of a 0.12 M solution of pyridine (Kb=1.4x10^-9) at 25 Celsius
March 19, 2013

Chemistry
What is the hydronium ion concentration in a 0.010M solution of carbonic acid, H2CO3? For carbonic acid, Ka1=4.2x10^-7 and Ka2=4.8x10^-11.
March 19, 2013

Chem
in a 0.40 M solution of diprotic acid H2A(Ka=7.4x10^-5, Ka2=5.0x10^-10 at 25 celsius), what is the equilibrium concentration of A^2-? A)0.40m b)0.80M C)5.4x10^-3m d)1.4x10^-5M E)5.0x10^-10M
March 19, 2013

Quantum Physics
a)00> = 1/sqrt2 |01> = 0 |10> = 0 |11> = 1/sqrt2 b) 4
March 3, 2013

Cosmology
The majority of galaxies (by number) are: lenticulars barred spirals dwarfs giant ellipticals
March 1, 2013

Cosmology
What explains the observation that galaxy clustering is stronger at higher redshifts, which is an apparent reversal of the trend out to about z ~ 1? It is difficult to measure peculiar velocities Rich clusters have more galaxies than poor clusters Density contrast seems to ...
March 1, 2013

Cosmolgy
Which of these is the correct relationship between b, the bias factor, the fluctuations in mass (Δρ/ρ)mass and the fluctuations in light (Δρ/ρ)light? b2(Δρ/ρ)light = (Δρ/ρ)mass−1 (Δρ/ρ)light (&#...
March 1, 2013

Cosmology
What can we say about the future evolution of irregular clusters? They will become less centrally concentrated and assume a roughly uniform spatial density. They are not yet in a dynamical equilibrium, but will likely reach it eventually. They will keep contracting until they ...
March 1, 2013

Cosmology
magine you look through a really strong telescope and see a rich cluster. Your telescope is so good that you can see a single galaxy at the center of the cluster. What can you say about that galaxy and be pretty confident that you are correct? It has mass smaller than that of ...
March 1, 2013

Cosmology
We see less cluster evolution at larger redshifts
March 1, 2013

Cosmology
Which of the following is evidence that the evolution of disk galaxies can be greatly affected by their large scale environment? Comparison of emissions from elliptical galaxies in x-ray and optical bands Hydrogen gas deficiency in spiral galaxies near cluster cores The ...
March 1, 2013

Cosmology
The Hubble sequence is useful for distinguishing galaxies on the basis of many properties. Which of these does not correlate well with Hubble type? stellar age dust content luminosity color
March 1, 2013

Cosmology
Which type of emission closely traces the star-forming regions of a galaxy? none of these coronal X-ray emission 21 cm emission molecular CO emission
March 1, 2013

Cosmology
Which of the following statements is not true of spiral arms: they tend to trail the rotation of the galaxy they are sites of star formation they are amplified by resonances between the epicyclic frequencies of stars and the angular frequency of the spiral pattern they arise ...
March 1, 2013

geometry
triangle abc is similar to def, the lengths of the sides of triangle abc is 5,8,11. what is the length of the shortest side of triangle def if its perimeter is 60?
February 28, 2013

Geometry
line segment ab is the diameter of circle O whose center has coordinates (6,8) . what are the coordinates of point b if the coordinates of point a are (4,2)
February 28, 2013

Geometry
line segment ab is the diameter of circle O whose center has coordinates (6,8) . what are the coordinates of point b if the coordinates of point a are (4,2)
February 28, 2013

physics
a 57 g of copper is at 12 degrees celsius, if 1012 J of energy is added to the copper, what is the final temperature of the copper?
January 15, 2013

physics
a 57 g of copper is at 12 degrees celsius, if 1012 J of energy is added to the copper, what is the final temperature of the copper?
January 14, 2013

Chemistry
not right after the conversion 1KJ/mol=1.03*10^-2EV
January 12, 2013

chemistry
its not right with 39.2 and after conversion with 1KJ/mol=1.03*10^-2EV. Any ideas or thoughts on b)?
January 12, 2013

Chemistry
Thanks for a) any thoughts on b)?
January 11, 2013

Chemistry
So what is a) and what is b)?
January 11, 2013

Chemistry
conversion for seconds to hours is 60*60 or multiply 3600.
January 11, 2013

Chemistry
How do you input the data into the formula?
January 11, 2013

Chemistry
not right
January 11, 2013

Chemistry
Shown below are several options for the box notations of the ground state electron configuration of the following gas-phase species. Identify the correct electronic configuration. i. Al2− ii. Mn (a)Select the reason that best explains why the first ionization energy ...
January 11, 2013

Chemistry
Which is the higher density of polyethylene, linear or branched? Select the choice with the best accompanying explanation. Linear polyethylene is the higher density form, as the chains are able to pack better and partially crystallize, resulting in better packing and higher ...
January 11, 2013

Chemistry
pls. c
January 11, 2013

chemistry
Shown below is a schematic representation of the water-ethanol phase diagram. Making reference to the phase diagram, explain in a few sentences how one could enrich a solution of 15 percent ethanol - 85 percent water to a composition of 60 percent ethanol - 40 percent water. ...
December 21, 2012

chemistry
pls. tell
December 14, 2012

Chemistry
1) Cubic 2) Simple cubic 3) Cs+Cl− pair
November 24, 2012

world history
If you mean Britain was the archenemy of the USA and France. Then lets check the two country out.(A quick breakdown) USA fought two wars with Britain but due to WWI, Britain became allies with the USA for support and troops and the WWII as the Axis/Japan bomb Pearl Harbor. ...
November 22, 2012

Chemistry
(a) is right and the (b)?
November 22, 2012

Chemistry
Your x-ray lab has a monochromator consisting of a single crystal of nickel cut so that the (001) plane lies in the cube face. At what angle (in degrees) should the cube face be tilted with respect to the incident beam in order to select radiation with a wavelength λ=3....
November 22, 2012

Chemistry
Thank you!
November 22, 2012

Chemistry
Thanks for the help but it Wasn't right!
November 22, 2012

Chemistry
Name the following crystallographic features below using proper crystallographic notation. Image One [2ˉ21] [1ˉ12ˉ] [1ˉ1(1/2)] [(1/2)(1/2ˉ)1ˉ] Image 2 (1ˉ02) (21ˉ0) (201) (1ˉ02ˉ)
November 22, 2012

Chemistry
An x-ray generator operated at a plate voltage of 7000 V is incapable of producing Ni Kα radiation. Calculate the minimum energy required for a ballistic electron to produce Ni Kα radiation. Express your answer in units of eV.
November 22, 2012

Chemistry
CdO is cubic with a lattice constant a=4.695 A˚ and a density ρ of 8.15 g/cm3. Determine the crystal structure of CdO. Simple Cubic Face Centered Cubic Body Centered Cubic
November 22, 2012

Chemistry
Thank you
November 22, 2012

Chemistry
Calculate the density of atoms along [011] in molybdenum (Mo). Use only the information provided in your class Periodic Table, and express your answer in units of atoms/cm.
November 22, 2012

Chemistry
(a) Calculate the lattice constant a in palladium (Pd). Use only the information available in the class Periodic Table, and express your answer in angstroms. (b) Calculate the distance (in angstroms) between adjacent (110) planes in palladium (Pd). Hint: use your work from ...
November 22, 2012

Chemistry
Thank you!
November 22, 2012

Chemistry
The crystal structure of cesium chloride (CsCl) is shown in the figure below. The dark spheres represent atoms of Cl. Identify the crystal system: Cubic Tetragonal Orthorhombic Rhombohedral Hexagonal Monoclinic Triclinic Identify the Bravais lattice: Simple cubic Body ...
November 22, 2012

chemistry
thanks
November 19, 2012

chemistry
0.388e-6
November 19, 2012

Chemistry
thanks
November 19, 2012

Chemistry
1) True 2) False
November 19, 2012

Chemistry
The conduction band is at a higher energy than the valence band. True or false? No electronic states lie between the conduction and valence bands in n-type silicon. True or false?
November 19, 2012

Chemistry
thanks
November 19, 2012

Chemistry
thanks
November 19, 2012

Chemistry
thanks
November 19, 2012

Chemistry
Multi-electron Atom Ionization Energy, Conservation of Energy, Wave-Particle Duality.
November 18, 2012

chemistry
10.4
November 18, 2012

chemistry
(Kg of Na)/ 23*4 =X X * 47.88 = in g convert to Kg
November 18, 2012

Chemistry
Jiskha is not part of the MITx platform!!! How the honor code of MITx could be applied to an user of other system?
November 18, 2012

Chemistry
Jiskha is not part of the MITx platform!!! How the honor code of MITx could be applied to an user of other system?
November 18, 2012

Chemistry :(
10.4
November 18, 2012

chemistry
p=h/lambda(meters) , E= p^2/2m + 1.659*10^-18, LambdaMax=hc/E
November 18, 2012

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