Friday
April 18, 2014

Posts by steven


Total # Posts: 423

stats
slot machines are now video games, with outcomes determined by random number generations. in the old days, slot machines were like this: you pull the lever to spin 3 wheels; each wheel has 20 symbols, all equally likely to show when the wheel stops spinning; the three wheels a...

stats
you have torn a tendon and are facing surgery to repair it. the surgeon explains the risk to you: infection occurs 3% of such operations, the repair fails in 14%, and both infection and failure occur together in 1%. what percent of these operations succeed and are free from in...

math
So would the ordered pair be (1,4)?

math
Solve using elimination method x+5y=21 -x+5y=19

Chemistry
Copper(II) chloride and lead(II) nitrate react in aqueous solutions by double replacement. Write the balanced chemical equation, the over all ionic equation, and the net ionic equation for this reaction. If 16.06g of copper(II) chloride react, what is the maximum amount of pre...

chemistry
What volume of 0.123 M K3PO4 is required to react with 60 mL of 0.862 M MgCl2 according to the equation 2K3PO4+3MgCl2--> Mg3(PO4)2+6KCl Answer in units of mL.

How can blood type A donate to AB???
I know my reasoning is flawed but I just can't figure out in what sense is it flawed. once again, if I apply my logic... type O has no antigens and A and B antibodies. IF you donate type O to type A, B, or AB, it wouldn't work! cuz the A and B antibodies from type O wi...

How can blood type A donate to AB???
From my understanding, blood type A has A antigens and B antibodies. Blood type AB has A and B antigens and no antibodies. If someone donates type A to type AB, wouldn't the antibody B from type A attack the antigens B from AB??? I know I am looking at this incorrectly but...

Propagation of error and sig. figs
To summarize my messy post, I am unsure how to write my final answer

Propagation of error and sig. figs
I'm really embarrassed to ask this! I knew how to do it before but I forgot after 2 years. I remember learning it for analytical chemistry :( So a basic problem: What is x= a+b+c? given that: a= 100.7 +/- 0.05 b= 0.61 +/- 0.005 c=226 +/- 0.5 OK. My question is the followin...

english
What nursery rhyme character was a "wise galoshes wearing feline" answer has 12 letters.

4th grade
What is matter made up of?

science
Does lighting occur when charges jump between the thunder cloud and the positive ground as a discharge?

Science
Is discharge of static electricity from a huge cloud called a thundercloud?

4th grade
Is all matter made up of tiny particles too small to see

math
if the altitude of a triangle is doubled and the base is multiplied by 3,what is the effect on the area?

accounting
You are provided with the following transactions that took place during a recent fiscal year. Complete the table indicating whether each item (1) should be reported as an operating (O) activity, investing (I) activity, financing (F) activity, or as a noncash (NC) transaction r...

Calculus
Suppose a cylindrical can is manufactured with radius r. The manufacturing process makes the length r imprecise; r can be off by ±0.03 cm. The manufacturing process makes the height of the can precisely equal to three times the radius r (including any error in r, but no...

algebra
72 students is 90% of how many students

math
Find the percent using the percent proportion 75 rolls is what percent of 1000 rolls

math
Identify the percent,whole , and part in the following 30% of 730 is 219 do not solve for any unknowns Percent= Whole= Part=

math
A michigan orchard made 11,491lb of taffy apples with approximately 1lb of taffy mixture for each 76.7 pounds of apples. To the nearest tenth of a pound, how many pounds of apples and how many pounds of taffy were used

MO theory regarding heteronuclear diatomic molecul
Hi all I am having trouble finding the MO order for heteronuclear diatomic molecules: In my textbook, heteronuclear order is listed as: 1o 2o 3o 4o 1pi 5o 2pi 6o where o = sigma When I first saw it, I was confused; how can the above be correct? If one were to calculate bond or...

11th grade chemistry
how many molecules do you have in 64g of CO?

Term symbols for ground states
Dr Bob, Thank you so much!! You have taught me something in mere minutes that my professor failed to do in a single lecture. And thank you again for the web site. I had no idea such a site existed! I wish there was a karma/rep system :) thanks again

Term symbols for ground states
OHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH. if it was 8e- in d orbitals (5 of em) it would be +2 +1 0 -1 -2 for up spin , then +2 +1 and 0 for down spin! therefore, total is 3 and L=3!!!! I hope this is correct!

Term symbols for ground states
Thank you Dr Bob. Yes, I am seriously confusing myself haha As far as the 4d8 is concerned, I was referring to Ni2+ it has 8 electrons it occupies 2, 1, 0, -1, -2 so would that make L = 0 which is S? Sorry for the confusion. I greatly appreciate you staying and helping me desp...

Term symbols for ground states
what about Nb2+ then? it has 8 electrons it occupies 2, 1, 0, -1, -2 so would that make L = 0 which is S?

Term symbols for ground states
But for Nb2+ where it is 4d^3 Shouldn't L be D instead of F? Like p^2 in carbon, L = P And in s^2, L = S ------ Or am I going about this the wrong way?

Term symbols for ground states
You are correct DrBob. Error on my part.

Term symbols for ground states
I have having difficulty understanding where L comes from in term symbol notation For Carbon, e- configuration is 1s^2 2s^2 2p^2 p corresponds to l=1 overall spin is 3/2 since cell is less than half-full, J=S=3/2 so term symbol is 4 P (3/2) this i understand where P came from ...

Quantum mechanics, eigenvalues, eigenfunctions
I'll also like to thank Dr. Physics for helping me last time :)

Quantum mechanics, eigenvalues, eigenfunctions
What exactly is an eigenvalue? "To be an eigenfunction, the operator has to reproduce the function with some multiplicative constant." Is the eigenvalue the multiplicative constant -or- is it the m constant and the function? Many thanks.

statistics
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour fight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail? Show all steps ca...

Quantum mechanics, eigenfunctions!
Thank you! I thought I was going crazy because I wasn't able to an eigenfunction since 1st deriv. would be = cos(x)*e^(ax) + a*sin(x)*e^(ax) which is definitely not an eigenfunction of the operator.

Quantum mechanics, eigenfunctions!
Determine if the function sin(x)*e^(ax) where a=constant is an eigenfunction of the operators d/dx and d^2/(dx)^2 Okay. My understanding is that you use the operator and perform its "thing" on the function. In this case, you will have to find the 1st derivative of si...

social studies
what imapct did the enstablishment of french and dutch coloies in north america have on native americans?

6th grade
How did Canadian Inuits make their decisions. Also did the have a leader or chief and how were they chosen

biology
identify what all organic compounds have in common,and list the four principal classes of or organic compounds

Physics AP C
Two trains, each having a speed of 22 km/h, are headed at each other on the same straight track. A bird that can fly 60 km/h flies off the front of one train when they are 70 km apart and heads directly for the other train. On reaching the other train it flies directly back to...

Fundamental Cornerstones of Managerial accounting
Green Enterprises produces small engines for lawn mowers. during the year, 110,000 engines were produced. The actual labor used was 60,000 hours at $9.50 per hour. Green has the following labor standard: 0.5 hour at $10 1. compute the labor rate variance. 2. compute the labor ...

Chemistry
Write the net ionic equation for silver nitrate and sodium chloride. I only know how to do it when it deals with elements, not compound.

math
x*y=50 x/y=2 10*5=50 10/5=2

math
A right triangle has a hypotenuse of length 3.00 m, and one of its angles is 30.0°. What are the lengths of (a) the side opposite the 30.0° angle and (b) the side adjacent to the 30.0° angle?

math
A painting measuring 100cm by 55cm is to be framed with a matte border of uniform width surrounding the painting. the combined area of the picture and the matte is 9796cm^2. How wide is the matte border?

math
A rectangular field is to be enclosed by a fence. Two fences parallel to one side of the field divide the field into three rectangular fields. If 2400m of fence are available find the dimensions giving the max area.

math
solve for x 3x^2-18x=0

grade 11 math
a uniform-width boardwalk is built around the inside edge of a rectangular parkland that is 10m by 15 m. if the boardwalk takes up 20% of the lot, how wide is the boardwalk to the nearest centimetre?

Physical Science
what grade is this

Math
Today's HW, due tomorrow, I'm lost, please help. 1. 5y - 7x = 10 2. 2y = 10 - 2 (x - 3) 3. y = 2x + 1/2 (3x + 1) + 1/4 (2x + 8)

Physics
If two pith balls - one which is neutral and another which has a charge of -9.6 uC (micro-Coulombs) - are touched together, how many extra electrons will each ball have?

CHEM HELP
Which of the following is NOT true of colligative properties? Colligative properties are... a) dependent on the molar mass of the solute. b) dependent on the mass of solute present. c) responsible for lowering the vapor pressure of a solution versus the vapor pressure of the p...

math: factoring
how would i factor this 2x^2(p + q^3) - (p + q^3)

MATH
I NEED TO FIND WHAT 33333+12=

MATH
END 1045PM ELAPES TIME 12HR 35MIN FIEN WHEN STARTED

college chemistry
I got 1)Potassium persulfate 2)persulfate ion 3)Sodium thiosufate 4)thiosulfate ion

college chemistry
How do I name the following compounds; K2S2O8, S2O8{-2}, Na2S2O3 and S2O3{-2}

Chemistry
The mol mass calculated would be higher than expected. but when we are measuring the pure cyclohexane's freezing point, this wouldn't matter right?? The freezing point would be the same no matter what the volume of solvent.

mathematics
For each of the following state the axiom, definition illutrated. All elements written are whole numbers. v-e= s since e< v and s + e = v

Social studies
what are aboriginal rights ?

Social studies
what are aboriginal rights ?

math
please explain to me how to dived this 57/550

arithmetic
619

arithmetic
4863

arithmetic
50divied483

TRivia
Who said,We may have disagreement, but let some other country step on our tail and see how quickly American unite. It is a Western movie star.

Mircoeconomics
Figure 3-1 ____ 2. Refer to Figure 3-1. Assume that Cliff and Paul were both producing wheat and corn, and each were dividing their time equally between the two. Then they decide to specialize in the product they have a comparative advantage in. As a result, total production o...

math
11

math
22 divied 2

chemistry
Well i believe it is bc H20 needs alot of energy to bc a gas bc of the molecular bonds on it, while CO2 requires less energy to become a gas so that is why it becomes a gas at room temp

french
im trying to say I, and im a boy? so its il?

french
can someone help me edit this? Pour sa nouvelle chambre, il (elle?) veut changer les meubles et la couleur des murs. Aussi, il (elle?) veut organiser sa grande collection de livres des animaux ty

PHYSICS
A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -3.80 rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -21.0 rad/s....

science
in the year 1971. astronaut alan shepard hit a golf ball whila on the surfase of the moon. it became the longest golf shot in history alan shepard was able to hit his recod golf shot because A.the moon dods not have any gravity B.THE GRAVITY OF THE MOON IS WEAKER THAN THE GRAV...

science
some traits in animals are in herited from parents to off spring other traits are learned or result from the influense of the animal's environment identify the trait that results from the influense of the animal's environmet A.many species of insects lay thousands of e...

science
IN SCIENSE CLASS STUDENTS ARE TO FOMULATE A TESTABLE HYPOTHESIS FUOR OF THEYR HYPOTHESIS ARE GEVEN BELOW. WHISH OF THE HYPOTHESIS WOULD BE MOST EASILY TESD BY A FIFTH GRADER .A WATHER AND LAND ABSORB THE SUN,S ENERGY AT DIFFERENT RATES.B. THE MONACH BUTTERFLY'S ENVERONMENT...

science
in order to smell the fumes in a safe manner you should A,hold the item to you nose and sniff quickly B.gently wava the fumes toward you nose and sniff very lightly.C,quickly wave the fumes toward you nose and sniff deeply,D.ASK YOUR TEACHER TO SNIFF THE FUMES FOR YOU

science
solar ligth ,heat ,geothermal solar ligth electrical, solar heat geothermal,solar light heat

science
what forms of energy are provided by the sun

science
whish of the following plantstraits not inherited gras turns darker when sprinkled whid nitrgen B.arosebush has thorns C.maple tree leaves die in the fall D.a cactus stores water

algebra
How do I define a variable and write an inequality to model the following situation? The temperature in a refrigerated truck must be kept at or below 38Deg F

science
The force of attraction between two objects________decreases or increases if you increase the amount of mass or substance in the bodies. The force of attraction between two objexts___decreases or increases if you increase the distance between them?

Math
What is the GCM of 10 and 25.

Math
What is the LCM of 25 and 10

human services in the united states
week six prevention example paper

Axia College
i have been a axia university of phoenix for a year now and its a very well known college and very creditable

Sociology Multiple choice
For question number 2. The answer is D right?

Sociology Multiple choice
For question number 2. The answer is D right?

Social Studies
What was the saying that the colonists cried to protest British tariffs on goods?

math
Factor the trinomial c^2+5c+6

calculating infinity
1) I get it, except for lim (-1)^(n) = ? n-> +infinity is infinity even or odd? This is important because the result determines wheter the series that i was given is convergent or divergent. 2) in another excercise I encauntered the following problem: is the following calcu...

calculating infinity
can someone tell me wich one of the two awnsers for these two limits is correct? lim (-1)^(n) = 1 or -1 n-> +infinity lim (-1)^(n) = 1 or -1 n-> -infinity Thanks in advance.

Biology
sorry a few more questions why can DNA form fibres that allow it to seprate from RNA while RNA cant form such fibres? also, when treated with DNAse, I know DNA viscosity reduces because its cut up into smaller pieces. but on a graph of viscosity vs time, I have this relationsh...

Biology
What does base do to DNA when it is added to it?

Physics
how do i find gravitational potential energy without being given the height?

Physics
A boy weighing 40kg runs at 8.0m/s grabs a rope and swings of level ground. What maximum height does the child reach? How do I solve this?? it is under the conservation of energy section of work, power and energy. any help would be great! thanks

algebra
x+1/x=-7/x-12

Math
find the area and permiter of trapazoides?

algebra
polynomial subtraction a-a2-a-6/2(a-3) a-a(squared)-a-6 divided by 2(a-3)

spanish
Can someone please check this for me? How long has it been since the following people have done the following things? Write the answers using the expression hacer + time. 1) Santi y Silvina: no estar casados / un año Your response: Hace un año que Santi y Silvina...

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