Monday
January 16, 2017

Posts by bobpursley

Total # Posts: 43,168

literature
http://examples.yourdictionary.com/figure-of-speech-examples.html
January 16, 2017

Biology
Molarity=mass/MW / 3 = 2/(3*75) check my molmass.
January 16, 2017

Vectors
change the second term to y instead of x
January 16, 2017

Reading
Because the doctor held no sympathy for the family, he viewed them as burdens on his time, and a burden on the community.
January 16, 2017

Math
volume of evap=30dm*100dm*.4 dm = 300*.4=120 dm^3 and of course 1 dm^3 = i liter.
January 16, 2017

Chemistry
There are 8.9*8 moles of H in that compound, however, H does not exist in nature, H2, does, and there are .5*8.9*8 moles of H2 there.
January 16, 2017

Chemistry
what is 2*8.5 ?
January 16, 2017

Math
105+7A+8A=180 solve for A then the angles are 7A, and 8A
January 16, 2017

Math
correct, as long as a does not equal 1/2 c. Division by zero is never allowed.
January 16, 2017

what happen i need an answer
We have them all the time. If you are trying to post in matrix form, difficult. In i,j,k format it works easy. are you suing <i, ...> symbols? those might be interpreted as HTML, and then being voided. but honestly, I dont know the issues, but I suspect in your text you ...
January 16, 2017

what happen i need an answer
Posts are only removed if they are threatening, use bad language, demeaning to others, attempts to cheat, or assisting in cheating. If your question didn't post, then it was not removed. Sometimes text wont post because it has hyperlinks in it. We don't allow ...
January 16, 2017

Math
There is not an optimal solution to this, as far as I know. If you consider the board to be invisible squares of 70cm x 70cm, 30 of them side by side, you can then look at packing circles in squares, and you have the squares then 5 diameters x 5 diameters. Now for squares, ...
January 16, 2017

Math
see the post above.
January 16, 2017

Science
If you have a high speed camera, determining what the water does when it strikes different surfaces: water surface (there are thousands of photos of that already), flat hard surface, flat soft surface, etc. Is the path for the drips straight down? Put different objects near ...
January 16, 2017

Math (misleading graphs) (Statistics)
D, with all the fancy talk, is correct. Viewers might not realize it is only height that is used, because they see size first and think size is population.
January 16, 2017

Science
ww x bb bw,bw, bw, bw are the only possible combinations, all black
January 16, 2017

English
"immediate action was imperative" is imperative case. C is a suggestion, not of immediate action. Imperative case is somewhat akin to telling a kid not to step into the street when crossing. Look first!
January 15, 2017

physics
time to fall 150m h=1/2 g t^2 t=sqrt(2h/g)=you do it distance from target to drop: 300,000m/3600sec=velocity figure that v. then distance to drop=v*time above tanTheta=distance/150 check my thinking
January 15, 2017

physics
ok, horizontal distance=1.5*time to drop time to drop=sqrt(2*n*.5/g) but horizontal distance=.5*n where n is the step .5n=1.5*sqrt(2n*.5/g) solve for n (square both sides .25n^2=2.25*n/9.8 n=9/9.8 n less than one, so first step it hits.
January 15, 2017

calculus
y(1-x)=5 y=5/(1-x) where x is not equal to 1 domain of x: all real values of x not equal to 1.
January 15, 2017

Chemistiy
i. No. Zn has a ++ valence, so product is Zn(NO3)2 . Redo equation ii. ok iii Nope: metals + acids>>hydrogen gas + metalcompound (Al(NO3)3) iv. maybe,depends if in aq solution or not. I dont know where you are in CHEM. RX is ok if you just have studied reaction types, ...
January 15, 2017

Chemistiy
On steel ships, corrosion is greatly increased by having bronze (copper alloy) propellers. Current will flow from the props thru the (salt bridge) seawater, turning the Fe to Fe++. Copper embedded in the steel will do the same. http://www2.ucdsb.on.ca/tiss/stretton/chem2/...
January 15, 2017

science
you have to know density of the sample. mass=volume*density w/v= Volume*density/Volume so .01 w/v=.01*density
January 15, 2017

Algebra 2
3*log8 (x)=4 log8 (x)=4/3 8^(4/3)=x 2^4=x x= 16
January 14, 2017

Math
So if wou need to convert to microliters, it is 17,000
January 14, 2017

Math
Nope. V1=C2V2/C1 = .25MilliMoles/liter*.001Liter/.15millimoles/liter = .25/.15 * .001L = 17*.001L= 17 milliLiters I don't have a clue why you are coming up with microliters. little m means milli
January 14, 2017

math
I had 200 tickets, and my dog ate 196 of them. How many were left over.
January 14, 2017

Math
Your abbreviations are totally confusing. I read mM as millimolarity and I have no idea how this translates to micro in your answers.
January 14, 2017

physics
a. d1=.5 (2)t^2 d2=.5 (3)t^2 +24 but d1=d2 then put d1, d2 in and solve for time t. b. use the d2 equation c.v2=3*t^2
January 14, 2017

math
what is 90/36?
January 13, 2017

social studies
And desire not to be hindered by kids... travel, partying, and desire to not pass on "bad" genes (ie, breast cancer) and some folks just dont like kids, and have the courage to admit it. Having a kid and doing it right is a decision that has long term impacts and ...
January 13, 2017

physics
If you go thru the proof on an energy basis, you have to set initial KE to final KE eventually, and in that analysis, you will deal with tangent or sine of the angle of swing, and you will have to ASSUME the angle and it's sine and it's tangent are all equal. That is ...
January 13, 2017

physics
Draw a figure. look at the forces : centripetal force =mv^2/radius gravity force along the radius: mg*CosTheta (angles measured from the top). set them such that gravit>=cent force v^2/r>=g*cosTheta solve for v
January 13, 2017

Calculus
x^2-4y^2=9, 2x dx/dt-8y dy/dt=0 when x=5, solve for y in the original equation, then put y in 2x dx/dt-8y dy/dt=0 and solve for dy/dt
January 13, 2017

Calculus
y'=2xyy'+y^2-xy'y+1 y'(1- xy )=y^2+1 check that then solve for y'
January 13, 2017

physics
What do you mean by "took me to recognize" "how will I go"
January 13, 2017

science
It means you take a stem with a growth node, or exposed epi cells, put a rooting hormone on it, then place it in a humid environment for several weeks and wait for growths. Many plants can be propagated this way. I have done figs, berry plants, and woody plants. https://www....
January 13, 2017

science
Who? I do on figs, and flowering hedges. I dont understand your question
January 13, 2017

Algebra 2
English letters? 27*27*10*10*10*10 This assume zero and the letter O can both be used.
January 12, 2017

Physical Science
where did the 80 come from? The primary voltage is 60 N/15=160/60 N= 15*160/60=40 turns.
January 12, 2017

PLEASE ANSWER! I NEED HELP
The question (Glencoe P Science) is silly. It is an inference question without backup understanding. Wondering if one of the containers has sharp edges.
January 12, 2017

PLEASE ANSWER!!
Are you listening in class? You seem to be having difficulty with the synthesis questions. Surely you discussed a) resonance and positive interference. b) sound waves require a physical media to transmit waves c) negative interference.
January 12, 2017

Science
what is 1/2 * 4 *10^2 ?
January 12, 2017

physics
Initial momentum=final momentum (75+8)1.5=8*V solve for V
January 12, 2017

Math
See the prior post, I found the error.
January 12, 2017

Math
OOPs, typo 1 + .0575/4=1.0144
January 12, 2017

Math
950=700(1+.0575/4)^n solve for quarters n. take log of each side log(950)=log(700)+n*log(1.0244) solve for n.
January 12, 2017

Social Studies
I have no idea what your text says, in this surrender speech text there are some revealing notes at the bottom. But I dont know if this is the speech you are refering to. http://www2.gsu.edu/~eslmlm/chiefjoseph.html On the questions, those are YOUR feelings. For me, it was a ...
January 11, 2017

College Physics
force*time=mass*changevelocity time= 474*(1630-730)/.056 = = 7617857.14 seconds= about 88 days
January 11, 2017

Algebra
The points are + 1 |22 2 |50 3 |62 4 |75 or (1,22); (2,50); etc...
January 11, 2017

Algebra
You need to change teachers. b, and c make no sense. Exactly what is upside down to a small curve, when the small curve was never specified. Then, what is a a "perfect diagonal" turned upside down. Someone is teaching math from another planet here. Graph the points, ...
January 11, 2017

calculus
dBM/dx=30-10x=0 x=3m BM(max)=f(x)=30*3-5(9)=35kNm
January 11, 2017

physics
force=w*length wire breaking stress*Areawire=w*lengthwire solve for w
January 11, 2017

maths
what is (24-28)/24 all times 100? Notice the negative answer, meaning the error is to the low side.
January 11, 2017

PRODUCTION OF SODIUM CARBONATE FROM NACL
How would sodum chloride (NaCl) produce carbon dioxide? Where is the carbon coming from? The second question just makes no sense to me.
January 11, 2017

Math
Yes you need help. y=9x-4 does not have three solutions, it is a linear equation. I suggest you pay less attention to your dress and image, and more to lesson 12 unit 7
January 11, 2017

Earth science
This NY regents practice exam follows the standard, it is a "figure it out" standard from reading tables and maps. Here is how you can do that: https://books.google.com/books?id=p7vJr1irJSMC&pg=PA98&lpg=PA98&dq=Most+New+York+State+sandstone+bedrock+was+formed&source=...
January 10, 2017

class8
This is a area of contention, it is based on social justice. You can google and find many articles on rights vs responsibilities,and they generally say yes, true. However: consider dementia, infants, animals, and the mentally handicapped...do they not have rights just because ...
January 10, 2017

Maths
I think that is algebratic...
January 10, 2017

Maths
N=number of days N(24-20)=36 solve for N then jacks money was N*24
January 10, 2017

math;);)
multiply it by the vertical matrix 1 1 1 1 1 1 2 then you get a sum, divide by 8 and you have the weighted average.
January 10, 2017

Science
How does the volume of a rock change? Think about that. So I assume from displacement, the rock volume is 10ml density=mass/vol=3g/ml
January 10, 2017

stats
What is 80*.65 number of cards marked?
January 10, 2017

Dwight Kurt Schrute
Please refrain from posting answers here, that is not helping kids understand anything, besides, your answers are just often wrong. If you can't control your behavior, we will take appropriate action to protect our students who come here for help, not answers. Thanks.
January 10, 2017

Geometry
volume=1/3 basearea*h ok, base area: triangle sides are 25cm each, or .25m s=semiperimeter area=s(sqrt(s-side)^3) s=75/2 s-side=37.5-25=12.5 area=37.5*12.5*sqrt12.5 let E6 mean 10^6 .075E6m=1/3 (37.5*12.5*(sqrt12.5))h solve for h I get:137cm check all this carefully, it is ...
January 10, 2017

math
Nope, Nyan: area of a triangle is 1/2 times base times height.
January 10, 2017

physics
no delta Temp on i on ii: C=8000/(500*40) in J/gC
January 10, 2017

science
google protozoans
January 10, 2017

why do we fall ill- science
depletion of white blood cells depletion of T cells some say ...https://dailyhealthpost.com/weaken-immune-system/ But I would focus on nutrition, stress, and drugs (including Rx antivirals and antibiotics).
January 10, 2017

physics
sum heats transfered is zero (some are + gains, some are - gains). heat to melt ice+heat to heat melted ice + heat to original water=0 Lf=latent heat of fusion ice cw=specific heat capacity of water Lf*150+150*cw(Tf-0)+300*cw*(Tf-50)=0 look up Lf solve for Tf
January 10, 2017

science- sound class 9th
frequency=1/Period or frequency*period=1
January 10, 2017

science- sound class 9th
the sound traveled there, and back. 2*distance=velocitysound*time distance=346*2=...
January 10, 2017

American Government
Google the following terms: purpose of Federalist papers judicial activism and Constitution John Locke's social contract and the First amendment US Congress Standing committees essay questions require thinking, and to do that, it requires research and absorbing.
January 10, 2017

Maths
left= 800-amount spent left=800 - 1/2*800 -1/4 *800 =800(1-2/4-1/4)=800/4
January 10, 2017

physics
Law of continuity: Mass rate in = mass rate out, or Area1*density1*Velocity1=area2*velocity2*density2 densities are equal, so .07m^2*3.5m/sec=.105m^2*V solve for velocity V volume/hr=V*3600sec/hr in 1000 hrs, multiply that by 1000
January 10, 2017

pure physics
I have always wondered what pure physics means, now I know: Archimedes Problem solving. I thought at one time in my life, Pure Physics was what ever science politicians could not comprehend. But I changed my mind, as they cannot grasp hardly any science (or math).
January 10, 2017

Physics
Isn't this Kepler's Law? Period^2=contant*radius^3 and as a ratio PeriodISS/PeriodMoon = (radiusISS/radiusmoon)^3 change the periods to the same units, I would do hours for both, but it does not matter which you choose.
January 9, 2017

Physics
How long does it take to fall height H? figure that. then, distance=velocity*timefalling solve for velocity
January 9, 2017

chemisry
https://sites.prairiesouth.ca/legacy/chemistry/chem30/graphics/4_graphics/sol_curve.jpg Looks like solubility is 40g per 100 g of water, and in 50 g, then 20g, so yes, the 10.1g of KNO3 will dissove. I guess that is what you are asking, you have dissolved 20.2g/100gwater
January 9, 2017

Nobody LA Questions
I would relook at question 3. On the others, I reminded myself that Emily was a really shy, reserved introverted person, that avoided contact with most people outside a very low number of personal contacts. Some think she suffered from depression.
January 9, 2017

Math
area=LW= but L=32-2w area=W(32-2W)=32w-2w^2 but roots of the equation are 0=2w(16-w), w=0, or w=16 since this is a parabola, the max/min will occur at 8 (halfway between the roots). so w=8, L=16
January 9, 2017

science questions please answer at least 45minutes
Nuts, if you dont know the answers, just flunk and take the opportunity to learn it. I doubt if anyone here is going to give you answers...most of them will be happy to check your work, but honestly, it appears you are answer grazing.
January 9, 2017

history
I would not discount << Wilson and Lodge’s personal dislike of each other poisoned any hopes for a compromise, and ...>> first link quote. Here is a link that is easy reading that explores the family, political, and personal grievances in that feud between the...
January 9, 2017

maths
avgspeed=distance/time
January 9, 2017

chemistry help asap please
M=molessalt/volumesolution
January 9, 2017

Math
320=5*Area area=320/5=64 rs
January 9, 2017

science
Wouldn't it matter where Dad sat, his weight, and the boys weight?
January 9, 2017

Physics
reactance=.159/(f*C) or if you prefer = 1/(2PI*f*C)
January 9, 2017

physics
No drawing? Goodness
January 8, 2017

Maths
1. allowing zeroes in each position, then 10*9*8*7, no repetition. 2. with repetition allowed... 27^3*10^3
January 8, 2017

Math
-3x^2+24x-46 =-3(x^2-8+16) +2 =-3(x-4)^2+2 x=4,y=2
January 8, 2017

physics
vf=vi+at where a=force/mass=-mu*weight/(weight/g) = -mu*g
January 8, 2017

Algebra
wish I had seen it, it wasted my time doing it again.
January 8, 2017

Algebra
(10T+1N)/(T+N) = 2 + 2/(T+N) or 10T+N=2T+2N+2 8T-N=2 T=1, N=6 will work in that last equation and check does 16 work in the problem statement (It does)
January 8, 2017

algebra
diagonal in opening: sqrt(36^2+24^2) 12*sqrt(9+4)=46.47inches Now diagonal of TV Now W=9/16 L we need width and Length. 42^2=w^2 + L^2 42^2=(9/16)^2 L^2 +L^2 L^2=42^2*(25/16)^2 L=42*5/4=52inches Too big.
January 8, 2017

Math
3! is a nice number here. Oh, you might not know about factorials yet. 3*2*1 is a nice number then.
January 8, 2017

Calculus
see other post.
January 8, 2017

calculus
x(1-x)=product dProduct/dx=1-x + x(-1)=0 -2x=-1 x=1/2 other number is 1/2 largest product is 1/4
January 8, 2017

calculus
V=4/3 PI r^3 dV/dt=4/3 PI * 3r^2 dr/dt solve for dr/dt dr/dt=dV/dt / 4PIr^2 Wondering why you did not round it up to .0025
January 8, 2017

finance
Easy. total sum beta now is (1.12*20-1.12+1.75)=23.03 portfolio beta now=23.03/20=1.15 Caution, if you had not vested equal amounts in each stock, the computation would have to weighed each beta to the value of the stocks, and it would be a little more complicated, but easy ...
January 8, 2017

  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. Next>>