Tuesday
August 30, 2016

Posts by bobpursley

Total # Posts: 41,696

Geometry
precision 120meters is to the nearest ten meters 7 1/4 is to the nearest 1/4 inch 30.0 mm is to the nearest .0001 (then thousandth) mm. This is the most precise of all three
August 29, 2016

math
it is called getting a common denominator, then eliminating it.
August 29, 2016

math
multiply each side by 15 3(x+2)=5(10-2x) 3x+6=50-10x subtract six from each side, add 10x to each side 13x=44 x=44/13
August 29, 2016

math
The answer depends on what the number means.. 333 oranges can round to 330 oranges, or 300 oranges. It depends on the use of the information.
August 29, 2016

Math
I vote for 43^5 which is greater than 147 million. = 147008443 and it is odd.
August 29, 2016

maths need helper
cosine of any angle has the range from -1 to +1, it can never be 200.
August 29, 2016

Physics
No, his average velocity was 5m/s. He started at zero, had constant acceleration, so he had to be at 10m/s at the end (so his average was 5m/s)
August 29, 2016

Algebra2
A
August 29, 2016

Physics
yes, "cross multipy). I didn't check your math, looks right. Now write in in satandard quadratic form, and solve for p with the quadratic equation
August 29, 2016

Physics
where is the force on a + test charge = to zero. Has to be right of the electron. E=kq/r^2 put the test charge at p, to the right of the electron, E=k(4q)/(p-4.5)^2-kq/(p-6.5)^2 if E is zero, then 4/(p-4.5)^2=1/(p-6.5)^2 now solve for p
August 29, 2016

Criminal Procedure
overt
August 29, 2016

Math
effort? effect makes no sense. Usually true. One could better specify what "improved performance" means, and I would be happier. improved performance is NOT better grades, usually.
August 29, 2016

Ethics and Communication
Or you are a teacher who is supposed to cover a set curricula in a year, yet two of your students are not getting it at that pace?
August 29, 2016

math
put this into your google search engine window: .15 * (𝐷𝑎𝑖𝑙𝑦 𝑎𝑣𝑔) + .65 *(𝐸𝑥𝑎𝑚 1 + 𝐸𝑥𝑎𝑚 2 + 𝐸𝑥𝑎𝑚 3 + 𝐸&#...
August 29, 2016

science
tan45=horizontalforce/vertical force horizontal force=2*9.8*tan45 N
August 29, 2016

physics
what is sqrt(1800^2+(1000*9.8)^2) assuming the straight line is horizontal.
August 29, 2016

science
Lemons, limes, avocados and kiwi are categorized as highly alkaline fruits and are therefore non-acidic. Other non-acidic fruits include bananas, cantaloupe, apples, coconut, grapefruit, grapes, oranges and watermelon. Alfalfa sprouts, artichokes, asparagus, bamboo shoots, ...
August 29, 2016

Math. Need help
Put in the values given, and compute. I will do one as an example: Evaluate (g + h)^2 + 10 divided by h if g = 3 and h = 5. (g+h)^2 + 10/h= (8)^2 + 10/5= 64+2=66
August 28, 2016

Bio physics chemistry pre medical
http://www.jiskha.com/display.cgi?id=1472400718
August 28, 2016

Bio physics chemistry pre medical
figure the mole mass of C20H30O? then number= .005/molmass * avagnumber
August 28, 2016

Bio physics chemistry pre medical
see other post.
August 28, 2016

Physics
4. speed of ball at 2 sec. The horizontal speed is same, v(t)=vi-g(r), then compute the speed from those two components. 5. At the top, PE = initial KE in vertical mgh=1/2 m vi'^2 where vi is initial vertical velocity, solve for h.
August 28, 2016

physics
I agree with STeve if the problem had said average speed of 48, but it said avg velocity. Winding roads reduce avg velocity considerably from avg speed.
August 28, 2016

physics
This cannot be determined from the problem.
August 28, 2016

math
5000 is an integer
August 28, 2016

Physics
well, his W directoin component has to be 120, and then a N componetn of 120. avg velocity=120sqrt2, heading 45 deg W of N.
August 28, 2016

Physics
It cant be done.
August 28, 2016

Honors Physics
You can weight the truck empty, the mass it after the tanks are filled, all on a certified scale.
August 28, 2016

Chemistry
There is more energy in the H-Cl bond than the H bond in the COOH bond. in the COOH bond, the dissociation of the OH group to release a H bond is not great. It is a "weak" acid.
August 27, 2016

Algebra
radius=sqrt(5^2 + 5^2)=5sqrt2 (y-2)^2 + (x-1)^2=(5sqrt2)^2
August 26, 2016

Riddle
What is an Hourglass?
August 26, 2016

english
Yes, it must be swollen. So Art, I hope you see that the first sentence is probably what you want to use, not the second (unless her wrist really is 100 lbs). mis·placed mod·i·fi·er plural noun: misplaced modifiers a phrase or clause placed ...
August 26, 2016

English 1
And another purpose of reading groups is ...the phrase comes from Jane Austen in Pride and Prejudice...you can find kindred spirits in a reading group.
August 26, 2016

algebra
you are correct on all, if on number 1 you meant a
August 26, 2016

Algebra
-11ft/second
August 26, 2016

physics
all will be rounded upward. I can check your work. Now on the first, the common rule is if the estimated digit is 5, round up, and in the first one 3.7 However, this forces you to round up 5/9 of the time, and forces a bias upward. So some thinking texts change that rounding ...
August 26, 2016

Math
93*5= 83+93+95+95 + T solve for T
August 26, 2016

Precalculus
Isn't this a straight line, horizontal, at y=5?
August 26, 2016

Physics
MASSWATER=MASSTANKFILLED-EMPTY
August 26, 2016

value
logx+logy=4logx+2logy=3 ??? is the first equals sign a + ? If so, then log(x*y*x^4*y^2=3 log (x^5 y^3)=3 and you can take the antilog x^5y^3=1000
August 26, 2016

Math
.5/(q+2)
August 25, 2016

Math
what is 4 or 6?
August 25, 2016

Math
2/3 + 1/12=9/12+1/12=9/12 eaten. How much is left?
August 25, 2016

Social studies
http://www.jiskha.com/display.cgi?id=1377742894
August 25, 2016

Retailing
I like A best. B is wrong. C,D one can organize by a multitude of criteria.
August 25, 2016

7th grade math
change to improper fractions; 11/6 divided by 27/5 NOW MEMORIZE THIS: Division is the multiplication of the inverse, or 11/6 multiplied by 5/27 is the same as your problem. 55/162
August 25, 2016

Calculus
Volume=4/3 PI r^3 dV/dt=5=4 PI r^2 dr/dt you are given dr/dt = 3ft/min and dv/dt=5ft^3/min solve for r, and then calculate V
August 25, 2016

Math
The mantissa is negative. For instance log .002= log(10*-3*2) = log(10^-3) + log 2= -3+.3020 = -2.69 in your example log(xxxx*zzz/yyy)=log xxxx + logzzzz- log yyyy which means log(10^-2)+log1.6 + log(10^-2)+log8.4 - [log(10^-1) +log(4.8) but you donly do that way if you are ...
August 25, 2016

Representing numbers
word form: Seventy-six thousand, two hundred and thirty-nine 7-10thousands 6- thousands 2 hundreds 3 tens 9 ones
August 24, 2016

Science
you are reducing it 50 times. that means 1 part original, and 49 parts water. So add 49*30ml water. Actually, don't add the water. always add acid to the water.
August 24, 2016

maths
By inspection, x=4 2^2 + 3^2=4+9=13
August 24, 2016

Math
-6< abs(8)
August 24, 2016

PHYSICS
the acceleration of the bucket is a=angular acceleartion of cylnder*radius torque=I*angacceleration 3g*radius=1/2 m r^2*alpha solve for angacceleration. a= angacceleration*radiuscyclinder Tension=mg-ma KE=1/2 I w^2 where w=angacceleration*time
August 24, 2016

physics vectors
it is difficult to help without a diagram. Break the tension in each string into vertical and horizontal components. Then The sum the horizontal components is zero. The sum of the vertical components is equal to m*g This will lead to a solution.
August 24, 2016

7th grade Social Studies
Lily, this reading is way above 7th grade reading level. Let me guide you thru... According to Machiavelli, the best rulers are (Because the magistrates do not exact honor (require honor) from people against their will, the people honor them willingly as they should.) which of...
August 24, 2016

Math
avgDonation...including those who gave zero...= 1500+/25 and that will be the lowest average.
August 24, 2016

Math
what is 75.625/1.375 * 1 gram Ca ?
August 24, 2016

Science
avg=8m/s avg=8m/s*1km/1000m*3600sec/hr=8*3.6km/hr
August 24, 2016

SCIENCE
c, yes. Hydrogen gas Zn+2HCl>>ZnCl2 + H2
August 24, 2016

science
the angle of the board is arcsin(.25) mu=tangent(arcsin(.25)) force down the plane=mgSinTheta force normal: mgCosTheta friction up plane: mg*mu*cosTheta movement occurs when force down >friction or mgSinTheta=>mg*mu*CosTheta or mu=TanTheta
August 24, 2016

physics
density=mass/volume=1000g/(8*20*10)cm^3
August 24, 2016

physics
rate of mass change: .360cm/s*(12.3*13.7)cm^2 * .02g/50mm^3 * (10mm/1cm)^3 * 1kg/1000g* 60sec/min Put this in your google search window: .360*12.3*13.7*.02/50*10^3/1000*60=
August 24, 2016

Math
distance=15 + 27*time
August 23, 2016

Science
control group: unradiated mice independent variable: 10 sec exposure dependent variable: ability to get to food Statistics plays an important part here. With only ten mice, the standard deviation is huge. The difference between 7 and 8 is insignificant, and no conclusion can ...
August 23, 2016

science
balance the equation P4 + 6Cl2 >>> 4PCl3 moles P4= 125/30.9 about 4 moles Cl2= 323/70 about 4.5 we need six moles Cl2 for each mole of P4, so we have an excess of P4. max moles P4 used: 323/(70*6) then convert that to mass mass remaining=125-max used
August 23, 2016

MATHS
Rama=R Radha=A A-10=1/2 * R R-10=1/3 * A then 2A-R=20 -A+3R=30 check those, then solve
August 23, 2016

administration
e-ticket = electronic ticket, which is in the dictionary.
August 23, 2016

administration
two.
August 23, 2016

waketech
cords: (88x88x33)/(128/27)
August 23, 2016

biology
you are missing the second. Shallow water on a hot day absorbs a lot of heat, to keep temps mild, the water has to heat up. So the high specific heat of water is important. There is a large body of water which this is an actual issue: the Persian Gulf, which is quite shallow, ...
August 23, 2016

math data management
The probability of any one getting correct with five possible answers is .2, and to make a 60 she has to get four more right. P(4 correct)=8C4*(.2)^4(.8)^4= = 8*7*6*5/4*3*2*1 (.2)^4 * (.8)^4 = 7*2*5 * (.2)^4 (.8)^4 = 70 * 0.00065536 = 0.0458752 Now if you wanted to calculate ...
August 23, 2016

physics
Two trains 200m and 300m are running towards each other What does 200m and 300 m refer to?
August 23, 2016

home project
and the shape of the tiles.
August 23, 2016

world geography
Folk culture refers to the unifying expressive components of everyday life as enacted by localized, tradition-bound groups. So you are correct.
August 23, 2016

math
what is 4 and 2?
August 23, 2016

Algebra PLEASE HELP ASAP MS.SUE PLEASE HELP
on the first, if it is 5.5 x sqrt5, because sqrt5 is irrational, multiplying it by anything still yields an irrational number On the cereals, I would read the nutrition labels first. Most likely, none of them are a "best buy". However, I understand the teacher is ...
August 23, 2016

world geography damon
9th grader: Here are two words you should look up and think on: ethnocentrism racism
August 23, 2016

Math
A, B, C, D, E, F, G ? Or give them names of Nobel Prize Winners.
August 23, 2016

science
neither. this is an acid/base neutralization reaction, and none of the species changes oxidation numbers. N is -3 on the left, and N is -3 on the right. S, O remain the same, as does H. 2NH3 + H2SO4 >> (NH4)2SO4
August 23, 2016

science
5 grams. Think.
August 23, 2016

science
disregard that diagram, it came out way wrong.
August 23, 2016

science
well, Dimethyldichlorosilane , you have the formula wrong, consider Si(CH3)2Cl2 as you can see from this Si has four things attached to it, two methyl groups, and two Cl- ions. Si must be +4 CH3 CH3-Si=Cl Cl
August 23, 2016

Physics
a. displacement = 0, it is at the same position as when it started. b. df=di+vi*t-1/2 g t^2 df=di=0 solve for vi. I have no idea why you were told to use g=10, it is not that value anywhere on Earth. Nor is PI equal to 3 c. at the top, velocity is zero, so vf=0=vi-gt hwere t=...
August 23, 2016

Physics
The other angle is 60 deg. Now figure velocity knowing that.
August 23, 2016

science
http://chem.libretexts.org/Core/Analytical_Chemistry/Electrochemistry/Redox_Chemistry/Balancing_Redox_reactions Go thru these examples. Use the REDOX rules (all 7 of them).
August 22, 2016

chemistry
For the life of me, I don't understand your question.
August 22, 2016

science
https://answers.yahoo.com/question/index?qid=20100221041104AAdZqta
August 22, 2016

physics
change In PE=change in KE mg*.8=1/2 m v^2 + 1/2 I w^2 but w=v/r so w^2=v^2/r^2 and I= 1/2 m r^2 so mg*.8=1/2 m v^2 + 1/4 mv^2 solve for v. Notice the mass m divides out.
August 22, 2016

Math
W-30=D w-15=2(D-15) subtract the equations: -30+15=D-2D+30 D=30+15=45 W=75
August 22, 2016

Math
cumulative: 49 1 59 3 69 5 79 12 89 21 99 30 so graph that. Now describe it.
August 22, 2016

Science
Understand the hazards encountered in the lab. protect your skin, lungs, eyes, and hearing during the investigation. Protect your clothing. Be aware of your partner. after: cleanup, label all products correctly, store chemicals and materials properly.
August 22, 2016

Chemistry
for each six moles of CO2, you get one mole of Glucose moles of CO2: 18/molmassCO2 divide by six moles of glucose: 3/molmassCO2 grams of glucose: molemassGlucose*moles of glucose
August 22, 2016

Science
correct. "Control" is a very non-scientific term.
August 22, 2016

Language Arts, help a.s.a.p.
the first is resolution, the others are correct.
August 22, 2016

Georgia Geography
you are wrong on the first, right on second. Reread my answers, I said that.
August 22, 2016

Georgia Geography
The soils in the Plateau are sandy, thin, and acidic, and sandstone rocks are prolific.
August 22, 2016

Georgia Geography
"high"...you must be kidding. Visit the Rockies to see high. Now granite quarries is most interesting, explore where granite is mined in Georgia. google: Valley and Ridge region Georgia Granite.
August 22, 2016

physics
Yes, completely immersed. Think why...
August 22, 2016

physics
For the life of me, I dont understand when the retarding force begins.
August 22, 2016

socal studies
I dont like any of the answers. Elections are necessary to insure that the elected "representatives" are accountable to the majority of the election unit. Along with this, it is necessary for the election unit be compromised of a valid cross-section of voters, ...
August 22, 2016

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