Friday
August 1, 2014

Posts by bobpursley


Total # Posts: 35,693

Calculus
http://www.intmath.com/integration/6-simpsons-rule.php

physics
What is mg-5N ?

physics
what is .120*g*(5.4-2.9)

English
http://classicsnetwork.com/essays/the-unfulfilled-fairytale-in-great/396

physics
add the heat required to get from 80C to `100C, then to vaporize the 50g.

physics
upon reflection on the inner surface, another 180deg shift occurs, so the path lenght is 3.0 wavelength, so it is constructive interference.

physics
sin 24.4=.413 1/sin 24.4= 2.42 Does that index of refraction mean anything? Go thru Snell's law.

Physics
time to crash: distance/velocity=153km/260km/hr=.588hr distance from calagary: 140*.588 km

Ecology
yes.

Health
I think D is the best answer.

CHEMISTRY
mole fractions are proportional to temp: find total moles: n=PV/RT where P=.94ATM n1/n=.72/.94

Chem
In the freenergy equation G=H+TS set G=0, solve for Temp If Temp is increased, G goes more negative, so the reaction goes to completion.

math
Pf(you win, frined loses)=1/1O*9/10

Chemistry
yes.

chemistry
V1/V2=T1/T2 temps in Kelvins

inorganic chemistry
4>1 4>3 3>2 2>1 4>2 3>1

math
you want to dilute it 32/12 times, or 8/3 or 2.666 times. That means you want to add one part original, and 1.666 parts water. one part= 18 quarts 1.666 parts= 30 parts water

Acc. PreCalculus
1. 5!3! 5! + 3! 2. two sided dice, wondering if 9 is on one face, two faces, or none.

math
1. combined rate=1/F +.5/F=1.5/F=1/6 f=9 hrs D-5=P D+5=2P subtract second equation from first -10=-P P is 10 now, so D is 15

Science
if you need more, here is the source Dr Sarah, MD gave you : http://www.anaesthesiamcq.com/AcidBaseBook/ab4_5.php

Science
Dr Sarah can you respond to this?

sciecne
angle of è = 25° as shown; without the angle, impossible for me to decipher.

College Physics 2
Find the resonant frequency of a circuit that has a 400 mH inductor and a 30 nF capacitor connected in series. f= .159/sqrt(LC) A) Canadian FM radio station (CLAW) broadcasts lobster information at 95.9 MHz. find the wavelength of this station. freq*wavelength=speedlight B) Wh...

Science
I agree B,

Biology/Help
Ear wax is 20 to 50 percent fat, and it coats the ear canal to moisturize it, fight off infection, and help keep dust, dirt, and other debris from getting deep inside your ear. B is the best answer above, but it is really not a good answer, as it misses the point.

PHYSICS
number of revolutions: d=avgspeed*time=1500rpm*2/60 min acceleration: wf=wi+at a= (wf-wi)/t=600rpm*2PIrad/rev*1m/60sec*1/2sec

math
In 1.5 hours, Tony can do one pool Sue can do 2 pools Jim can do 3 pools pools=rate*time combined rate=6pools/1.5 hrs=4pools/hr time=pools/rate= 1pool/(4pools/hr)=1/4 hr= 15 min

math
M/W=5/8 (M-30)/(W-10)=1/2 putting from the first equation M=5W/8 into the second equation (5W/8-30)2=W-20 solve for W, then go back in the first equation and solve for M

math
This makes absolutely no sense to me, certainly not as a math problem. It makes no sense to me as an electrical engineer, either.

math
the first digits greater then 600 has to be 7xx, or 9xx the second digit, and the third can be 1,3,5,7,9 or five possibilities. So how many? 2 x 5 x 5 or fifty.

Geometry
I dont understand "horizontal base' when applied to a trefoil

College Physics 2
freq*wavelength=speed of light

College English
Did you discuss "Edwards’ use of the metaphors of storm and thunder, flood and fire. " ?

physics
a. KE=1/2 m v2 b. Force*distance=1/2 m v^2

counseling
convergent evidence?

PHI 208 final exam
What about the morality of cheating?

CRJ
character traits http://www.readwritethink.org/files/resources/lesson_images/lesson175/traits.pdf

cognictive and language development
You have to be kidding. Ok, a complex cognative skill...doing a calculus piecewise integration? Go for B. http://en.wikipedia.org/wiki/Bayley_Scales_of_Infant_Development

math
what is .65*145?

SAT
correct

HSM
Budget resolution?

english
fulfill underlying wishes. However, Freud's concept never did explain those dreams I had reliving Vietnam horrors.

english
see other post

Biology
I think I would go for B

Biology
I agree.

Science
They are not science symbols.

Intro to computers
DOS

geography,maths lit,life science and agriculture
do a little research. Start with careers geography

Statistics
1) 3(2-y) - 2y=1 solve for y

Physics 2
You need to be introduced to the wave equation: frequency*wavelength= speedofLight

Physics 2
oops, the inverse of that.

Physics 2
index=speed/speedlight

Physics 2
didn't I just answer this?

physics
for heat flow rate (conduction) thru the copper, wouldn't it matter how "partially immersed" it is?

physics
charge=chargeononeelectron*500mg/massoneelectron

Economics
income flows from the richer to the poorer.

physics
the current is generating a magnetic field itself.

science
molarity=moles/volume assume 1.000 liters, 1190grams. of that, .38*1190 = mass HCL moles HCl= massHCl/38 figure molarity from that. I get about 12M Now, knowing the original molarity, say it is 12 (you better work that out), then you are trying to dilute it 12/.1 or 120 times,...

chemistry
concentration=37/(111+37)

home economics
very false

College Algebra
7200=1(1+ .075/4)^t/4 where t is in years. You actually want one dollar to grow to 7500? take log of each side log 7200=t/4 (log 1.018) t=4* log7200/log1.018=1991 years

personality and Social Development
yes.

College Algebra
fence=PI*(r^2) where 70=PI*2r or r=35/PI

American History
absolutely C

physics
a. time=distance/velocity=60.5/139 seconds b. drop= 4.9t^2 c. what is 5.3+.833- drop?

physics
hf=hi+vi*t-4.9t^2 4=0+vi*1.5 - 4.9*(1.5)^2 solve for vi

physics
mgh=1/2 m v^2 v= sqrt(2gh) where h is the distance of the fall.

physics
kristen, think this out. Remember Newtonn's laws of motion? Velocity has nothing to do with motion, it is change of velocity that requires force (first law). We call change of velocity acceleartion. F=ma (second law)

physics
no

physics
no again

physics
wondering which way the acceleration is..it matters. Assuming upwards, Tension=mg+ma

physics
I have no idea what you asked.

economics
This is rather broad. Can you limit the subject some? South African government is providing gold to the World Bank, and diamonds to the Dutch, and ...

chemistry
Ca(OH)2 + 2 HCl >> CaCl2+ 2 H20 so moles HCl = 2*moles calcium hydroxide = 2*1.50/74 VolumeHCl=MolesHCl/concentration= =2*1.50/(74*.250)

Science
see other post http://www.jiskha.com/display.cgi?id=1406273329

math
M1=20+6w M2=150+4w set them equal 20+6w=150+4w 2w=130 w=?

studing to take an exam
http://www3.niu.edu/acad/psych/Millis/History/2002/Abnormal.htm

Algebra
yes, of course.

Algebra
normally, the y is height, and x is time.

Algebra
The constant it the height at time zero. The coefficient of the t function is the initial velocity. Answer c seems realistic

Algebra
which equations...

college English
You need to determine from your class reading which Winthrop it is refering to, and how it relates to culture and govenment.

college English
Huh? Exactly which Wintrop are you citing? I strongly suggest you have the wrong one, take a look at Theory Culture Society, written by Geoffrey Winthrop-Young. you described General Winthrop's work. Brigadier Lieutenant John Winthrop Hackett was in the 4th Parachute Briga...

science
If it is in three orthagonal dimensions, you have to sqrt((140^2)+50^2 + 0^2)

science
b. c. a and d are nor revealing to determine elasticity.

PhysicsI
heat released=50*heatvaporizatioin look up the heat of vaporization of water. Then, set that heat to = 100*specificeheatwater*deltaTemp solve for deltaTemp

College Algebra
g(x)=logbase7(x)

College Algebra
p(x) = for x<0, p(x)=3 for x>0, P(x)=2x+1

CURVE SKETCHING PLEASE HELP
set the first derivative to zero, and solve. Those are the maxima/minima then, find the value of the function at those maxima/minima. Now, find the zeroes. set the function=0, solve for the zeroes. Now, find the second derivative, solve when it is zero, that is the inflection ...

Phycis
2AgNO3+Na2CO3>>Ag2CO3 (s) + 2NaNO3

Probability
30/54 * 1140=633

Technology
The key here Pascal's principle: the pressure is the same throughout the system. P1=P2 F1/Area1=F2/Area2 let piston 2 be the small F2= F1( area2/area1)=20N*(2m^2/4m^2)=10N

pol 201
Rather Esoteric essay, actually. What should or should not be is seldom considered by arguments in our political country, it comes down to be an exercise of poltical power. My thinking on the above, is how would the limits of judicial review be monitored, and by whom? the Pres...

physics
Hmm. add the charges, and if the spheres are idential, divide by two to find the charge on each sphere. 12+ -7=5c 2.5 C on each one if the spheres were identical.

Physics
change km/hr to m/s Vf=Vi+at=Vi+Force/mass * time solve for force.

Identify the regular verb or verb phrase
learned is a regular verb learned from priests and other church officials is the verb phrase

quant
Is there a question here? wondering if setting goals and managing to them is included.

math
1/4 P=2oz P= 8 oz

Science/Biology/Physics
What is your thinking on these?

math
Hmmm. wondering what happened to 20 of the bags per 220 220=30+60+110=200 short 20 bags.

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