Friday

August 1, 2014

August 1, 2014

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.

**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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