Thursday

November 26, 2015
Total # Posts: 38,715

**PHYSICS**

4/5 of the original
*November 23, 2015*

**PHYSICS**

10/2
*November 23, 2015*

**CHEMISTY**

Va*Ma=Vb*Mb Ma=Vb/Va *Mb=43.3/25 *.101=.17M check that
*November 21, 2015*

**science help**

nope. where doe rain enter?
*November 21, 2015*

**geometry**

factor? it is a difference of two squares. (4n-3)(4n+3)
*November 19, 2015*

**Math**

let the sides be 2x, 4x, 5x so then Perimeter=11x and 5x-33=2x solve for x, then go back and calculate 2x, 4x, and 5x, then add them to get the perimeter. Easy as apple pie.
*November 19, 2015*

**geometry**

difference of two squares.. (4n-3)(4n+3)
*November 19, 2015*

**geometry**

difference of two squares (x+10)(x-10)
*November 19, 2015*

**math fractions**

4/5 M remains after she bought school stukff 5/8*4/5 M remains and is equal to 25
*November 19, 2015*

**SCIENCE**

I agree.
*November 19, 2015*

**Algebra 2**

NO, NO , NO. f(x)=0=x^6-64 x^6=64 take sixth root of each side, x=+-2 Now there are other roots, but not real, I suspect you have not had DeMoirves theorem, but in polar comples plane x^6=64@360deg x=2@n60 where n=0,1,2,3,4,5, and the n=0 or 3 gives the +-2 real roosts, with ...
*November 19, 2015*

**multiple choice economics**

one final note: demand for goods may be inelastic at lower prices, but elastic at higher prices. This is true often for perceived necessities. Sometime price changes the perceptions also. Go with answer a.
*November 19, 2015*

**multiple choice economics**

Let me point out something on Alyssa's response: Gasoline consumption rises when the price declines, and lowers when the price goes up. The same happens to bread and milk, ask any grocery store. Currently, Eggs are up in price, and demand has lessened. In cities, bus ...
*November 19, 2015*

**multiple choice economics**

Ahhh,the Apple watch, and most Apple products. D would be right if the price falls. But what if the Apple watch were priced at 1099 dollars? it wont be purchased by some, so answer a) is more realistic, the demand becomes elastic.
*November 19, 2015*

**Physics**

you have to specify a length for the standard (lead) if you want a number length. Otherwise, you have to just cite a fraction of Length lead.
*November 19, 2015*

**Physics**

Ok, decide on the length of lead rod first. Then use the formula for the other rods like this (for the brass first) Lbrass=Llead*densitylead/densitybrass
*November 19, 2015*

**Physics**

Ok, then the mass is the same, so length is inversly prop to density. take the brass/lead combo. if the lead say is some length L, then the length of the brass (to have the same mass of lead) masslead=massbrass PI r^2 Llead*densitylead=PI r^2 Lbrass*Dbrass or Lbrass=Llead*...
*November 19, 2015*

**Physics**

I dont know what the objective is. Is it to have the rods the same mass? IF so, then the length is inversely proportional to density, to keekp mass constant. Mass=volume*density=L*area*density
*November 19, 2015*

**European History**

your question and MsSue's remark reminds me of the philosophy 101 questions: How should one react to evil? How should one do good? How should one accept death? There is no right answer.
*November 19, 2015*

**European History**

And remember "should" and "could" are different.
*November 19, 2015*

**Algebra 2**

I dont think so, lets look 3x^2+2x-1=0 x^2+2/3 x =1 x^2+2/3 x +1/9=10/9 (x+1/3)^2= 10/9 x+1/3 = +- 1/3 sqrt 10 x=-1/3 +- 1/3 sqrt10 check that.
*November 19, 2015*

**Geometry**

opps, I gave you the volume of the sphere, which is the amount of water that will be displaced by the sphere. If the cylinder was filled, and the sphere dropped in, then the volume of the sphere is the volume of the water which spills over.
*November 19, 2015*

**Geometry**

what is the volume of the cylinder? 4/3 PI r^3
*November 19, 2015*

**Math**

I would EXPECT 100 on the average, but I would expect the actual number to be within sthree standard deviations of that. The students arror is understanding what expected value is versus samples.
*November 19, 2015*

**Algebra**

I weould rather be checking your answers.
*November 19, 2015*

**chemistry**

You have to know some data.
*November 19, 2015*

**History**

Good lord. first: correct second: correct third: Loyalists were loyal to King George fourth You have be kidding. My ancestors fought the last two years without food, shoes, and shirts. That is hardly improvement. last: None of the answers are good. The last answer is correct ...
*November 19, 2015*

**(RHIBMS)**

Is there a question here?
*November 19, 2015*

**Physics**

if angular momentum is conserved Initialangulmomentum=I*w = I*4 final angular momentum= 1/2 I * wf=I*4 wf=8 rad/sec
*November 19, 2015*

**Physics**

Doesn't matter, professor, the final speed is not only vertical component, but includes horizontal component. I think in your solution you solved only for the final vertical component. In vector mechanics, the acceleration* distance is actually a dot product, and in this ...
*November 19, 2015*

**Physics**

It is easiest by considering energy. final KE=initial KE + intial PE 1/2 m vf^2=1/2 m vi^2 + mgh if you do some algebra, this will become vf^2=vi^2 + 2gh h=2, g=9.8 vi=15 solve for vf
*November 19, 2015*

**Chemistry**

google "metalloids"
*November 19, 2015*

**Social Studies.**

Really a trick (poor question). Jefferson wrote the rough draft, then a committee was formed (which included Adams and Franklin and others) to finish it. That document was approved by the Congress. Jefferson was not satisfied, and vehemently raised his objections. The Congress...
*November 19, 2015*

**Chemistry**

There were gaps there because the elements had not been discovered as of then. Later on, those gaps were confirmed his prediotions, and the validity of his periodic model.
*November 19, 2015*

**Chemistry**

You have it messed up. Learn to do it this way. NormalityAcid=NormalBAse If you dont know how to convert M to N, learn that. In this case, they are the same. NormalityHCL*volumeAcit=.175*20.50 MolarityHCL=.175*20.5ml*M/25.0ml and you have it. it is not your answer above.
*November 19, 2015*

**Physics**

draw the figure. You have two sides, and the included angle. Use the law of cosines to find the side opposite.
*November 18, 2015*

**Math PLZ HELP NOW!!**

Wondering what the problem is? Simplify? a^2(7a^2+3) ?
*November 18, 2015*

**Algebra 1**

let F be the number of five point questions, and T be the other. 5F+2T=100 F+T=38 can you take it from there?
*November 18, 2015*

**Physics**

Thanks. Is there a question here? Such as what is the coefficent of friction? Vf^2=Vi^2+ 2ad where a=mu*mg/m=mu*g 0=1.1^2+2mu*g *"(- 2.10_ solve for mu
*November 18, 2015*

**science**

well, molarity is moles/liter so somehow we have to turn liters of solution to mass. grams of solute=2*39+32+64 * .4=179*.4= grams of solute=71.6 grams check that. approximate grams of water=1000. So looking at those, it appears the density of the solution is very close to ...
*November 18, 2015*

**Chemistry**

PV=nRT P=1atm, T=273 n=5.5/molemassCO2=5.5/44 check that. solve for V
*November 17, 2015*

**science**

valence electrons?
*November 17, 2015*

**Trig right triangle**

Not a right triangle, where in the world did you get that idea? Draw the figure. Make a triangle. Do you know the law of sine and the law of cosines? If so, figure the distance of the two legs from speed and time, then use the law of sines to figure the other two angles in the...
*November 17, 2015*

**Science**

your answers are ok, but you need to learn to put thoughts into your own words, not others words.
*November 17, 2015*

**Science**

air fills the tank. volume doubles. Nuts to your answer.
*November 17, 2015*

**PHYSICS**

Mice*Hfwater=2.47*Hvwater solve for mass ice Mice.
*November 17, 2015*

**PHYSICS**

use this formula, and memorize it. Period=2PI sqrt(length/g) solve for g Period is 4.5 seconds
*November 17, 2015*

**Physics**

The sum of heats added is zero . heat added to ice+heatadded to water=0 first assumption: assume all the ice melts, if there is a solution below zero, you know that can't be . heating up ice+heat ice melting+heat ice water heating+heatoriginal water=0 7.20*Cice*(0-(-5)+ 7....
*November 17, 2015*

**physics**

the pressure on each piston is the same: Pressure=force/area force2/area2=force1/area1 force1=1350*9.8N * (5/15)^2
*November 17, 2015*

**physics**

so his his heading + wind=345 let Theta be his heading steered. 600sinTheta W + 600cosTheta E + 70 sin20 E + 70 cos 20 N=SOG*sin345 W + SOG cos345 N (SOG is speed over grund) set the components equal West: 600 sinTheta W+70cos20 E=sog sin345 W or change the second direction E ...
*November 15, 2015*

**math**

I will do some of these. graph is above x axis when x^2-4>0 or x^2>4 or -2>x>2 when below x^2-4<0 x^2<4 -2<x<2 when increasing: (x+e)^2-4>x^2-4 where e is a very small number Now expanding x^2+2xe+e^2-4-x^2+4>0 2xe+e^2>0 because e is always a ...
*November 15, 2015*

**Physics HELP**

Vector sum them: 10E+18N+20(-E)=18N-10E that is the vector displacement. In geo coordinates, find direction: arcTan(-10/20)=-26 deg or 360-26=direction 334 (from 000, North). find magnitude: sqrt(10^2+20^2)=sqrt 300=10sqrt3 geographic displacement=10sqrt3 @ 334 check my work, ...
*November 15, 2015*

**science**

you are diluting it 10/8 times=1.25 times. That means, one part original solution, and .25 parts water. that means then add 50 grams water. check: original salt mass=20g new salt mass=.08*250=20g
*November 15, 2015*

**Physics**

The shell will expand the exact amount as if it were a solid sphere. use the volume equation.
*November 15, 2015*

**Algebra**

see other question, I juskt answered it.
*November 12, 2015*

**Physics**

Gravity=centripetal force GmMe/r^2=m v^2/r v^2=GMe/r r is the orbital radius, solve for v
*November 12, 2015*

**Science**

Correct, very false
*November 12, 2015*

**Science**

They have to flow in a circuit.
*November 12, 2015*

**Science**

in a battery, electrons flow from the negative terminal to the positive. In AC, it alternates 120 times per second (60 times persecond one way, 60 times the other way each second)
*November 12, 2015*

**Science**

electron affinity: the strength of the ability to capture electrons in its outermost orbit. The greater the difference in metal affinities, the greater the voltage.
*November 12, 2015*

**Geography**

Isn't this a bit theoretical? Those people were interred, beaten, spit on, reduced to animals. What could they have done? Lord only knows. https://gtmoinnola.wordpress.com/portfolio/hiv-positive-haitian-refugees-at-gtmo/
*November 12, 2015*

**Math**

the first is a line downward, going thru (o,9) and (6,-9) the second is a line going upward, with a slope of 3
*November 12, 2015*

**Chemistry**

you err on the right side. H is zero (free element). H was reduced, it gained electrons.
*November 12, 2015*

**chemestry**

first, find the moles of N2 n=PV/RT then, the mass=molecularwtN2*n finally, density=mass/8 liters
*November 12, 2015*

**statistics**

You didn't post the mean score of the five. 88=(5*meanscore + 1*SCORE)/6 solve for score
*November 12, 2015*

**Math**

Readaing this, something is missing.
*November 12, 2015*

**MATH**

Math? Somebody is not thinking. Your question does not make sense to me. It reads to me as some who does not know chem is mixing up stuff to see what happens. Caution: Hydrogen peroxide, and ammonium hydroxide can cause splatter damage to eyes and skin. DON"T PLAY WITH ...
*November 12, 2015*

**chemistry**

No No NO. Use that equation to solve for ENERGY in each photon. Then, signal energy=energyinPhoton*numbphotons solve fornumbphotons
*November 11, 2015*

**math**

the situation is something always less than x by eight.
*November 11, 2015*

**Physics**

momentum is conserved, and since two pieces are in the direction of initial movement, the third cannot be in another track, it has to be in the same direction Momentum: 2.1E6*5E6=4.8E5*(-2.3E6)+8.4E5*1E6+(2.1E6-4.8E5-8.4E5)V solve for V
*November 11, 2015*

**Algebra**

Visualize a 3-4-5 right triangle (same as a 6-8-10 triangle)
*November 11, 2015*

**top ville college**

you get (balance the equation) .5 moles of CO2, or 22.4/2 liters at STP NaHCO3>>Co2 + NaOH
*November 11, 2015*

**Physics**

I dont know how todraw it on this forum. Plot velocity from the given information.
*November 11, 2015*

**molate high school**

Career Path? The first thing I would ask is what do like to do? what do you not like to do? What are you best at? What are you not so good at? Do you like outide or inside? do you like working alone or with people? Do you prefer working with things, or with ideas? Careers are ...
*November 10, 2015*

**Physics**

momenum applies 1000*VyEast+2000VrNorth=(3000)16 *(cos24 East + sin24 Nirth) Set the East components equal,and the N components equal, and solve for Vyellow and Vred
*November 10, 2015*

**Math**

Then you cannot find time. YOu do not know distance, or speed.
*November 9, 2015*

**Math**

I think we need to know Jamal's speed.
*November 9, 2015*

**math**

titration equation: Ma*Va=Mb*Vb Ma=.1*17.5ml/25.0
*November 9, 2015*

**Physics**

sum of forces: 50+180=f1+F2 where f2 and f1 are the men pushing upward. let f1=2F2 (given) f3 is the lighter load man. 50+180=3F2 f2=230/3 f1=460/3 sum moments (about the center of pole). 10F1-10F2+x180=0 you know f1, f2, solve for x
*November 9, 2015*

**Statistics**

6*36*36
*November 9, 2015*

**Science**

total useful energy=mg*119+1/2 m 48^2 chem energy=215J efficiency=useful energy/total chem energy
*November 9, 2015*

**Physics**

see other post
*November 9, 2015*

**AP Physics**

a. .45*mg b. .45*mg-.30mg=ma a= .15g
*November 8, 2015*

**Children with Special Needs**

special needs is a pretty broad area, frankly. You have to look at the specific need. Socialization of children with special needs, specifically mainstreaming is a good topic.
*November 8, 2015*

**early childhood**

Nonfiction for older readers? quite often there is a glossary. I would look for another answer.
*November 8, 2015*

**chemistry**

PV=nRT solve for temp (in Kelvins) Make certain you use R in torr, mol, liters
*November 8, 2015*

**Physics**

It depends on the angle the chairs are indicating
*November 8, 2015*

**Algebra 2**

and where is the graph?
*November 8, 2015*

**chemistry**

sulfates can be precipated easily.
*November 8, 2015*

**chemistry**

Wouldn't the few remaining silver ions in solution be also precipated...as silver chloride?
*November 8, 2015*

**Physics**

Assuming your part a is correct, now consider momenetum conservation. If vi is called the x direction, then momentum is conserved mvi=m(.94537)vi cosTheta11+m(.32599)vi*cosTheta2 and momentum in the perpendiuclar y directioni is conserved 0=m(.94537)vi*sinTheta1+m*.32599Vi*...
*November 8, 2015*

**physics**

1070g, of course
*November 8, 2015*

**phy**

angular acceleration=(vf-vi)/time change 72min to seconds, change velocities to radians/sec angacceleration=2PI/60 (480-210)/72*60
*November 8, 2015*

**Physics**

sum forces: Wheavy-Wlight=(SumMasses)acceleration. Now consider the tension to move the lighter upward tension=Wlight+MassLight*acceleration now consider the tension to keep the heavier from free falling tension=Wheavy-Massheavy*acceleration guess what? if you solve either of ...
*November 8, 2015*

**physics**

momentum=momentum 41.6*1.94=147*Vswing solve for the initial velociyt of the swing, Vswing. Now how high? it converts to graviational PE, or mgh=1/2 m vswing^2 solve for height h.
*November 8, 2015*

**Math**

It is not possible to answer this, as there are an infinite number of solutions. Each ship's position is an arc of radius 100ctnTheta (where theta is either 30 or 45). Then if each ship can be anywhere on its arc, the distance between those many possible positions is ...
*November 8, 2015*

**physics**

1/2 amplitude is the stretch, so at max stretch total energy is spring PE energy=1/2 k x^2=1/2 *166 *2.7^2
*November 8, 2015*

**Chemistry**

it is pretty dilute, if you assume the density of the solution is close to 1.00, then the amount of solvent added was 250 grams. Without other information, you have to assume that. molarity=molessolute/.250kg
*November 6, 2015*

**Language Arts**

Ok, now you have it. Yes on B. Yea for huevos Rancheros also
*November 6, 2015*

**Language Arts**

Have you ever been to a Thai restsurant? The red flame signs are NOT bland. Neither in Louisanna is Tabasco Saucs Bland. In general, adding spices makes bland food into interesting food with some taste... look how I make bland eggs interesting...http://www.foodnetwork.com/...
*November 6, 2015*