Friday

November 27, 2015
Total # Posts: 225

**physics**

A 140 g arrow is shot vertically from a bow whose effective spring constant is 500 N/m. If the bow is drawn 60 cm before shooting the arrow,to what height does the arrow rise?
*April 1, 2012*

**chemistry**

my K value was right. My mistake was when I plugged my values from my ICE table into the expression I used 0.25x^2/1.35-x instead of just x^2/1.35-x. Everything else was right.Thanks anyway
*March 24, 2012*

**chemistry**

At 298 K, 1.35 mol BrCl(g) is introduced into a 12.0 L vessel, and equilibrium is established in the reaction. BrCl(g)-->0.5Br2(g) + 0.5Cl2(g) Calculate the amount of BrCl(g) present when equilibrium is established.(Use delta G[Br2(g)]=3.11kJ/mol and delta G[BrCl(g)=-0.98Kj...
*March 24, 2012*

**Physics**

The problem is the notation. That is not kilo-newtons, that is k hat newtons. it should be 8/(17*1*3)
*March 3, 2012*

**business**

The answer to 18 is A - pie chart
*February 10, 2012*

**geometry**

A park at the end of a city block is a right triangle with legs 150 ft and 200 ft long. Make a scale drawing of the park using the following scale 1in:300ft.
*February 1, 2012*

**chem**

I have to find the effective pH range of a buffer. I read that this optimal buffering occurs when the pH is within 1 pH unit from the pK value for the buffering system. But can anyone explain why its is optimal within 1 pH unit? Thanks.
*January 28, 2012*

**Science**

What is a reference point in determining force, velocity,speed?
*January 22, 2012*

**Science**

If a car is going 65mph makes a 90 degree, what changes?
*January 22, 2012*

**statistics**

8. Assume that the MM207 Student Data Set is a random sample of all Kaplan students; estimate the proportion of all Kaplan students who are male using a 90% level of confidence.
*January 18, 2012*

**math**

p=6s,for s
*January 16, 2012*

**physics**

If a sprinter’s velocity increases to three times the original velocity, by what factor does the kinetic energy increase?
*December 21, 2011*

**history**

why did people come to jamestown? Opitional homework question (If you read the book "Our Strange New Land" , why did elizabeth go to jamestown.
*November 30, 2011*

**chemistry**

dont i have to use 10.7 torr and convert it to atm,then it gives me o.01407..otherwise.my mol is a very big number..
*November 28, 2011*

**chemistry**

yeah ur right..it should be 0.0804 g/mL..sorry bout that..
*November 28, 2011*

**chemistry**

if u place 10 L of propanol (C3H8O)in a sealed room that is 7.5 m long , 3 m wide and 3 m high, will all the propanol eveporate?if some liquid remains, how much will there be?the vaopr pressure of propanol is 10.7 torr at 25 C, and the density if the liquid at this temperature...
*November 28, 2011*

**physics**

An airplane passenger carries a 250 N suitcase up the stairs, a displacement of 4.70 m vertically, and 5.30 m horizontally. How much work does the passenger do?
*November 16, 2011*

**Physics**

What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 28 km/h and the μs between tires and track is 0.28? (Answer must be in meters)
*November 8, 2011*

**calculus**

Find all discontinuities of the given function. Also, describe the discontinuities. f(x)= [(x-8)^2(x+3)(2x^2+3x-5)]/[(x+4)^2(2x+5)(x-3)(x^2-1)]
*October 15, 2011*

**Physics**

if the speed of the block is 9.5 m/s at the bottom of the ramp, from what height was the block released? what is the length of the ramp?" and i know that the mass is 7 kg, initial veloctity=0, it is frictionless, and inclined at an angle of 62 degreesif the speed of the ...
*October 3, 2011*

**physics 1**

a 5.00kg object placed on a frictionless horizontal table is connected to a string tat passes over a pulley and then is fastened to a hanging 9.00kg object.Find the acceleration of the two objects and the tension in the string.
*August 3, 2011*

**Math problems**

Pounds double 18 = 36 Odd number x 50 is 1 Means answer is £36.50
*June 5, 2011*

**Math problems**

£36.50
*June 5, 2011*

**Science**

If a 500kg horse is moving at a speed of 15 mph what is its kinetic magnitude?
*May 28, 2011*

**7th g science**

who is lonesome george?
*May 13, 2011*

**science**

why are most of the animals on the galapagos islands fearless of humans
*May 13, 2011*

**business communication**

The answer is A. defer to the hiring company to take control of the interview process
*April 6, 2011*

**physics**

y = Vi(t) + 1/2(a)(t^2) 400 = (0m/s)t + 1/2(9.8)(t^2) use the quadratic equation to solve for t
*March 8, 2011*

**math**

The opposite angles of a parallelogram are congruent. The adjacent angles are supplementary. If angle X measures 110 degrees, then what are the measures of angle Y and angle Z?
*March 1, 2011*

**Science**

How do i draw a genotype?
*February 15, 2011*

**Internet - IT**

Hi, Can some confirm that both the TCP/IP and OSI model are both examples reference models. I feel that both are reference models. And lastly is it right that, DHCP is a protocol that enables network devices to share a pool of IP addresses. and is a protocol that operates at ...
*February 5, 2011*

**Health**

It ask me describe the 3 elements of Health i got all but one and it wants me to define what mental health is.
*January 13, 2011*

**Math Problem Solving**

6n+(8n-2n)+3 ____________ 2 simplfy this expression
*December 21, 2010*

**Math Problem Solving**

6n+(8n-2n)+3/2
*December 21, 2010*

**Math Problem Solving**

6n+(8n-2n)+3/2
*December 21, 2010*

**6th grade**

If you throw 500 darts at a hexagonal shaped dart board, how many will land in the shaded area? hexagon is divided into 24 triangles. 6 are shaded and 18 are white
*December 21, 2010*

**physics**

the specific heat of the glass is 840 J/kg*C, it's in one of the tables in the book but it's really stupid how they don't give that with the problem
*December 13, 2010*

**college math**

Use the Reference Angle Theorem to find the exact value of sec(13 pi/6).
*December 11, 2010*

**Science**

Light is shone on a metal and photoelectrons are emitted, what are the three things which might cause the photoelectron emission to stop
*December 9, 2010*

**Math2**

if arc AC=140 degrees, what is angle ABC? if angle ABC=28 degrees, what is arc AC?
*December 5, 2010*

**10th grade**

if AB=3x-2 and BC=x+6, what is x?
*December 5, 2010*

**chemistry**

If the previous two people were to use common sense, they might realize that Nitroglycerin is made up of carbon, hydrogen, nitrogen, and oxygen. If you look in the {}, you will see the chemical symbol for Carbon (C), Hydrogen (H), Nitrogen (N), and Oxygen (O). And if you had ...
*September 24, 2010*

**algebra**

3x²-x=7 √x √7 3x-x=√7 2x=√7 x=√7/2 or x=1.32
*September 23, 2010*

**4th grade**

Copy and complete the table to represent the pattern in the figures. Write a rule. Figure 1 one triangle Figure 2 3 triangles(in a pyramid shape) Figure 3 6 triangles(in a pyramid shape) Thanks for your help.
*September 23, 2010*

**Physics**

Thank you-I appreciate it
*September 6, 2010*

**Physics**

When James applied the brakes to his car, it slows unifromly from 15.0 m/s to 0.0 m/s in 2.50 s. How many meters before a stop sign must she apply her brakes in order to stop at the sign? Answers: 6.0m 37.5 m 18.8 m 48.0m Please help-I've just started Physics last week and...
*September 6, 2010*

**Physics**

Suppose that you are at the top of a (rigid) rocket which is half a light year tall. If the rocket is accelerating such that your proper acceleration is 1g, What is the proper acceleration at the bottom of the rocket? B = F c2 c2 F : This is one of the...
*September 5, 2010*

**Algebra**

I am having problems with polynomial functions. f(x)= (x-3)(x+2)(x+4)
*August 29, 2010*

**Algebra**

Two cyclists leave towns 240km apart at the same time and travel toward each other. One cyclist travels 10km/h slower than the other. If they meet in 5 hours, what is the rate of each cyclisst?
*August 15, 2010*

**Shakespeare**

I am trying to find an example of a paraphrase in Romeo and Juliet. I know that it is a restatement by another character but can not find where this occurs. Would someone please help me? Thank YOu.
*July 22, 2010*

**DrBob222**

Thank you-that's it-i really appreciate it
*April 26, 2010*

**Chemistry**

I have a diagram that I have to identify for homework. The structure shows an "R" connected with single bond to carbon(in the middle)-which in turn is connected to OH with single bond.-The carbon in the middle has a double bond with Oxygen on the top. The possible ...
*April 26, 2010*

**math**

why is it possible to draw a circle which passes through all vertices of a rectangle
*February 6, 2010*

**Physics**

lol. In web assagain, if you type ::corrrect, it shows you the answer.
*January 3, 2010*

**Physics**

In a hydraulic lift, if the radius of the smaller piston is 2 cm and the radius of the larger piston is 20 cm, what weight can the larger piston support when a force of 250 N is applied to the smaller piston? d = diameter of smaller piston D = diameter of larger piston I just ...
*December 14, 2009*

**Language**

What reference source I use for nearest music store
*December 10, 2009*

**math**

where there's smoke, there's
*December 2, 2009*

**math **

Jesus, you guys are bad. 210 - 30 (consultation fee) = 180 180 / $45 (hourly rate) = 4, 4 = number of hours worked.
*November 20, 2009*

**Math 156**

x1 + x2 = 77 x2 - x1 = 27 x2 = 27 + x1 x1 + (27 + x1) = 77 2 x1 = 50 x1 = 25 x2 = 52
*October 15, 2009*

**Calculus: limits**

Factor (25-t) into (5-sqrt(t)) and (5+sqrt(t)) Cancel top and bottom (5-sqrt(t) and left with lim t->25 of (5+sqrt(t)) which is 10.
*October 15, 2009*

**Algebra**

As you can see this is not factorable in your head or obvious so we have to use the Quadratic Formula: for Ax^2 + Bx + C = 0 x = ( -B / 2 A ) + or - ( sqrt (B ^ 2 - 4 x A x C) ) / 2 A So A = 1, B = 8, C = -2 -8/ 2 + or - sqrt( 64- (4 x 1 x -2)) / 2 -4 + or - Sqrt( 72 ) / 2 -4...
*October 15, 2009*

**Physics**

Question: Two masses 2.2 Kg and 3.2 Kg connected by a rope over a massless and frictionless pulley hang at 1.8 m above the ground on either side of the pulley. The pulley is 4.8 m above the ground. What is the maximum height that the 2.2 Kg weight will rise to after the system...
*October 15, 2009*

**albgrea **

jill is 6x, Amy is 1x 7x = $84 x= 12, Jill $72, Amy $12. ------------------ x = amount in Dues 14 x + 370 - 600 = -10 14 x = 220 x = $15.71 It doesn't work out exact due to rounding of the penny. The club would have overdrawn by 10.06 in the account.
*October 15, 2009*

**Biology**

Monomers form to combine polymers, in this case a nucleic acid. The monomer of a nucleic acid consists of a nitrogenous base, a phosphate group, and a sugar. The monomers are bound together by phosphodiester bonds. With that information, you should be able to find the answer.
*September 27, 2009*

**chemistry**

What spectra are you referring to? Mass spectroscopy, NMR, and IR are all referred to as spectra. In addition, you could be talking about fluorescence spectroscopy. How they do it varies, but they are mostly used for identification.
*September 27, 2009*

**Chemistry II**

Ok, given the volume and density, you can determine the grams of each compound present. That leaves you with needing to find the moles of acetone in the solution of 85mL, or 0.085L. Now, what quantity can you calculate that would relate grams and moles? Think periodic table. ...
*September 27, 2009*

**CHEMiSTRY PLEASE HELP**

I believe I answered this elsewhere are well, but... Weight and mass are two different things. Mass is a measure of the amount of matter contained in something, weight is a measure of force (F-ma). Doubling the gravity would certainly affect the weight, but do you think it ...
*September 27, 2009*

**chemistry**

Mass and weight are two different things. It is true that the object would weigh twice as much, but the mass would remain the same, as it is independent of gravity. Think of mass as a measure of the amount of matter in an object. Weight is a measure of force (F=ma). I agree on...
*September 27, 2009*

**science**

Say you have two gallons of water in one bucket and one gallon in another. They would weigh different, the volume is different (1 gallon vs 2), and the mass would differ. However, they are the same substance. However, if you boiled the water in these buckets, they would both ...
*September 27, 2009*

**science**

This question is testing your knowledge of the order of life: Atom Molecule Organelle Cell Tissue Organ Organ System Organism This order starts small and simple and grows to larger and more complex systems. With this in mind, which do you think a plant is?
*September 27, 2009*

**chemistry.**

A trick to solving this type of problem is to reduce all of the ratios to either their simplest form or a percentage. Ex. 3C/6H => 2C/4H => 1C/2H = 50% C 1/2 is the simplest form, and the molecule is 50% Carbon. With this in mind, you should look over your options once ...
*September 27, 2009*

**SCIENCE**

Think of the organisms that use diffusion for gas exchange. Most of them have a very high surface area to mass ratio. I'll give you a big hint, there's a relationship between speed of diffusion and the distance over which something is being diffused.
*September 24, 2009*

**College Physics**

A car starts from rest on a curve with a radius of 140 and accelerates at 1.20 . How many revolutions will the car have gone through when the magnitude of its total acceleration is 3.50 ? If someone could just get me started. Im new to this stuff. I dont understand how if ...
*September 15, 2009*

**math**

i am doing a SSAT/ISEE Prep... not a dignostc but just a prep. I need help desperately. Please help me within the next few minutes, somebody!
*April 9, 2009*

**english**

I think that will be just simple. Here is the reconstructed sentence: Devon had an eerie dream about grammar rules last nighPr
*April 9, 2009*

**Chemistry**

I am writing out ionic compounds. The compound given is Fe(subscript)2O(subscript)3. I noticed on the periodic table iron had a charge of 3+/2+. Which should I then write down in the cation column of my ionic compound chart? Thank you.
*March 5, 2009*

**Please help! algebra 2**

thanks
*February 24, 2009*

**Please help! algebra 2**

i think my main problem is that i dont understand the question but my friend tried explaining it and i didnt really get it ( i think its 2) What is the absolute value of the product of the solutions of the equation below? (x+2)^2=16
*February 24, 2009*

**algebra 2**

please?
*February 24, 2009*

**algebra 2**

Hey could you help me with this: What is the absolute value of the product of the solutions of the equation below? (x+2)^2=16
*February 24, 2009*

**algebra 1 page 167 did you hear about...**

Need help, did yoj hear about.... Cat one
*February 22, 2009*

**Writing/ Research**

In Katz ( Katz vs Olmstead), why did Douglas write a concurring opinion? what is the basis of his opinion? Do you agree or disagree with the opinion and why?
*February 15, 2009*

**Reading**

Uncertain is to unsure AS shy is to _____? Please help me... I am up late and need to finish my homework... Thank you!!!!!
*February 9, 2009*

**Reading**

Senseless is to silly AS sensible is to _____?
*February 9, 2009*

**Chemistry Lab**

properties of hydrogen
*January 20, 2009*

**Chemistry Lab**

action with acid
*January 20, 2009*

**Biochemistry**

Urea is heated in a test tube. A condensation reaction occurs. Which one? What is the formula for this reaction? Then cupper sulphate and sodium hydroxide is added to the tube. This is compared to a tube in which cupper sulphate, sodium hydroxide and a solution of egg white ...
*December 25, 2008*

**art**

What is a Three dimensional representation of shape
*November 19, 2008*

**English / Universal Health care**

I'm writing a paper in support of universal health care. So far, I have defining the problem, how the uninsured are treated, an anecdote, profiles of the canadians and british syetms, and how it could save us money. I'm only at a full 3 pages, and I need three more. ...
*November 19, 2008*

**History**

I need 2 write a paper on the Renaissance but i don't know what to put in my outline. can some1 give me an example,please? thank you.
*October 14, 2008*

**science**

Beaker, thermometer
*September 13, 2008*

**technology**

there are some websites that include ebooks
*September 12, 2008*

**words**

what subject is this??? And whats the lesson?
*September 11, 2008*

**11th grade**

False coplaner- is 2 or more points on the same plane collinear- is 2 or more points on the same line To remember look at the word coplaner: it includes the word plane in it. look atbthe word Collinear it includes the word line in it. Hope you understand.
*September 11, 2008*

**jku**

1,433+432=n
*September 9, 2008*

**7th grade history**

Start by listing what freedom means to you then on a diff. Paper start putting the points you wrote into sentences and you will get a speech. You should get a quote and use it as your opening statement.
*September 9, 2008*

**5th grade math**

n/80=30 first you want the n to be alone right? So you try to move the 80 so here you; n/80 * 80/1= 30* 80/1 remember whatever yoy do to the left you do to the right and whatever you do to the righy you do to the left. n=30*80/1 n=2400
*September 8, 2008*

**Algebra**

yep :D
*September 8, 2008*

**Chemistry**

Thank you! Now the whole lesson actually makes sense
*September 8, 2008*

**Chemistry**

what is the effect of atomic radius on the chemical reactivity of the halogens? Which is most the most active halogen? Which is the least active?
*September 8, 2008*