Sunday

September 25, 2016
Total # Posts: 573

**chemistry**

This is incorrect, It says "by mass" not "by moles". therefore you must find the number of moles and use the mole fraction

*October 13, 2008*

**math**

thanks u

*September 18, 2008*

**math plz......help.............................**

i need help

*September 18, 2008*

**math**

1> a bag contains 7 red 6 green and 7 white marbles, all identical but for color. what is the probability of selecting a red marble at random? 2> A weather predicts that there is a 45% chance of snow. what is the probability that it will not snow? 3> the probability ...

*September 18, 2008*

**Math**

thanks a lot

*September 18, 2008*

**Math**

1> A box contains five cutouts of the same triangle differing only on color. if one cutout is drawn at random, what is the probability of choosing a specific color?

*September 18, 2008*

**ICT YEAR 8**

what does sitemap mean???

*September 12, 2008*

**Grammar**

what is a nominative pronoun?

*September 2, 2008*

**urgent maths**

12

*August 21, 2008*

**6th Grade Math**

can you help me with my integers homework

*August 19, 2008*

**6th Grade Math**

can you help me with my integers homework

*August 19, 2008*

**Pre-Calculus/Calculus**

okay, thanks!

*July 1, 2008*

**Pre-Calculus/Calculus**

I am too embarassed to ask this Calculus (really pre-calculus) question in tutoring, because I know I should know. Is the inverse of f(x)=3x-1 actually f(x)=1/3x+1? How do I find it? What if it asks the same equation replaced with f to the -1 power (x)? I think I know how the ...

*July 1, 2008*

**English**

Very good.

*June 25, 2008*

**science**

how can we save water??? how do we recycle???

*June 7, 2008*

**english**

I am just completely stuck and on the verge of giving up. My last day of school is today and if I dont hand in this essay I will fail no matter what. The essay is on the type of essay, voice and tone in the chapter toolbox of Stephen King's book, On Writing: A memoir of ...

*May 5, 2008*

**Social Studies**

What were the impacts of China's Cultural Revolution?

*April 28, 2008*

**Economics**

Claculate REAL GDP GROSS DOMESTIC PRODUCT for each year (2005=100) Year p q p q 2005 $1 100 $2 50 2006 $2 150 $3 100

*April 16, 2008*

**economics**

The domestic economy's consumption possibilities curve can be greater than the domestic economy's production possibilities curve. Why is this true?

*April 11, 2008*

**Physics check**

An excited atom decays to its ground state and emits a green photon. If the atom decayed to an intermediate state instead, the photon emitted could be.... red or blue?

*April 11, 2008*

**Physics check**

The mass of an atomic nucleon (proton or neutron) is about ..... times larger than the mass of an electron. 33?

*April 11, 2008*

**Physics**

Supppose an atom has four distinct energy states. Assuming all transitions are possible, how many spectral lines can this atom produce? Answer with a number only.... ? have no idea

*April 11, 2008*

**Physics check**

Heavier atoms are not appreciably larger in size than light atoms because the nuclei of heavy atoms have more.... nuclear energy?

*April 11, 2008*

**Physics check**

The spectral lines for elements are sometimes called atomic..... spectra?

*April 11, 2008*

**Physics check**

ok,shat about several photons in a series of transitions to the ground state

*April 11, 2008*

**Physics check**

According to Bohr, an electron in an excited state could give off ..... a continuous cascade of photons for a high-level transition.

*April 11, 2008*

**Physics check**

In 1923, Robert Millikan won the Nobel Prize for discovering the mass of the .... electron?

*April 11, 2008*

**Physics check**

I checked out the website, thanks. These are multiple choice and the correct answer is not a choice. electron proton neutron nucleus

*April 11, 2008*

**Physics check**

In 1906, J. J. Thomson won the Nobel Prize for the discovery of the ..... electron?

*April 11, 2008*

**Physics check**

nucleus?

*April 11, 2008*

**Physics check**

In Rutherford's Gold Foil experiment, he bombarded gold with alpha particles and discovered the .... electron?

*April 11, 2008*

**Bio**

Might want to look them up one by one.

*April 10, 2008*

**Biology**

I believe they detected the proteins involved, they knew those long before they even knew what DNA exactly did or looked like.

*April 10, 2008*

**Math**

So this means that the original price had 20% or .2 of the original price added on. After that, the price was 54. So, 54=(.2x)+x because x is the original price plus the 20% of the original price. want to know something weird? x+.2x=1.2xwhen you add them, imagine a 1 in front ...

*April 9, 2008*

**Math**

It looks to be 0...

*April 9, 2008*

**Math**

do you have a calculator? divide 1 by 1/4 (or .25) and see...

*April 9, 2008*

**Math**

yes.

*April 9, 2008*

**Math**

b is the same as x, just a different letter. how do you think it would go if it said 12x<12

*April 9, 2008*

**Proofreading**

Okay, I skimmed through it and I get where you are going, but you see the part where it mentions credibility of the source? When you call the article casual, that can be misunderstood as average, inadequate, anybody's old paper. They just mean it doesn't have to be a ...

*April 9, 2008*

**Proofreading**

I love your beginning :). When you say "These reasons make it vital..." it sounds a bit awkward. Take that out and keep "It is vital for parents to help..." You could even begin it "For this reason..." You really were only giving one whole ...

*April 9, 2008*

**Math**

very good. See, you get it.

*April 9, 2008*

**Math**

yes!

*April 9, 2008*

**Chemistry**

Does a catalyst affect a reversible equation like the kind in my earlier post?

*April 9, 2008*

**in text citation**

It depends, but If you are quoting or paraphrasing, I believe you can say "blahblahblah(Frankenstein)." remember to put the period after the citation, no matter how you do it, with a title or name.

*April 9, 2008*

**Math**

Yes! You got it! If you check back with my line explanation, since it is underlined, you darken in the circle and draw in a line for every number less than 3

*April 9, 2008*

**mATH**

I got 4 when I divided 1 by .25 (.25 also means 1/4)

*April 9, 2008*

**mATH**

If this is underlined < that means it is less than and equal to. No line just means less than. I explained this problem earlier, it looks harder, but it's the same. Get rid of the number beside the x by division.

*April 9, 2008*

**Math**

Yes. Draw a line from -5 to 5 and fill it out from there.

*April 9, 2008*

**Math**

Not that I can think of...I think I remember using a line graph where you circle the number (2 in the last case) and since it is not equal to x, you don't darken it in, then draw a line that extends to all numbers less than 2. x is somewhere in there.

*April 9, 2008*

**Math**

yes! and dividing by 6 would make sense because it would read x<2 or x is less than 2.

*April 9, 2008*

**Chemistry**

You know, that is entirely obvious, I think I'm just making things too difficult by overthinking them. Thanks much for shaking me out of that stupor.

*April 9, 2008*

**Chemistry**

I am in an AP high school course and the teacher pulled a fast one on us by asking us what happens to K in an reversible equilibrium equation if the equation is flipped. K equations I am talking about go K=(Products)/(Reactants). The options were they take the square root of K...

*April 9, 2008*

**Proofreading**

You have excellent grammar and reasoning, but the first thing they taught me in high school is never begin a paper with "I'm going to write about..." or "This paper is going to be on..." Maybe that is the way they told you to write this paper, and if so...

*April 9, 2008*

**Science/Lab**

I was able to see that the cold water took longer for the diffusion and the hot water was really fast. almost half the time. I am assuming that it is because the molecules move much more quickly in the hotter water. Am I correct?

*April 2, 2008*

**Science/Lab**

Can anyone tell me what happens when you do the diffusion lab? It is the one where you take food coloring and drop it into hot, cold and room temperature water and tell the differences.I need all the info.... please help.

*April 2, 2008*

**biology**

I need to determine if the following statements are a prediction (P), a hypothesis (H) or an observation (O). Then, I need to determine if they are of inductive or deductive reasoning. Male Red-winged Blackbirds display red wing patches to signal superiority to other males. - ...

*March 16, 2008*

**science**

imagine you are flyingfrom seattle to san francisco,which is almost exactly due south of seattle.shoud the pilot set a course due south? explain your answer.

*March 12, 2008*

**science**

imagine you are flyingfrom seattle to san francisco,which is almost exactly due south of seattle.shoud the pilot set a course due south? explain your answer.

*March 12, 2008*

**Calculus**

Find the integral, using the method of substitution where necessary. 63. integrate x^2*Sqrt[x+1] dx What I have done: I have set the (x+1) = u but I feel this is the wrong way to do this problem.

*December 9, 2007*

**Social Studies**

Things we find in nature are ___________ features. (Ex. landforms, bodies of water, weather, plants, animals)

*December 3, 2007*

**Physics Problem**

While running, a 70.0 kg student generates thermal energy at a rate of 1200 W. To maintain a constant body temperature of 37.0 C, this energy must be removed by perspiration or other mechanisms. If these mechanisms failed and the heat could not flow out of the student's ...

*December 3, 2007*

**Calculus**

Thank you.

*December 2, 2007*

**Calculus**

Problem 12. Find the derivative of the function. f(x)=e^(x)^1/2 My answer is: [e^(x)^1/2]/2x^(1/2) Is this correct?

*December 2, 2007*

**Physics. Please!!**

If the force on the tympanic membrane (eardrum) increases by about 1.50 N above the force from atmospheric pressure, the membrane can be damaged. When you go scuba diving in the ocean, below what depth could damage to your eardrum start to occur? The eardrum is typically 8.20 ...

*November 30, 2007*

**PHysics**

A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that it is 1.20×104 Pa, while in the region of blockage it is 1.15×...

*November 29, 2007*

**Calculus**

24. A pharmaceutical company has determined that a realistic model for the relationship between blood pressure (systolic) and the amount of a nerve drug designed to reduce the systolic pressure is given by the equation P=Pi + 2x - x^2. P is measured in millimeters of mercury ...

*November 11, 2007*

**Health**

When people with diabetes get injured(break a bone, get scraped,etc.) why does it take longer for their wounds to heal compared to someone without diabetes?

*October 29, 2007*

**Maths**

ya u do this by eating some moths, there ya go

*August 2, 2007*

**FRENCH**

Can someone jsut chek my grammer Florentine est une femme indépendante qui s’inquiète pour sa famille et pour leurs besoins. Elle vit une vie faible et ne veut jamais faire les mêmes erreurs que sa mère fasse, c’est-à-dire d’&...

*May 16, 2007*

**science**

what like charges do? like electrical charges repel each other. it doesnt fit in my crossword? An Example of an electric discharge? lightning repel

*April 24, 2007*

**Finance**

935.82

*December 11, 2006*

**writing**

I need sentences with the following words: stigmatize laudatory The Aga Khan was delivering a laudatory address as he presented the Die Quadriga They wanted to stigmatize the adulteress

*December 3, 2006*

**One more A.P Chemistry**

I have this exact question. It sucks. This is the worst class I've ever taken in my life. No joke. There's too much information to learn in one year and the review book even tells me that. It has ruined my entire junior year.

*October 24, 2006*