Tuesday

June 28, 2016
Total # Posts: 2,500

**Chemistry **

I'm having trouble turning mM to mOsmoles. The equation goes like this: red blood cell are placed into a beaker filled with .5L of a 150mM NACL solution. NACL is non-penetrating solute and will not cross the red blood cell membrane. I have 150mM/0.5L * 2mOsM/100mM But ...
*September 8, 2015*

**Math**

Hello every one its Anna:) I just wanted to say that Jesus loves you all no matter if you are big or small!
*August 19, 2015*

**Physics**

A constant force of friction of 50 N is acting on a body of mass 200kg moving initially with a speed of 15m/s. How long does the body take to stop? What distance will it cover before coming to rest?
*July 30, 2015*

**Geometry**

A square football field 3 mi. wide.
*July 29, 2015*

**Solving Geometry Formulas**

If the perimeter of a rectangle is 48 ft. and the width is 9 ft., what is the length of the rectangle?
*July 29, 2015*

**Solving Geometry Formulas**

The perimeter of a rectangle is 56 meters. If the width of the rectangle is 7 meters, find the length.
*July 28, 2015*

**Intro to Algebra- Geometry**

2 cans will be needed.
*July 28, 2015*

**Intro to Algebra- Geometry**

A sail on a sailboat has a base of 10 ft. and a height of 18 ft. and needs to be sealed with water repellent. One can of water repellent will cover 50 sq. ft., how many cans will be needed to cover the sail?
*July 28, 2015*

**Intro to Algebra**

Sally is making a tablecloth and wants to put lace around the edges. How much lace will she need to purchase if the radius is 1.5 ft.
*July 28, 2015*

**Probability and statistics**

The hydrocarbon emissions at idling speed in parts of million (ppm) for automobiles of 1980 and 1990 model years are given for 20 randomly selected cars. 1980 models: 141 359 247 940 882 494 306 210 105 880 200 223 188 940 241 190 300 435 241 380. 1990 models: 140 160 20 20 ...
*July 20, 2015*

**english teachers?**

are there any english teachers on here at this time?
*July 17, 2015*

**Biology**

I have any idea for these.
*July 15, 2015*

**Biology**

1) Microscopic hairs of the windpipe are always __________. 2) The cilia of the windpipe move harmful substances __________. 3) You build a heavy gust of air when you __________ or __________. 4) Coughing and sneezing help push harmful substances from the __________.
*July 15, 2015*

**Biology**

1 hair 2 mucus 3 mucus
*July 15, 2015*

**English**

I am writing a 300 word short story(or a "'personal' narrative essay") for the prompt: lessons we learn affect one's future. So far I have a general idea: I want the lesson to be loyalty and truth and I want the effect to be that the character would learn...
*June 21, 2015*

**Physics**

So we did this lab about how we are to measure the half life of the beta decay of indium 116 (the indium 116 is captured by indium 115 and undergoes beta decay to become tin 116. Since the Indium 116 I reused I understand that every time we use it, the indium 116 becomes a ...
*June 17, 2015*

**Physics**

The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. Imagine that a steel wire with this length and a cross-sectional area of 4.00 x 10-6 m^2 is laid on the bridge deck with its ends attached to the towers of the bridge, ...
*June 15, 2015*

**Physics **

What is the significance in the observation of discrete spectral lines in the emission spectrum of hydrogen??
*June 15, 2015*

**Physics**

A converging lens has a virtual object located a finite distance away. Which of the following must be true? (Select all that apply.) a) f > q b) The image is virtual. c) p < 0 d) The image is real. e) p > 0 Hi, can someone explain which is correct or incorrect? Thank ...
*June 10, 2015*

**English**

I am just about the processes of writing a short story and I am looking for a word/phrase that can properly describe a departure, without a destination(I am not going to specify anything to reflect the tone and theme of my story) that is just taken based on whim and for self ...
*June 9, 2015*

**Physics**

A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the figure below. (a) How ...
*June 8, 2015*

**Physics**

A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the figure below. (a) How ...
*June 8, 2015*

**Physics **

I did a lab about Standing waves on a string and it asked me the following qeuestions: Discuss any errors arising from the method used to establish the standing wave pattern. - I think air resistance, linear density of string is non uniform, tension of the string is not ...
*June 5, 2015*

**Physics **

Suppose you have a string that is being made to vibrate at a specific frequency, f. The speed of waves on the string is v. The length of the string that is vibrating, L, is adjustable. When the length of the string has been adjusted so that the fundamental standing wave ...
*June 4, 2015*

**Physics**

thank you!
*June 4, 2015*

**Physics**

A stretched string is attached to an oscillator. On which of the following quantities does the wavelength of the waves on the string depend? Select all that apply. The choices are: A) The frequency of the oscillator. B) The tension applied to the string. C) The amplitude of ...
*June 4, 2015*

**Math**

Wait! Nevermind, figured it out! Use linear equation right?
*June 3, 2015*

**Math**

Which of the following equations gives the relationship between S and T in the table below? S 1 2 3 4 5 6 T 1 4 7 10 13 16 How do you find equations again?
*June 3, 2015*

**Math**

1. Cate went on a trip of 120 miles at x miles per hour. Returned over same route at 5miles/hour faster than previous rate.If time for return trip was one-third of an hour less than time for the outgoing trip,how do you find x? (Set up the chart right, and used the time column...
*June 3, 2015*

**Math**

PLease explain how to do this Add or Subtract (m^2-m+3)+(m-1)
*June 2, 2015*

**Science**

not sure but I think it is C
*May 27, 2015*

**Math**

I brought a book and paid $1.80 in sales tax. If the tax was 8%, what was the cost of the book. How do I solve this problem?
*May 25, 2015*

**Language Arts**

Each day, Wyatt created both humorous and touching poetry in his attic room. his attic room both humorous and touching poetry Each day in his attic room
*May 23, 2015*

**ss**

That link didn't help at all. If you could, every once in awhile, JUST GIVE A BALLPARK FIGURE, and stop sending stupid links.
*May 13, 2015*

**LA the giver chapters 1-2**

just to make it easier, all of the answers are: 1. b, d 2. c 3. b 4. d
*May 13, 2015*

**english**

Please place all of the chairs in the middle of the room.
*May 11, 2015*

**math**

Me is 100% correct. Thanks a bunch.
*May 6, 2015*

**Spanish**

Thank you so much Sra. You are always so kind to help.
*May 2, 2015*

**Spanish**

Sra. does this essay look ok? It is comparing the Hispanic views on death and the US view. Cultura hispana celebra la muerte de muchas maneras, mientras que la cultura americana creo que es demasiado triste para la vida diaria. La vida para los hispanos es difícil. La ...
*May 2, 2015*

**math**

yEAH, Student stop being a HATER
*April 28, 2015*

**Computer Architecture!! **

How can we find the value in decimal stored in the AC register, after executing the MARIE program
*April 24, 2015*

**Math**

Amy is 100% correct for Connections Academy students. =)
*April 24, 2015*

**Chemistry**

for anyone else needing this info it is b
*April 20, 2015*

**Chemistry**

so is it a b or c
*April 20, 2015*

**Chemistry**

then you must times it by two so it would be .0144
*April 20, 2015*

**Chemistry**

but that is wrong when entered into assignment, what else could it be
*April 20, 2015*

**SS**

Just because someone needs help with a question doesn't mean that they're cheating. If you have nothing nice to say, dont say shizznit at all!
*April 20, 2015*

**college algebra**

a chemist needs to prepare 28 ounces of a 8% hydrochloric acid solution. find the amount of 14% solution and the amount of 7% solution he should mix to get this solution.
*April 20, 2015*

**math word problem**

You are in a car. The car begins your journey by traveling 3 miles south in a straight path. The car then travels 9 miles east in a straight path and then turns and travels another 9 miles south in a straight path to end the journey. What is the straight-line distance between ...
*April 16, 2015*

**SOUTH CAROLINA STATE HISTORY**

9. Which event did NOT change the culture of the United States during the early 1920s? (1 point) a. bank failures that closed factories and decreased job opportunities b. installment plans used to purchase expensive consumer goods c. boll weevil infestations which changed ...
*April 15, 2015*

**Economic**

Suppose that Betsy’s utility function is given by the equation U=Y0.3 where Y is measured in thousands of dollars. Betsy’s current job pays her $20,000 per year and she can earn this amount next year with certainty. Betsy is offered a different job but in this new ...
*April 15, 2015*

**Pre Algebra Probability**

adolf hitler and you know he is gay, how? plus, whats wrong with that? compare being gay with murdering tons of innocent Jews? dont try taking a straw out of someone elses eye when you have a rafter in your own
*April 13, 2015*

**Physics**

You have 250 g of water in an aluminium calorimeter with a mass of 125 g. How long will it take to increase the temperature of the water and calorimeter from 20C to 37C if the system is heated by a resistive heating element with 8 V across the resistor and 0.75 A flowing ...
*April 12, 2015*

**English**

What are each of these are like: 1. Control 2. Conformity 3. Equality 4. Individualism
*April 12, 2015*

**Trigonometry (identities) (last help needed)**

I apologize; it is simplifying. The homework is for my identities unit, though. And number 1 does not have a typo. Sorry!
*April 9, 2015*

**Trigonometry (identities) (last help needed)**

1. (2cosx-2secx)(3cosx^2+3secx^2+β) 2. (16tanxsecx-4secx)/(8tanxsecx+4secx) 3.sinxcosx^3+cosx^4 (hint: GCF) 4. (cosβ+sinβ)^2
*April 9, 2015*

**Trigonometry (identities)**

I tried these but for 4 I seemed to get a reasonable answer: cos^2(β)-cot^2(β) How does that look? Please correct me if I'm wrong - it felt too simple.
*April 9, 2015*

**Trigonometry (identities)**

1. (-8cosxsinx+4cos2x)^2 +(4cosx^2+8sinxcosx)^2 2. cos(α-β)cosβ-sin(α-β)sinβ 3. 1+(sinx-cosx)(sinx+cosx) 4. (cosβ-cotβ)(cosβ+cotβ)
*April 9, 2015*

**Geometry**

Pyramid?
*April 8, 2015*

**Physics**

A parachutist drops out of a plane at an altitude of 150m and accidentally drops his camera. If the parachute opens the instant he drops out of the plane and he descents at a constant speed of 6 m/s, how much time separates the arrival of the camera on the ground from the ...
*April 5, 2015*

**Trigonometry (identities)**

Simplify: 1. sin(α+β)+sin(α-β) 2. (-8cosxsinx+4cos2x)^2 + (4cos^2x+8sinxcosx)^2 3. sqrt(sin^4xcosx) * sqrt(cos^3x)
*March 31, 2015*

**chemistry**

Answer is 40.1L. After conversions, plug it all into V=nRT/P
*March 31, 2015*

**chemistry**

Try PV=nRT, where R=0.08206, P=pressure, V=volume, n=moles, and T=temperature. Convert temperature to Kelvin, Torr to atm (pressure), and g to moles (divide by molar mass).
*March 31, 2015*

**Chemistry**

This sounds right to me! Next step to find kJ per gram, would be to convert your J to kJ, and divide by the amount of grams given. This is odd, however, since normally these problems want kJ per mole, not gram. I hope this helps!
*March 31, 2015*

**art**

Thanks "Sid.V" I couldn't figure out number 2
*March 31, 2015*

**chemistry**

Keep in mind: n=moles, so divide your grams by molar mass to get moles. Then, as said above, plug everything in. V=nRT/P
*March 30, 2015*

**Chemistry**

Set up: convert units --> PV=nRT --> PV/RT=n --> moles to molecules. (0.993atm*2.00L)/(0.08206*296.15K)=0.08176 mol N2 0.08176 mol*(6.022x10^23 molecules/1 mol)=4.92x10^22 molecules N2 Let me know if this helps!
*March 30, 2015*

**English**

B. It's for sure.
*March 27, 2015*

**math**

The area of a circle is given by the formula A = ðr2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100ð square inches, what is the radius of the original circle?
*March 26, 2015*

**History**

ohhhhh its C xD
*March 24, 2015*

**History**

so A :)
*March 24, 2015*

**History**

South Carolina .
*March 24, 2015*

**History**

Why did the popularity of the Grange decline? a.)Its leaders were weak and ineffective. b.) It became corrupt and lost the farmers' trust.**** c.) It did not address the farmers economic needs. d.) it was not able to obtain political power in the state
*March 24, 2015*

**History**

thank you mrs.sue and reed :) if i have anymore questions do you mind helping ? if not its ok i understand :)
*March 24, 2015*

**History**

so for the last one would it be A ?
*March 24, 2015*

**History**

wait would number 2 be b ? i was confused on that one . and be for the last question also ?
*March 24, 2015*

**History**

im confused about that last one would it be a or b ? and yes for number 1 and im not sure for number 2 because thats the whole question
*March 24, 2015*

**History**

please help i have my answers just not sure if im correct :( what criticism did tillman direct at conservations? a.)they controlled the office of the govnr b.)they didnt think blacks should vote ****** c.)they believed in white supremacy d.)they didnt care about the common ...
*March 24, 2015*

**Spanish**

Hola Sra. Do these look ok? Part I Complete el párrafo por llenar los espacios en blanco con la forma correcta de los verbos entre paréntesis. ¡OJO ! No todos requieren el subjuntivo. Hoy martes estoy en el aeropuerto y tengo que pasar la aduana. El aduana ...
*March 20, 2015*

**Pre-Algebra**

Equation M: y = 3x + 4 Equation P: y = 3x + 7 Which of the following options is true about the solution to the given set of equations? No solution One solution Two solutions Ininite solutions I thought it was infinite solutions but i got the answer wrong.
*March 20, 2015*

**CHECK ANSWERS PLEASE!!!**

Thanks "Alexis" I got a 100% I had gotten them almost completely wrong smh.
*March 18, 2015*

**chemistry**

How much energy is needed to completely remove an electron from n = 2 in a hydrogen atom?
*March 18, 2015*

**Art**

Got 100% thanks
*March 16, 2015*

**Spanish**

Thank you so much for your tips. Hopefully these are better. 1. La fiesta se considera excesa pero todo el mundo participa. 2. Se abrazan, celebran y bromean acerca de la muerte. 3. Ella era una buena madre y estaba triste que su hijo era un ladrón. 4. Él pens&...
*March 12, 2015*

**Spanish**

Hola Sra.! Do these look ok? Escriba un párrafo (por lo menos 5 oraciones) para contestar cada una de las preguntas siguientes. 1. Identifique dos temas principales de “The Day of the Dead” por Octavio Paz. El ensayo es sobre la cultura de la fiesta y de la ...
*March 12, 2015*

**math**

Sinx/Cscx -1+sinx/Cscx +1= 2tan^2x
*March 8, 2015*

**L.A**

An analogy explains, clarifies, or illustrates something by drawing comparisons. Frost compares the woods to life. The two paths represent decisions made to take one road, and not the other road. Whitman uses analogy by saying that the Civil War was a sea voyage and Mr. ...
*March 6, 2015*

**social studies. NEED HELP ASAP**

It's restricting their appearance. Thy wear hijabs, and long silk clothing. This is the only one that makes sense. If you read your book, it tells you about women who have jobs. They even gave an example of a woman who is nurse. Also, what Ms. Sue said. They have the right...
*March 6, 2015*

**Chemistry**

i converted from pKa to Ka for all three values. i don't know where to go from there.
*March 5, 2015*

**Chemistry**

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.250 M phosphoric acid solution. [H3PO4] = ? [H2PO4^-] =? [HPO4^2-]=? [PO4^3-]=? [H^+]=? [OH^-]=? pH=?
*March 5, 2015*

**Math**

Three is not A. Three was C for me, and I got a one hundred. Thank you I_Was_Here.
*March 5, 2015*

**chemistry**

A container of gas at 24 psi is compressed to one eighth its original volume. What is the new pressure of the gas? Answer in units of psi.
*March 5, 2015*

**chemistry**

A chemist prepares a sample of hydrogen bromide and ﬁnds that it occupies 249 mL at 60◦C and 552 Torr. What volume would it occupy at 0◦C at the same pressure? Answer in units of mL
*March 5, 2015*

**Precalc+trig**

Solve tan(40/90) for the double angle cos(2theta). I know I use the x^2 + y^2 = r^2 formula and cos(2theta) = cos^2theta - sin^2theta. But I don't understand my answer
*March 4, 2015*

**MATH**

thank you for awnsering my question
*March 3, 2015*

**calculus**

Find Indefinite Integral of dx/(x(x^4+1)). I think that Im complicating it too much. I moved the dx out making it 1/(x(x^4+1))dx than 1/(x^5+x)dx. I think i have to use formula indef integral of dx/(x^2+a^2) = 1/a(tan^-1(x/a)) but im stuck i dont know what to do next. I would ...
*March 3, 2015*

**chemistry**

Given the following balanced chemical equation, if 15.4 g AgNO3 are reacted, how many moles of AgCl are produced? 2 AgNO3 + BaCl2 → 2 AgCl + Ba(NO3)2
*March 1, 2015*

**chemistry**

A sample of oxygen that occupies 2.5 × 10−6 mL at 508 mm Hg is subjected to a pressure of 1.2 atm. What will the ﬁnal volume of the sample be if the temperature is held constant? Answer in units of mL
*February 25, 2015*

**Social Studies**

Thank you for the map, Ms. Sue.
*February 25, 2015*

**physics**

Ohh I see the pulling force is 220.5 The frictional force is 66 For the normal force I actually got 367.85 I just don't understand how you solved for acceleration by saying 1/2-1/5*7.96
*February 22, 2015*