Monday

March 2, 2015

March 2, 2015

Total # Posts: 3,299

**Chemistry **

Phosphorous acid, H3PO3, is actually a diprotic acid for which Ka1 = 5.0 × 10-2 and Ka2 = 2.0 × 10-7. What are the values of [H+] and [H2PO3-] in a 2.0 M solution of H3PO3?
*February 27, 2015*

**chem**

A solution is prepared by dissolving 15.0 g of pure HC2H3O2 and 15.0 g of NaC2H3O2 in 600 mL of solution (the final volume). What is the pH of the solution?
*February 22, 2015*

**physics**

A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 0.0070m/s2 less than that at sea level (gsealevel = 9.83 m/s2). What is the observatory's altitude? Assume Rearth = 6.37 × 106 m.
*February 11, 2015*

**Latin I**

Primo (at first), natura ab viris adorabatur. Antequam (afterwards), viri et feminae deos et deas laudabant. Tum (Then) animas naturae laudabant. Animae naturae timebantur. Viri rogabant: De quo luna (moon) venit (comes)? De quo sol (sun) venit (comes)? Quid est causa fulminis...
*February 10, 2015*

**Latin I**

1. Estne in Campania? a. where is Campania? b. he is in Campania, isn't he? c. he is not in Campania, is he? d. Is he in Campania? 2. Vesuviusne populum terruit? a. did vesuvius frighten the people? b. Vesuvius did not frighten the people, did it? c. Vesuvius did frighten ...
*February 9, 2015*

**Physical Science**

no but these are my choices A. Bi-212 B. Bi-211 C. Bi-213 D. Bi-214
*February 7, 2015*

**Physical Science**

Here are some half-lives for different isotopes of bismuth (Bi): Bi-211 — 2.1 minutes Bi-212 — 60.6 minutes Bi-213 — 45.7 minutes Bi-214 — 19.9 minutes If there are 200 grams of one isotope of bismuth, and after 60.6 minutes there are 100 grams of bismuth, ...
*February 7, 2015*

**Physics**

A football punter accelerates a 0.59 kg football from rest to a speed of 8.4 m/s in 0.17s. What constant force does the punter exert on the ball? Answer in units of N
*February 6, 2015*

**Physics**

From the window of a building, a ball is tossed from a height y0 above the ground with an initial velocity of 8.50 m/s and angle of 23.0° below the horizontal. It strikes the ground 6.00 s later. If the base of the building is taken to be the origin of the coordinates, ...
*February 2, 2015*

**english**

how does imagery help build the theme ,words can be powerful, in "A Barred Owl"?
*February 1, 2015*

**math**

Four students, Rick, Robin, Ryu, and Roy are registered for the same class and attend inde pendently of one another, Rick 96.5% of the time, Robin 93.3% of the time, Ryu 8 8.2 % of the time, and Roy 77.9 % of the time. What is the probability that on any given day a) at least...
*January 30, 2015*

**Poetry**

thanks!
*January 29, 2015*

**Poetry**

Can anyone tell me what kind of poem is "A Barred Owl"? Ex. is it a villanelle or a sonnet...? Thank you!!
*January 29, 2015*

**Physical Science**

Which of the following statements are true about chemical reactions? Check all that apply. A. Reactants are on the right when writing a chemical reaction. B. Products are produced in a reaction. C. Reactants are present at the end of a reaction. D. Products are on the right ...
*January 27, 2015*

**science**

Shoe companies imbed unique designs on bottom of the sneakers they manufacture.what is the made n purpose? A to increase potential energy B to decrease friction C increase friction D to decrease potential energy. I think its C am I correct?
*January 26, 2015*

**math**

roetopodsaoenrfir need to unscramble for a math paper
*January 4, 2015*

**History**

Hi I'm honestly stuck on these 3 questions, I looekd on wiki and everything. Please Please help me out.. What action did President Polk take that resulted in the war between the United States and Mexico? He ordered troops to invade Mexico and capture Vera Cruz and Mexico ...
*December 21, 2014*

**algebra**

w(3w-1)=200 solve for w
*November 16, 2014*

**math**

which lap has the slowest time out of these- 1.59, 1.85, or 1.64
*November 16, 2014*

**Math**

write three fractions that can be written as percents between 50% and 75%. Justify your solution.
*November 13, 2014*

**math**

what is the least common multiple of 6 and 23? I got 138 am I correct
*November 11, 2014*

**Orgo Lab**

1, 4, 7 is my answer but wrong
*October 19, 2014*

**accounting**

Accrued salaries 1 Bill’s Company Partial Worksheet For the Year Ended December 31st, 2012 Account Titles Trial Balance Adjustments Adjusted Trial Balance Debit Credit Debit Credit Debit Credit Merchandise Inv. 16 Store Supplies 10 Store Equipment 20 Accum. Depr. Store ...
*October 6, 2014*

**Math Pre-Calc/Trig**

If 11 square meters of tile are available to make a rectangle whose width must be 6 meters less than its length, what would be the dimensions of the rectangle?
*September 30, 2014*

**math- pre calc/trig**

Thank you
*September 30, 2014*

**math- pre calc/trig**

Can you please explain that a little better, I am having a hard time understanding what you are saying
*September 30, 2014*

**math- pre calc/trig**

Find the length of each side of a square if the diagonal is 7(square root 2)? How do I solve or set up this problem?
*September 30, 2014*

**Physics**

What is the coefficient of friction between a sled and a plane inclined 30 degrees from the horizontal if the sled just slides without accelerating when given an initial push?
*September 21, 2014*

**Math**

A truck with 36-in.-diameter wheels is traveling at 55 mi/h. Find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes How many revolutions per minute do the wheels make? • This question is 2 parts. I can't remember the formula ...
*September 2, 2014*

**physics**

1. what is the specific heat of an object if the heat needed to change its temperature from 40degree celsius to 75degree celsius for 75 kg of it is 536 kcal? Please show me how to oompute it.
*August 13, 2014*

**physics**

1. How many clories will be needed to change the temperature of 3kg of water from 30degree celsius to 100degree celsius? please show me how to compute this,
*August 13, 2014*

**business law**

Can a contractor who doesn’t finish a home remodeling job get paid, even though they didn’t complete the job? BASE YOUR ANSWER ON THE CONCEPTS OF PARTIAL PERFORMANCE VS FULL PERFORMANCE, AND OFFSETTING OF AMOUNT DUE.
*July 18, 2014*

**Statistics (Check Work)**

I am so sorry! My apologizes for assuming you were a male! You have really been a great help on the few questions I have posted on here. I appreciate it so much! I did figure it out. I was going by the notes from my textbook, and they kept multiplying the p-value by 2 on every...
*June 26, 2014*

**Statistics (Check Work)**

I played around with some of the answers, and I realized my mistake. Turns out the computer just wanted me to compute the right tailed P-value. First Question: 1-0.8980=0.1020 Second Question: 1-9987=0.0013
*June 26, 2014*

** MathGuru?**

Is it possible for " MathGuru " to help with this question? Last time he provided a very detailed explanation. It really helped me understand the concepts.
*June 26, 2014*

**Statistics (Check Work)**

Can Someone help me with these 2 problems? I am certain I am solving them correctly, but for some reason the computer keeps marking my answers as incorrect. Question 1: Minnesota had the highest turnout rate of any state for the 2012 Presidential election. Political analysts ...
*June 26, 2014*

**Statistics**

One of the questions in the Pew Internet & American Life Project asked adults if they used the Internet, at least occasionally. The results showed that 454 out of 478 adults aged 18 - 29 answered yes; 741 out of 833 adults aged 30 – 49 answered yes; 1058 out of 1644 ...
*June 16, 2014*

**Statistics (Check Answer)**

Thank you so much for the help! I completely overlooked using the population correction factor.
*June 16, 2014*

**Statistics (Check Answer)**

Hi can someone check my answer. I'm not sure why the computer keeps marking it wrong. **Suppose a random sample of size 50 is selected from a population with σ = 10. Find the value of the standard error of the mean in each of the following cases (use the finite ...
*June 16, 2014*

**Statistics**

Can someone please help me answer these questions? I have tried every method I know and the computer still keeps marking the answers as incorrect. Thanks for the help! 1) If the number of 18-34 year olds sampled is equal to the value identified in part "a"(value=157...
*June 10, 2014*

**math**

rachel drove 260 miles using 12 gallons of gas. at this rate, how many gallons of gas would she need to drive 286 miles?
*May 26, 2014*

**Calc**

An Olympic-sized swimming pool is a rectangular prism that is 50m long, 25m wide, lled with water to a depth of 1.5m. We are going to pump the water out of the pool with a pump that is 0.5 meters above the surface of the water. Compare the costs of draining the pool from the ...
*May 18, 2014*

**math**

Ex (10-5)×24÷(3-2)
*May 6, 2014*

**math**

Cannot repeat, any mathematical operation
*May 6, 2014*

**math**

Using the numbers 2,3,5,10,24 write two seperate equations that equal 120
*May 6, 2014*

**Chem**

thank you!
*April 25, 2014*

**Chem**

where's it at? i couldnt find it
*April 25, 2014*

**Chem**

where's it at?
*April 25, 2014*

**Chem**

Using the standardized NaOH solution, the student weighs out 0.2550g of a solid unknown acid and finds that 28.50mL of the NaOH solution is required to reach an end point with the acid. Calculate the molar mass of the unknown acid, assuming the acid is diprotic.
*April 25, 2014*

**Chem**

Using the standardized NaOH solution, the student weighs out 0.2550g of a solid unknown acid and finds that 28.50mL of the NaOH solution is required to reach an end point with the acid. Calculate the molar mass of the unknown acid, assuming the acid is diprotic.
*April 25, 2014*

**chem**

the balance equation for the reaction of aqueous sulfuric acid with aqueous ammonia is 2NH3(aq)+ H2SO4(aq) -> (NH4)2SO4(aq) 1. what volume of 0.250M sulfuric acid solution would be needed to react completely with 18.00mL of 0.350M ammonia solution? 2. what mass of ammonium ...
*April 15, 2014*

**Logarithmic Algebra**

let log2=a, log3=b, and log5=c. express the indicated logarithm in terms of a, b, and c. log6/25 log 100
*April 9, 2014*

**physics**

Assume all angles to be exact. The critical angle between two materials is 45∘. If the angle of incidence is 35∘, what is the angle of refraction? (Consider that light can travel to the interface from either material.)
*April 1, 2014*

**physics**

An outdoor circular fish pond has a diameter of 4.00 m and a uniform full depth of 1.60 m . A fish halfway down in the pond and 0.70 m from the near side can just see the full height of a 1.80 m tall person. How far away from the edge of the pond is the person?
*April 1, 2014*

**Physics**

In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example, the note at 110 Hz has two strings at this frequency. If one string slips from its normal tension of 610 N to 542.00 N, what beat frequency is heard ...
*March 29, 2014*

**Physics**

The ship in the figure below travels along a straight line parallel to the shore and a distance d = 580 m from it. The ship's radio receives simultaneous signals of the same frequency from antennas A and B, separated by a distance L = 700 m apart. The signals interfere ...
*March 29, 2014*

**pharmacy tech**

. To find out if a drug causes nausea, you would look in this section of the drug monograph
*March 19, 2014*

**Writing Skills Writing Assignment **

I am trying to complete a 750 to 1000 word essay but I completely have no clue what to write about and my writing skills is a bit lacking. It needs to be about a personal experience. I have more info if needed.This is the final paper result. Your final paper should be at least...
*March 14, 2014*

**Chemistry 32**

HCI (aq) is a strong acid. suppose you dissolved 0.0365 grams of HCI in water to give a final volume of 10.0 mL. what is the pH of this final solution. The molar mass of HCU is 36.5g /mole and the molar mass of water is 18.0g/mole
*March 12, 2014*

**chemistry**

how many grams is that?
*March 3, 2014*

**chemistry**

A student determines the cobalt(II) content of a solution by first precipitating it as cobalt(II) hydroxide, and then decomposing the hydroxide to cobalt(II) oxide by heating. How many grams of cobalt(II) oxide should the student obtain if her solution contains 46.0 mL of 0....
*March 3, 2014*

**chemistry**

i really don't have a clue
*March 3, 2014*

**physics**

Two identical small insulating balls are suspended by separate 0.17 m threads that are attached to a common point on the ceiling. Each ball has a mass of 7.40 10-4 kg. Initially the balls are uncharged and hang straight down. They are then given identical positive charges and...
*February 27, 2014*

**physics**

Two identical small insulating balls are suspended by separate 0.17 m threads that are attached to a common point on the ceiling. Each ball has a mass of 7.40 10-4 kg. Initially the balls are uncharged and hang straight down. They are then given identical positive charges and...
*February 27, 2014*

**Physics**

I only need help with part B. A 250W computer power supply is on 10 h per day. Part A If the cost of electricity is $0.15/kWh, what is the energy cost (to the nearest dollar) if this computer is used like this for a year (365 days)? 140 dollars Part B If this power supply is ...
*February 19, 2014*

**Behavioral Statistics**

I need someone to explain HOW to do this..I don't want just the answer I have got to figure out how to do this before my mid-term, and I'm completely clueless! 3. One of the major U.S. tire makers wishes to review its warranty for their rainmaker tire. The warranty is ...
*February 10, 2014*

**math**

differnce btween eight times a number twice the number is 18
*February 9, 2014*

**social studies (HELP !!!!!!)**

@Princess Anna, @Writeacher, @Miss. Sue Please Help Me Please Help! I really don't Get It Please! ? ? ? ? It's due today! HELP! ANYONE !..... What were the positions of the Federalists and Anti- Federalists on the new Constitution? Provide at least two details ...
*January 13, 2014*

**MATH**

Find the interest earned by an account with $1,200 of simple interest of 4% for 3 years. Find the percent markup. Round to the nearest whole percent. store's cost: $100 selling price: $160 Find the percent of increase. 50 to 70 Find the percent of decrease. Round your ...
*January 10, 2014*

**math **

if f(x) = sqrt x^2-1 and g(x)-sqrt x-1, which expression represents f(x)/g(x) for x>1.
*January 7, 2014*

**science**

A window glass is 0.9 m wide, 1.5 m high and 4 mm thick. During winter, the temperature of the inside face of the window is 10°C, and the outside face is at -9 °C. How much thermal power is being transported through the window? (Kr = 0.84 W/m.K)
*January 7, 2014*

**physics**

A spring-like trampoline dips down 0.08 m when a particular person stands on it. If this person jumps up to a height of 0.26 m above the top of the trampoline, how far with the trampoline compress when the person lands?
*December 4, 2013*

**American Government**

its c
*December 4, 2013*

**physics**

A 2.1 kg pendulum bob hangs from a 2 meter string. It is pulled to the side, position A, so that the bob is 125 cm (h on the sketch) above the lowest position, position C. The bob is released and begins to swing. How fast is it moving at that point?
*December 4, 2013*

**MATH**

F.Y.I ~ The height is 26" The width is 26" (so the graph has a lot of square !!! ) Use your graph to predict the total number of blocks in a square with 64 SHADED blocks. Please EXPLAIN your reasoning.
*December 3, 2013*

**History**

In Jefferson’s view, George Washington’s action in addressing the Whiskey Rebellion A. was appropriate but not sufficiently bold. B. amounted to an inappropriate overreaction. C. Wouldn’t have been necessary save for the influence of Republican Clubs D. was a ...
*November 29, 2013*

**History**

In Jefferson’s view, George Washington’s action in addressing the Whiskey Rebellion A. was appropriate but not sufficiently bold. B. amounted to an inappropriate overreaction. C. Wouldn’t have been necessary save for the influence of Republican Clubs D. was a ...
*November 28, 2013*

**MATH**

PLEASE HELP ME PLEASE I REALLY NEED HELP!!!!!!!! :-( Complete the table below.Draw the next few squares as needed.Write all ratios in simplest form. Shaded Blocks: 1 | 4 | 9 | 16 | 25 | | ----------------------------------------------------- Total Blocks: 4 | 16 | 36 | | | 144...
*November 28, 2013*

**algebra**

Thank u coleene
*November 24, 2013*

**algebra**

Wat is 3a-b When a is 15 and b is ~1.5
*November 24, 2013*

**algebra**

Thank u Ms.Sue!
*November 23, 2013*

**algebra**

How do i write the qoutient of twenty four and the number p as a variable expression using p as the variable
*November 23, 2013*

**history**

Why did the English establish colonies in the Americas?
*November 15, 2013*

**Algebra**

Remove the parentheses from the following expression, and combine like terms: (a + b – c) + 3a – 2c A. 2a – b + c B. 4a + b + 3c C. 4a + b – 3c D. 2a – b – c
*November 15, 2013*

**math**

okay thank you!
*November 12, 2013*

**math**

How do I find the derivative of ⌠lnx ⌡π cos(e^(t))dt The question above is asking for the derivative of the integral cos(e^(t)) from pi to lnx
*November 12, 2013*

**math**

okay thank you!
*November 6, 2013*

**math**

So I need to solve this differential equation dy/dx = 1/(x+2) so i solved it like this dy = 1/(x+2)dx then i took the integral of both sides y= ⌠1/(x+2)dx ⌡ then performed a u sub u = x+2 du = 1dx y = ⌠du/u ⌡ y = ln abs(u)+c y = ln abs(x+2)+c but the ...
*November 6, 2013*

**Algebra 2**

the answer is 30
*November 5, 2013*

**reading/language arts**

where are the native americans ancestors from? please help i dont know the answer
*November 5, 2013*

**english**

Well people like the style. i'm a kpop fan. (especially girls generation and exo!)
*October 30, 2013*

**physics**

A 0.40kg piece of putty is dropped from a height of 2.9m above a flat surface. When it hits the surface, the putty comes to rest in 0.32s . What is the magnitude of the average force exerted on the putty by the surface? I keep getting 9.4 as the answer, but it says it's ...
*October 29, 2013*

**Solar Energy Please Help**

where is the rest of the answers?
*October 26, 2013*

**Solar Energy Please Help**

hi anyone have the answers to this Q
*October 26, 2013*

**chemistry**

4.86 mole Mg:0.112 mole O: smaller value
*October 26, 2013*

**college macroeconomics**

Suppose there is a temporary but significant increase in oil prices in an economy with an upward-sloping Short-Run Aggregate Supply (SRAS) curve. If policymakers wish to prevent the equilibrium price level from changing in response to the oil price increase, should they ...
*October 24, 2013*

**macoreconomics**

Suppose there is a temporary but significant increase in oil prices in an economy with an upward-sloping Short-Run Aggregate Supply (SRAS) curve. If policymakers wish to prevent the equilibrium price level from changing in response to the oil price increase, should they ...
*October 24, 2013*

**physics**

Nevermind, I realized my mistake. I forgot to add the length of the SUV (4.00 m) to 10.0 m.
*October 11, 2013*

**physics**

For a scene in a movie, a stunt driver drives a 1.50×10^3kg SUV with a length of 4.00m around a circular curve with a radius of curvature of 0.333 km. The vehicle is to be driven off the edge of a gully 10.0 m wide, and land on the other side 2.96 m below the initial ...
*October 11, 2013*

**math**

Because he couldnt find a date
*October 6, 2013*

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