Sunday

February 7, 2016
Total # Posts: 1,827

**Chemistry**

What is delta H for NaOH(s)+1/4O2(g) yielding 1/2Na2O2(s)+1/2H2O(l) ?
*November 8, 2010*

**physics**

In 2.0 minutes, a ski lift raises 4 skiers at constant speed to a height of 170 m. The average mass of each skier is 65 kg. What is the average power provided by the tension in the cable pulling the lift?
*November 8, 2010*

**Religions of the world**

What events and figures have shaped the development of Islam in the United States?
*November 7, 2010*

**us history**

So far, the only thing I can come up with was that he did it for the good of the country, to keep states united.
*November 6, 2010*

**us history**

I'm doing a mock trial defending Andrew Jackson being impeached. He is being indicted for violating states' rights in his dealings with South Carolina in the nullification crisis. I'm finding it extremely hard to find any info to form reasons to defend him.
*November 6, 2010*

**chemistry**

A 50.00ml sample of 0.200M hydroflouric acid (HF) is titrated with 0.200M NaOH. The Pka of HF is 3.452. a) calculate the pH of the HF solution before titration b) calculate the pH after the addition of 20.00ml of NaOH
*November 6, 2010*

**chemistry**

1) the value of Kb after the decomposition of sulfur trioxide (S03). 2SO3 (g)--2SO2 (g) +O2 (g) is 1.79 x10^-5 at 350 degree celcius. if SO3 initially at 0.200 atm pressure comes to equilibrium in an otherwise empty tank at 350 degree celcius, determine the partial pressure of...
*November 6, 2010*

**com/170**

between four types of of writing summary, analysis, synthesis,and evalution
*November 5, 2010*

**Physical Science**

49 y pr 49.2
*October 29, 2010*

**how come no one is helping on physics questions!!!**

Same here.
*October 28, 2010*

**Religions of the world**

What is the nature of God in Confucianism?
*October 28, 2010*

**Physics**

A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field. What is the ratio of the radii of their circular path?
*October 27, 2010*

**physics question**

A 278-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.870, and the log has an acceleration of 0....
*October 27, 2010*

**science**

state the chemical reagent that is used to demonstrate that expired air contains carbon dioxide
*October 24, 2010*

**9th **

The electricity costs of a business increased from $18,000 one year to $19,000 the next. To the nearest whole percent, what was the rate of increase?
*October 23, 2010*

**6th grade literature**

i help on page 31 god
*October 22, 2010*

**6th grade literature**

i help on page 31
*October 22, 2010*

**Phychology**

expectation plays an importand role in?
*October 22, 2010*

**physics**

16. How much work is done on a bookshelf being pulled 4.00 m at an angle of 35.0„a from the horizontal? The magnitude of the component of the force that does the work is 87.0 N
*October 22, 2010*

**physics**

a satelitee breaks in half while in circular orbit about the earth
*October 21, 2010*

**algebra**

also I don't know how to figure this out either, 5|x+7|+14=8
*October 21, 2010*

**algebra**

I'm working with absolute values, and for some reason I'm just really stumped by this problem. 7=|3x+9|+7 I don't see how I can get any number that will make the equation equal 7?
*October 21, 2010*

**College Organic Chemistry**

Why are fractionating towers in a refinery always tall?
*October 21, 2010*

**College Organic Chemistry**

Suggest what would be the result if we heated a mixture of dichloromethane and naphthalene to 60 degrees Celcius, collected distillate until no further material distilled, and then cooled the flask back to room temperature.
*October 21, 2010*

**College Physics**

A coil has a horizontal axis. Its current goes North on top. What is the direction of the magnetic field inside this coil?
*October 20, 2010*

**Thermochemistry**

When 1 mol of a gas burns at constant pressure, it produces 2426 J of heat and does 6 kJ of work. What is Delta H, q, and w?
*October 18, 2010*

**chemistry**

Based on the mass of O2 produced can you calculate the gram molecular weight? Chem lab on oxygen production 10g KClO3 reacts with heat to produce 2KCl(s)+3O2.What is the mass produced? 10g/122.6=0.0816 mole of KClO3 0.00816x3moleO2/2moleKClO3=0.1224 moleO2 0.1224 molex32g O2/...
*October 18, 2010*

**writing**

I need to write several sentences describing a interaction with a friend or family member about personal finance or credit cards, using five different pronouns in the sentences. Can you please give me some understanding or examples?
*October 17, 2010*

**Thermochemistry**

A total of 2.00 mol of a compound is allowed to react in a foam coffee cup that contains 167 g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 degrees C. What is the enthalpy?
*October 17, 2010*

**Thermochemistry**

It takes 45.0 J to raise the temperature of an 9.70 g piece of unknown metal from 13.0 degrees C to 24.5 degreesC. What is the specific heat for the metal?
*October 17, 2010*

**Math**

1. Look at the two monomials below. 9u3v2w4 15u4v4w3 What is the least common multiple (LCM) of the monomials shown above? 3u3v2w3 45u4v4w4 45u3v2w3 3u4v4w4
*October 15, 2010*

** DERIVATIVE!!!**

9(x-5)^2/3
*October 14, 2010*

**Math-Calc AB**

e^(-x/2) + xe^(-x/2) = 0 solve for x
*October 14, 2010*

**math**

Distribute: 2b-6+5=3b-3 Isolate b: -b=-2 b=2
*October 14, 2010*

**Thank you Reiny**

Thanks I think I somewhat get it-Thanks again for the explanations
*October 12, 2010*

**Please check-Reiny**

Could you check these two problems? 3sqrt (y+2) = 3 is y = 25 Answers were: true or false I said true because I did it like this Square both sides=y + 2 = 3^3 y+2 = 27 y = 25 and sqrt (2y-6) = 3-y for y answes are: no solution 5 3,5 3 I said 3 because I did it like this: 8y -...
*October 12, 2010*

**Algebra-Please help me!**

Thank you
*October 12, 2010*

**Algebra-Please help me!**

Hi, I'm totally stuck! Problem: sqrt(x-3) = sqrt (2) -sqrt(x) I know I square them to get them out of square roots but after that I'm stuck- answers: -25/8 25/8 no solution 1/8 Please show me how its done Thank you
*October 12, 2010*

**Chemistry**

A gas mixture contains 1.16 g N2 and 0.89 g O2 in a 1.49 L container at 16 degrees C. What is partial pressure of N2 & O2? *I already know the mole fraction for N2 is 0.60, and 0.40 for O2. I just don't know where to go from here.
*October 11, 2010*

**Chemistry**

Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 atm, to what pressure should you fill ...
*October 11, 2010*

**Critical Reading**

thanks very much
*October 10, 2010*

**Critical Reading**

It is true that every author has some bias? I would say true, but then I am not sure if this means in general or if you are able to tell in there writing true or false
*October 10, 2010*

**Critical Reading**

false?
*October 10, 2010*

**Critical Reading**

Inductive arguments leave no room for doubt as to the truth of their conclusions. true or false
*October 10, 2010*

**Critical Reading**

Thank you so much for your help, I was having a hard time with my questions, this site is great. thanks again!
*October 10, 2010*

**Critical Reading**

so outlining the content is that meaning the whole paper? I was confused
*October 10, 2010*

**Critical Reading**

c?
*October 10, 2010*

**Critical Reading**

As a critical reader, before you begin an evaluation you should be able to a)highlight and underline interesting facts. b) outline the content. c)locate the author's conclusion
*October 10, 2010*

**Critical Reading**

false
*October 10, 2010*

**Critical Reading**

Critical readers would not ask the same questions of themselves that they ask of the writer's work. true or false thanks!
*October 10, 2010*

**Critical Reading**

thx!!
*October 10, 2010*

**Critical Reading**

Making inferences is an abstract critical thinking skill that involves the active and blended use of several sources of information, including a.)the application of the basiic method of problem solving b)using background knowledge,personal experience, and clues/facts of the ...
*October 10, 2010*

**math-algebra**

I got 422.08 but it says that is still wrong can you help
*October 9, 2010*

**math-algebra**

A launched rocket has an altitude, in meters, given by the polynomial h = vt -4.9t^2, where h is the height, in meters, from which the launch occurs, at velocity v in meters per second, and t is the number of seconds for which the rocket is airborne. If a rocket is launched ...
*October 9, 2010*

**CALCULUS!!!(revised) please help**

A price (in dollars) and demand for a product are related by 2x^2-5xp+50p^2=21200 If the price is increasing at a rate of 2 dollars per month when the price is 20 dollars, find the rate of change of the demand. Rate of change of demand =
*October 7, 2010*

**CALCULUS!!!**

A price (in dollars) and demand for a product are related by If the price is increasing at a rate of 2 dollars per month when the price is 20 dollars, find the rate of change of the demand. Rate of change of demand =
*October 7, 2010*

**bus stats**

60% of households have internet, what is the probability that 3 randomly selected households will have internet?
*October 6, 2010*

**posting again! please help!! physics**

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to the ground, what is...
*October 6, 2010*

**physics!!**

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to the ground, what is...
*October 5, 2010*

**3rd grade**

write in order from least to greatest the six numbers whose digits are 2, 8, and 9
*October 5, 2010*

**physics**

A block of weight w = 25.0 N sits on a frictionless inclined plane, which makes an angle = 25.0 with respect to the horizontal, as shown in the figure. A force of magnitude F= 10.6 N , applied parallel to the incline, is just sufficient to pull the block up the plane at ...
*October 3, 2010*

**Physics**

yes, he will be able to make it to the other roof.
*October 2, 2010*

**Medical**

Select an accreditation agency and name an area of records management that is affected by its guidelines? How does accreditation affect the practical activities of record management in hospitals?
*October 2, 2010*

**PHYSIC help!**

a cart is pushed uphill on a ramp, goes up and momentarily stops, and then goes back down. predict the position vs. time, velocity vs. time, and the acceleration vs. time for this. IDK how to do this! i tried on the first one. on the graph, i have it looking like an upside-...
*September 30, 2010*

**social studies**

litigants?
*September 29, 2010*

**8TH Grade social studies**

what does the constitution define treaty as?
*September 29, 2010*

**math**

The diameters of a wooden dowel produced by a new machine are normally distributed with a mean of 0.55 inches and a standard deviation of 0.01 inches. What percent of the dowels will have a diameter less than 0.57?
*September 28, 2010*

**childcare**

1 A check text book 2. is correct 3. is D 4. is A Everything else looks good
*September 28, 2010*

**childcare**

I would love to help, what is the name of the book. I remember taking this test...
*September 28, 2010*

**1st grade**

My son is in the first grade and he got this same exact math sheet. Guess our chidlren go to the same school Lol or we all in the same curricullum no mattter the school or teacher they all have the same lesson plan go figure. Well I just let my son write the math problem bout ...
*September 27, 2010*

**accounting**

What is the adjusting entry to this problem on Dec 31st? On October 15, the school agreed to teach a four-month class (beginning immediately) for an individual for $3,100 tuition per month payable at the end of the class. The services are being provided as agreed, and no ...
*September 23, 2010*

**math**

In a local college, 60% of the math majors are women. Fifteen math majors are chosen at random.
*September 21, 2010*

**math**

mary has 22 ribbons some of the ribbons are first place what expression shows how many of mary ribbons are not for first place
*September 21, 2010*

**math**

The theater group performed on Friday and Saturday night. Three hundred and twenty four attended on Friday, and 33 more attended on Saturday. How many people saw the show?
*September 19, 2010*

**math**

I have been asked to identify the "situation" in a story problem. What does that mean?
*September 16, 2010*

**3rd grade math**

Using four different digits, what is the least sun you can get when you add two 2-digit numbers? Write your problem.
*September 16, 2010*

**Calculus**

f(x)= x^3; f(x)= (x+DELTAx)-f(x)/ x^3
*September 15, 2010*

**Cultural Diversity**

What are the linguistics of Puerto Rican Americans
*September 13, 2010*

**Cultural Diversity**

What does familial conventions or statuses mean? Thank You
*September 12, 2010*

**Environmental Science**

What is a few terrestrial resource issues? I have to pick one to do a powerpoint and I need some ideas. Thank You
*September 10, 2010*

**com155**

In the passage below bold the adverbs and underline the adjectives. NYPD Detectives Christopher Danson and P.K. Highsmith (Dwayne Johnson and Samuel L. Jackson) are the baddest and most beloved cops in New York City. They don’t get tattoos – other men get tattoos of ...
*September 4, 2010*

**Environmental Science**

what are the health and environmental effects of sulfuric acid (H2SO4)?
*August 28, 2010*

**Environmental Science**

What are the sources of sulfuric acid (H2SO4)?
*August 28, 2010*

**Cultural Diversity**

what are two to three characteristics of Orientalism? How may Orientalism and prejudice contribute to hate crimes against Muslim and Arabic groups?
*August 26, 2010*

**math Help**

(-infinity, -2), (-2,0), (0,2), and (2, infinity)
*August 24, 2010*

**Chemistry**

What concentration of aqueous CaCl2 solution freezes at -10.2ºC? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m. A. 5.48 m B. 11.0 m C. 1.83 m D. 6.12 m E. 2.74 m
*August 21, 2010*

**Cultural Diversity**

What years did Sojourner Truth help free slaves and become visible in the fight against slavery through her speeches and publications?
*August 21, 2010*

**Cultural Diversity**

what year did Harriet Tubman help develope the Underground RailRoad?
*August 21, 2010*

**Algebra**

-2x+y+3z=7 x+2y+z=4 2x-3y-2z=-10 How do you solve this?
*August 20, 2010*

**statistics**

The ages of students at a university are normally distributed with a mean of 21. What percentage of the student body is at least 21 years old?
*August 17, 2010*

**Cultural Diversity**

Through out history have the Colonized English been effected by any of the following forms of discrimination, or did they participate in any of the following forms of discrimination? Dual labor market, environmental justice issues, affirmative action, redlining, double ...
*August 15, 2010*

**Cultural Diversity**

What does "glass ceiling, glass walls, or glass escalator mean"?
*August 15, 2010*

**Algebra**

Commuting students. At a well-known university, 1/4 of the undergraduate students commute, and 1/3 of the graduate students commute. One-tenth of the undergraduate students drive more than 40 miles daily, and 1/6 of the graduate students drive more than 40 miles daily. If ...
*August 11, 2010*

**reimbursement methods**

what formula do i follow for reimbursement the hospital receives from medicare
*August 9, 2010*

**college chemistry**

When solutions of AgNO3 and NaOH react, the balanced molecular equation is 2AgNO3(aq) + 2NaOH(aq) Ag2O(s) + 2NaNO3(aq) + H2O(l) How much Ag2O is produced when 0.200 g of AgNO3 and 0.200 g of NaOH react?
*August 7, 2010*

**math**

rewrite the statement using percent notation out of every100 eligible people 87 voted in a recent election
*August 7, 2010*

**math**

2/3/10=1.8/r
*August 7, 2010*

**Algebra**

Volume of a container? A cubic shipping container had a volume of a^3 cubic meters. The height was decreased by a whole number of meters and the width was increased by a whole number of meters so that the volume of the container is now a^3+2a^2 3a cubic meters. By how ...
*August 5, 2010*

**Math-please check my answer**

Find the slope of the following points(8,9) and (10,-9) -9 - 9 / 10 - 8 = -18/2 = -9 is the slope?
*August 1, 2010*

**math-PLEASE HELP**

so it would be -9 - 9 / 10 - 8 = -18/2 = -9 is the slope?
*August 1, 2010*