Tuesday

February 9, 2016
Total # Posts: 7,288

**chemistry**

DrBob222 i need the solution of this numerical problem step by step please
*May 5, 2013*

**chemistry**

a 35.0ml sample of 37% hcl solution has a density of 1.18g/ml. the sample is diluted to a volume of 0.125L. what is the molarity of the final solution ?
*May 5, 2013*

**chemistry**

37 % hcl solution
*May 5, 2013*

**chemistry**

a 35.0ml sample of 37 hcl solution has a density of 1.18g/ml. the sample is diluted to a volume of 0.125L. what is the molarity of the final solution ?
*May 5, 2013*

**Analytic Geometry**

What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0 .
*May 5, 2013*

**Geometry**

Parallelogram ABCD has ÚABC=x ∘ and ÚBCD=2x ∘ +111 ∘ . What is the value of x ?
*May 4, 2013*

**Algebra**

If the ratio of x+y to x−y is 11/4, then the ratio of y to x can be written as a/b where a and b are coprime positive integers. Find a+b .
*May 4, 2013*

**science**

What is heat energy? Where does it come from, and what are its properties? Include in your discussion the following terms: molecules, conduction, convection, and radiation.
*May 2, 2013*

**algebra**

Cryptic Quiz 1. What do you call a skydiver with the flu? 2. How do you crash a houseboat party?
*May 2, 2013*

**physics**

Two cars collide head on and stick together. The one moving East was going 20.00 m x sec-1 and had a mass of 1500.0 kg. The one heading West was going 25.00 m x sec-1 and had a mass of 1000.0kg. I n which direction were the two cars moving and how fast were they moving?
*May 2, 2013*

**statistics**

Linda Silbers is a social scientist studying voter opinion about a city bond proposal for a light rail mass transit system in Denver If Linda wants to be 90 percent Confident that her sample estimate of the proportion of voters who favor the bond is within 2 percent of the ...
*May 2, 2013*

**physics**

A projectile was fired out of a lead ejector at an angle of 45 degrees up from horizontal. The projectile velocity was 1000.00 meters per second. How high did it go? and how far did the projectile go?
*May 2, 2013*

**Calculus**

Consider the lamina ( with uniform density .01m) having the shape of the region Q in the xy-plane: 1≤x^2+y^2≤4. The density at each point P varies directly with the distance from P to the origin, with density at the point P(2,0,0) being 10kg/m3.Find the polar ...
*May 2, 2013*

**Math-calculus**

Evaluate ∫∫ln(x^2+y^2)/sqrt(x^2+y^2) dA where 1≤x^2 +y^2≤e
*May 2, 2013*

**English**

Can someone correct these questions, please? Thank you very much in advance. 1) Briefly outline the features of the 18th-century novel focussing on the type of narrator, the hero and the time and place setting. 2) Analyze the structure of Swift's Gulliver's Travels ...
*May 1, 2013*

**Analytic Geometry**

What is the equation of a circle passing through (-4,-4) and tangent to the line 2x-3y+9=0 at (-3,1)?
*April 30, 2013*

**accounting 206**

asasas
*April 29, 2013*

**Chemistry**

What is the pH of a solution prepared by mixing 50.00 mL of 0.10 M NH3 with 25.00 mL of 0.10 M NH4Cl? Assume that the volume of the solutions are additive and that Kb= 1.8 × 10-5 for NH3.
*April 29, 2013*

**business math**

One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to $600,000, what are the total sales of the company? (Points : 2)
*April 28, 2013*

**physis**

A ball of mass 80kg falls from rest from a height of 100m.neglecting air resistance, calculate it K.E after falling a distance of 30cm
*April 28, 2013*

**Physics**

The boom weighs 2450 and is attached to a friction less pivot at its lower end. It is not uniform; the distance of its center of gravity from the pivot is 39.0% of its length. What is the tension in the guy wire? Link to picture of problem which is needed to solve the problem...
*April 28, 2013*

**Physics**

The boom weighs 2450 and is attached to a friction less pivot at its lower end. It is not uniform; the distance of its center of gravity from the pivot is 39.0 of its length. What is the tension in the guy wire? Link to picture of problem which is needed to solve the problem...
*April 27, 2013*

**Physics**

Add com after tinypic
*April 27, 2013*

**Physics**

The boom weighs 2450 and is attached to a friction less pivot at its lower end. It is not uniform; the distance of its center of gravity from the pivot is 39.0 of its length. Picture Link: tinypic./view.php?pic=53qp3m&s=5 What is the tension in the guy wire?
*April 27, 2013*

**Chemistry**

Calculate the percent ionization of 0.140 M lactic acid in a solution containing 8.5×10−3 M sodium lactate.
*April 27, 2013*

**economics**

hi new to economics, and struggling with some of its concepts. got this posed as a homework question, and i have to admit stumped as how to begin. Suppose a firm finds that the marginal product of capital is 60 and the marginal product of labor is 20. If the price of capital ...
*April 26, 2013*

**Physics**

I need the formulas for Q5 , Q6 and Q7
*April 26, 2013*

**Math**

Math Problem: Find the area of a circle that has a radius of 14 feet. Round your answer to the nearest hundredth. Would someone please check the way I worked this and let me know if I did it correct or not? Thank You A=3.14 (14ft)2 A=3.14 (196) A=615.44 Im thinking I didn'...
*April 26, 2013*

**statistics**

out of ten questions two students got 8 wrong find out probability if they are cheating
*April 25, 2013*

**Math**

How do you find the length of the base of a triangle? My math problem is: The area of a triangle is 33.6 inches. If the height is 4 inches what is the length of the base? thank you
*April 25, 2013*

**A.P. Chemistry**

Thorium-232 undergoes alpha decay and has a half-life of 1.4 * 10^10 years. How long will it take for a 1.00mg sample of thorium-232 to be reduced to 0.5mg?
*April 25, 2013*

**chemistry**

A 33.0g sample of nitrogen, N2 has a volume of 42.0L and a pressure of 640.mmHg. What is the temperature, in kelvins and degrees Celsius, of the gas?
*April 24, 2013*

**Public Speaking**

when speaking about abstracts concepts, make them concrete to the audience by?
*April 24, 2013*

**physics**

A standard man climbs 10 m up a vertical rope. How much energy in calories is dissipated as heat in a single climb if 20% of the total energy required is used to do the work?
*April 24, 2013*

**Math**

Compare the areas of two rectangular regions if the length of one rectangular region is double that of the other, and the width is triple that of the other. (Use an algebraic formula.)
*April 24, 2013*

**Biology**

you are studying a single-gene locus with two alleles in a population that is in Hardy-Weinberg equilibrium. Examination of a large sample of individuals from the population reveals there are six times as many heterozygotes as there are homozygote recessive individuals in this...
*April 23, 2013*

**biology**

In a natural population of outbreeding plants, the variance of the total number of seeds per plant is 16. From the natural population, 20 plants are taken into the laboratory and developed into separate true-breeding lines by self-fertilization—with selection for high, ...
*April 23, 2013*

**maths**

the frst term of AP is 4 and the last term is 79.given that the sum of the AP is 996, find the number of terms and the commmon difference.
*April 23, 2013*

**Health**

What physical changes do individuals encounter at the first stage of stress (alarm)?
*April 22, 2013*

**Health**

Can you please Analyze the health impacts of the second stage of stress (Resistance?
*April 22, 2013*

**english**

write your points for or against the motin which states that 'excessive self confidence is indisputably a boon and not a bone .750 words
*April 22, 2013*

**maths**

In an AP the first term is 2 and the nth term is 29 and the sum of the n term is 155 find n
*April 22, 2013*

**physics**

suppose that there are 1.9*10^25 stars in the universe. how many moles of stars would this be?
*April 22, 2013*

**physics 70**

d) F = ma (in the 'y' direction) *ball at bottom mean 'T' is upward and 'mg' is downward* T - mg = ma T - mg = m(v^2/r) (r(T - mg))/m = v^2 v = sqrt((r(T - mg))/m) v = sqrt((.85(22.5 - (.275*9.8))/.275) v = 7.82 m/s
*April 21, 2013*

**physics 70**

c) F = ma (in the 'y' direction) *ball at top means 'T' and 'mg' are pointing "downward"* -T -mg = ma -T = mg + ma T = -mg -ma T = -m(g + v^2/r) T = -.275(9.8 + (5.20^2/.85)) T = -11.4 N, or, 11.4 N downward
*April 21, 2013*

**Chemistry**

Assume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 4.00*10^2 mL of solution and then titrate the solution with 0.138 M NaOH. C6H5CO2H(aq) + OH-(aq) C6H5CO2-(aq) + H2O(l) Find concentration of Na+ at equivalence point.
*April 21, 2013*

**Chemistry**

Calculate the H3O+ ion concentration and the pH at the equivalence point when 45.0 mL of 0.4000 M NH3 is mixed with 45.0 mL of 0.4000 M HCl. Ka=5.6x10-10
*April 21, 2013*

**Chemistry**

Calculate the H3O+ ion concentration and the pH at the equivalence point when 45.0 mL of 0.4000 M NH3 is mixed with 45.0 mL of 0.4000 M HCl. Ka=5.6x10-10
*April 21, 2013*

**Physics**

1. Ohm's Law states that for some circuits the voltage is proportional to the current. In other words, if you double the voltage, you will double the current. Which of these equations agrees with this statement of Ohm's Law? (∝ means "is proportional to"...
*April 18, 2013*

**Statistics**

The design tolerance thickness for an automotive part is 55mm to 65mm. If the process mean thickness is 61mm with a standard deviation of 2.3mm, then what percentage of the sheets will be acceptable?(What percentage will fall within the design tolerence?) Assume that the ...
*April 18, 2013*

**News opinion a**

- The driver of an Okaloosa County EMS ambulance passed out before he caused a five-vehicle crash at Mary Esther Cut-Off and Wright Parkway on Tuesday evening, according to police. David M. Keller, 40, of Baker, was talking with his partner as he drove the ambulance south on ...
*April 18, 2013*

**finance**

. Fargo Industries has outstanding 30 year bonds at 7% semiannual payments. The bond sells at 90% of its face value. If their tax rate is 22%: a.What is the aftertax cost of debt? b. What is the pretax cost of debt? c. Which is more important in calculating the cost of capital...
*April 17, 2013*

**science**

If 1.38 g of steam at 100.0°C condenses into 38.6 g of water, initially at 27.6°C, in an insulated container, what is the final temperature of the entire water sample? Assume no loss of heat into the surroundings. °C
*April 16, 2013*

**statistic**

A sample of 59 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 25 years. The population variance is 19. (a) Give a point estimate for μ. (Give your answer correct to one decimal place.)
*April 16, 2013*

**Physics**

he equation of a transverse wave on a string is y = (4.8 mm) sin[(14 m-1)x + (440 s-1)t] The tension in the string is 10 N. (a) What is the wave speed? (b) Find the linear density of this string.
*April 16, 2013*

**Help with statistics**

how u came up with 2.61 and 1.54
*April 16, 2013*

**english**

With in sentence should town also be capitalized? The town of Blair, Nebraska, is home to Dana College.
*April 16, 2013*

**English**

Can someone check these questions, please? Thank you in advance In Shelley's Frankenstein, what are the traits that remind us of a Gothic novel? 2)Discuss the concepts of beauty and youth as portrayed by Lord Henry in chapter 2 of O. Wilde's The Picture of Dorian Gray...
*April 15, 2013*

**Livingston High**

61/3 =
*April 15, 2013*

**Math**

The mean time to complete a certain stat quiz is 25 minutes, with a standard deviation of 5 minutes. Find the probability of a student taking. 1.) less than 15 minutes. 2.) Between 15 and 25 minutes. 3.)more than 25 minutes.
*April 14, 2013*

**English**

3. Talk with your partner and check the Yes box if your partner likes the activity. If your partner doesn't like the activity, check the no box. ("likies") -> likes. other than that it is grammatically correct.
*April 14, 2013*

**Histroy**

Once they arrived in the United States, immigrants experienced a life very different from what they imagined. Which was not something that was most immediately part of their experience? (Points : 1) Labor scams Low skilled work Religious tolerance Assimilation
*April 14, 2013*

**Physics multiple choice**

3. What are the units for Coeffecient of Lift? [kgm^-3] No units [Ns] [N^2] [N] [ms^-1] [kg] 4. What are the units for the ratio Lift to Drag? [Ns] [kgm^-3] No units [ms^-1] [kg] [N^2] [N]
*April 12, 2013*

**Geometry**

A set of three distinct positive integers has mean 4 and median 5. What is the largest number in the set?
*April 11, 2013*

**Geometry**

I saw the the problem already answered but I just don't get what is a and what is b.
*April 11, 2013*

**Geometry**

Two players each flip a fair coin. The probability that they get the same result can be expressed as a b where a and b are coprime positive integers. What is the value of a+b ?
*April 11, 2013*

**English**

Thank you! I left out these sentences on Owen's life. Thank you. 1) Wilfred Owen enlisted as a soldier in 1915. During his first mission in France, he spent some time in hospital to recover from shell shock. 2) There, he met poet Siefried Sassoon who read his poems and ...
*April 10, 2013*

**English**

Can somone check if my sentences on Owen's poem "Dulce and Decorum est" are correct? Thank you very much The title of his 1917 poem Dulce et Decorum Est translates to “It is sweet and right” – a direct quotation from Ode, written by Latin poet ...
*April 10, 2013*

**Statistics**

In his management information systems textbook,Professor David Kroenke raises and interesting point:"If 98% of our market has Internet access,do we have a responsibility to provide non-Internet materials to that other 2%?Suppose that 98% of the customers in your market ...
*April 9, 2013*

**Physics**

Platform area = 0.027[m2]. Wind Speed = 7.1[ms-1]. Air Density = 1[kg m-3]. Drag = 0.39[N]. Lift = 1.45[N]. Coeffecient of Lift = Use three sig. figs. or N/A if no answer. Platform area = 0.045[m2]. Wind Speed = 5.7[ms-1]. Air Density = 1[kg m-3]. Drag = 0.77[N]. Lift = 1.19[...
*April 7, 2013*

**math**

A rectangular garden is 20 m by 25m. It is surrounded by a sidewalk. The outside perimeter of the sidewalk is 114m. What is the width of the sidewalk?
*April 7, 2013*

**English**

I want to learn how to write an appropriate letter to the editor in no more than 200 words. I took the article "stuck in the middle" by Jeevan Vasagar of "The Guardian" as an exercise, you can find it on Google. Unfortunately, I am not allowed to post ...
*April 7, 2013*

**Physics**

A 35kg child is swinging on a swing with length 2.8m to the bottom of the seat. At the highest point of the swing, the rope makes an angle of 42 degrees from vertical. Calculate the speed of the child at the bottom of the swing. Assume no thermal energy is created. Calculate ...
*April 5, 2013*

**Physics**

A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that it's distance from the cave wall is 19 m.
*April 4, 2013*

**English**

Thank you
*April 4, 2013*

**English**

I don't understand the question please explain
*April 4, 2013*

**English**

Pretend you are a modern social worker, educator, environmentalist, or military advisor to the president. Attack an evil you see the work by writing an ironic proposal and the proposal have to be outrageous
*April 4, 2013*

**statistics**

An educational researcher studying the ages of freshmen at community colleges took a sample of 12 students. The data below represent the ages of the students sampled
*April 3, 2013*

**Statstistics**

Chicken Delight claims that 91% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 90 orders revealed that 75 were delivered within the promised time. At the 0.10 significance level, can we conclude that less than 91% of the orders are ...
*April 3, 2013*

**government**

Thank you.
*April 2, 2013*

**government**

So it is B I get it.
*April 2, 2013*

**government**

Is it A? Ms. Sue
*April 2, 2013*

**government**

I think C
*April 2, 2013*

**government**

what is the implied power expressed by the necessary and proper clause in the constitution a congress's ability to make laws is severely limited by the Constitution b congress is given limited authority to interpret reserved powers c congress must follow a concrete ...
*April 2, 2013*

**math**

Bank A interest per years = (2.46*30000)/100= $738 per year Bank B interest (2.48*30000)/100=744 Bank c interest (2.47*30000)/100=741 So Bank B the most interest at the end of one year.
*April 2, 2013*

**Chemistry**

You have .8 liters of a 0.5M HCl solution. If you use this solution to complete a decomposition reaction of HCl how many moles of hydrogen (H2) would be produced?
*April 2, 2013*

**government**

congress shares power with the president in the field of foreign affairs. what other powers do congress and the president share? a judicial powers b postal powers c territorial powers d war powers
*April 2, 2013*

**government**

which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress
*April 2, 2013*

**government**

which of the following determines who holds the position of speaker of the house?
*April 2, 2013*

**English**

Can someone check these sentences I need to prepare for tomorrow? Thank you. 1) Troy has been at the BRIT School since he was 14. Before that he was in a normal secondary school. 2) Unlike in a normal secondary school, students at the BRIT study all the ordinary academic ...
*April 2, 2013*

**Physics**

94860m
*April 2, 2013*

**biology**

) To test linkage between the feather texture and feather color genes you complete a test cross with the F1, and find that the feather texture and feather color genes are linked. Only part of the data from the test cross is given below. Complete the table by giving the four ...
*April 2, 2013*

**Algebra help!!**

help please!! 1. There is an E like symbol that has a 7 at the top. On the bottom k=1 and on the right side (-1)^k K 2. There is an E like symbol that has a 8 at the top. ON the bottom K=3 and on the right side (-1)K/K(k-2)
*April 1, 2013*

**math: Algebra**

Three cylindrical tubes with with a 12 in diameter are strapped together by a plastic band. How long is the band?Suppose that four of the same tubes are strapped together with a snugly fitting plastic band how long is the band?
*April 1, 2013*

**Algebra **

I have two problems that I need some help with. I believe I got to the answer but not quite sure if its right. I need to expand and evaluate each series. 1. There is an E like symbol that has a 7 at the top. On the bottom k=1 and on the right side (-1)^k K 2. There is an E ...
*April 1, 2013*

**Algebra help **

I need some help I posted the first question to this a bit ago but didnt enter it correctly so sorry to those who helped! I also have a 2nd half which I understood till they added the dividing part. I need to find the first five terms of each recursive sequence. 1.C1=64, C2=32...
*April 1, 2013*

**biology**

Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both red-green color blind and a hemophiliac. Individual 6 is the as yet unborn son of 4 and 5. What is the probability that their son, 6, will be both color blind and a hemophiliac? Express your ...
*March 31, 2013*

**Chemistry**

What are the concentrations of A– and HA after 24 mL of 0.33 M hydrochloric acid solution is added to 86 mL of a solution that has [A– ]=0.67 M? Do NOT consider any equilibrium reactions in this problem. A–(aq) + HCl(aq) → HA(aq) + Cl–(aq) How do I ...
*March 31, 2013*

**Physics**

A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.1 kg and the sign has a mass of ms = 16.4 kg. The length of the beam is L = 2.83 m. The sign is attached at the very end of the beam, but the horizontal wire holding up the beam is attached...
*March 31, 2013*