Wednesday

August 27, 2014

August 27, 2014

Total # Posts: 1,072

**AP CHEMISTRY HELP**

Thank you so much. Also, would this same procedure be used for when there's an air bubble in the titration?
*December 20, 2012*

**AP CHEMISTRY HELP**

a) A student fails to wash the weighing paper when transferring the KHP sample into the beaker. What effect does this error have on the calculated molarity of the NAOH solution? Mathematically justify your answer. b) A student failed to notice an air bubble trapped in the tip ...
*December 20, 2012*

**math**

explian in writing how waould you use a number line to round 148 to the nerst ten
*December 4, 2012*

**physics, please help!**

(a) Find the current in each resistor of the circuit shown in the figure byusing the rules for resistors in series and parallel. (b) Write three independent equations for the three currents using Kirchhoff’s laws: one with the node rule; a second using the loop rule ...
*November 28, 2012*

**precalculus**

Why can't you answer your own homework questions? You can't stroll through life being a cheater.
*November 27, 2012*

**Math Essentials**

How many ways can an IRS auditor select 4 of 9 tax returns for an audit?
*November 27, 2012*

**Chemistry**

True because I did learn that the lower the pH the more acidic it is.
*November 25, 2012*

**Chemistry**

The hydronium ion concentration in coffee is 1 x 10^-5 M. What is the pH of coffee?
*November 25, 2012*

**Chemistry**

The hydronium ion concentration for a solution is determined to be 4.5 x 10^-7 M. What is the concentration of the hydroxide ion? I just wanted to let the people that are being nice enough to help me know that this is for a study guide. It is not a test or quiz. :0) Thanks.
*November 25, 2012*

**chemistry**

I want to say because it has more of the reactant. Am I right?
*November 25, 2012*

**chemistry**

Write a balanced equation for the proton transfer reaction between water and phosphate ion. Determine in which direction the equilibrium is favored.
*November 25, 2012*

**Chemistry**

When a 5.00 ml sample of vinegar is titrated, 44.5 ml of 0.100 m NAOH solution is required to reach the end point. What i sthe concentration of vinegar in moles per liter of solution?
*November 25, 2012*

**Chemistry**

How much heat would be released by burning one gallon of octane? The density of octane is 0.703g/mL. 1 gallon= 3.79 liters.
*November 21, 2012*

**algebra**

Do the equations x = 4y + 1 and x = 4y – 1 have the same solution? Justify your answer with an explanation or a graph. How might you explain your answer to someone who has not learned algebra?
*November 20, 2012*

**english**

Select the gerund phrase in the sentence below. Then, determine the noun function of the gerund. 1. Water skiing, sailing, and swimming are my favorite summer sports. 2. I enjoy playing the piano.
*November 16, 2012*

**physics**

A 50.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11~ 10-8 ƒ¶m and the density is 7.86 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 ƒ...
*November 15, 2012*

**Analytic Geometry**

Please help. I've been trying to solve these for more than an hour now but I can't seem to get it. 1) The segment joining (-4,7), (5,-2) is divided into two segments, one of which is 5 times as long as the other. Find the point of division. 2) The segment joining (4,0...
*November 14, 2012*

**Math**

Mr. Smith is purchasing a $190000 house. The down payment is 20% of the price of the house. He is given the choice of two mortgages: (A) a 25-year mortgage at a rate of 8%. Find: (i) The monthly payment: $ (ii) The total amount of interest paid: $ (B) a 15-year mortgage at a ...
*November 8, 2012*

**AED200**

a 700- to 1,050-word paper in which you outline the steps required for a multicultural education to be effective. Describe types of activities you would incorporate into your classroom that would support a multicultural education for all groups in this class. How could each ...
*November 3, 2012*

**Health**

So, it's C right?
*October 25, 2012*

**sociology**

Smiling and making polite remarks to people we do not like is an example of: A) making another feel embarrassment. B) exercising power over another. C) idealizing a personal performance. D) using tact.
*October 24, 2012*

**math**

find the interest rate to the nearest hundredth of a percent that will produce $2500, if $2000 is left at interest compounded semiannually for 4.5 year
*October 23, 2012*

**Chemistry**

What is the molar concentration of nitrate ions in a 0.161M magnesium nitrate(aq) solution?
*October 22, 2012*

**Business**

Choose a product you wish to market. You will follow this product through all four P's of Marketing. Describe your goal. Is it to maximize quantity, market penetration, market share, gross revenue, profit, or other goal (such as social change)? In your one to two page ...
*October 21, 2012*

**Marketing**

Identify the product concepts you used in determining the packaging. How does the packaging affect the effectiveness of the packaging? Are there any physical, social, or economic restraints that could limit or enhance your packaging? Market Research Product Concepts
*October 21, 2012*

**college physics**

A student moves a box of books by attaching a rope to the box and pulling with a force of 80.0 N at angle of 45o. The box of books has a mass of 25.0 kg and the coefficient of kinetic friction between the bottom of the box and the sidewalk is 0.43. Find the acceleration of the...
*October 21, 2012*

**Science**

. Which of the following is a measure of motion, with the derived units in m/s? power force resistance speed
*October 17, 2012*

**Geometry**

To approach a runway, a plane must began a 7 degree descent starting from the height of 2 miles above the ground. To the nearest mile, how many miles from the runway is the airplane at the start of this approach?
*October 16, 2012*

**chemistry**

how much heat is released when 42.3 grams of ammonia is produced?
*October 8, 2012*

**Chemistry**

Muriatic acid is the common name of industrial-grade hydrochloric acid (HCl). One of its uses is to clean or etch concrete in preparation for sealing or painting. It is typically sold in 5.00 gallon buckets, with a concentration of 11.7 M. a.What volume of concentrated ...
*October 5, 2012*

**Stats**

On her first test in algebra, Mary earned a score of 75, and she made an 85 on her first psychology test. If the average score on the algebra test was a 68, with s=7, and the average on the psychology test was 91, with s=6, is Mary doing better in psychology or algebra. Why?
*October 4, 2012*

**math**

I am a two digit number, twice the sum of my digits is 22. The product of my digits is 24.My tens digit is greater than my ones digitwhat number am I?
*October 2, 2012*

**math**

Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5? 1) commutative property of addition 2) distributive property 3) additive identity 4) additive inverse
*October 1, 2012*

**writing**

what is the prepositional phrase in the following sentence, What is the price of the blue 2006 Honda Civic in the last row of cars on the lot?
*September 27, 2012*

**Math**

find a polynomial of least degree(having real coefficients) with zeros: 5, -2, 2i
*September 27, 2012*

**earth**

what is geography?
*September 20, 2012*

**Chemistry**

Which element has no stalbe isotopes: 82Pb, 27Co, 51Sb or 90Th?
*September 15, 2012*

**history**

What caused the rapid population growth of homo sapiens
*September 13, 2012*

**math**

x^2=8x-9 solve by completing the square to obtain exact solutions
*September 12, 2012*

**Physics**

Three men are trying to move a wardrobe. One pushes northward with a force of 100N; the second pushes eastward with a force of 173N; the third pushes in a direction 60 degrees west of south with a force of 200N. What is the resultant force on the wardrobe and it's direction?
*September 11, 2012*

**Chemistry**

In solution, hypochlorite ion is known to decompose with a second-order rate law. If [ClO-]0 = 0.0570 M and k = 2.06x10-4 M-1·min-1, calculate the half-life for this reaction 2ClO- 2Cl- + O2.
*September 6, 2012*

**Chemistry**

Calculate the temperature at which k = 2.0 s-1 if k = 10.0 s-1 at 371 K. The activation energy for the reaction is 30.0 kJ mol-1.
*September 6, 2012*

**math**

if the weight of a fish varies jointly as the length and the square of the girth, and if a fish 11 inches long with a girth of 7 inches weighs 0.7lbs, find the weight of a fish 23 inches long with a girth of 18 inches.
*September 5, 2012*

**math**

if Y varies jointly as X and the square of Z, and if Y=24 when X=2 and Z=6, find Y when X=10 and Z=9
*September 5, 2012*

**algebra**

an airplane is flying at an altitude of 3200 feet. an air- traffic controller in the tower keeps constant track of the planes distance from the tower in X feet. express the horizontal distance from the tower to a point directly below the airplane,d, in terms of X.
*September 5, 2012*

**algebra**

a rancher has 310 feet of fencing with which to enclose two rectangular corrals, both of the same size. the two corrals will share one side, and a barn forms one side of both corrals. suppose the width of each corral is X feet. express the total area of the two corrals as a ...
*September 5, 2012*

**math**

a farmer has 200 yards of fencing to enclose three sides of a rectangular piece of property that lies next to a river. the river will serve as the fourth side. find the dimensions of property if the area is 3200 yards^2
*September 5, 2012*

**Geometry **

Angle ABC and ange DBE are vertical angles,the measure of angle ABC =3x+20, and the measure or angle DBE =4x-10. Write and solve an equation to find the measure of angle ABC and the measure of angle DBEin
*September 2, 2012*

**Geometry **

Angle ABC and ange DBE are vertical angles,the measure of angle ABC =3x+20, and the measure or angle DBE =4x-10. Write and solve an equation to find the measure of angle ABC and the measure of angle DBEin
*September 2, 2012*

** college math**

prove f(x)= x^15+6 is increasing on the interval: I= (-‡,‡)
*September 1, 2012*

**math**

How fast would a ball have to be thrown upward to reach a maximum height of 49 ft? [Hint: Use the discriminant of the equation 16t2 − v0t + h = 0.]
*September 1, 2012*

**English**

For this quote 'their intercourse had been one continued series of opposition. Their opinions clashed; and indeed, she had never perceived that he had cared for her opinions, as belonging to her, the individual', can someone find a technique in it? It's a good ...
*August 31, 2012*

**HEALTH**

Correct
*August 22, 2012*

**health**

Yes, B is correct
*August 13, 2012*

**health**

It is D
*August 11, 2012*

**Science**

Which of the following is a vector quantity? speed weight distance traveled mechanical energy Which of the following is a scalar quantity? work velocity acceleration displacement
*August 8, 2012*

**stats**

If 95% of all people between 21 and 50 have had at least one adult beverage in their life, find these probabilities for a sample of 10 people in that age group: a) Exactly 10 have had an adult beverage b) At least 6 have had an adult beverage c) At most 8 have had an adult ...
*August 4, 2012*

**math**

I need a lot of help on multiplication and division.Will you help me?
*July 31, 2012*

**Science 10**

The symbol of the lead(IV) ion is ?
*July 26, 2012*

**trig HELP**

A barn is 30ft. wide by 60ft long; the rafters make an angle of 40degrees with the horizontal. Find the area of each of the two gable ends and the area of the roof. Please Include Solution And If Possible An Illustration. Thank You In Advance :)
*July 5, 2012*

**trig**

Find the radius of a circle which a 59-foot chord subtends an angle of 12degrees at the center. I Just Want To See The Illustration. I Can Handle The Rest. Thank You In Advance =)
*July 3, 2012*

**Algebra**

Given f(x) = radical x-2 and g(x) = x2 – x – 6. Find (g o f)(6). A. -4 B. 2 C. 24 D. 26 E. 48
*July 1, 2012*

**Algebra**

Given f(x) = radical x-2 and g(x) = x2 – x – 6. Find (f – g)(6). A. -26 B. 26 C. -22 D. 22 E. 2
*July 1, 2012*

**Trigonometry**

A person on a ship sailing due south at the rate of 15 miles an hour observes a lighthouse due west at 3p.m. At 5p.m. the lighthouse is 52degrees west of north. How far from the lighthouse was the ship at a)3p.m.? b)5p.m.? c)4p.m.? Please Show The Solution So That I Can Study...
*June 23, 2012*

**math foundations 20**

a right hexagonal prism is enlarged by a scale factor of 5.7 a)determine the value of volume of large prism/volume of small prism. do not round answer.. how do i figure this out?
*June 20, 2012*

**Math**

The horizontal range, R, is modeled by this formula: R(x)=(v^2*sin2(x))/32 The initial velocity (v) is 90ft per second. The ball is pitched at an angle of x degrees with the horizontal. When x=26 degrees, the ball travels 200ft. At what other value of x will the ball travel ...
*June 16, 2012*

**Geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*June 5, 2012*

**Geometry**

A plane is is flying 225 mph heading S25°W. The wind is blowing S80°E at 60 mph. 11. What is the bearing of the plane? 12. What is the smallest angle of the triangle? 13. What is the largest angle of the triangle? 14. What is the remaining angle of the triangle? 15. ...
*June 5, 2012*

**Geometry**

A plane is is flying 240 mph heading N60°E. The wind is blowing S30°E at 30 mph. 6. What is ground speed of the plane? 7. What is the smallest angle in the triangle? 8. What is the biggest angle in the triangle? 9. What is the remaining angle in the triangle? 10. What ...
*June 5, 2012*

**Geometry**

A plane is heading west at 200 mph. The wind is blowing S30°W at 25 mph. 1. What is the ground speed of the plane? 2. When you solve the triangle, what is the smallest angle? 3. What is the largest angle of the triangle? 4. What is the remaining angle? 5. What is the ...
*June 5, 2012*

**Geometry**

A plane is heading west at 200 mph. The wind is blowing S30°W at 25 mph. 1. What is the ground speed of the plane? 2. When you solve the triangle, what is the smallest angle? 3. What is the largest angle of the triangle? 4. What is the remaining angle? 5. What is the ...
*June 4, 2012*

**chemistry**

Marla drives her car to school each day. If it takes her 12 minutes to drive one way, how many hours a week does Marla spend driving? (Express the answer in decimal form.)
*May 30, 2012*

**chemistry**

What is the specific heat of an unknown substance if 2000 J of energy are required to raise the temperature of 4 grams of the substance 5 degrees Celsius?
*May 30, 2012*

**science**

- thanksss . ^_______^
*May 29, 2012*

**science**

i think its number 4 .
*May 29, 2012*

**science**

2 or 3 >????? -_-
*May 29, 2012*

**science**

the threat of global warming is mainly associated with ? 1 radioactive wastes 2 use of hydroelectric energy 3 burning of fossil fuels 4 thermal pollution of lakes and rivers
*May 29, 2012*

**Geometry**

A plane is heading west at 200 mph. The wind is blowing S30°W at 25 mph. 1. what is the ground speed of the plane? I could not figure this one out. Please help?
*May 21, 2012*

**algebra**

The equation that describes the path of a small rocket after it is shot into the air is h=1120-16t^2, where h is the height above the ground, in feet, after t seconds. How many seconds does it take for the rocket to return to the ground?
*May 19, 2012*

**business**

How does TerraCycle use its size and flexibility to gain a competitive advantage? How has the company extended its product line? How well do the new products fit the company’s strategy and image? Explain. How does TerraCycle’s culture reinforce its focus on innovation?
*May 15, 2012*

**MATH PLS HELP**

A research center claims that 50% of people believe that drivers should be allowed to use cellular phones with hands free devices while driving. In a random sample of 150 U.S. adults 58% say that drivers should be allowed to use cellular phones with hands free devices while ...
*May 11, 2012*

**Statistics**

A research center claims that 50% of people believe that drivers should be allowed to use cellular phones with hands free devices while driving. In a random sample of 150 U.S. adults 58% say that drivers should be allowed to use cellular phones with hands free devices while ...
*May 11, 2012*

**algebra 2**

Classify the conic section . Write its equation in standard form. 4x^2-y+3=0?
*May 3, 2012*

**algebra 2 please check**

Write an equation for a parabola with vertex at (-4 , 3) and focus at ( -4, -2)? I have this.... (X+4)^2=20(y-3)
*May 3, 2012*

**algebra 2 please check**

Identify the line(s) of symmetry for the conic section x-(y-1)^2=2 I have this... (Y-1)^2=(x-2) Vertex (2,1) Symmetry y=1. Is this correct?
*May 3, 2012*

**algebra 2**

Write the equation for a parabola with vertex (-2 , 3) and focus ( -2, 1).
*May 3, 2012*

**algebra**

Identify the line(s) of symmetry for the conic section x-(y-1)^2=2
*May 2, 2012*

**UMA**

Life Direction has three parts: vision, setting goals and a plan of action
*April 29, 2012*

**physics**

On July 15, 2004, NASA launched the Aura spacecraft to study the earth's climate and atmosphere. This satellite was injected into an orbit 705 {\rm km} above the earth's surface, and we shall assume a circular orbit. How many hours does it take this satellite to make ...
*April 27, 2012*

**Math**

prove the identity: sin^2 O/ 1-cos O = 1+cosO O= theta
*April 27, 2012*

**Physics. PLEASE HELP!!**

How do you calculate the y component. Answer in units of Nm. How do you calculate the z component. Answer in units of Nm.
*April 25, 2012*

**Physics. PLEASE HELP!!**

A force F=Fx ˆi + Fy ˆj + Fz ˆk acts on a particle located at X= (x, y, z). Given Fx=−88.3N, Fy=7.56N, Fz=60N, x= −3.65m, y=1.67m and z=7.03m, calculate the three components of the torque vector ~ = xˆi + y ˆj + z ˆ...
*April 25, 2012*

**Physics. PLEASE HELP!!**

Two ice skaters hold hands and rotate, making one revolution in 7.6 s. Their masses are 15 kg and 50 kg, and they are separated by 4.6 m. Find the angular momentum of the system about their center of mass. Answer in units of J · s Find the total kinetic energy of the ...
*April 25, 2012*

**Calc 1**

An 8 foot tall fence seperates Larry's yard from Evan's yard.The fence is 3 feet from Larry's house and runs parallel to the side of his house. Larry wants to paint his house and needs to position a ladder extending from Evan's yard over the fence to his house...
*April 24, 2012*

**Calculus**

A flower pot is dropped from a point 12 feet above the ground,so that it will land 4 feet from the base of a 12 foot lamppost. At what rate is the shodow of the flower pot moving along the ground when the pot is 8 feet above the ground?
*April 24, 2012*

**Physics. PLEASE HELP!!**

A force F=Fx ˆi + Fy ˆj + Fz ˆk acts on a particle located at X= (x, y, z). Given Fx=−88.3N, Fy=7.56N, Fz=60N, x= −3.65m, y=1.67m and z=7.03m, calculate the three components of the torque vector ~ = xˆi + y ˆj + z ˆ...
*April 23, 2012*

**Physics. PLEASE HELP!!**

Two ice skaters hold hands and rotate, making one revolution in 7.6 s. Their masses are 15 kg and 50 kg, and they are separated by 4.6 m. Find the angular momentum of the system about their center of mass. Answer in units of J · s Find the total kinetic energy of the ...
*April 23, 2012*

**writing**

Write a 150- to 200-word paragraph to explain how purpose, audience, tone, and content would impact the following topic: What do you hope to accomplish COM 155? Be sure to use the three components of a good paragraph covered in this week’s readings. In addition, be sure ...
*April 23, 2012*

**Physics. PLEASE HELP!!**

Consider a wheel (solid disk) of radius 0.748 m, mass 16 kg and moment of iner- tia 1/2 MR^2 . The wheel rolls without slipping in a straight line in an uphill direction 27 above the horizontal. The wheel starts at angular speed 20.5882 rad/s but the rotation slows down ...
*April 20, 2012*

**Physics. PLEASE HELP!!**

A uniform disk with a mass of 130 kg and a radius of 1.2 m rotates initially with an angular speed of 950 rev/min. A constant tangential force is applied at a radial distance of 0.5 m. How much work must this force do to stop the wheel? Answer in units of kJ
*April 20, 2012*

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