Monday

July 6, 2015

July 6, 2015

Total # Posts: 4,086

**calculus**

A 29-ft chain with mass density 3 lb/ft is initially coiled on the ground. How much work is performed in lifting the chain so that it is fully extended (and one end touches the ground).
*February 24, 2012*

**chemistry**

How many molecules in 8.221g PbO2?
*February 23, 2012*

**geometry**

find the altitude of an equilateral triangle with side length twelve
*February 23, 2012*

**geometry**

the base of an isoscels triangle is 4x long. the altitude to the base is 3x cm long. Find the length of one other side of the triangle
*February 23, 2012*

**physics--please help**

When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle? (The distance ...
*February 23, 2012*

**physics**

When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle? The distance between...
*February 22, 2012*

**calculus**

find lim x->0 3- sqrt x+9/-x
*February 19, 2012*

**world history**

thank you
*February 19, 2012*

**world history**

i need a website that proves that because i have to do a bibliography for this section of the senior project
*February 19, 2012*

**world history**

training like a student teacher something like that isn't that consider as a training
*February 19, 2012*

**world history**

i'm working on my senior project and i need some help i'm supposed to do some researches about my future career, however i couldn't find a website that tells me if a world history teacher needs an additional training or not ?
*February 19, 2012*

**math Statistics**

Hi I need help with Statistics. Can anyone help me to understand it better? I am in fear that if I do not figure this out soon I will fail my class. I am needing help with the chapters 12,and 13. in the book called Statistical Reasoning in the Behavioral Sciences, 6th edition...
*February 19, 2012*

**physics--please help**

Only need help with part c--answer for part a is 2.94 radians and for b it is 777 days Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be ...
*February 18, 2012*

**physics**

Only need help with part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are ...
*February 17, 2012*

**Government**

Cross pressured v?
*February 17, 2012*

**last Government**

These voters are caught between conflicting issues. young voters independent voters strong party voters cross-pressured voters
*February 17, 2012*

**Government**

When party loyalists select the candidates of their party, they vote a propaganda ticket. straight-party ticket. cross-pressured vote. landslide.
*February 17, 2012*

**Physics to drwl please help**

Only need help with part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are ...
*February 16, 2012*

**Math**

18th
*February 16, 2012*

**physics**

I need only part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are positioned such ...
*February 16, 2012*

**physics**

I need only part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are positioned such ...
*February 16, 2012*

**physics**

thanks
*February 15, 2012*

**physics**

not the right answer
*February 15, 2012*

**physics**

A particle is moving clockwise in a circle of radius 1.54 m. At a certain instant, the magnitude of its acceleration is a = 26.0 m/s2,and the acceleration vector has an angle of θ = 50° with the position vector, as shown in the figure. At this instant, find the speed...
*February 15, 2012*

**physics**

Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do ...
*February 15, 2012*

**physical science**

5/17=0.294 N
*February 15, 2012*

**physics**

it is d
*February 15, 2012*

**physics**

for L, are you using the answer from part a?? when i use that i get around 14 degrees
*February 15, 2012*

**physics**

Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do ...
*February 15, 2012*

**English 5 questions**

1. During this time period, writers sought to capture the _____________ of the American people during this era of a new postwar economy and society. peace anger anxiety all of the above 2. Like the modernists, postmodern writers focused on _____________ experience and ...
*February 15, 2012*

**physics**

thanks
*February 15, 2012*

**physics**

A man with a mass of 50 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe ...
*February 15, 2012*

**1 chem question**

A base has a Kb of 2.5 x 10–11. Which of the following statements is true? This is a concentrated base. This base ionizes slightly in aqueous solution. This is a strong base. An aqueous solution of this base would be acidic. (do explain. i dont understand this one)
*February 14, 2012*

**physics**

A man with a mass of 52 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe ...
*February 14, 2012*

**Physics**

Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many Oreos did Pepper ...
*February 14, 2012*

**Physics**

Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many Oreos did Pepper ...
*February 13, 2012*

**Chem**

Which of these solutions is the most basic? [H+] = 1 x 10–2 M [OH–] = 1 x 10–4 M [H+] = 1 x 10–11 M [OH–] = 1 x 10–13M i think its the first one?
*February 13, 2012*

**Chemistry**

I just wanted to say i found this question and if helped me so much with my homework! thank you so much DrBob222!!
*February 13, 2012*

**Algebra**

Find the square roots of 25
*February 11, 2012*

**Chem**

Which of the following statements is part of the kinetic theory? The particles of a gas move independently of each other. The particles in a gas move rapidly. The particles in a gas are relatively far apart. all of the above
*February 10, 2012*

**physics**

convert 52 g to kg and then 218 divided by that number
*February 10, 2012*

**physics**

I did that but i am not getting the right answer
*February 10, 2012*

**physics**

Betty Bodycheck (mB = 50.2 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
*February 10, 2012*

**physics**

The question is what are their final kinetic energy?
*February 10, 2012*

**physics**

Betty Bodycheck (mB = 50 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
*February 10, 2012*

**physics**

This means that for every action, there is an equal and opposite reaction
*February 10, 2012*

**math**

454.86
*February 9, 2012*

**physics**

A billiard ball of mass 0.16 kg has a speed of 1.80 m/s and collides with the side of the billiard table at an angle of 34.6°. For this collision, the coefficient of restitution is 0.841. What is the angle relative to the side (in degrees) at which the ball moves away from...
*February 9, 2012*

**Psychology**

As a consumer of mental health services, which type of therapy would you prefer if you did not like to talk about your problems? If you were suffering from a phobia? If you had recurring nightmares since childhood? If you wanted to improve your marriage?
*February 9, 2012*

**trig**

if diameter of the circle is 100 cm. and length of the arc forming the angle is 360 cm. Assume that the earth is a perfect sphere of diameter 8000 miles. Find the distance between: Rome, Italy: latitude 42 degrees north Copenhagen, Denmark: latitude 54.3 degrees north
*February 8, 2012*

**Geometry**

What is the measures of the angles of a triangle that are in the extended ratio 2:2:8. What is the measure of the smallest angle?
*February 8, 2012*

**poetry**

what is the genre of the poem: tonight i can write by pablo neruda?
*February 6, 2012*

**English**

faith that he will one day be affirmed by white America. ???
*February 6, 2012*

**English**

The speaker in “I, Too, Sing America” survives adversity because he feels faith that he will one day be affirmed by white America. he has uncovered the hypocrisy around him. he is better than the people who are oppressing him. hope that he can one day run away from ...
*February 6, 2012*

**English**

F. Scott Fitzgerald dropped out of college to ..... begin writing. get married. join the army. work for his father.
*February 5, 2012*

**chemistry**

A 40-year old man, at a prominent legal firm experiences abdominal pain post lunch. He takes several trips to the restroom, but continues to experience pain and cramps. He decides to go to the doctor and admits he consumed 2 bottles of beer @ lunch. The alcohol content (...
*February 5, 2012*

**English**

Why don’t the narrator and the other man want to hold Edward for ransom? Is their motivation internal or external? in " Why, You Reckon?"
*February 4, 2012*

**calculus**

Solve for x: 2x=ex+1
*February 2, 2012*

**calculus**

Put the function P=40(39)t in the form P0e^kt. When written in this form, you have: k= ? P0= ?
*January 31, 2012*

**calculus**

I don't know if I'm typing it in wrong into my graphing calculator but I need to estimate the limits of sin(8 theta) / theta
*January 31, 2012*

**biochemistry **

If you make up a solution of 100 mL of 0.1 M HEPES in the basic form, what will be the pH? I have no idea where to even start...
*January 30, 2012*

**psy/300**

What are the positive aspects of peer groups during adolescence? Which of Erikson's stages describes the psychological issues of adolescence.
*January 28, 2012*

**chemistry**

thank you
*January 26, 2012*

**chemistry**

Freshman in clooege decides to try her hand at pickling olives. According to the recipe, she needs to add 3 tsps. of salt to 1 cup diced olives. She erroneously adds 6 tsps instead. Each tsp weighs about 5g and contains 2300 mg of sodium. Determine the amount of sodium added ...
*January 26, 2012*

**Physics**

On a safari, a team of naturalists sets out toward a research station located 7.0 km away in a direction 42° north of east. After traveling in a straight line for 3.1 km, they stop and discover that they have been traveling 20° north of east, because their guide ...
*January 23, 2012*

**calculus**

Thanks Steve, I didn't know how to use this function on the calculator.
*January 23, 2012*

**calculus**

calculate y = log_10(x) where x = 0.3
*January 23, 2012*

**chemistry**

Thanks, That's it!
*January 23, 2012*

**chemistry**

that is very true. What I was asking involves something like this as an example: 30mg/kg*1000g / 1kg* 1g /1000mg 30-/kg* 1000-/1-* 1g/1000- 30 * 1000/1000 * 1g = 30g
*January 23, 2012*

**chemistry**

Tell me what you think: I wrote #kg = 297mg / 3.5 mg/kg the mg's would eliminate each other and you are left with 297 / 3.5 kg = 85 kg.
*January 23, 2012*

**chemistry**

The physician has prescribed a medication of 3.5 mg/kg of body weight. If you give 297 mg of medication what is body weight of patient in kg? Is there a converstion formula?
*January 23, 2012*

**Chemistry**

I'm sorry, let me re ask this question and tell you what I've come up with ( I work 11pm-7am and do not sleep in daylight hours) Given 30mg/kg and need grams per dose with dosage every twelve hours. Here's what I've attempted: need to change mg/kg to grams --&...
*January 20, 2012*

**Chemistry**

The question just gives me the dosage of 30 m/kg for every twelve hours and asks what the dosage would be in grams.
*January 20, 2012*

**Chemistry**

I need the equation for determining how to decide : You are given a dosage of 30m/kg to be given every twelve hours, how much is given (in grams) with each dose. I know the answer is obviously 15 m/kg but what is it in grams?
*January 20, 2012*

**algebra**

amanda weighs 3/4 as much as er ister. if amanda weighs 129 how musch does her sister weigh? how do you write the equation with x being the sisters weight.
*January 19, 2012*

**Math**

The vertices of an isosceles triangle are A(3, 6), B(7, 2), and C(4, 3). What is the equation of the triangle's line of symmetry? y= x+1 y= x-1 y= x y = -x+1
*January 18, 2012*

**math**

a rectangular swimming pool is 15 yds x 25 yds. the bottom of the pool needs to be repainted. if it costs $4.25 per square foot to paint the pool, give the cost to repaint the bottom of the pool.
*January 17, 2012*

**Statistics-Confidence Interval**

Can someone please help me on how to work this out?? I'm so super confused. Thanks! A professor at Kaplan University claims that the average age of all Kaplan students is 36 years old. Use a 95% confidence interval to test the professor's claim. Is the professor's ...
*January 16, 2012*

**Chemistry**

What is the net ionic equation for this reaction? 2MnO4 (aq) + 5H2C2O4 (aq) + 6H(aq)----->10CO2 (g) + 2Mn(aq) + 8H2O(l)
*January 16, 2012*

**statistics**

Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
*January 15, 2012*

**precalculus**

thank you my precalculus is now done - chemistry is next- can't wait!!
*January 15, 2012*

**precalculus**

given functions f,g, and h find f o g o h state exact domain. show work f(x)=1/x g(x)=lnx h(x)=2x+15
*January 15, 2012*

**precalculus**

these are hard to do - thank you
*January 15, 2012*

**precalculus**

verify the functions are inverses of each other by showing that f(g(x)) =x show work. f(x)=6/1-x g(x)= 1- 6/x
*January 15, 2012*

**precalculus**

I'm going to do this on my own, but I would like to check mine against yours - give me today to work on it and I will be able to compare. List all possible rational zeros for the polynomial find all real zeros and factor completely. show work f(x)=3x^4-29x^3+89x^2-75x-36 ...
*January 15, 2012*

**precalculus**

x/4x+1 < 5x/6 solve the inequality answer in interval notation and show work - thanks
*January 15, 2012*

**precalculus**

Thanks Reiny - you have rescued me again
*January 15, 2012*

**precalculus**

solve logarithmic equation in exact form only. show work. log_5(x-3)+ log_5(x-6)-log_5(x+1)=2
*January 15, 2012*

**precalculus**

thanks again
*January 15, 2012*

**precalculus**

solve exponential equation. express in exact form. e^x-42e^-x= -19
*January 15, 2012*

**precalculus**

solve the inequality please x^4-6561>0 So far I have come up with x^4>9^4. I guess what's throwing me is the answer has to be in interval notation and for the life of me, I can't remember what that is! (for me, it used to be a blond moment - now I'm gray with...
*January 14, 2012*

**precalculus**

find the inverse of function f(x)=4-2ln(x+1). state domain, range and any asymptotes of both
*January 14, 2012*

**precalculus**

Reiny: Thanks for the websites - they have helped immensely.
*January 14, 2012*

**precalculus**

given the following rational function f(x)= x^2+5x-7 / x-4 state domain, find vertical, horizontal and oblique asymptotes if any. I found the domain to be (-inf.,4)U(4, inf.) and vertical asymptote at x=4 am I right? can someone help me with the rest?
*January 14, 2012*

**precalculus**

Thanks, Steve - I cn never get my graphs right - I get all the work, but to draw?! forget it.
*January 13, 2012*

**precalculus**

sorry-operating on no sleep for at least 24 hours! f(x)=(x+3)(x-1)^2 analyze x and y intercepts; end behavior and maximum number of turning points.
*January 13, 2012*

**precalculus**

analyze the graph of f(x)=(x+3)x-1)^2 x and y itercepts; end behavior; and maximum number of turning points
*January 13, 2012*

**precalculus**

have to graph the following piecewise function stating values for f(0) and f(-2) {-x-2 if x<=-1 f(x)={3 if -1<x<=1 {2x+5 if x>=2
*January 13, 2012*

**precalculus**

drwls, I should have told you that I do the work myself and with your answers, I confirm what I've done or prove I know nothing--Thanks for your time.
*January 13, 2012*

**precalculus**

another one where I need points to graph please. f(x)=(7/5)^(3-x).
*January 13, 2012*