Sunday
September 25, 2016

Posts by Patrick

Total # Posts: 716

Physics
The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m. 2) What is the wavelength of the wave? 3)What is the frequency of the wave?
November 23, 2010

Chemistry
During the combustion of 5.00 g of octane, C8H18, 239.5 kcal is released. a) What is the sign of (delta)H for this reaction? b) How much energy is released by the combustion of 1.00 mol of C8H18
November 15, 2010

physical chemistry
For the process CH4(g) = C(s) + 2H2(g) A reaction is started in a rigid vessel at 1000 K with 1 mole of methane and 1 mole of hydrogen gas at 10 bar. Use table C.3 from your text to determine how many grams of carbon should be formed after the reaction has reached equilibrium.
November 12, 2010

calculus
Find the derivative of y=t^2(5t-8)^4.
October 19, 2010

math
Calculate the lower quartile (QL) in the following data set: (8, 6, 13, 8, 3, 15, 12, 5).
October 15, 2010

Chemistry
Ok I will try Kelvin. Thank you
September 26, 2010

Chemistry
I attempted using the Clausius-Clapeyron Equation and I am not getting anywhere
September 26, 2010

Chemistry
The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1 degrees Celsius and 100.0 torr at -6.3 degrees Celsius. What is delta Hvap of chloroform?
September 26, 2010

Statistics
Is the water on your airline flight safe to drink? It is not feasible to analyze the water on every flight, so sampling is necessary. In August and September 2004 the EPA found bacterial contamination in water samples from the lavatories and gallery water taps on 20 of 158 ...
September 19, 2010

chemistry
d,Atomic mass= fraction of the isotope X mass of the isotope.
September 6, 2010

Statistics
Calculate each binomial probability: a. Fewer than 4 successes in 12 trials with a 10 percent chance of success. b. At least 3 successes in 7 trials with a 40 percent chance of success. c. At most 9 successes in 14 trials with a 60 percent chance of success. d. More than 10 ...
August 29, 2010

college
Many organizational situations involve an audience that consists of a group of people. Which is an approach to analyzing this type of audience?
August 10, 2010

chemistry
Tums is added to 30.0 of 0.400m of HCL , how many grams of CO2gas are produced?
July 20, 2010

Physics
a ball is thrown vertically upward from the ground with the velocity of 30m/s. a) how long will it take to rise to its highest poitn? b) how high does the ball rise? c) how long after projection will the ball have a velocity of 10m/s? d) what is the total time of flight?
July 19, 2010

Physics
U=0,t=T,
June 8, 2010

math
square root 4y=10
June 1, 2010

Vector
2. Determine the Cartesian equation of the plane passing through the point P(2, -1,2) and containing the line r = (2, -1, 4) + f(0, 3, -5).
June 1, 2010

Bikini Bottom
huh? you are? What am I then?
June 1, 2010

math
How can fishermen save gas?
May 31, 2010

Vector
The points U(4,-1,2), V(-1,-1,-1) and W(-4,2,4) dermine a triangle in R^3 a) Determine the parametric equations for thr three lines containing the 3 sides of the triangle
May 31, 2010

psychology
all of the following are true of gestalt therapy except
May 2, 2010

Politics iran
Thank you and enjoy your trip :). I read your post about it.
April 27, 2010

Politics iran
Is this correct? The political values of Iran are influened by shari'a law? In other words Islamic law?
April 27, 2010

History (social oppression)
I'm having trouble understanding what social oppression is. Can it be applied to poor hating on other poors?
April 26, 2010

hmm...?
A clinic is a place where clients or patients receive diagnosis and treatment. So, a clinical psychiatrist is a psychiatrist involved in diagnosis and treatment of people with psychological challenges. Compare this to the theoretical psychologist and professor of psychology, ...
February 23, 2010

math
The unit rate for the first one is 98 yd/sec. 30 ounces for $3.48 is S8.62/oz. It is the best buy.
February 11, 2010

math
Which can be simplified to 13:4.
February 11, 2010

math
5/4*61/8 =305/32 =9.53125
February 11, 2010

Computers
Thanks, that was imformative.
February 11, 2010

Computers
This may seem irrelevant, but why is this site so oddly named?
February 11, 2010

4th grade math
9 miles long.
February 11, 2010

programming
java, write a program that prints out the letter X composed of asterisks (*) reply soon
February 4, 2010

math
How would I round the number 226,542,203 to the nearest million
January 12, 2010

chemistry
im confused about ionic substances. can someone give me a example of ionic substances?
December 9, 2009

chemistry
can someone explain a diatomic molecule, monatomic gas and what would happen if a metal atom bond with a nonmetal atom?
November 23, 2009

Algebra
Why is television called a communications medium?
November 8, 2009

social studies
do you know any websites that have any primary sources dealing with the roman empire, such as religion, war and conflict, culture, etc?
November 1, 2009

Calc
Thank you!
October 26, 2009

Calc
For y sec(x) = 3x tan(y), the direction above it says "Regard y as the independent variable and x as the dependent variable and use implicit differentiation to find dx/dy." I do now know if that makes any different and I believe I have 4 lives left. For the x3 + y3= ...
October 26, 2009

Calc
Thank you! For y sec(x) = 3x tan(y) I got dy/dx = (3 tan(y) - y tan(x)sec(x)) / (sec(x) - 3x sec²(y)) but it was still incorrect... I have no idea how to do y = arctan[(sqrt((1 + x)/(1 - x)))] because i never did this type of problem before, help please. here is another ...
October 26, 2009

Calc
Thank for replying =D. Unfortunately, I have been using implicit differentiation and I do not fully understand the logarithm. I am still getting an incorrect answer. Please show me an example on how to solve these problems. Thank you.
October 26, 2009

Calc
Can anyone help me find the derivative of these functions? y = x^2x y = x^-cos(x) y = ln(7x^2 + 5y^2) sqrt(3x+y)=2+x^2y^2 ysec(x) = 3xtan(y) y = arctan[(sqrt((1 + x)/(1 - x)))]
October 26, 2009

elementary
It must be an elementary question because I too have the same question on my homework. I was thinking the shape they are looking for is a trapezoid but still having problems getting to the .95 out of .30, 1.25 and 1.00
October 22, 2009

sociology
Conflict Perspective
October 12, 2009

english 7th grade
whatever memory you choose, how were you felling at exactly that time, right then and a stanza is like the seperate paragraphs in a poem like when it skips a couple lines those seperate paragraphs are stanzas hope i could help=)
October 6, 2009

social studies
christopher columbus was looking for a way to india and accidentily found america instead
October 6, 2009

Math
scientific notation
October 6, 2009

8th grade
ok my teacher just assigned me this wikid stupid worksheet with a riddle whom do you see at the bank if you need to borrow money?
October 6, 2009

math
14
October 6, 2009

biology
haha=)
October 6, 2009

biology
thanks for the math answer now that i think about it its kind of obvious but thanks =)
October 6, 2009

BIOLOGY
Heat exhaustion caused by a person's exposure to heat can result in weakness or collapse. It usually involves a decrease in blood pressure. Explain why the homeostasis adjustment to heat can cause a drop in blood pressure. ---------- I'm not sure if I'm correct. ...
September 30, 2009

math
Name the ordered pair if the x-intercept is -2.
September 29, 2009

Calculus
Is it 4 or 1?
September 29, 2009

Calculus
cos4x^2 + sin4x^2?
September 29, 2009

(math) geometry
i have to find the next two terms for a pattern of H,He,LI,Be. I am confused any help?
September 16, 2009

Advanced Math
A set of 750 values has a normal distribution with a mean of 12.5 and a standard deviation of 0.36. A. What percent of the data is between 12.25 and 12.75? ANSWER: 51.6% B. Find the interval about the mean within wich 45% of the data lie. ANSWER: 12.28-12.72 C. Find the ...
August 11, 2009

English IV
The effect urban life has on the woman in the poem "Preludes" by T.S. Elliot is she: A. has become sophisticated. B. has developed wisdom. C. is depressed. D. is sordid and "dirty" like the city. I think it may be either B or C. 1 - The tone of the poem &...
July 19, 2009

Maths
Worked out combination of women and men Either 3 women and 3 men or 4 men and 2 women Then comination for the 2 Women was n = 4 no. of combos was 6 and r = 2 and for the 3 women n = 4 and r = 3 no. of combos was 4 Follow the formula n!/(n-r)! x (r!) Same process for men. In ...
July 15, 2009

Literature
In the poem "The Lady of Shalott," what does the web she weaves symbolize? A. Anger. B. Pain. C. Reality. D. A curse. I'm stuck between C and D?
July 15, 2009

Literature
1 - In Ulysses by Alfred, Lord Tennyson, Ulysses is unhappy because: a - he's idle. b - the war has started. c - he has to leave his son. d - he's no longer leader of his country. Are these correct? MY ANSWER: A 2 - What crisis does Ulysses face? a - war. b - losing ...
July 15, 2009

Advanced Math
Yes, I had a typo sorry. It was. (2x^2+3)(x-1) Is it 19 now?
June 15, 2009

Advanced Math
1. The distance s(t) between an object and its starting point is given by the anti derivitive of the velocity function v(t). find the distance between the object and its starting point after 15 sec if v(t)=0.2t^2+2t+10 meters/seconds. MY ANSWER: 600 meters. 2.Find the slope of...
June 15, 2009

Advanced Math
The probability of getting 2 heads and 1 tail when three coins are tossed is 3 in 8. Find the odds of not getting 2 heads and 1 tail. ANSWER: 5:8? Three Coins are tossed. Find the probability that exactly 2 coins show heads if the first coin shows heads.? ANSWERS: Could it be ...
June 10, 2009

Government
Suppose you want to take a scientific poll about people’s opinion on a new boating law for Lake Blue. Who should make up your universe—all the people in the United States, only townspeople, only boat owners, only people who live on the lake, anyone who uses Lake Blue...
May 12, 2009

Physics
The horizontal motion of a horizontally launched projectile affects its vertical motion. (FALSE) A missile launches at a velocity of 30.0 m/s at an angle of 30.0* to the normal. What is the maximum height the missile attains? (11.5 m, I'm not very sure) In calculating the ...
May 6, 2009

Pre Calc.
Use the sum or difference identity to find the exact value of sin255 degrees. My answer: (-sqrt(2)- sqrt(6)) / (4) Find the value of tan (alpha-beta), if cos alpha= -3/5, sin beta= 5/13, 90<alpha<180, and 90<beta<180. My answer: -33/56 Which expression is ...
April 22, 2009

math
can i get a link containing a list of the theorems and postulates of a 2 column geometry proof?
April 12, 2009

math
In a coordinate plane, what is the total number of points 5 unita from the origin and equidistant from both the x and y axes? 1)1 2)2 3)3 4)4
April 11, 2009

Pre cal.
Determine the linear velocity of a point rotating at 25 revolutions per minute at a distance of 2 feet from the center of the rotating object. Give answer in feet/sec/ 25/60 = 5/12 revs per second Convert rev per second to rad/sec 5/12*2*pi = 2.618 rad/sec at a distance of 2 ...
April 1, 2009

Pre Cal.
Given that x is an integer between -2 and 2, state the relation represented by the equation y = 2-abs(x) by listing a set of ordered pairs. Then state whether the relation is a function. I think it's: (-2,0) (-1,1) (0,2) (1,1) (2,0)
April 1, 2009

Physics - Waves
So the answer is 400(345.8/340.8) = 405.87 Hz?
February 1, 2009

Physics - Waves
So the answer to the first question is 394.3 Hz and the answer to the second question is 400 Hz?
February 1, 2009

Physics - Waves
My thinking is: f2=f1(V/V+Vs) f2=Heard frequency=394.3 Hz f1=Source frequency=400Hz V=velocity of sound in medium=332+0.6(23)=345.8 m/s Vs=velocity of source=5 m/s I'm not sure about the second question, though.
February 1, 2009

Physics - Waves
A speaker which produces a frequency of 400 Hz is moving away from an observer and towards a wall at 5 m/s when it is 23 degrees Celsius. What is the frequency of the sound that travels back to the observer? What is the frequency of the sound that travels forward and bounces ...
February 1, 2009

Algebra
I think I have the correct equation, but can someone please double check and tell me if I am correct. Scenario: Suppose that the width of a rectangle is 5 inches shorter than the length, and that the perimeter of the rectangle is 50. Question: Set up an equation for the ...
January 3, 2009

math
Louise is 8 years old now
October 29, 2008

AP U.S History "American Pageant" Series
I congratulate you for your confidence that although you do not already understand the material in this course, you eventually will learn much more through the process of TRYING to learn and understand. You WILL learn more by trying to learn more, and that's what education...
October 18, 2008

english composition
Watching horror movies is a way of feeding our inner insanity and bave our nightmares.
October 11, 2008

music-buddy holly
i`m doing a school projrct about buddy holly ive looked in the site drwls suggested but i can`t find much info or many pictures . any ideas thanks
September 22, 2008

chemistry
how do you do the conversion?
August 23, 2008

chemistry
convert 5.98 x 10 to the 24th kg. to mg.
August 23, 2008

Geometry
Next 2 in the pattern M,V,E,M,...
August 14, 2008

Finance
The Victoria Nursery, which provides facilities for pre-school children on a commercial basis, is preparing its cash budget for next year. A profile of the estimated revenues and expenses for the first four months of the year is as follows: Jan Feb Mar Apr £ £ &...
March 21, 2008

Analysis & Design
How can a project manager be sure that he or she has chosen the correct metrics to assess project performance? I need a few examples please.
February 29, 2008

Algebra
How can you determine if two lines are perpendicular?
February 27, 2008

math
Write equation of line given 2 points (1,4) (8,-10)
December 12, 2007

algebra
When thrown into the air from the top of a 50 ft building, a ball’s height, S, at time t can be found by S(t) = -16t^2 + 32t + 50. When t = 1, s = -16(1)^2 + 32(1) + 50 = 66. This implies that after 1 second, the height of the ball is 66 feet. When t = 2, s = -16(2)^2 + ...
November 23, 2007

Business
I wasn't asking for it to be done for me i just wanted someone to explain it to me. So I could get a better understanding of the subject
November 23, 2007

Business
Explain the methods governments use to promote and restrict international trade.
November 23, 2007

algebra
this is what I came up with for my monitor is this right or did I do it wrong. a^2 + b^2 = c^2 13*2+10*2 = c^2 26+20= c^2 46=c^2 46=√(c^2) 6.78= c
November 22, 2007

algebra
ok thank you know if you could break it down to me where i can do it own my owe that would be great. because, i do not know how to do algebra at all.and i'm taking a college corse it which i have to pass.
November 22, 2007

algebra
figuring out if my monitor is 13inch by 10 half inch. how do i put that into what i'm ask to do?
November 22, 2007

algebra
In your post, include the height, the width, and the calculations needed to determine the length of the diagonal of your computer monitor. After you have calculated the approximate length using the Pythagorean theorem, use a measuring device to measure the length of the ...
November 22, 2007

algebra
the height of your computer monitor to the nearest tenth of a centimeter or sixteenth of an inch. Measure the width of your monitor as well. Use the Pythagorean theorem to find the length of the diagonal of your monitor. In your post, include the height, the width, and the ...
November 22, 2007

algebra
A tennis club offers two payment options: Option1: $35 monthly fee plus $4/hour for court rental Option 2: No monthly fee but $6.50/hour for court rental. Let x = hours per month of court rental time. a) Write a mathematical model representing the total monthly cost, C, in ...
November 21, 2007

Romeo and Juliet
i need to no how romeo and juliets parents reacted to there deaths? asap
November 5, 2007

Economics
Suppose that a small open economy begins to use credit cards, starting from monetary equilibrium, allowing households to hold more of their wealth in interest bearing assets. Discuss the effect on real and nominal money supply, foreign-exchange reserves given: A) Fixed ...
November 3, 2007

math
Bill is 2 years older than ted (1) b = t + 2 where b = bill's age TODAY and t = ted's age TODAY In 5 years 5 times ted's age will be 4 times bill's age: (2) 5(t+5) = 4(b+5) Put equation (1) into (2) for b. 5(t+5) = 4(t+2+5) ==> 5t+25 = 4t+28 solve for t to ...
October 10, 2007

Math repost for Justin
draw the lines like this \// /X/ //\ one diagonally down from left to right and the other 3 from right to left connecting all rows possible.
October 10, 2007

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