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May 22, 2015

Search: Calculus - not sure if my work is correct?

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Calculus: need clarification to where the #'s go
When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^{1.4}=C where C is a constant. Suppose that at a certain instant the volume is 330 cubic centimeters and the pressure is 79 kPa and is decreasing at a ...
October 27, 2014 by Alessandra

math
one task takes 7 mins second task takes 12 min third task takes 21 nin how long dids the 3 tasks take, as a fraction of a hour 7/30+12/30+21/30=40/30 =1 1/3 hr is that right? no 2/3 Prinness is correct. There are 60 minutes (not 30) in an hour. So -- your answer would be 40/60...
March 2, 2007 by patti help

MATH - PLEASE HELP!
Need help with combining like terms How do I figure this out... 11+5t^2+t+6t If anyone can help I would really appreciate it. I helped BELOW!!!LOL See the answer below which I posted as a correction to the answer provided by Margie and Dr Phil. The correct answer to this post ...
November 2, 2006 by lily

inb but math
How many dollars you have to spend to acquire the amount of yen required? (Base your answer on the scenario, should include a numerical answer) I need to convert 100,000 yen into dollars at the rate of $1= .009035 yen so I came up with 903.5 dollars is this correct?
October 30, 2008 by Christi

math
Simplify as indicated. State at least one property of multiplication or division that would prove your simplification process correct. a. –(n + 4), to eliminate the parentheses b. 6(-s), to eliminate the parentheses c. 8(24 – n), to eliminate the parentheses Calculate the ...
February 21, 2011 by makenzie

math
Simplify as indicated. State at least one property of multiplication or division that would prove your simplification process correct. a. –(n + 4), to eliminate the parentheses b. 6(-s), to eliminate the parentheses c. 8(24 – n), to eliminate the parentheses Calculate the ...
February 21, 2011 by makenzie

Stats
Classify the following as discrete or continuous random variables. (A) The time it takes to run a marathon (B) The number of fractions between 1 and 2 (C) A pair of dice is rolled, and the sum to appear on the dice is recorded (D) The length of a broad jump I got: (A) ...
October 24, 2011 by Jennifer

English
I am having trouble writing a topical outline and expanding it to a sentence for this paper: Marie Curie is best known as the discoverer of the radioactive elements polonium and radium, and is the first person to earn the honor of two Nobel prizes. Her work not only influenced...
May 3, 2009 by Erin

chemistry
Are these formulas correct? pH + pOH = 14 pH = -log[H+] pOH = -log[OH-] [OH-] = 10^-pOH pH = 10^-pH
April 7, 2008 by Sarah

math
Find the given percent of each number.Show your work. a.25% of 120 b.80% of 120 c.120% of 80 d.70% of 150 e.150% of 200 f.200% of 150
October 7, 2009 by ..........

physics
A string is hanging from the rearview mirror of you car and a ball is at the end of this string. Suppose that you drive around a circular track at fixed speed. Which list below gives all the forces that act on the ball? A) tension and the force of gravity b) tension force of ...
November 23, 2009 by julia

economics
How can I determine if two goods are in the same market or market segment? I am not sure how to determine if they have the same demand curve. For example I need to determine if a movie rented from Redbox is or is not in the same market as a movie seen at a Movie Theater. I ...
May 18, 2012 by DM

Jimmie
I am nearly done with my Red Badge of Courage Analysis, but I would prefer one more thought from someone other than me. If you have read the work, could you tell me what you think Crane felt about soldiers as individuals? I think he thought they were ignorant people fighting ...
October 6, 2007 by Laura

Math: Present Value
Please help me with the following problem. I'm not able to get the right answer! Please provide a full solution that I can follow... thank you. How much money should be invested now at 7% to obtain $9,000 in 5 years if interest is compounded: a) Quarterly b) Continuously...
January 11, 2009 by Anonymous

Business English
Selecting concrete words 22. we have found that young men are best for this work. 23. She makes good grades 24. John lost a fortune in Las Vegas. 25. if we don't receive the goods soon we will cancel. 26.some years ago she made good money 27. His grades on the aptitude test ...
October 18, 2011 by efi

Chemistry
I am a parent trying to help with my childs homework. This is the question that has us stuck. Can you assist us? Boron trioxide B203 , reacts with waterto produce boric acid, B(OH)3. B2O3(s) + 3H2o (l) -> 2B(OH)3(s) Ricardo adds 27.2 g of B2O3 to an excess of h2O, and the ...
November 4, 2014 by Gina

American Lit => Ms.Sue (Poetry analysis help)
Poem "for rosa parks" And how was this soft-voiced woman to know that this was "No" in answer to the command to rise would signal the begining of the time of walking Soft the word like the closing of some aweful book, a too-long story with no pauses for reason, but yes, and ...
March 23, 2008 by ~christina~

Chemistry
Hi, I am totally confused with this chemistry because none of this stuff is in my book, so I come to the great ones with my question: 1. Can you show me how to convert celsius to farenheit (please show me an example and your work so I can get it please) 2. farenheit to kelvin...
September 24, 2006 by Confused considerable

Algebra
Solve the system 9x-5y=119 18x-10y=238 Double both sides of the first equation and you have 18x-10y =238 which is the same as the second equation. Since the two equations are not independent, there are no unique solutions. Thee are an infinite number of pairs of x and y that ...
December 14, 2006 by Tabby

ethics
Whatever your personal feelings about the justice and appropriateness of particular laws, all board members, staff, and volunteers are to obey all laws in the performance of their work on behalf of Community Services.” Why do you think this item is necessary? What does it tell...
November 29, 2007 by Anonymous

History
I figured out that "We Can Work it Out/Day Tripper" were the first two music videos, they were released as the same single. I am having trouble finding a way to watch this original music video. I could not find any on Youtube besides a montage of photos with the two songs. ...
March 27, 2009 by Cassie

geometry
How are the radii of 2 two concentric circles related to the distance between them? I tried making an equation using their cirmcumferences but I was way off. All I did was subtract the inner circle's circumference from the outer circle's circumference and set it equal to the ...
October 11, 2009 by Jessi

math
Mr mcmurry takes 4327 sips of mountain Dew each day each time he takes a drink he moves the bottle 45cm to his mouth and another 45cm back to the table if the bottle has a mass of 567grams (5.1Newtins ) how much work does Mrmurry do during the day? How do you write this ...
October 25, 2009 by Barbara

language could you please check my work
true(t) or false (f) 1)f reading is not a real hobby 2)f an activity that is done outdoors is not a hobby 3)t photography is a popular hobby 4)t building a cabnint can be part of a hobby 5)f cooking is never considered recreation 6)t model building is very educational 7)f ...
April 14, 2010 by marina

statistics
. A statistician needs to survey a sample of 50 people that is representative of voters in his community. He prepared a list of phone numbers of 50 randomly selected, expected voters. Next morning, he came to work at 8:00 and began to make calls. By 11:00 a.m., his survey was ...
August 25, 2010 by sylvia

physics
Two point charges are located as shown in the figure, with charge q1 = +3.2 C at x = − 3.0 m, y = 0, and charge q2 = +2.5 C at x = +1.0 m, y = +2.0 m. An electron is now taken from a point very far away and placed at the origin. How much work must be done on the electron...
October 2, 2010 by melody

Physics
1. It takes 190 kJ of work to accelerate a car from 21.0 m/s to 29.0 m/s. What is the car's mass? 2. A 32-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 205 J from 435 J. How high ...
March 15, 2011 by Leo

physics
Two point sources produce waves of the same wavelength and are completely out of phase (that is produces a crest at the same time as the other produces a trough). At a point midway between the sources, would you expect to find a node or an antinode? Why? Please show work, ...
May 2, 2011 by silly

Science
I need some answers for my science essay... We have a research report and I cannot find these answers ANYWHERE. The sport I chose for the assignment was Quidditch (awesome, right?) and I cannot find work for a bludger, quaffle, golden snitch, or players. I need at least two ...
May 26, 2011 by Rain

business
As the new finacial controller of a meduim-sized manufacturing company, you quickly need to assess the company's finanical position. Explain the process you would work through and the documents you would review. also state which of you new colleagues you would speak with and ...
June 3, 2011 by Antonio

science207
Many ecologists and resource scientists work for government agencies to study resources and resource management. Do these scientists serve the public best if they try to do pure science, or if they try to support the political positions of democratically elected ...
June 26, 2011 by tamika

stats
A statistician needs to survey a sample of 50 people that is representative of voters in his community. He prepared a list of phone numbers of 50 randomly selected, expected voters. Next morning, he came to work at 8:00 and began to make calls. By 11:00 a.m., his survey was ...
August 23, 2011 by Anonymous

statistics
A job in an insurance office involves telephone conversations with policyholders. The office manager estimates that about half of the employee’s time is spent on the telephone. How many observations are needed in a work sampling study to estimate that time percentage to within...
September 29, 2011 by rodrigo

CHEMISTRY AP
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32-mg mosquito moving at a speed of 1.61 m/s if the speed is known to within ± 0.01 m/s I used the principle and got 2.48e-29 its wrong..and since its a fly i thought it ...
October 23, 2011 by Karina

physics
Two wires run from the top of a pole 2.6 tall that supports a volleyball net. The two wires are anchored to the ground 2.0 apart, and each is 2.0 from the pole. The tension in each wire is 100. I do not understand how to setup work. if could show I would get better ...
March 17, 2013 by rob

Math
How many solutions does the system of equations have? 3x=-12y+15 and x + 4y=5 Y=6x+2 and 3y-18x=12 x-2y=6 and 3x – 6y =18 y-5x=-6 and 3y-15x=-12 Ok, so I’m having problems with these, so if Steve or Reiny could help with these problems and show the work for them that would ...
January 13, 2014 by Gabby

History
Britain’s Factory Act of 1833: A. reduced the number of women working in factories. B. reduced the number of children working in factories. C. established an eight hour work day for all workers. D. placed a high tariff on imports in order to increase the profits of ...
September 29, 2014 by Angela

Business
A new business has been launched with four employees who work for the entrepreneur-owner. As the owner contemplates growth in sales and personnel, she realizes that the next step of growth will involve the special problem of? A.intermediate supervision B.formal policies C....
November 16, 2014 by kim

physics
The figure above shows a chain being held on a table with one quarter of its length hanging over the edge. Friction is negligible. The chain has length L = 24 cm and mass m = 0.012 kg. Calculate how much work is required to pull the hanging section back onto the table.
April 25, 2015 by john

calculus
1) A ladder 25 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of 2 feet per second. Find the rate at which the are of the triangle is changing when the base of the ladder is 7 feet from the wall. --- I did the ...
November 5, 2007 by Anonymous

pre calculus
Question 1: Explain why the equation of the line y=5 has a slope that is undefined. Explain in words or mathematically. Question 2: Given any circle, the coordinates of one endpoint of a diameter is (3,-2). If the coordinates of the center are (2,-4), find the coordinates for ...
May 14, 2009 by maxine

Calculus
1a. 15 ft ladder is placed against a vertical wall. the bottom of the ladder is sliding away from the wall at a rate of 2 ft/sec. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 9 ft from the wall? 1b. Using the data in the first part, ...
February 28, 2013 by Trevor

Calculus
An object is traveling along the x axis so that its speed is given by v(t)=t^2-7t+10 m/s. (a) Find the times when the object is at rest. (b) Find the acceleration at both of these times. Interpret the acceleration in terms of the motion of the object, ie whether the object is ...
May 14, 2013 by Elliott

English
Which one of the following sentences contains an incorrect usage of the singular possessive? A. Icarus's fate was sealed when he approached the sun. B. Mary was dominant among Jesus' disciples. C. The alpha male is often the pack's leader. D. The north forty has always been my...
November 9, 2013 by Cassie

english
can you please tell me if i'm correct or not? write A if the sentence is active or P if it is passive. 1. max and his uncle towed the car to a downtown garage. P 2. lightning hit our house during last night's storm. P 3. the opening remarks were made by the president of the ...
March 31, 2015 by d

calculus
Given a right circular cone, you put an upside-down cone inside it so that its vertex is at the center of the base of the larger cone, and its base is parallel to the base of the larger cone. If you choose the upside-down cone to have the largest possible volume, what fraction...
January 21, 2012 by Mari

Physics
How much energy is needed to melt 0.225 kg of lead so that it can be used to make a lead sinker for fishing? The sample has an initial temperature of 27.3 degrees celsius and is poured in the mold immediately after it has melted. Not sure if this is relevant to finding the ...
March 30, 2010 by Kim

Physics
How much energy is needed to melt 0.225 kg of lead so that it can be used to make a lead sinker for fishing? The sample has an initial temperature of 27.3 degrees celsius and is poured in the mold immediately after it has melted. Not sure if this is relevant to finding the ...
March 30, 2010 by Kim

Caluclus
Find the absolute maximum and absolute minimum of f on the interval (-1,2]: f(x)=(-x^3+x^2+3x+1)/(x+1) A. Maximum: (1, -2); Minimum: (-1, 2) B. Maximum: (1, -2); Minimum: None C. Maximum: None; Minimum: None D. Maximum: None; Minimum: (-1, 2) E. None of these I got to my ...
January 11, 2015 by Anonymous

Science
If an object with a density of 0.8 g/cc is placed in pure water is it correct that 80% of the object will be below the water line and 20% of the object will be above the water line?
December 13, 2012 by Jerry

Calculus
An object is traveling along the x axis so that its speed is given by v(t)=t^2-7t+10 m/s. (a) Find the times when the object is at rest. (b) Find the acceleration at both of these times. Interpret the acceleration in terms of the motion of the object, ie whether the object is ...
May 15, 2013 by Mike

spanish help
Ser or Estar use correct form 1. Yo estoy de Claifronia 2. Nosotros estamos estudiant de VP 3. Tu y tus amigos eres simpaticicos e inteligentes 4. Hoy yo _____ un poco nerviosa por la prueba. 5. Ayer es Domingo 6. Ella no _____estadoundidenses. ____ingeles 7. Las Chica eres ...
January 9, 2009 by sam

english
can you tell me if this sentence is correct with grammar and capital letters. Thank you. I think that its right Graduated Magna Cum Laude from high school, Dare Role Model Award, Three Scholastic Achievement Awards, Congressional Student Leadership Award, Two Creative ...
March 24, 2009 by Molly

Psychology/270
Okay I will try this again, I was wondering if this assignment looks correct. It is just asking to fill in the blanks, so I will just put what I came up with. This is already here I have to match the Psychologist and the treatment to scenario Willard has been rewarded for his ...
May 13, 2009 by Sassy

childcare
You are trying to plan an activity for your third graders, who will be arriving around 2:30 in the afternoon. Today you want to do something associated with mathematics. Which one of the following activities would be appropriate? A keeping track of the weather B making a pris ...
December 16, 2009 by Abbie

childcare
You are trying to plan an activity for your third graders, who will be arriving around 2:30 in the afternoon. Today you want to do something associated with mathematics. Which one of the following activities would be appropriate? A keeping track of the weather B making a ...
December 16, 2009 by Abbie

Biology help :(
Place the following process in the correct order. a) urine is stored in the bladder. b) blood enters the afferent arteriole. c) fluids pass from the glomerulus into Bowman's capsule. d) urine is excreted by the urethra. e) sodium ions, glucose and amino acids are actively ...
January 17, 2011 by Brianna

english
Could you let me know if these are correct? Write 5 sentences in which you address changes in your writing: 1) Working with a friend has made my sentence structure better. 2) I now recognize run-one sentences,and try not to use them. 3)I still get confused on some things. 4) ...
June 29, 2011 by glenna

English
Many events take place on the island but everyone feels guilty and sorry for their actions in the end and they head back to Italy, Milan safely all thanks to Prospero's spirit, Ariel. Ariel is a spirit who used to be a slave of Sycorax, an evil witch. (Would you check the ...
November 29, 2013 by rfvv

calc
I have asked a couple questions about surface integrals but I was not able to fully understand what the person who answered was saying and/or their answer was not correct. If someone could please help me with this problem that would be great! evaluate the surface integral ...
December 2, 2014 by rebecca

French
Bonjour! Are the following examples les adjectifs de nationalite? 1. en + pays feminin --> Exemple: en Chine 2. au + pay masculin --> Exemple: au Canada 3. aux -> aux Etats-Unis (Used for territories/provinces/states if I am correct...) 4. a + ville --> a Paris (...
January 16, 2015 by Lucina

Chemistry Confusion!
1 mol of an ideal gas expands under isothermal conditions (T=298.15K). The initial pressure and volume is 2.00 atm and 1.00L respectively, and the final pressure is 1.00 atm. Find the expansion work. The answer is  w =  -101.325 J. I am unsure how to get this answer. Can ...
November 15, 2008 by Derek

Urgent Chemistry!!
1 mol of an ideal gas expands under isothermal conditions (T=298.15K). The initial pressure and volume is 2.00 atm and 1.00L respectively, and the final pressure is 1.00 atm. Find the expansion work. The answer is w = -101.325 J. I am unsure how to get this answer. Can someone...
November 16, 2008 by Derek

Physics
What is the gas pressure inside the box shown in the figure? I have a picture but website wouldn't allow me to post the link for the picture. So I am trying my best to describe it. it is a u-shape tube and it is holding mercury in it. One side has 16cm of mercury and other ...
November 15, 2009 by ana

College Algebra
Cleaning sidewalks. Edgar can blow the leaves off the sidewalks around the capitol building in 2 hours using a gasoline-powered blower. Ellen can do the same job in 8 hours using a broom. How long would it take them working together? If someone can show me how to work this ...
August 11, 2010 by Misty

Chemistry
One of the lines in the spectrum of a mercury vapor lamp has a wave length of 254nm. What is the energy, in kj/mol, of this electro magnetic radiation. The work I have done: (6.626 x 10^-34 x 3.0 x 10^8) all divided by (254 x 10^-9.) The answer I calculated is 7.82 x 10^-19. ...
July 11, 2010 by Casey

physics
a 2500 kg car accelerates from rest under the act of two forces. 1.) a forward force of 1400 N between the wheels and the road. 2.) 1140 resistive force due to various frictional forces. Use the work-kinetic theorem to determine how far the car must travel for its speed to ...
November 29, 2010 by mikaela

Physics
A bungee jumper of mass 60 kg jumps from a bridge tied to an elastic rope which becomes taut after he falls 10 m. Consider the jumper when he has fallen another 10 m and is travelling at 15 m/s. Work out how much energy is stored in the rope. Take g=10 m/s^2 and ignore air ...
December 17, 2010 by anon

LEARNING SKILLS
Suppose you're just beginning to study the information in your third shipment of material. When can you expect the next shipment to be sent? A. When you submit a certain number of examinations in your current shipment B. When you call DIAL-A-QUESTION® and request it C. In ...
January 27, 2011 by Anonymous

physics
i have noo idea how to do this, please hellppppp A 15.6 kg block is dragged over a rough, hor- izontal surface by a constant force of 72.2 N acting at an angle of angle 34.8 above the horizontal. The block is displaced 24.6 m and the coefficient of kinetic friction is 0.234. ...
February 25, 2011 by ally

finance
Use the capital-asset pricing model to predict the returns next year of the following stocks, if you expect the return to holding stocks to be 12 percent on average, and the interest rate on three-month T-bills will be two percent. Calculate a stock with a beta of -0.3, 0.7, ...
April 28, 2011 by ky

physics
An initially stationary 15.0-kg crate of cheese wheels is pulled via a cable a distance d= 5.70m up a frictionless ramp to a height of h= 2.50m, where it stops. What is the potential energy of the crate after it is lifted? How much work is done during the lift? If it takes 10 ...
June 30, 2011 by rosie

social psychology
Is this one the few ways to obtain self-efficacy? I also feel that self efficacy can occur in oneself as well as others from charity or volunteer work and spiritual activities such as attending temple or church and reading religious texts. Yoga, meditation, and Pilates also ...
August 22, 2011 by Sharon

Algebra
During a hurricane evacuation from the east coast of Georgia, a family traveled 260 miles west. For part of the trip, they averaged 70 mph, but as the congestion got bad, they had to slow to 20 mph. If the total time of travel was 9 hours, how many miles did they travel at the...
October 9, 2011 by Leslie

psychology
In order to study the schools of children from poor families, Jonathan Kozol moved to several different U.S. cities and taught in their poorest schools. After doing this for a few years, he wrote a book about his findings. Kozol's work is an example of a/an __________ study. A...
September 27, 2012 by paul

physics
A steam engine’s boiler completely converts 151 kg of water to steam. This process in- volves the transfer of 4.8786 J J as heat. If steam escaping through a safety valve does 1.66 × 108 J of work expanding against the outside atmosphere, what is the net change in the internal...
February 19, 2013 by scott

physics
A hand-driven tire pump has a 2.50 cm diameter piston and a maximum stroke of 31.0 cm. (a) How much work (J) do you do in one stroke if the average gauge pressure is 2.40 multiplied by 105 N/m2 (about 35 psi)? (You may consider this an isothermal process.) (b) What average ...
July 24, 2013 by Eric

Teacherd aide
3.   Which of the following techniques to arouse curiosity would work best with junior high students? A. Set up a curiosity corner. B. Use a "feelie" box. C. Use a teaser to introduce the topic. D. Set up a discovery learning center. I believe it is letter D, but I'm not ...
October 20, 2014 by Sam

Science Question
Richard has to move a 45.5kg couch in order to vacuum behind it. He is able to push against it with a force of 85.3N. He does unfortunately have to work against friction, but thankfully the coefficient of friction is very small 0.082 since it is on pads and a hard wood floor. ...
November 4, 2014 by Dave

U.S. History
A drawback to using the "collegial" approach to manage the White House staff is that it: 1.forces staffers to compete against each other or 2. can produce "groupthink" by encouraging staffers to find common ground. isn't the correct answer 2? Thanks for your help! I would ...
January 23, 2007 by Alisha

English writing
1. Don't get stuck on yourself. * What is the meaning of 'stuck on'? 2. He applied/wore a heavy makeup. * Which word should I use, apply or wore? 3. Speak in full clear sentence. * Is this one OK? Don't we have to add 'a' before'full'? 4. Don't spin in your chair or let your ...
October 24, 2007 by John

Chem II Oxidation Reduction
Sb+1 + HClO ------> Sb2O5 + Cl-1 I'm not doing something right. I think I have the charges correct, this is what I have so far . . . . 2Sb^+1 -----> Sb^+5 + 4e- 2(2e- + Cl^+1 ------> Cl^-1 then when I start subbing everything back and start trying to balance ...
July 26, 2008 by Ken

writing
Can you help me correct these sentences? 1.She wants to become an environmental scientist she is especially interested in marine life. 2.If she can get a scholarship she would like to spend her senior year in New Zealand. 3.The Great Coral Reef almost cicles New Zealand it has...
February 23, 2010 by ruby

Government US
The United States has two court systems, state and federal. The federal system a. has discretionary jurisdiction over all cases arising in the state system. c. is the only one based on the constitutional doctrine of the separation of powers. e. None of these answers is ...
September 11, 2011 by HM

math scientifi notation
i need to write the each number in scientifi notation. the brain contatins about 100 trillion nerve connections i wrote: 1 x 10^11 power the volume of the water behind the grand coulee dam is aobut 10.6 million cubic yards i wrote: 1.06 x 10^2 power are these correct?
November 30, 2011 by marko

Chemistry(Please answer)
How many chirality centers does the compound 1,3-dibromo-2,4-dichloro-5-fluorocyclopentane have? This compound has three different elements, a Br which is repeated twice, a cl which is also repeatd twice, and a fluorine. I was thinking that the number of centers would be 3 ...
October 18, 2012 by Hannah

chemistry
1)What is the correct structure of AsH3???? 2)Name the type of hybrid orbitals of central form. 3) Name the molecular geometry of compound. 4)State weather it is polar or non polar. 5) Estimate H-As-h bond angle in degree. 6) what is the dominant form of secondary bonding for ...
June 1, 2013 by Anonyms

CHEMISTRY
Method for getting correct answer for this? Thank you! A mixture containing an initial concentration of 0.1877 M for H2 and 0.1432 M for Cl2 is allowed to come to equilibrium (see reaction below). What must be the equilibrium concentration of HCl? H2(g) + Cl2(g) ↔ 2HCl(g...
April 6, 2014 by Chemistry

statistics
The correct size of a nickel is 21.21 millimeters. Based on that, the data can be summarized into the following table: Too Small Too Large Total Low Income 19 21 40 High Income 22 13 35 Total 41 34 75 Q: If 100 children are chosen at random, it would be unusual if more ...
August 19, 2014 by JR

Physics
A cube of mass m1 = 6.8 kg is sitting on top of another cube of the same size and mass m2 = 0.7 kg while they are both in free-fall. Ignoring any air resistance, what is the magnitude of the normal force with which the bottom cube is acting on the top cube? I've tried ...
February 23, 2015 by anon

geometry
I did problem but would like someone to see if I did it correctly. triangle ABC similar to ADE by AA theorem need x and y. start at B and go rt. around the 2 connected triangles BA=12; (AD 8 with rest of line =y so have ADC = 8+y; CD = 9. Line DE = x. <D = 90 deg. So have ...
April 19, 2015 by robin

Chemistry
The molar heat of reaction, H rxn , for the reaction of Ca(s) + 2H+(aq)-> Ca2+(aq) + H2(g) was found to be -550kJ/mol The change Hrxn , for the reaction of CaO(s) + 2H+(aq)-> Ca2+(aq) + H2O(l) was found to be -189kJ/mol Based on these results if the formation of water is...
February 21, 2009 by Anonymous

Catcher And The Rye Project Question
Hi, I have a question for my project on catcher and the rye. It includes me putting 5 songs on it and relating it to the book. But I'm not sure what songs to use, the songs have to be related to the book: Catcher and The Rye by JD Saligner. Can someone help me out? Thanks!
March 2, 2012 by Allyson

chem+ help!
When 80.0 grams of a certain metal at 90.0 °C was mixed with 100.0 grams of water at 30.0 °C, the final equilibrium temperature of the mixture was 36.0 °C. What is the specific heat (J/g°C) of the metal? I suppose I would use this formula: q= mcÄt m= mass(g) q= enthalpy change...
January 23, 2007 by bon

math
You inherit $18750 but the conditions are that for teh first year, the money must be invested in two stocks paying 10% and 11% interest, respectively. How much should be inbested at each rate if teh total interest to be earned for teh year at $1962.51? Be sure to specify what ...
February 6, 2007 by Christine

English
Which of the following is the best version of a thesis statement about charter schools? a. A charter school is a tax supported established by a charter between a school board and outside group of teachers or parents. b.A charter school operates without local and state ...
November 4, 2014 by Michelle

Physics
A 75kg firefighter slides down a 2.5m fire pole from rest. It takes the firefighter 1.8s to reach the ground. If the firefighter bends his knees when he reaches the ground such that his centre of mass mives 41cm while coming to a stop, what must the normal force of the ground ...
March 11, 2015 by Anonymous

Physics
A 75kg firefighter slides down a 2.5m fire pole from rest. It takes the firefighter 1.8s to reach the ground. If the firefighter bends his knees when he reaches the ground such that his centre of mass mives 41cm while coming to a stop, what must the normal force of the ground ...
March 11, 2015 by Anonymous

Physics
A 75kg firefighter slides down a 2.5m fire pole from rest. It takes the firefighter 1.8s to reach the ground. If the firefighter bends his knees when he reaches the ground such that his centre of mass mives 41cm while coming to a stop, what must the normal force of the ground ...
March 11, 2015 by Anonymous

5th grade math
My class is selling flowers. We want to arrange them so that they are all in equal rows with no row containing different types of plants. Using the numbers from the table provided, what is the largest # of plants we can put in each row? (Marigolds-48 pots, Pansies-24 pots, ...
May 14, 2010 by Josh

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