Tuesday
March 31, 2015

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

Number of results: 59,892

math
Good day to you. How can I approach this math problem. "To save for a child's education, the Petersens deposited $2500 into an account that pays 6% annual interest compounded daily. Find the amount of interest earned on this account over a 20-year period". I try solving with ...
October 23, 2011 by Cliff

algebra
Use the following to answer the next three questions: the height, h, of a ball t seconds after it is released for a jump shot in a basketball game can be modeled with the equation h = −16t2 + 12t + 8. The rim of the basket is 10 feet high. Which of the following is the ...
March 5, 2012 by alyssa

algebra
Use the following to answer the next three questions: the height, h, of a ball t seconds after it is released for a jump shot in a basketball game can be modeled with the equation h = −16t2 + 12t + 8. The rim of the basket is 10 feet high. Which of the following is the ...
March 5, 2012 by alyssa

Ethnics
I am a little confused on how to research the following: • Select 1 racial group from the list below: o African American o Asian American o Arab American o Hispanic American/Latino o White/Caucasian •Write a 250- to 350-word summary of the economic, social, and political ...
March 30, 2012 by Bella

Logic
People have claimed that Jamie’s paintings have given them the blues. Clearly this cannot be entirely correct, since many of Jamie’s paintings contain no blue at all. The argument above is flawed because the author (Points : 1) provides no evidence misinterprets a key term ...
June 5, 2012 by Anonymous

History
Economic experts use certain measures, such as GNP and GDP to divide the world into two groups—developed nations and developing nations. Which is not a characteristic of a developing nation? low income attempting to improve the lives of its citizens high literacy rate <...
May 20, 2014 by J

math
You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes randomly, what is the probability that exactly three letters will go into the correct envelopes? 1/2 1/3 1/4 0 Explain your answer.
October 26, 2010 by M.A.

math
You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes randomly, what is the probability that exactly three letters will go into the correct envelopes? 1/2 1/3 1/4 0 Explain your answer.
October 27, 2010 by M.A.

Math
Can you help me check if I'm doing this correctly or not? I'm solving this quadratic equation by us ing the quadratic equation. -9v^2+35v-30=1-v -9v^2+36v-29=0 -36 ± √36^2-4(-9)(29) divided by 2(-9) -35 ± √1296 + 1044 divided by -18 -36 ± √2340 divided by -18...
November 14, 2011 by Lilly

Young Harris College
How much energy is needed to heat 8.50 g of ice from -30.0 C to 70.0 C? The heat of fusion of water is 6.01 kJ/mol, and the molar heat capacity is 36.6 J/(mol.K) for ice and 75.3 J/(mol.K) for liquid water. I got 19.24kJ but it isn't correct!!
September 7, 2014 by Jhon

algebra
The length of a shadow of a building is 50 ft. Also, tan P = 0.8. 1.Write an equation involving a trigonometric ratio that can be used to find the height x of the building. Explain why your equation is correct. 2.Find the height x of the building by using your equation.
December 29, 2014 by Sara Mohsin

French (URGENT #2)
Can someone please help check my work? There were no instructions, it is as I have written it. Am I supposed to choose only one? or more? 1. On peut pratiquer les sports décrits dans cette annonce... info: SPORTS. Cercle. Nautique. Martinique. Ski nautique - Planche à voille...
May 25, 2009 by Larry

Chemistry
A solution of I2 was standardized with ascorbic acid. Using a 0.1000-g sample of pure ascorbic acid (C6H8C6), 25.32 ml of I2 were required to reach the starch end point. What is the molarity of the iodine solution? Please check to see if I did this right: (0.1000g Ascorbic ...
April 26, 2008 by Ramey

English
Can you please help me complete the fill-in-the-blank activity, please? I'm not sure if the rules in America are the same as in England. 1)You can get a part-time job when you are 15 years old. You can ride a 50cc moped when you are 14 years old. You can't leave school until ...
March 17, 2011 by Mike

chemistry
Insert a complete data table, including appropriate significant figures and units, in the space below. Also include any observations you made over the course of Part I. Aluminum Measured Mass of Metal 41.66 g Distilled Water Measurement 25 mL Distilled Water Temperature 25 C ...
July 7, 2014 by kim

Socials-Ms. Sue
To: Napoleon Bonaparte From: Sara, Senior Advisor Subject: Continental System 1. Advantage for Britain: None Disadvantages for Britain: Loses money because of trade embargo from Europe *will not be able to trade with other countries *Won't be in debt anymore Can you please ...
November 8, 2009 by Sara

HCA 240
I need to know if my diagnoses of the following symptoms are correct for the I start my research: Past several weeks that he is having more bruises, or ecchymosis, all over his body. After coughing this morning, he noticed tiny red marks all around his eyes. I believe the ...
January 23, 2010 by Online Bus

Statistics
Let x be the elevation (in thousands of feet) for an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. Suppose that the following data were obtained for a collection...
June 14, 2010 by John

Statistics
Let x be the elevation (in thousands of feet) for an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. Suppose that the following data were obtained for a collection...
June 14, 2010 by John

english
please correct any grammetical errors/tense errors and explain in order to improve my writing. Sara came to Hyderabad airport by flight. Then, she reached Begumpet by auto where she is received by john and escorted her up to the Greenvalley Apartment. After some time,John ...
May 5, 2011 by Ramesh Reddy

math
mr. pursley, have you ever worked geo., trig. etcwith no calu.s with the heat on , when it had to be right?wheather you blew up your target or something else or the bld. collapsed or was built in the correct place? i'm not an answer grazer, but qam an answer seeker.I'm trying ...
July 22, 2011 by mac

Help please!!health
After a meal at a child care center ,the left over hot food that has been in serving bowls that have been on the table should be: a.chilled, refrigerated and used at another meal b.reheated, cooled and frozen for later use c.discarded d.heated in a microwave oven before using ...
December 13, 2012 by JoJo

calculus
Boat A leaves the dock at 12pm heading due South at a constant speed of 20 km/h. Meanwhile, at 12pm Boat B, a pirate ship, is 15 km due West of the dock where boat A started, and is sailing due East at a constant speed of 15 km/h. If the pirates get within 10 km of another ...
November 10, 2010 by Anya

Pre-Calculus
A window has the shape of a square surmounted by an isosceles triangle. The sides of the square are length x. The The perimeter of the window is 90 inches. Thus, the perimeter of the triangle is x+2y. So, 90 inches = 3x+2y. (a) Write an equation for the area of the window in ...
January 23, 2011 by SpencerCH

Math
I still do not understand Today was my first day learning how to add 3 sets of fractions with different denominators and I did not get it. I need help with the following please. 1/8 + 1/2 + 3/4 = Waht is the LCM? Answer 8. So convert all the other denominators to eights. 1/8...
March 21, 2007 by Andre

English
What is the theme of West Side Story? A. The prejudice is evil. B. All is fair in love and war C. Any friends you have are okay D. Get revenge for everything E. None of the above I think C and D are just wrong and B is not true at all. I would say it's A as it was the ...
July 3, 2010 by Priscilla

Physics
A bullet with a mass of 55 grams moving with a speed of 100 m/s slams into and wedges in a 1.9 kilogram block of wood supported by a string initially at rest. Which one, conservation of energy or conservation of momentum, can be applied to this situation? Why? I think it's ...
October 14, 2010 by Fred

Chemistry
Vinegar is a dilute solution of acetic acid. In the titration of 5.00 mL of vinegar, 39.75 mL of 0.137 M sodium hydroxide solution was required to neutralize the vinegar to a phenolphthalein end point. Calculate each of the following of the vinegar. (a) the molarity : I got 1....
April 3, 2011 by Mark

math
A ball is thrown vertically upward with an initial velocity of 5 ft/sec from a height of 20 feet. Which function models its motion? i literally am lost and have no idea how to this problem. if i could have help with the steps on how to do the problem and to get the correct ...
November 21, 2014 by Natalie

Inttroduction To Business
1. Regarding management and leadership, which statement is most accurate? A. Leaders can be good managers, and good managers can be leaders. B. Leaders aren’t managers, and managers aren’t leaders. C. Leadership and management are entirely unrelated. D. Most effective managers...
April 19, 2012 by Sherri Mcgovern

calculus
Could someone check my reasoning? thanx Find the derivative of the function. sin(sin[sinx]) I need to use the chain rule to solve. So I take the derivative sin(sin[sinx) first. Then multiply that by the inside which is the derivative of sin[sinx]. And multiply that by ...
May 7, 2009 by XCS

Calculus
The population of a region is growing exponentially. There were 40 million people in 1980 (when t=0) and 50 million people in 1990. Find an exponential model for the population (in millions of people) at any time t, in years after 1980. P(t)= Predicted population in the year ...
October 6, 2009 by Z32

Calculus
A rectangular box with square base (which is NOT necessarily a cube) and NO top is to be made to contain 9 cubic feet. The material for the base costs $2 per square foot and the material for the sides $3 per square foot. Find the dimensions that minimize the cost of the box ...
March 24, 2013 by Marto

College Essay
Is any one can help me to revise my college application? Thank you. Question: Please describe which of these activities ( extracurricular or personal activities or work experience) has had the most meaning for you, and why. I was used to be a President of class in high school...
January 8, 2007 by Kate

English
Could someone read my five sentence paragraph. Before I turn it in. Thank u. To prepare to host a party or an event. The first thing I would figure out the date and location. Then I would sat down and figure out a menu,the guest list,entertainment. I would also seek input and ...
February 22, 2015 by Rebecca

Calculus
A baseball team plays in a stadium that holds 53,000 spectators. With ticket prices at $10, the average attendance had been 49,000. When ticket prices were lowered to $8, the average attendance rose to 51,000. (a) Find the demand function (price p as a function of attendance x...
July 15, 2012 by Anonymous

accounting
Excel document (2-3 pages) Details: Incorporate an ESO plan into a company's valuation. The c9mpany is Starbucks For your company (the company you used for the first two Units), incorporate the effect of the Employee Stock Option (ESO) plan into the common equity valuation. Be...
December 7, 2009 by jaquez

English
All of the following common nouns except a.emotion b.leader. c.tablet. d.Kindle. I am think D. Singular or plural nouns a.refer to whether a noun is singular or plural. b.can usually be changed in number by adding or deleting -s or-es. c.sometimes use the same form or both ...
November 18, 2014 by Anonymous

Chemistry
Help needed with a calorimeter lab. I have to measure the enthalpy of a neutralization reaction between NaOH and HCl as well as find the concentration of NaOH the following ways. - using the mass and volume of NaOH - Using calorimetric data assuming no heat lost to calorimeter...
November 17, 2014 by Bibi

english
write a paragraph of 5-7 sentences to explain how to study for a test. Include at least one single word adjective, one single word adverb, two adjective prepositional phrases and two adverb prepositional phrases. Make sure you identify the adjective, adverb, and the phrases.
April 10, 2012 by meme

Calculus
Find the particular solution of the differential equation particular solution of the differential equation dy/dx=(x−7)e^(−2y).
November 15, 2013 by Robin

paragraphs
Sorry Sorry Second Paragraph This is about my cousin that is looking for a job and her previous jobs were cashier and sale clerk. I know she is a perfect match for the job that is opening where i work for a boss's assistant and i have to persuade my cousing to apply for the ...
July 15, 2009 by lynn

physics
which of the following MUST necessarily happen if work is done: a. energy must be released b. energy must be used c. energy must be converted from one form to another d. it is not necessary that any of these Must happen
October 11, 2010 by pricilla

chemistry
Lead metal is added to 0.100M Cr3+(aq) Pb(s) + 2Cr3+(aq) -> Pb2+(aq) + Cr2+(aq) What is [Pb3+] when equilibrium is reached? What is [Cr2+] when equilibrium is reached? What is [Cr3+] when equilibrium is reached? i solved it buh for sum reason am not getting d correct answer...
February 9, 2009 by help!!!

Math
Margarit liked to balance things. She balanced 3 pencil sharpeners and 2 one-gram blocks with a 100 gram weight and another one-gram block. She let x stand for the weight of one pencil sharpener and she claimed that x=30 grams. Was she correct?
September 10, 2012 by Anaiya

History
Europeans were drawn in to sub-Saharan Africa in their quest for? a. gold and diamonds. b. diamonds and slaves. c. gold and slaves. d. slaves only. I can't find the correct answer. Please help! I believed it was gold and slave but it is not an option.... or is it c?? what is ...
December 14, 2013 by J

Business
True or false: If a manager has control over their subordinates they are using delegation? I think that is false because I would think that is a manager controls their subordinates they are using authority, am I correct?
November 3, 2007 by Jen

french
student A: Est-ce que tu aller ètudier le Français aujourd'hui? student B: Oui, je vais ètudier le Français aujourd'hui. please correct me if I'm wrong, thanks
September 24, 2009 by Anna

MATH213
A student wants to know how many integers between 1 and 1000 are a multiple of 4 or a multiple of 5. She wonders if it is correct to find the number of those integers that are multiples of 4 and add the number of those that are multiples of 5. How do you respond?
January 26, 2010 by Rebecca

Physics
A silver wire and a platinum wire of the same length have the same resistance. What is the ratio of the diameter of the silver wire to that of the platinum wire. I did 10.6E-8/1.59E-8 but am not getting correct answer?
February 10, 2012 by jason

german
Fill in the correct comparative form: Surfen ist ______ Jagen. (gut) A besser als B mehr gut als C schlechter als D mehr besser als is it A?
June 24, 2012 by anon

math
In my math book I got a problem that said expain the meaning of the range I said that you need to add the greatest number and the lowest number if that is not correct what is the meaning of the range.
July 10, 2012 by Americal

Math 8R: Homework Check - Part 3
Part 3 : Evaluate when x = -2, y = 5 21. 4x + 2y, Answer: 2 22. 3(x) *to the 3rd power*, Answer: -221 23. (x + y) *to the 2nd power*, Answer: 9 24. -4x + 2y, Answer: 18 Please check to see if my answers are correct. Thank You!!! :)
October 29, 2012 by Laruen

Math
Explain It Evan told his class that the people in his family have 14 legs altogether. Quinton said that there must be 7 people in Evan's family. Is Quinton correct? Explain
February 5, 2013 by Quan

Math
By what percent is a 100-watt light bulb brighter than a 60-watt light bulb? Round to the nearest tenth. 40/60 = 2/3 = 2 ÷ 3 = 0.666667 0.666667 x 100 = 66.6667% Answer: 66.7% Is this correct?
May 13, 2013 by Ann

Math
Thanks Damon. Yes, Chris collected $450 is a given. So if Chris collected $450, he walked 25 miles, correct. I'm having a hard time calculating the miles Lacy walked.
January 23, 2014 by mackenzie

Lisa
The square of the sum of 2x and 3y is equal to the sum of the square of y and the square root of x. Which of the following represents this statement? I got: (2x + 3y)^2 = y^2 + √x But the correct answer choice is (2x + 3y)^2 = y^2 + x^2 I don't understand how, because ...
July 15, 2014 by Anne

Physics
The three vectors have magnitude a =3m, b= 4m and c=10m . On the x axis is vector a at 0 degrees then 30 degrees is vector b then 120 degrees is vector c. If vector c =p*vector a + q*vector b .What are the values of p? and q? I am expose to get -6.67 for p and then 4.33 for q...
October 6, 2006 by Jenny

English
Working at a nursing home. I have volunteered at a nursing home. There were some work to do. I talked and listened to elderly people. I also cleaned the rooms at the nursing home. I was glad because I could help elderly people. (Would you like to check the passage? Thank you.)
October 15, 2010 by rfvv

PreAp Physics
You are walking from your math class to your science class carrying a book weighing 112N. You walk 45 meters down the hall, climb 4.5 meters up the stairs and then walk another 40 meters to your science class. What is the total work performed on your books.
November 23, 2011 by Mandy

Math
Amandeep decides to grow a vegetable garden. She wants to make it 10.1m long and 4.2m wide. She is worried about rabbits eating from her garden so she builds a fence around it. The fence will be 11.2m long and 5m wide. What is the area between the fence and garden? Show your ...
January 12, 2012 by Ruby

physical chemistry
2 liters of N2 at 0 degree Celsius and 5 atm pressure are expanded isothermally against a constant pressure of 1 atm until the pressure of the gas is also 1 atm. Assuming the gas to be ideal, what are the values of work,delta E, delta H, and q for the process?
September 29, 2012 by lyn

applied physics
a gardener pushes a mower a distance of 900m in mowing a yard. the handle of the mower makes an angle of 40.0 degrees with the ground. the gardener exerts a force of 35.0 N alonf the handle of the mower. how much work does the gardener do in mowing the lawn?
April 22, 2013 by donna

phy
An engine absorbs 2000j of heat from a hot reservoir and expels 750j to a cold reservoir during each poerating cycle, (i)what is the efficiency of the engine (ii)How much work is done during the cycle? (iii)What is the power output of the engine if each cycle last for 0.5 ...
July 4, 2013 by kate

heat
a silver bar 0.125 meter long is subjected to a temperture change from 200 degree celsius to 100 degree celsius. What will be the lenght of the bar after the temperture change? I will be happy to critique your thinking and/or work on this question. Please post it.
August 27, 2005 by stacy

Maths help
Hi MY question is if a cylinder has a volume of 72cm cubed and a cross-sectional area of 18cm squared. Work out the height of the cylinder Can someone show me how we do it by the steps The cross-section of a cylinder is a circle. so pi(r)^2=18 solve for r let the height be h ...
April 23, 2007 by Ali

physics
In an experiment, a student measures the speed of sound in air to be 318 m/s at STP. If the accepted value for the speed of sound under those conditionsis 331 m/s, what is the student's percent error? a. 3.9% b. 3.93% c. 4.09% d. 4.1% I tried but it didn't work. This is wat I ...
September 11, 2007 by Christie

chemistry
i am given 2.60*10 to the 15th power short tons (which 1 short ton equals to 2000 lb) and iam suppose to convert that into metric tons in which I have that( 1 metric ton equals to 1000 kg) I need help in knowing the steps to work this problem out thanks
September 29, 2008 by rosa

Math
At work one day, Erica franz received 7 packages. Speedy delivery delivered twice as many as ralph's exoress, while ralph express delivered one more than sandquick package service. how many packages did each serivce deliver to erica
December 18, 2008 by Bryan

pre-calc
The probability, P, in percent, that a person will respond to a certain ad can be modelled by the equation P(n)=1-2^(-0.05n), where n is the number of days since the ad began on tv. After how many days is the probability greater than 20%? my work: 0.20=1-2^(-0.05n) then i ...
May 19, 2009 by Jus

algebra
Use the five steps for problem solving to answer the following question. Please show all of your work. The average of two quiz scores is 81. If one quiz score is six more than the other quiz score, what are the two quiz scores?
October 29, 2010 by franklin

math
my present salary is $1,560.00. I was offered a new position at $8.60 per hour with 1 1/2 hrs pay for overtime after 40 hours of work per weeke. How man hours of overtime per week would I need to earn the $390.00 per week.
August 21, 2012 by kim

chemistry help
1. Calculate the energy change (q) of the surroundings (water) using the enthalpy equation qwater = m × c × ΔT. We can assume that the specific heat capacity of water is 4.18 J / (g × °C) and the density of water is 1.00 g/mL. Show ALL your work. The water has absorbed ...
April 7, 2013 by MadiB PLEASE HELP :(

calculus
Find the sum of the series (-1)^n (5^(2n))/n! 1. sum = e^25 2. sum = e^−5 3. sum = 5 4. sum = e^5 5. sum = 25 6. sum = e^−25
September 30, 2010 by Bob

English
Can you pleas check if the following sentences are correct? Thank you very much for your help. 1) He has been (or is?) guilt-ridden since the death of his friend. 2) He is unable to take (make?) decisions by himself. 3)News of his suicide brought by the Bradshaws intrudes upon...
April 29, 2010 by Franco

personal finance
Cliff Swatner is single, 33, and owns a condominium in New York City worth $250,000. Cliff is an attorney and doing well financially. His income last year exceeded $90,000, and he has sufficient liquid assets to supplement his condominium and other tangible assets. Several ...
May 5, 2007 by sconi

physics
A fire hose ejects a stream of water at an angle of 37.9 ° above the horizontal. The water leaves the nozzle with a speed of 25.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the highest possible fire? i...
February 10, 2011 by frost

Physics
A 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. Find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earth’s velocity. Earth’s mass is 6.0 × 1024 kg. Show all your work, assuming the...
January 27, 2012 by Pat

Chemistry
Please show me how to work! Ethane, C2H6(g) can be made by reaction of hydrogen gas with acetylene, C2H2(g). the standard enthalpies of formation of ethane and acetylene are -84.68 and +226.73 kJ mol-1, respectively. what is the reaction enthalpy for the production of one mole...
October 20, 2012 by Sam

science
PLEASE HELP GUYS An ideal gas for which Cv = 3R/2 is the working substance of a Carnot engine. During the isothermal expansion, the volume doubles. The ratio of the final volume to the initial volume in the adiabatic expansion is 5.7. The work output of the engine is 9 x 105 J...
April 3, 2014 by juniah

math
Sally is buying 6 identical shirts. The original price for one shirt is 39.99. The store is having a "buy one get one half off" sale and Sally has a coupon for an additional 25% off. The sales tax rate is 4 3/8. What is the total cost for the items Sally purchased. Show all work.
February 10, 2015 by Kat

Math
Sally is buying 6 identical shirts. The original price for one shirt is 39.99. The store is having a "buy one get one half off" sale and Sally has a coupon for an additional 25% off. The sales tax rate is 4 3/8. What is the total cost for the items Sally purchased. Show all work
February 11, 2015 by Linda

Help!!
1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the brother’s age in five years...
December 17, 2012 by Morgan

Pre-Calculus
The formula D= 5e ^-0.4h can be used to find the number of milligrams D of a certain drug that is in a patient's bloodstream h hours after the drug has been administered. When the number of milligrams reaches 2, the drug is to be administered again. WHat is the time between ...
October 10, 2006 by Erica

Calculus
A searchlight rotates at a rate of 2 revolutions per minute. The beam hits a wall located 8 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle between the beam and the line through the ...
October 30, 2011 by Reonea

Algebra
Give the degree and classify the polynomial by the number of terms. A. degree: 2; trinomial B. degree: 3; binomial C. degree: 3; trinomial D. degree: 2; binomial Is B correct?
July 7, 2014 by Emma

Applied Mechanics
Is my work correct? Two bodies hang on a string 2.1m long. The two bodies have a mass of 3.75kg and 2.4kg respectively. If the 3.75kg mass is raised to a height of 0.545m and released, and if upon impact the mass adhere. Mass1 = 3.75 kg Mass2 = 2.4 kg String length = 2.1 m M1 ...
March 20, 2009 by Henri

SQL
Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not use scalar subqueries...
July 22, 2011 by joe

math
I need help with slopes and lines. Determine the slope of each line a line through points (-1, 2) and (2, -7) Slope of a line through two points (x1, y1) and (x2, y2) is (y2 - y1)/(x2 - x1). So substituting the given points we have (-7 - 2)/(2 - (-1)) i.e -9/3 = 3 Oops. it ...
April 18, 2007 by Tammy

physics
A 2.0kg block is sitting on a 15 degree incline. The coefficient of friction is 0.22. What is the minimum force needed to cause the block to accelerate UP the slope? The force applied has to be slightly greater than the force of friction (mu(mgCosTheta)) plus the component of ...
September 13, 2006 by mclanee

US government
someone please give me some conservative point about taxes. Taxes discourage work and discourage private investment. Taxes assume the government knows best how to spend your money. With tax revenue in hand, governments will spend it, regardless of whether the program is ...
October 23, 2006 by mike

Physics
I'm stumped on what formula to use for the following question. A 1.5V battery does 4.5*10^2 J of work in 120s. Calculate the current through the battery Calculate the number of elementary charges that pass through the battery. I've been trying to figure out the formula to ...
August 26, 2009 by Kate

College Physics
The only force acting on a 3.9 kg body as it moves along the positive x axis has an x component Fx = - 6x N, where x is in meters. The velocity of the body at x = 3.0 m is 8.0 m/s. (a) What is the velocity of the body at x = 4.0 m? (b) At what positive value of x will the body...
October 25, 2009 by Jeff

Chemistry [Science]
Oh gosh... I need help, with like everything... [Show all work] Aluminum nitrite & ammonium chloride react to form aluminum chloride, nitrogen gas and water. What amount of aluminum chloride is present after 43g of ammonium chloride have reacted completely? I
May 3, 2010 by Nikki

physics
A 60 kg skier with an initial speed of 12 m/s coasts up a 2.5 m high rise that makes a 35 degree angle with the horizontal. If the coefficient of friction between the skis and the snow is .08, find the speed of the skier when he reaches the top of the rise. How much work does ...
October 9, 2010 by Me

Physics
A mine shaft is known to be 57.8 m deep. If you would drop a rock down the shaft, how long would it take for you to hear the sound of the rock hitting the bottom of the shaft knowing that sound travels at a constant velocity of 345 m/s? The answer is 3.60s, but I need to work ...
October 11, 2010 by Alina

physics
A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (muk = 0.43). What is its final speed? (m/s) Thanks for suggeting the following solution. The block starts with an initial speed of 18.0 m/s.Does it have any effect? Final KE = PE loss...
November 28, 2010 by sandhu

thermodynamic
Energy is added to a piston-cylinder arrangement. The piston is withdrawn in such a way that the temperature remains constant. The initial pressure and volume are 200 KPa and 2m^3, respectively. If the final pressure is 100 KPa, determine the work done by the ideal gas on the ...
January 9, 2011 by chris

AP European History
How did Medieval Europe lay the groundwork for the re-birth of Europe (Renaissance)? What conditions existed that allowed Europe to evolve out of medieval conditions? I don't even know where to start, other than that I know that monarchs began to solidify their authority. What...
February 11, 2011 by Christina

physics
A harmonic wave is traveling along a rope. The oscillator that generates the wave completes 40.0 vibrations in 30.0 s. A given crest of the wave travels 425 cm along the rope in a period of 10.0 s.What is the wavelength? Show all of your work plz. i know the answer is 0.319 m ...
May 11, 2011 by Anonymous

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