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August 29, 2015

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

Number of results: 61,849

chem please help!
Krypton gas is four times denser than neon gas at the same temperature and pressure. Which gas is predicted to effuse faster? i got neon which is correct but How much faster? how many times? i dont know how to get htis
January 8, 2013 by Samantha

Albebra 2
Are these correct? a1=(-3x1)2 +4=13 a2=(-3x2)2+4-40 a3=(-3x3)2+4=85 a4=(-3x4)2+4=148 a5=(-3x4)2+4=229 a6=(-3x4)2+4=328 The first six terms of the sequence are 13, 40, 85, 148, 229, 328 I keep coming up with these answers but there is suppose to be an error somewhere.
February 18, 2013 by Lea

Math (Ms.Sue)
Marco ran from his house 2.67 miles to a county park. He then ran the 1.5 mile cross country loop at the park and back home. How many miles did Marco run altogether? I added and got 4.17 miles Is that correct
October 14, 2014 by Amy

Sixth Grade Math
A car driving cross-country traveled 180 miles in 4 hours. At this rate of speed, how many miles further will the car travel in the next 3 hours? My answer is 135 miles. Is my answer correct?
November 30, 2014 by Stephon

statistics
In a certain lottery, five different numbers between 1 and 31 inclusive are drawn. These are the winning numbers. To win the lottery, a person must select the correct 5 numbers in the same exact order in which they were drawn. What is the probability of winning?
March 16, 2015 by Greg

Health
1. Which of the following secondary sex characteristics do not develop during teen years? A. development of breasts in girls B. development of body hair in boys C. development of ovaries in girls testes in boys*** D. development of acne in boys Is C. correct?
August 17, 2015 by Amber

physics
1.How does a lightning rod work? What is the purpose of a lightning rod? 2.How does an electrically polarized object differ from an electrically charged object?
January 24, 2011 by beauty

math
At a manufacturing company, 80% of the employees work on the assembly line. If there are 720 assembly-line workers, how many workers are there in the entire company?
January 25, 2011 by Anonymous

Find the Bounds on the real zeros
Find the bounds on the real zeros of the following function. Please show all of your work. f(x)= x^4 + 5x^3 + 6x^2 - 4.
May 29, 2011 by Armando

Math - Write expression as single logarithm
Write the expression below as a single logarithm. Please show all of your work. ln((x^2 – 1)/(x^2 – 6x + 8)) – ln((x+1)/(x+2))
June 6, 2011 by CheezyReezy

math
Jeremy can type 144 words in 144 min. How many words can he type in 10 min at the same rate. Show work
December 30, 2011 by kevin

computer science
You work for a company that requires you to compute the average temperature for 8 A.M. to 6 P.PM. each day. You are to computer program to compute the average temperature.
February 2, 2012 by jamal

Math (Linear Systems)
28 N + T2 sin 12 = T1 sin 42 T2 cos 12 = T1 cos 42 T2 sin 12 + T3 sin 54 = W2 T2 cos 12 = T3 cos 54 Im solving for T1,2,3 and W2 I just cant seem to get the system to work
September 29, 2012 by Joe Rogers

math
9.If 1/4 the recommended daily requirement of vitamin P is 2 ounces, what is the total recommended daily requirement of vitamin P? please show work.
July 23, 2014 by Johnny

Calculus
A tree grows 2.80 m during the first year since it was planted. During each subsequent year the tree's growth is 85% of its growth the previous year. a) Calculate to the nearest 0.001m, the growth of the tree in the fourth year. Tn = ar^n-1 T4 = 2.80(0.85)^10-1 T4 = 2450 I ...
September 21, 2011 by Anonymous

French #3
You are on vacation in Paris, describe each attraction you visited. Can someone please check my work? Boat ride on the Seine A boat ride on the Seine is an absolute must. Many of the most beautiful monuments were built along the Seine River. The night cruises is also beautiful...
June 14, 2009 by Larry

English - Native speakers
Question: Which 2 answers are correct? Which is not and why? 1. Sorry, I can't. I'm seeing my grandmother. 2.Sorry, I can't. I'm going to see my grandmother. 3. Sorry, I can't. I'll see my grandmother.
March 4, 2012 by Mark

English
1. He is collecting waste into the dustpan with a broom. (Is this correct?) 2. He is holding a dustpan and broom. 3. He is holding a dustpan and a broom. (Which one is right? Are both OK?
May 29, 2012 by rfvv

Math
How do you solve a double sided variable? I am not sure what you are asking. Even so, since this is not my area of expertise, I searched Google under the key words "'double sided variable' math" to get this possible source: http://en.wikipedia.org/wiki/Math_24 I hope this ...
September 26, 2006 by Sammi

Contract Law
Hello, I have a question. Does Electronic Commerce Act, 2000 require companies to do business through electronic means? And it says provide statutory( which means legal) reference. I think that it doesn't require the companies to do business through electronic means, but I can...
November 16, 2009 by Yana

literature.. poetry.. plz give me corrections ASAP
1) Walt Whitman's writing style can be best described as a. bold and confident b. folsky and charming c. elegant and refined d. elevated and sublime 2)unlike whitman, emily dickinson was a. a world traveler b. private and shy c. people-oriented d. involved in social causes 3) ...
January 20, 2011 by bonnierta

Calculus
∫10 to 21,f(x)dx-∫10 to 14, f(x)dx=∫a to b,f(x). where a=?,b=?
June 20, 2013 by Anon.

calculus
\int_{4}^{13} f(x) \,dx - \int_{4}^{11} f(x) \,dx = \int_{a}^{b} f(x) \,dx where a= and b= .
March 8, 2014 by ricky

music urgent!!!!!!!!!!!!
i need help with annotating a piece of idian bollywood music is there anyone who can help me? xXx uzi xXX hi hi back can can you help me with my music course work that is left before it is complete??? xXx uzi xXx
January 18, 2007 by uzma

grade 8 math
At the annual Grade 8 ski trip, for every 2 students who skied, 3 snowboarded. Ninety-six students snowboarded. How many students skied? Show your work. Can someone help???
September 28, 2008 by Carly

English
Is "sympatheticy" a word. I want to use a word like this. My sentence is... Blah Blah's character is determined by his willingness to work, his "sympatheticy" towards his son. Sounds like a word, but I don't know if it is. Thanks :)
November 8, 2010 by CoolioMan

MATH
rowan raised $640 in a charity walk last year. This year he raised 15% more than he raised last year. How much money did rowan raise this year? SHOW YOUR WORK.PLEASE HELP ME
April 25, 2012 by Alexis

English 101
I'm not very good with English and i'm having some trouble with citations. There's a few questions I'm confused about. ____________________________ Read each of the following statements from the excerpt below and determine if the statement is “OK” in MLA format or “...
September 18, 2011 by Hans

Pscyhology help again
Hellok, my question was misunderstood, I know how to write a book report, I have to write a review on a movie with psychological issues. I chose the movie I am Sam, but my problem is do I mainly write about the mental retardation, the lawyer that has obsessive compulsive ...
September 6, 2008 by clark

chemistry
Gas A has a density that is 1.20 times that of gas B. If gas A effuses through an orifice at a rate of 3.41g/L, at what rate will gas B effuse? Hint: Ratio the molecular masses to the densities. Use this information with Graham's law of diffusion. Note that 3.41g/L is a rate...
June 19, 2009 by Capacino

Physics Capacitance
Three uncharged capacitors, X, Y, Z, each with capacitance of 12uF each are connected A---------[X]------[Y/Z]-----------B *Y&Z is parallel to each other* A potential difference of 9.0V is applied between points A and B. Explain why when the potential difference of 9.0V is ...
April 25, 2015 by Ariana

art
For this assignment, you will be required to complete a critical essay about 3 different works of art from the same period and style. Selected works of art must be chosen from the 1600s to the present (Baroque period through the Postmodern period). The goals of a critical ...
August 23, 2014 by Trine

dog behavior
please check my answer thanks :) If you're going to be teaching a dog a lot of different basic commands, what would be best to use as a treat? A. Small scoops of canned dog food B. Small pieces of rawhide C. Half of an ordinary dog biscuit D. An extra special treat the dog ...
July 26, 2008 by Maria

Differential Equations
Consider the differential equation: dy/dt=y/t^2 a) Show that the constant function y1(t)=0 is a solution. b)Show that there are infinitely many other functions that satisfy the differential equation, that agree with this solution when t<=0, but that are nonzero when t>0...
January 31, 2013 by Erica

calculus edit
1. Find the volume formed by rotating the region enclosed by x=5y and x=y^3 with y is greater than or equal to 0 about the y-axis. 2. Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis y=18x-6x^2 , y=0 : about the ...
May 4, 2007 by jimmy

Math/Calculus
Solve the initial-value problem. Am I using the wrong value for beta here, 2sqrt(2) or am I making a mistake somewhere else? Thanks. y''+4y'+6y=0, y(0)=2, y'(0)=4 r^2+4r+6=0, r=(-4 +/- sqrt(16-4(1)(6))/2 r=-2 +/- sqrt(2)*i , alpha = -2, beta = 2(sqrt(2)) y=e^-2x*(c1*cos(sqrt(2...
July 12, 2007 by COFFEE

College Algebra
Suppose a major league baseball player has hit 7 home runs in the first 16 games, and he keeps up this pace throughout the 162-game season. (a) Express the number y of home runs in terms of the number x of games played. (b) How many home runs will the player hit for the season...
October 25, 2014 by Ashton

psychics
In wandering, a grizzly bear makes a displacement of 1586 m due west, followed by a displacement of 3289 m in a direction 30.0° north of west. What are the magnitude and the direction of the displacement needed for the bear to return to its starting point? Specify the ...
January 8, 2015 by Jessie

calculus
A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give your answer in feet per...
November 14, 2010 by Ashley

Calculus
A bacteria culture contains 200 cells initially and grows at a rate proportional to its size. After half an hour the population has increased to 360 cells. (a) Find the number of bacteria after t hours. (b) Find the number of bacteria after 4 hours. I found part a, P(t)= 200e...
December 11, 2012 by toma

Grammar
In the paragraphs below, look for shifts in verb tense. In each paragraph, cross out these verb shifts and replace them so that there is verb tense consistency. Write in the correct form of the verb above what you have crossed out. 1. I watched the small children with their ...
November 11, 2010 by Leslie

calculus
The base of a solid is a circle of radius = 4 Find the exact volume of this solid if the cross sections perpendicular to a given axis are equilateral right triangles. I have the area of the triangle (1/2bh) to be equal to 2sqrt(12) (1/2 * 4 * sqrt12) I don't know what to do ...
April 22, 2007 by mark

Calculus
A rancher plans to set aside a rectangular region of one square kilometer for cattle and wishes to build a wooden fence to enclose the region. Since one side of the region will run along the road, the rancher decides to use a better quality wood for that side which costs three...
December 16, 2011 by Chris

Calculus Help
The County Roads Department is stockpiling salt for use next winter. The salt is being unloaded from railroad cars by a conveyor belt at a rate of 20 cubic feet per minute. The salt falls into a conical pile whose diameter at the base is four times the height of the pile. At ...
April 7, 2014 by Jim

John Jay
Where can I find the correct meaning of the following terms: Stereotype, Gender group, Pluraism, Sociology, Minority group, Assimilation, Conflict perspective, Segregation, Ethnic group, Racism, Class Subordinate group, Social construction of race, Racial group, and Religious ...
March 26, 2008 by Stacey

Chemistry II
Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to 50.0mL of ethyl alcohol,C2H6O(d=0.798 g/mL). Assume that the volumes are additive. From this information calculate the molarity of acetone in the ...
September 27, 2009 by Mandy

Biology
Are these correct? Cohesion=Water molecules stick to the side of a straw because of this attractive force. Adhesion=Liquid mercury forms drops because of this attractive force Polarity=This property of water enables salt to dissolve in water Base=This is a substance that ...
January 27, 2010 by mysterychicken

ECONOMICS HELP
a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than themselves isnt B the ...
October 11, 2010 by Brittany

algebra
A school designer wants to create a whiteboard with the optimal dimensions to enhance learning. It is determined that if one side of the whiteboard is x+2y inches, the other side should be x^2+6xy-5y^2 inches. Write an algebriac expression for the area of such a whiteboard, ...
February 6, 2011 by Laura

math
A school designer wants to create a whiteboard with the optimal dimensions to enhance learning. It is determined that if one side of the whiteboard is x + 5y inches, the other side should be x^2+3xy-4y^2 inches. Write an algebraic expression for the area of such a whiteboard, ...
July 17, 2011 by Mary Anna

writing skills
3. Which of the following sentences has a compound predicate? A. She raced along the path to beat him to the beach. B. She placed the shells in a plastic bag while he dried himself off. [C. She washed the shells and dried them in the sun.] D. While he swam, she collected ...
July 2, 2012 by jake

Stats.
The average age of a vehicle registered in the United States is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of a group of 48 vehicles is selected find the probability that the mean of the group’s age is between 90 and 100 months. The ...
March 18, 2013 by Christina

Financial Literacy
Terry and Sandra both found the sum of two 4-digit numbers, but their results were not the same. If Terry made an error of addition by one in the thousands column and Sandra's result was correct, what was the difference between the larger result and the smaller result? A. 1000...
May 15, 2013 by Tifini

math
Can someone explain how I missed this question. Sample has a mean of 47 and a standard deviation of 9. Find the z-score for each value of x=53.(give answer correct to 2 decimal places) I did it this way and missed it 53-47divided by 9 = 0.666 and I put 0.6 for the answer. Did ...
May 23, 2013 by Sue

Fair Division-Apportionment
I have to do a problem where : a) Find the standard division d b) Find the exact quotas for each of the republics c) Find the apportionment of seats using Hamilton's method The info is REPUBLIC: Argh Brwd Chrd Dstyr Eoia Population:7.65 4.45 8.52 9.98 6.51 For A i got 0.74 is ...
October 1, 2013 by Lynne

physics
A small sphere of mass m is connected to the end of a cord of length r and rotates in a vertical circle about a fixed point O. The tension force exerted by the cord on the sphere is denoted by T . What is the correct equation for the forces in the radial direction when the ...
December 20, 2014 by arianna

Social Studies
which of the following did NOT restrict voting rights of the African Americans after 1867? 1: Poll Tax 2: Literacy test 3: grandfather clause 4: Sharecropping I chose #4 is this correct? I was thinking grandfather clause, but they seemed to restrict, because you could vote, ...
May 7, 2015 by Marylyn

physics
A point charge with charge q1 is held stationary at the origin. A second point charge with charge moves from the point (x1,0) to the point (x2,y2). How much work is done by the electrostatic force on the moving point charge? Express your answer in joules. Use k for Coulomb's ...
January 24, 2011 by Cassie

algebra
Im having a hard time figuring out this problem: Use the function, y=-(x+1)^2 +2, to answer the following parts. Find the y-intercept y=-(0+1)^2 +2 y=-(1)^2 +2 y=-1+2 y=1 is my answer Find the x-intercept 0=-(x+1)^2 +2 0=-((x^2)+(1^2))+2 0=-x^2 - 1 + 2 sq.rt(x^2)= sq.rt(1) x=1...
May 4, 2011 by Mike

Calculus
The CN Tower is 553 m tall. A person is south of the tower, in a boat on Lake Ontario at a position that makes an angle of elevation of 100 degrees to the top of the tower. A second person is sitting on a park bench, on a bearing of 060 degrees relative to the tower, observing...
May 23, 2010 by Anonymous

math
is these answers correct? solve the equation: 2x^2 +8x - 17=(x +2)^2= x=-7,3 solve (v-5)^2-63=0, where v is a real number, simplify answer as much as possible. v=3 square root 7+5,-3 square root7+5 v``12.93725, -2.937254 use the quadratic formula to solve for x. 4x^2x-4=0 =x=1...
October 31, 2010 by lee

spanish
Question: algo mas barato que un disoc compacto Answer: unas trajetas son mas barato que un disco compacto is this correct? One left to finish thank you for your help. Our school is now closed until at least wednesday.
October 22, 2007 by sam

spanish
Question: algo mas barato que un disoc compacto Answer: unas trajetas son mas barato que un disco compacto is this correct? One left to finish thank you for your help. Our school is now closed until at least wednesday.
October 22, 2007 by sam

Bio Lab
You need to prepare medium for your culture cells. Your salt solution is 10x concentration, dilute to 1x for use. You also need to add fetal bovine serum for a final concentration of 10%. What would you add of each for the correct final concentrations in a liter of media?
November 3, 2010 by Andy

Algrebra II-please check my answer
Determine the zeros of the function 7x^2 + 9x = 0 answers were: {-9/7} {-9/7,0} {o,9/7} {9/7} I think the answer is {-9/7,0} but I'm not positive when I worked it-If this is wrong please steer me into the correct calcs because then I don't what I'm doing wrong 2.Solution to ...
January 14, 2011 by Sammy

management
please help me to correct the word of terms 1 to synthesize or put together 2 to put together or form a whole 3 this connotes many things 4 sales of stocks corporation in the stock exchange 5 trading place ans. 1 combine 2 collect 3 do not know 4 securities and stock exchange ...
March 25, 2011 by jessie

Physic
Type A nerve fibers in humans can conduct nerve impulses at speeds up to 139.8 m/s. How fast is this in mph? This is a question from my physic homework. I have tried converting 139.8 m/s to mile then to hrs and i got .000241 mph. When I input it it said this is not correct. ...
August 26, 2012 by David

Health 8R - help!
Place the letter of the correct reaction (A, B, C, D, or E) A. Speed up brain messages (Stimulants) B. Slow down brain messages (Depressants) C. Block pain messages (Narcotics) D. Scramble or confuse brain messages (Hallucinogens) E. Destroy brain cells (Inhalants) 1. Glue - E...
November 15, 2012 by Laruen

Health 8R help!!!!!!!!!!!!!!!!!!!!!!!!!
Place the letter of the correct reaction (A, B, C, D, or E) A. Speed up brain messages (Stimulants) B. Slow down brain messages (Depressants) C. Block pain messages (Narcotics) D. Scramble or confuse brain messages (Hallucinogens) E. Destroy brain cells (Inhalants) LSD...
November 15, 2012 by Laruen

First-Year Physics
Question: s22.postimg[dot]org/comasgagh/untitled.png From my calculations, option A is correct. What am I doing wrong? Also, I can't find a relationship between amplitude and energy. Attempt: s9.postimg[dot]org/8shnsrjbj/daum_equation_1366155192269.png
April 16, 2013 by Anon

English
When I went back to my home town three years ago, I found that a lot of changes ____. (A) are taken place (B) were taken place (C) have taken place (D) had taken place I answered it as B. but in the book the correct answer was D. please explain by giving examples.
August 29, 2014 by Ramesh Reddy

Algebra
The maximum velocity of a roller coaster depends on the vertical drop from the top of the highest hill to the bottom of that hill. The formula v = 8 gives the relationship between maximum velocity, v (in feet per second), and height, h (in feet). I have V=γ203-8=γ195=13.96 ...
November 2, 2014 by Babydoll07

Art Help!
How is this artistic creation an example of a combination of art and science? It is a picture of an oragomi shrimp made out of brown paper with black eyes. A. It is a creative sculpture of a shrimp. B. It is not anatomically correct. C. It is made with recycled paper. D. It ...
November 14, 2014 by Callie

calculus/finite
I am taking an online finite math class, so I dont have an instuctor to sit down with me and help me. The text book is so hard to follow. One of the problems I have having a hard time with gives an initial tableau and asks us to use the simplex method to solve each ...
December 6, 2009 by Amanda

ACC305 Accounting for Decision Making
Describe the complications that arise when LIFO or average cost is used with a perpetual inventory system. Use specific examples and references. The part that I am having trouble with is finding examples. I have the rest of the work done now I just need help with getting some ...
October 31, 2012 by Anonymous

English
I have difficulty restating my thesis in a different way in my conclusion. my thesis: Ruby's sense of responsibility becomes her weaknesses as it makes her blind to the fact that her decision to stay with a man that maltreats her is wrong. For this, she develops a habit of ...
December 19, 2012 by Ted

Science
I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30 x 10^3 kg/s with a ...
February 8, 2015 by Baxter Reus

Physics
I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30 x 10^3 kg/s with a ...
February 9, 2015 by Baxter Reus

Physics
I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30 x 10^3 kg/s with a ...
February 9, 2015 by Baxter Reus

Physics
I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30 x 10^3 kg/s with a ...
February 9, 2015 by Baxter Reus

Check my answered questions.
For the combining gas law P1V1/T1=P2V2/T2 home work assignment I did three answers on my own and would like you to check them if they are right. If for some reason the answers that I provided don't seem correct please provide me with the right answers. P1V1/T1=P2V2/T2 For ...
May 2, 2008 by Lizy

English
In paragraph 2 of Swimming Strokes by Lee Carroll, I found 1 error in subject-verb agreement, 0 errors in parallelism, and 1 error in pronoun-antecedent agreement. I was wondering were they correct because all the errors in the passage range from 0 errors to 3 errors and ...
March 22, 2011 by katelyn

math
Kahlil said that using the equation € (a + b)2 = a2 + 2ab + b2, , he can find a similar equation for € (a − b)2 . Examine his argument. If it is correct, supply any missing steps or justification; If it is incorrect point out why. € (a + b)2 = [a + (−b)]2 = a2 + 2a...
September 26, 2011 by Anonymous

Psychology
If you support the idea that physiological arousal and the experience of an associated emotion will occur simultaneously, you'll agree with the A. biological emotion-activation theory. B. James-Lange theory of emotion. C. Cannon-Bard theory of emotion. D. Schachter-Singer ...
September 30, 2012 by dandrah

culteral diversity
How does race and ethnicity in the United states help people to better understand or relate to a specific miniority group We have plenty of chances to get to know people of various ethnic groups through school, work, and neighborhood contacts. When we know people personally we...
April 19, 2007 by Jo

English
A nurse attended (a)...... her work place in time.(b)....... all her sincerity she was attending (c)....... the patient but she knew that her effort (d)........ keeping the patient alive might end (e)........ smoke.The doctors of board were shocked (f)...... the pitiable ...
November 4, 2014 by Rifa

Need help fast on calc
original curve: 2y^3+6(x^2)y-12x^2+6y=1 dy/dx=(4x-2xy)/(x^2+y^2+1) a) write an equation of each horizontal tangent line to the curve b) the line through the origin with the slope .1 is tangent to the curve at P. Find x and y of point P. -when plugging y as 2 in original, it ...
November 12, 2008 by Craig

physics
a girl pulls a wagon along a level path for a distance of 15.0 m. the handle of the wagon makes an angle of 20.0 degrees with the horizontal, the girl exerts a force of 35.0 N on the handle. Friction provides a force of 24.0 N. Find the net work done on the wagon.
October 19, 2009 by lalaglaze

chemistry(check my work)
Calculate the value of the equilibrium constant (Kp) for the reaction displayed if the following equilibrium pressure data were measured at 25.00 °C: P(H2(g)) = 0.2282 atm, P(I2(g)) = 0.1646 atm, P(HI(g)) = 5.462 atm. H2(g)+I2(g) = 2HI(g) is it like this, (5.462)^2/(0.2282x0....
April 4, 2010 by bme1

AP PHYSICS
A 2.30 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 21.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 7.00 m. Find the work done by the kinetic frictional...
November 14, 2010 by Ashley

please help me, physics
Five moles of a monatomic ideal gas expand adiabatically, and its temperature decreases from 410 to 200 K. (a) What is the work done by (or done to) the gas? Include the algebraic sign. J (b) What is the change in the internal energy of the gas? Include the algebraic sign. J
December 10, 2010 by leah

math
how do i work out the following word problem. a particular ball retains half of its heght on each bounce when dropped from a height of 80 m. give the height of the ball on the fifth bounce after being dropped?(will the ball comes to rest?)
May 19, 2012 by ladane

psychology
Describe a hypothesis related to the area of psychology in which you are predicting an interaction. Describe the specific nature of the interaction (how different levels of each independent variable work together to produce different outcomes) and why you think an interaction ...
February 25, 2013 by Toby

physics
a 20-kg box sits on a level floor. the coefficient of kinetic friction between floor and box is 0,60. how large a friction force opposes the motion of the box while moving? how much work must be done against friction to move the box 5,0 m?
October 27, 2014 by sutris

Spanish
i need help translating these sentences. only using the verb "estar" 1. My grandfather took my brother to the university. 2. My best friend is my work colleague. 3. It's my boyfriends necktie. 4. My female cat is in the garden. 5. My male cousin and I had a conversation. 6. ...
April 9, 2012 by Elizabeth

chemistry
when you hold a hydrogen filled pipet bulb horizontally with its mouth about 1 cm from a falme while gently squeezing what would you observe? a. the flame goes out b. a gentle pop and the flame may have been blown out c. the flame got bigger d. nothing happened I think that ...
May 10, 2010 by grace

Physics
Could you please check my answers and units.Also, help me with 3 and 4, I dont quite understand them. Thanxs! 1. An automobile starts from rest and accelerates at 3m/s2 for 4 seconds. How fast is it going after acceleration? -I got 12 m/s 3. At time = 0 an automobile already ...
August 28, 2007 by Emma

Physics
I tried working this out and I got 495 which is wrong. im not sure what to do. A two-stage rocket moves in space at a constant velocity of 4650 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity ...
October 26, 2010 by Xavier

AP Chemistry
Cytochrome, a complicated molecule that we will represent as CyFe2+, reacts with the air we breathe to supply energy required to synthesize adenosine triphosphate (ATP). At pH 7.0 the following reduction potentials pertain to this oxidation of CyFe2+: O2(g) + 4 H+(aq) + 4 e...
March 5, 2012 by Radhika

Chem AP
Cytochrome, a complicated molecule that we will represent as CyFe2+, reacts with the air we breathe to supply energy required to synthesize adenosine triphosphate (ATP). At pH 7.0 the following reduction potentials pertain to this oxidation of CyFe2+: O2(g) + 4 H+(aq) + 4 e...
March 5, 2012 by Radhika

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