
Physics
A uniform electric field of magnitude 410 N/C pointing in the positive xdirection acts on an electron, which is initially at rest. The electron has moved 3.00 cm. (a) What is the work done by the field on the electron?(b) What is the change in potential
asked by Greg on February 18, 2011 
Physics
An ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length L. The tension in the string is T Write the equation for centripetal force, and substitute the values T and L appropriately. Then with a bit
asked by James on March 20, 2014 
Physics
A 24.5kg child is standing on the outer edge of a merrygoround which has moment of inertia 989 kg • m2 and radius 2.40 m. The entire system is initially rotating at 0.180 rev/s. Find the angular velocity if the child moves to a final position 1.10 m
asked by Anonymous on November 21, 2014 
Changes in Matter
Which of the following geological changes are physical changes and which are chemical changes? a)formation of a limestone cave b)creation of a canyon by a river c)wearing of rocks by wave action d)destruction of lakes by acid rain e)heaving of the ground
asked by Sara on March 22, 2010 
calc
Consider the function below. (Round the answers to two decimal places. f(x) = 2x tan(x) p/2 < x < p/2 (a) Find the interval where the function is increasing. Find the interval where the function is decreasing. (b) Find the local minimum value. (c) Find
asked by bella on April 4, 2010 
Algebra
during a sale at the local department store, you buy three sweatshirts and two pairs of sweatpants for $85.50. later you return to the same store and but three more sweatshirts and four more pairs of sweatpants for $123. what is the sale price of each
asked by Katelyn on October 28, 2012 
math
Anna travels to work by car or by bicycle . The probability that she travels by car is 0.35 . If she travels to work by car ,the probability that she will be late is 0.12 .If she travels to work by bicycle,the probability that she will late is 0.25..Work
asked by Damian on September 17, 2017 
Chemistry
A piece of dry ice (solid carbon dioxide) with a mass of 25.5 g is allowed to sublime (convert from solid to gas) into a large balloon. Assuming that all of the carbon dioxide ends up in the balloon, what will be the volume of the balloon at a temperature
asked by Jake on February 25, 2011 
Physics
Two skaters, one with mass 68 kg and the other with mass 47 kg, stand on an ice rink holding a pole of length 8.8 m and negligible mass. Starting from the ends of the pole, the skaters pull themselves along the pole until they meet. How far does the 47 kg
asked by Elaina on November 1, 2011 
physics
a dockworker applies a constant horizontal force of 80 N to a block of ice on a smooth horizontal floor. The friction force is negligible the block start from rest and move 11m in 5 sec what is it mass & if worker stop pushing at 5sec .How for does the
asked by muqadir on December 13, 2015 
Chemistry
A piece of dry ice (solid carbon dioxide) with a mass of 25.5 g is allowed to sublime (convert from solid to gas) into a large balloon. Assuming that all of the carbon dioxide ends up in the balloon, what will be the volume of the balloon at a temperature
asked by Jake on February 25, 2011 
chemistry
A researcher put 10.0 moles of N2O into a 2L container at some temperature where it decomposes according to the following: N2O = 2N2+ O2. At equilibrium 2.20 moles of N2O remain. Calculate the Kc for the reaction. How am I supposed to fill in the ICE
asked by Laury on April 6, 2017 
Chemistry Dr.Bob
What is the final temperature and physical state of water when 250 grams of water at 85 degrees C is added to 80.0 grams of ice at 15 degree C? Is the physical state of water liquid? The explanation from bobpursly was this The sum of heats gained =0
asked by Student on March 1, 2016 
Algebra 2
Evan spent the summer earning money so he could buy the classics car of his dreams. He purchased the car for $2,295 from Fast Deal Freddie, the local used car salesman. Freddie told Evan that the car would increase by half its value after five years. Evan
asked by Anonymous on January 26, 2012 
physics
You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 17 m/s2. After 20 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect
asked by Danielle on August 9, 2014 
English
1. My father goes to work by car. 2. My father goes to work by his car. 3. My father goes to work in his car. (Which one is grammatical?)
asked by rfvv on May 19, 2010 
Physics/Math
A force F = (4.0 N)i + cj acts on a particle as the particle goes through displacement d = (3.4 m)i  (2.0 m)j. (Other forces also act on the particle.) What is the value of c if the work done on the particle by force F is each of the following? (a) zero
asked by Technoboi11 on March 1, 2007 
statistics
the probability that a key component of a stand by generator will fail during a power outage is q. A generator works if at least half of its key component work.Assuming that the the generator has four key components. find the probability that the
asked by TODOKO on December 9, 2015 
Chemistry
A sample of air was passed through an electrical discharge causing the following reaction N2(g) + O2(g)>2NO(g) . Assuming that 1.00 mole of air (78% N2, 21% O2) was originally present at 1.00 atm, determine the partial pressure (in atm) of NO at
asked by Anonymous on November 25, 2015 
Physics
Two horizontal forces Upper F1 Baseline and F2 act on a 3.6 kg disk that slides over frictionless ice, on which an xy coordinate system is laid out. Force F1 is in the positive x direction and has a magnitude of 7.1 N. Force F2 has a magnitude of 9.3 N.
asked by patrick on March 15, 2015 
Physics B
A 89.2 kg ice skater, moving at 16.1 m/s, crashes into a stationary skater of equal mass. After the collision, the two skaters move as a unit at 8.05 m/s. Suppose the average force a skater can experience without breaking a bone is 4296 N. If the impact
asked by Mary on November 12, 2012 
Physics
A mass of 4.77 kg of chilled water at 0C is placed in a freezer which is kept at −19.2C. Approximately how much electric energy is needed to operate the compressor to cool this water to −19.2 C if the room temperature is maintained at 24.2C? The
asked by physicshelp on January 13, 2013 
Statistics
1.A sample of 25 bottles is taken from the production line at a local bottling plant. Assume that the fill amounts follow a normal distribution. The probability is 90% that the sample variance is less than what percent of the population variance? 2. The
asked by abidjan on December 3, 2014 
English
Hello. I've already asked this question but I'd like to clarify if the sentence "Suggest your local radio stations play our songs" sounds normal natural English (it's a command, meaning "offer our songs to radio stations", "take them to radio stations".
asked by Ilma on April 13, 2011 
Chemistry
The solubility of a certain compound in icecold water is 0.22g in 100mL. Its solubility in hot water is 4.35g in 100mL What is the best possible percent recovery we can expect for the recrystallization of this compound in water?
asked by tom on September 29, 2011 
Physics
what is the final temperature of mixture, if 100gm of ice at 0 degree celcius into 100gm of water at 20 degree celcius in an iron vessel of mass 100gm.(specific heat of iron=0.1)
asked by Manish on February 2, 2013 
Algebra/Geometry
I am eating a snow cone in a paper cone with a height of 21cm and the radius of my snow cone ice is 3.25 cm. Find the amount of material needed to make my paper snow cone
asked by Angelita Marie on April 11, 2008 
math help pls pls pls
Tablets are on sale for 15% off the original price (t), which can be expressed with the function p(t) = 0.85t. Local taxes are an additional 8% of the discounted price (p), which can be expressed with the function c(p) = 1.08p. Using this information,
asked by Oscar on March 4, 2016 
math
A local road has a grade of 15%. The grade of a road is its slope expressed as a percent. a.Find the slope of the road as a fraction and then simplify the fraction.
asked by Laisha on October 13, 2018 
math
Here's my question: Fireworks are to be launched from a platform at the base of a hill. Using the top of the platform as the origin and taking some measurements, it was determined that the crosssection of the slope of one side of the hill is y=4x12 If
asked by Alex on January 26, 2015 
calculuscan someone please help me with this ques
I have two questions if someone can PLEASE help. 1.solve the equation in the real number system. x^4+11x^3+24x^223x+35=0 **Please show work** 2.Use the remainder theorem to find the remainder. When f(x)is divided by x3. Then use the factor theorem to
asked by Jennifer on December 30, 2012 
College Algebra
Simplify the expression: (6ax4)^2(2x)^2 I will be happy to critique your work or thinking on this. I will be happy to critique your work or thinking on this. Note that this is like a fraction with (2x)^2 in the denominator and (6ax^4)^2 in the numerator.
asked by Rey on July 7, 2007 
Chemistry
1)A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared. Calculate the initial pH of this solution. The Ka for CH3COOH is 1.8 x 105 M. As usual, report pH to 2 decimal places. *A buffered solution resists a change in pH.*
asked by JUNDY on March 10, 2015 
Calculus
Find the range of y = (3x1)/(2x^2 + x  6) I was going to take the derivative of the numerator and denomenator and then use the quotent rule to find the derivative of the function and find the critical values but I ran into the imaginary number during the
asked by Kate on July 25, 2010 
physics
At the end of the semester, you are loading your gear into a van to go home. In loading the van, you can either lift a 45.0kg crate straight up(method 1) or push it up a 3.00mlong ramp that is inclined at an angle above the horizontal (method 2).In both
asked by ajo on December 10, 2007 
physics
A typical car under hard braking loses speed at a rate of about 6 m/s2. The typical reaction time to engage the brakes is 0.50 s. A local school board sets the speed limit in a school zone such that all cars should be able to stop in 5.0 m. What maximum
asked by Nidhi on January 30, 2017 
Spanish
What are schools and organizations in silicon valley doing to foster growth for hispanic and latino students? a. Offering math programs in the summer b. Offering english classes year round C.offering tutoring classes in science during the weekends d.
asked by Girltt on May 18, 2016 
English/Reading
(Paragraph 4)Into this environment stepped a very determined woman. Francis Gabe hated housework. She said, "Housework is a thankless, unending job, a nerve tanglingbore. Who wants it? Nobody! With my jaw set hard, I was determined there had to be a
asked by MIW4LIFE on October 8, 2015 
Philosophy
Please help answer these questions Argument: Anything is possible Therefore, it must be possible that something is impossible This is a contraction  Not everything is possible because anything is possible. Types of appeals in arguments (Aristotle) Pathos
asked by Justin on May 16, 2012 
Poetry
I am supposed to give a literal explanation of this poem, but I am really confused by it. Your help will be much appreciated. Snow & Ice by Quincy Troupe ice sheets sweep this slick mirrored dark place space as keys that turn in tight, trigger pain of
asked by Tracey on April 13, 2007 
Pharmacist
Could you please give me links to where I can find out about Pharmacists. Powerpoints would be good. This is what I need, since Im doing a career Research project on this. Job duties/Responsibilities Education/Training Requirements Demographics (where can
asked by Anonymous on April 22, 2011 
8th Grade Journalism
Can somebody please confirm that I'm correct with the other answers? **Can somebody help me with the 2nd question please? Passive Voice to Active Voice Passive VoiceA college entrance exam was taken by nearly 100 students on Saturday. Results from the
asked by Music Lover 14 on December 3, 2016 
criminal justice theories
I have a scenerio of a 14 yr old boy from a poor family who shoplifts a mountain dew from a local convenience store. i have to comeup with a comprehensive, clear, and wellconstructed response of the theory of the biological explanation for his actions and
asked by deonna on January 20, 2007 
Math
Johnsons accumulated a nest egg of $40,000 to use as down payment toward a new home. Present gross income has them in high tax bracket, decided to invest min $2400/month in payments (for tax break). Financial obligations cannot exceed $3000/month. If local
asked by Sara on May 15, 2012 
Math
Johnsons accumulated a nest egg of $40,000 to use as down payment toward a new home. Present gross income has them in high tax bracket, decided to invest min $2400/month in payments (for tax break). Financial obligations cannot exceed $3000/month. If local
asked by Sara on May 15, 2012 
Art
Does "top up the phone" mean put money on your account? Can you give me an example, Writeacher? I need to include two or three more sentences on mobile phones, Writeacher. Could you please help me? 1) Parents have to shoulder responsibility for their
asked by Frank on May 5, 2012 
chemistry
Which of the following best describes the heat engine? A. A heat engine works through the conversion of energy in the form of heat to mechanical work. B. A heat engine works through the conversion of energy in the form of heat to chemical work. C. A heat
asked by Anonymous on December 13, 2012 
Science
A particular ecosystem in Georgia can support a maximum population of 100 bluebirds which of the following would allow hundred 20 bluebirds to live together in this ecosystem? (a. Human activity disrupting the nesting out of a predator hawk) (B. Flooding
asked by Ruby :) on February 17, 2015 
Language
One particularly nice afternoon, several students were trapped in a classroom listening to a monotonous lecture by a professor the local college. After over two hours of mindnumbing discourse, one student stood up in despair and noted that she had a book
asked by Megan on March 2, 2009 
Maths
I'm after understanding more than an answer but an answer would be greatly appreciated. The question reads as "On the answer sheet for this question is shown an xy graph of the function [y(x)=x^2cos(3x)] Add to that same picture a rough sketch of the
asked by Jack on November 16, 2010 
Math
I'm after understanding more than an answer but an answer would be greatly appreciated. The question reads as "On the answer sheet for this question is shown an xy graph of the function [y(x)=x^2cos(3x)] Add to that same picture a rough sketch of the
asked by Jack on November 17, 2010 
AP biology
I posted this question three days ago but no one answered. Hi you guys I am having trouble with the "cell communication" chapter so I would really appreaciate if someone could help out with this question "What could happen to the target cells in an animal
asked by Claudia on December 7, 2007 
Early Childhood Education Interpersonal Skills
As an Educational Assistant you are leading a group converstation with 12 grade 4 students. They are having a discussion about the story that they have just read about a boy who has stolen a toy from a local corner store. The conversation has turned to the
asked by Sally J Raphel on January 15, 2013 
Educational Assitant
As an Educational Assistant you are leading a group converstation with 12 grade 4 students. They are having a discussion about the story that they have just read about a boy who has stolen a toy from a local corner store. The conversation has turned to the
asked by Sally J Raphel on January 16, 2013 
physics
You pick up a 3.2 kg can of paint from the ground and lift it to a height of 1.4 m . Part A How much work do you do on the can of paint? Express your answer to two significant figures and include the appropriate units. Part B You hold the can stationary
asked by ... on October 24, 2016 
Physics
An ice skater, has a rotational inertia of I = 4 kg m2, and spins at 2 rad/sec. She then changes her rotational inertia to 2 kg m2. What is her final angular velocity? a. 4 rad/s b. 2 rad/s c. 2.8 rad/s d. 8 rad/s The answer must be A then right.
asked by David on April 30, 2009 
Intro To Law
Can someone please help me with my answers? 1. Most states do not hold strict laws related to the licensing of A Attorneys B Judges C Counsel D Paralegals** 2. A person who offers lawrelated advice without the appropriate licensing is committing A
asked by FMSLION on January 17, 2018 
physics
A rocket is fired straight up and accelerates upward at 24 m/s2 for 12 seconds. The rocket then runs out of fuel and coasts. Ignore any air resistance effects and use 9.8 m/s2 for the local acceleration due to gravity. a) What is the rocket’s maximum
asked by help on September 28, 2011 
Heeeeeeeelp
Read the following instructions in order to complete this assignment and review the example of how to complete the math required for this assignment: Use the properties of real numbers to simplify the following expressions: 2a(a – 5) + 4(a – 5) 2w –
asked by Myya on September 15, 2013 
Math
Larry mows the samesized lawns in his neighborhood each weekend during the summer. Part A Each time Larry mows a lawn he uses 1/6 of a gallon of gasoline. If he has 2/3 of a gallon of gasoline, how many lawns can he mow before he needs to buy more
asked by Anonymous on March 16, 2015 
physics please check
a. Two sticks are rubbed together to start a fire. b. A firecracker explodes. c. A redhot iron bar is set aside to cool. In which of the situations listed above is energy being transferred as heat to the system in order for the system to do work? I would
asked by Anonymous on February 4, 2007 
physics
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.9 × 104 kg, and the force causes its speed to change from 7600 to 5400 m/s. (a) What is the work done by the
asked by shaknocka on February 28, 2011 
Chemistry Help PLEASE!!
I don't know how to do this question, I understand we have to use ICE but I keep getting the wrong answer when I solve for x, it's just not working for me. Consider the following reaction: A(g) > 2B (g) Find the equilibrium partial pressures of A and B
asked by Student on February 25, 2012 
Physics
an ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +13m/s^2. At t1, the rocket engine is shut down and the sled moves with constant velocity v until t2. The total distance traveled by the sled is 5.30*10^3 m
asked by Anonymous on September 27, 2017 
Physics
Stuck in the middle of a frozen pond with only your physics book, you decide to put physics in action and throw the 9kg book. If your mass is 45 kg and you throw the book at 10 m/s, how fast do you then slide across the ice? (Assume the absence of
asked by James on June 6, 2012 
science
A copper calorimeter weighs 100g when empty, 400g when half full of water at 0 degrees Celsius, and 450g when ice at 0 degree Celsius is added. When some steam is passed into the mixture, its temperature is raised by 10 degrees Celsius. Find the quantity
asked by agajere on February 3, 2017 
Chemistry
I'm supposed to do this for an organic chemistry prelab. I've read my books and tried Googling everything possible, but I still don't know how to set this up. Please help! The solubility of a certain compound in icecold water is 0.18g in 100 mL. Its
asked by Katy on September 29, 2011 
chemisrty  ICE CHART DEPOSTION
How do i fill out an ICE chart when i am only given an initial concentration of one reactants and an equilibrium of another reaction? inital 0.045 HNO2(aq) Equilibrium 0.0043 H3O+(aq) NO2(aq)  no information my first thought was to sqaure root .0043 mol/l
asked by Tara on November 22, 2012 
chemisrty  ICE CHART DEPOSTION
How do i fill out an ICE chart when i am only given an initial concentration of one reactants and an equilibrium of another reaction? inital 0.045 HNO2(aq) Equilibrium 0.0043 H3O+(aq) NO2(aq)  no information my first thought was to sqaure root .0043 mol/l
asked by Tara on November 22, 2012 
chemistry help!!!!!
Consider the following reaction: Find the equilibrium partial pressures of A and B for each of the following different values of Kp. Assume that the initial partial pressure of B in each case is 1.0 atm, and that the initial partial pressure of A is 0.0
asked by student on March 12, 2012 
PHYSICS
A dockworker applies a constant horizontal force of 71.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 10.0m in a time of 5.50s . If the worker stops pushing after 5.50s
asked by JADE on August 10, 2014 
physics
Stuck in the middle of a frozen pond with only your physics book, you decide to put physics in action and throw the 6kg book. If your mass is 54 kg and you throw the book at 14 m/s, how fast do you then slide across the ice? (Assume the absence of
asked by Anonymous on February 23, 2011 
college physics
A hockey puck of mass 0.228 kg si sliding across level ice. There is a force of friction of 0.057 N acting opposite the direction of motion of the puck while it is sliding. a) what is the acceleration of the puck while it is sliding? b)if it initially has
asked by javelin on July 10, 2017 
physics
A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 12 degrees with the horizontal. The rope moves parallel to the slope with a constant speed of 1.0 m/s. The force of the rope does 880 J of work on the skier as the skier
asked by Anonymous on November 16, 2011 
Physics/Math
What work is done by a force (in newtons) F = 3.1xi + 3.1j, with x in meters, that moves a particle from a position r1 = 2.1i + 2.5j to r2 =  4.9i 3.9j? For Further Reading * Physics/Math  bobpursley, Thursday, March 1, 2007 at 6:27am Work is the dot
asked by Technoboi11 on March 3, 2007 
managerial economics
An airline transportation consultant offers the CEO of BlueStar, a struggling new commercial airline company, the following advice conscerning the airline's high operation costs in the current quarter: "You don't have enough aircraft to operate
asked by tina on August 15, 2010 
Chemistry
The heat of fusion for water is 80cal/g. The specific heat of liquid water is 1.00cal/g. How many calories of heat are released when 20g of water at 30 degrees is cooled to 0 degrees and frozen to ice at 0 degrees?
asked by Leah on July 20, 2010 
Calculus
Hello. I have a few questions from my study guide, that I need to know to study for my test. 1) x^(2/3)*((5/2)(x) a) determine the ordered pairs of the local extrema of the function. Use the second derivative test. B) determine the ordered pairs of all
asked by Matt on November 10, 2014 
algebra
Managers of a local shopping mall selected a random sample of shoppers and recorded the gender of each. Here are their results. Gender Number of People Male 75 Female 108 Based on this sample, how many of the next 2000 shoppers would we predict to be male?
asked by Anonymous on August 8, 2017 
Math
Managers of a local shopping mall selected a random sample of shoppers and recorded the gender of each. Here are their results. Gender Number of People Male 69 Female 106 Based on this sample, how many of the next 2000 shoppers would we predict to be
asked by Melanie on August 20, 2017 
English!
The tone of "A smile" is ? A: Hopeful B: Cheerful. C: tense D: light Answer : D In "Boast Not , Proud English," the writer is protesting against: A: Prejudice B: Blasphemy C: Religion D: tolerance Answer: C ? In "Birches," Frost compares the broken ice
asked by Ciara on March 27, 2013 
English
The tone of "A smile" is ? A: Hopeful B: Cheerful. C: tense D: light Answer : D In "Boast Not , Proud English," the writer is protesting against: A: Prejudice B: Blasphemy C: Religion D: tolerance Answer: C ? In "Birches," Frost compares the broken ice
asked by Ciara on March 27, 2013 
Accounting
Department J had no work in process at the beginning of the period, 18,000 units were completed during the period, 2,000 units were 30% completed at the end of the period, and the following manufacturing costs were debited to the departmental work in
asked by Anonymous on June 30, 2013 
English Improving writing rough draft
Please take a look at this for me this is what I plan to this in however one last look would be great thanks so much for all of your help. :) Prewriting Paragraph 1 The problem is Jack and Rachel often have nothing to do Bonnie and Molly are working extra
asked by KaleighAnne on June 21, 2008 
History
Which best analyzes criticisms of the New Deal? a.The New Deal was seen as promoting American dependency on the federal government. b.The New Deal was widely condemned for decreasing the power of the United States Supreme Court. c.The New Deal was
asked by James on August 14, 2018 
History
Which best analyzes criticisms of the New Deal? a.The New Deal was seen as promoting American dependency on the federal government. b.The New Deal was widely condemned for decreasing the power of the United States Supreme Court. c.The New Deal was
asked by Anonymous on January 25, 2018 
World History
Which best analyzes criticisms of the New Deal? The New Deal was widely condemned for decreasing the power of the United States Supreme Court. The New Deal was denounced for increasing the national debt and reach of the federal government. The New Deal was
asked by Collin on August 8, 2018 
Physics 203
A puck of mass 0.60 kg approaches a second, identical puck that is stationary on frictionless ice. The initial speed of the moving puck is 5.0 m/s. After the collision, one puck leaves with a speed v1 at 30° to the original line of motion. The second puck
asked by Kayla on March 29, 2011 
I need help with these please ALGEBRA
1. Consider the leading term of the polynomial function. What is the end behavior of the graph? Describe the end behavior and provide the leading term. 3x5 + 9x4 + 5x3 + 3 2. Evaluate : sqrt7x(sqrtx7sqrt7) show your work. 3. Solve the equation. Check for
asked by Ciaria on March 18, 2015 
math
In the first quarter of a year, a company’s records showed that 68% of its sales employees missed no work and 76% of its sales employees made their sales quota for the quarter. Of the sales employees who missed no work, 87% made their sales quota for the
asked by Evans on May 4, 2018 
physics
An 8 kg ball is moving at 4 m/s. Work is done on the ball to give it a speed of 12 m/s. What is the balls initial kinetic energy? What is the balls final kinetic energy? What work was done on the ball?
asked by Anonymous on June 30, 2011 
Statistics
A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term mean daily sales were $24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of $25,910. Does this indicate
asked by Jasmine on March 25, 2012 
Physics
1)An electron moved from point A to point B along an equipotential surface. a)the eclectron performs work in moving from point A to point B b)Work is required to move the electron from point A to point B c)Work is both required and performed in moving the
asked by Andrea on April 6, 2008 
English
1. Be sure (that) you arrive at work on time every morning. 2. Make sure (that) you arrive at work on time every morning. 3. Be sure to arrive at work on time every morning. 4. Make sure to arrive at work on time every morning.  Are they
asked by rfvv on May 17, 2017 
Physics
Just as no mechanical device can be 100% efficient, no heat engine can transfer 100% of its heat to a single object. Some of the heat energy must be wasted (released into the environment). We have a heat engine that produces 150 J of heat, does 40 J of
asked by Jessica on December 7, 2016 
Intergovernmental Relations
I am doing a paper on the balance of power between federal local and state governments in the even of a national disaster. One of the questions posed to me was Should the federal government's superior financial resources supersede concerns about
asked by V on March 31, 2009 
chemistry
A vitamin C tablet containing 250 mg of ascorbic acid (C6H7O6; Ka = 8.0 x 105 is dissolved in a 250 mL glass of water. What is the pH of the solution? i tried answering this question multiple times but i still get it wrong.... can someone help?
asked by Finding the pH of a weak acid? on March 20, 2012 
dynamics
cars A and B are d=60m apart and traveling respectively with constant speeds v1=32km/h and v2=24km/h on an ice covered road.knowing that 45s after driver A apples his breaks to avoid overtaking car Bthe two cars collide,determine a)the uniform deceleration
asked by rajesh on October 8, 2012 
CHEMISTRY
How many grams of CH4 are required to produce 43 g of Cu according to the following equation: 4CuO + CH4 > CO2 + 2H20 + 4Cu? I already tried to work the problem myself, and I may have gotten this right, but I do not have an answer key to compare to.
asked by Casey on July 10, 2010 
English
Can you please tell me if I made any mistakes in the following sentences? Thank you very much for your help. Thank you for your corrections. Can you please check the grammar in the following letter, please? 1) Do you think you can help me find a school in
asked by Franco on November 4, 2010