Questions Asked on
March 15, 2012

  1. Chemistry

    Consider the decomposition of a metal oxide to its elements, where M represents a generic metal. M203(s)---> 2M(s) + 3/2 O2(g) info given for Gf(kJ/mol): M203= -10.60 M(s)=0 O2(g)= 0 1.) what is the standard change in Gibbs energy for rxn as written in

    asked by Kelsey
  2. calculus

    Find the critical point(s) of the function. Then use the second derivative test to classify the nature of each point, if possible. Finally, determine the relative extrema of the function f(x,y)= 3x^2 - 3e^5y^2

    asked by amalia
  3. Geometry

    Hi, I'm having a difficult time understanding a couple of Geometry questions on my homework and I'd really appreciate it if someone could answer them and explain to me how to get the same answer. Question 1: A regular pentagon has an apothem of 3.2 m and

    asked by Tyler
  4. Math

    R varies jointly as S and the square of T. If R is 32.4 when S=0.2 and T=9, find R when S=0.5 and T=5. I believe the answer is R=25, could someone check this for me?

    asked by Allie
  5. Math


    asked by Shihara
  6. physics

    Dry saturated steam at 100 degree C is passed into 250 gm of a mixture of ice and water contained in a calorimeter of thermal capacity 45J/K.When all the ice has just melted,the mass of the content has increased by 10 gm due to condensed steam.Assuming no

    asked by AFOLABI .O.
  7. Calculus (Derivatives of Inverse Functions)

    Suppose f(x) = sin(pi cos(x)). On any interval where the inverse function y = f^-1(x) exists, the derivative of f^-1(x) with respect to x is: I've come as far as y = arccos ((arcsin(x))/pi), but I am not certain this is right.

    asked by Mooch
  8. Calculus (Please check my work!)

    Suppose that y = f(x) = x^2 - 4x + 4. Then on any interval where the inverse function y = f-1(x) exists, thederivative of y = f-1(x) with respect to x is: (Hint: x^2 - 4x + 4 can be factored and rewritten as "something" squared.) Work thus far: Okay, so I

    asked by Anonymous
  9. College Physics

    A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 220 J from 460 J. How high does she rise during this interval? Neglect air resistance. The quarter is over but

    asked by Angela
  10. Physics

    Consider the 665 N weight held by two cables The left-hand cable had tension T2 and makes an angle of 43◦ with the ceiling. The right-hand cable had tension T1 and makes an angle of 48◦ with the ceiling. What is the tension in the cable T1 slanted at

    asked by Ashley
  11. physics

    The oscillations of two points x1 and x2 at x = 0 and x = 1 m respectively are modelled as follows: y1 = 0.2 sin 3pt and y2 = 0.2 sin (3pt + 8 p ) Calculate the wavelength and speed of the associated wave.

    asked by swapnali
  12. Chemistry

    Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.230 M HClO (aq) with 0.230 M KOH (aq). The ionization constant (Ka) for HClO is 4.00 x 10^-8. (b) after addition of 25.0 mL of KOH (d) after addition of 50.0 mL of KOH

    asked by Rosi
  13. business

    13. (TCO 2) Creating competition between employees within the corporation: (Points : 1) can encourage employees to deceive customers should focus on improving corporate profit must be ignored when corporate ethics are developed can bring out the best in

    asked by elena
  14. math

    2) In a certain instant lottery game, the chances of a win stated as "3 in 23". Express the indicated degree of likelihood as a probability value between 0 and 1 3) A certain company reduced its management staff from 20 managers to 16. The company claimed

    asked by Jamie
  15. CAL 2

    Use Euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem y'=5x+y^2, y(0)=-1 y(1)=

    asked by Josh
  16. Statistics

    A coffee company wants to make sure that there coffee is being served at the right temperature. If it is too hot, the customers could burn themselves. If it is too cold, the customers will be unsatisfied. The company has determined that they want the

    asked by Rachel
  17. Chemistry

    balance this equation NaOH + H2SO4 = NaSO4 + H2O

    asked by Amir
  18. math

    Write the expression as a logarithm of a single quantity. (4marks) A)3log5a + 4log5b - 2log5c B)3log2 -1/3log(x^2-1)

    asked by james
  19. Chemistry (buffers)

    Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. a. What would be the initial pH of Buffer C? HOW???????

    asked by James
  20. physics

    Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is μk = 0.28.

    asked by tom

    The production of batteries manufacturing department of a company is monitored weekly.100 such batteries have to be produced each week before being tested by putting them into toys and seeing how long they last.The results of 20 tests are shown below: 31

    asked by pallavi
  22. algebra

    6 n 23 convet to a mix number

    asked by Anonymous
  23. Physics

    If you step on your car's brakes hard, the wheels stop turning (i.e., the wheels "lock") after 1.5 revolutions. At the same constant acceleration, how many revolutions do the wheels make before stopping if your initial speed is twice as high?

    asked by Krista
  24. math

    you hav three boards and one board is 48" long .and the one board btween the top and bottom board is 2and 1/2" long. how many boards will it take to cover those 2 boads

    asked by Anonymous
  25. chemistry

    redox reaction..types of redox reaction and explain

    asked by faith
  26. physics

    A player kicks the football from the ground with a velocity of of 30m/s at 45 degree angle. The time take to reach maximum height was 0.7 s. Find the maximum height and describe your work.

    asked by Anonymous
  27. Statistics

    4. A coil of wire has 600 metres of wire. Suppose there are 20 nicks (the most common problem with wire) are randomly distributed on a coil. a) What is the probability that in a 60 metre length of wire there will be at least 3 nicks? b) What is the

    asked by Waseeq.A
  28. Chemistry

    The equilibrium constant Kc for the following reaction is equal to 0.20 at 250°C. Calculate the equilibrium constant Kp for the reverse reaction at the same temperature. COCl2 (g) = CO (g) + Cl2 (g) I'm sorry.. English is a second language for me. After

    asked by David
  29. Finite Math

    An urn contains six red balls and five white balls. A sample of 2 balls is selected at random from the urn. What is the probability that at least one of the balls is red?

    asked by Amanda
  30. Finance

    You deposit $1000 for 5 years at 4% annual interest. In 5 years, you add $10000 to your account, but the rate on your account changes to 8% annual interest (for existing balance and new deposit). You leave the account untouched for an additional 15 years.

    asked by Basil
  31. E.C.E

    The Boolean search connector OR is used for which of the following purposes?

    asked by Trina
  32. statistics

    In the following regression, X = total assets ($ billions), Y = total revenue ($ billions), and n = 64 large banks. (a) Write the fitted regression equation. (b) State the degrees of freedom for a twotailed test for zero slope, and use Appendix D to find

    asked by ronald
  33. Algebra 2

    Write a rule for the nth term of the arithmetic sequence. ( I'm not sure how I'm suppose to write the numbers below a :C so bare with me ) a(2) = - 28, a(20) = 52 I used the formula a(n) = a(1) + ( n-1)d a(20) = a(1) + (20-1)d > 52 = a(1)+19d a(2) = a(1) +

    asked by Sammy
  34. Pre- calculus

    Find A, given that a = 18.2, B = 62, and C = 48. Round answers to the nearest whole degree. Do not use a decimal point or extra spaces in the answer or it will be marked incorrect.

    asked by Lucy
  35. Chemistry

    A saturated Ni(OH)_2_ can be prepared by dissolving 0.239 mg of Ni(OH)_2_ in water to make 500.0 mL of solution. What is the Ksp for Ni(OH)_2_?

    asked by Shane
  36. geometry

    a person is standing 40ft from a flagpole and can see the top of the pole at a 35 degree angle of elevation. the persons eye level is 4ft from the grond. what is the height of the flagpole to the nearest foot

    asked by victoria
  37. Economics

    How does a laissez faire economy make the decision about what goods and services will be produced? a.) Lawmakers in government vote on what will be produced b.) Producing firms decide what they choose to produce, cusumers will follow c.) What will be

    asked by Stacy
  38. Algebra 2

    The first row of a concert hall has 20 seats, and each row after the first has one more seat than the row before it. There are 30 seats. a)write a rule for the number of seats in the nth row b) 40 students from a class want to sit n the same close

    asked by Please check my answer (:

    what is the sensitivity of a crt equipment given that deflection voltage 1500v and passing through a deflection plate of length 15m,distance of the plate is 100cm and acceleration voltage is 200v

    asked by NWAFOR
  40. 3 grade english ms sue

    vowels:r-controlled directions replace the sound in each word with the correct combination of letters. choose one of the combinations in the box. write the word on the line. /er/spelled ir,er,ur,ear,or ar spelled or spelled or,ore,oar 1- moth/er/ my son

    asked by dw
  41. calculus

    Find the critical point(s) of the function. Then use the second derivative test to classify the nature of each point, if possible. Finally, determine the relative extrema of the function. f(x,y)=3x^2 - 3xy + 3y^2 +5

    asked by amalia
  42. physical aspects of nature

    A 1,440-N crate is being pushed across a level floor at a constant speed by a force of 250 N at an angle of 20.0° below the horizontal; (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 250-N force is instead

    asked by greg
  43. Cal

    Use Euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem. y' = 5x + y^2, y(0)=-1. y(1)=

    asked by McClain
  44. math

    solve tan 2(A-B)

    asked by yuyu
  45. History

    What are some gallant examples from the movie The Purple Heart??

    asked by Anonymous
  46. Chemistry

    Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. a. What would be the initial pH of Buffer C? HOW???????

    asked by Frank
  47. Chemistry

    Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. a. What would be the initial pH of Buffer C? HOW???????

    asked by Frank
  48. calculus

    Given the function f(x) = 3x - 9 a. Find the rate of change between the two stated values for x: 7 to 8 b. Find the equation of a secant line containing the given points: (7, f(7)) and (8, f(8))

    asked by bobbie
  49. distance

    1 ship leaves port everyday. After 30 days it returns. How many ships will it see on the way back ?

    asked by neal
  50. physics

    You're on a magic bridge floating 25 meters above a lake. You through a rock at an angle of sixty degrees. It takes 5.8 seconds for the rock to reach it's highest point. (a) With what speed did you throw the rock? (b) How far away from the bridge

    asked by Nicole
  51. stuck

    A 1100 kg car moving south at 16.0 m/s collides with a 2650 kg car moving north. The cars stick together and move as a unit after the collision at a velocity of 5.36 m/s to the north. Find the velocity of the 2650 kg car before the collision.

    asked by Anonymous
  52. victorville

    Anna did a survey on the weight of students' backpacks at her middle school. The weights, in pounds, of 10 backpacks are listed below. What is the mean (average) weight, in pounds, of the 10 backpacks? 10 17 12 8 9 7 15 14 6 12

    asked by brianna
  53. Algebra 1

    REINY, Thank you for your answer and the answer is obviously correct when you go back and do the multiplying ......however , I do not just want the answer, I desperately wish to understand from start to finish how you got the answer. I am sorry if I seem

    asked by connie
  54. Chem

    How would the reducing agent NaBH4 compare with that of LiAlH4?

    asked by Joel
  55. math

    Kennys lawn is 30 feet wide and 30 feet long. It takes him 1 hour to mow the lawn. If kenny mows at the same rate, about how many hours would it take him to mow a lawn that was 30 feet and 95 feet long?

    asked by chine
  56. victorville

    Which expression shows how the distributive property can be used to multiply the following numbers? 9 × 4.99

    asked by brianna
  57. Chemistry(Please respond, thank you!)

    For the system CaO(s) + CO2(g) = CaCO3(s), I added 1.00 mol of CaO(s) to 1.00L of 0.500M CO2(g) at 200 oC. At equilibrium the [CO2] = 0.150M. What is the value of Kp for this reaction? Kp would = CaCO3/(CaO)(CO2) I do not know what to do with the 0.500M

    asked by Hannah
  58. Algebra 2

    What is 4x^3 + 8x^2 - 96x in factored form

    asked by TENKAICHI
  59. child psychology

    Piagets famous -----------problem demonstrates preoperational children's difficulity with---------- A. three mountains; dual representation B.three mountains;hierarchical classification. C. class inclusion; hierarchial classification

    asked by sarah
  60. physics

    a car of mass 50kg accelerates on a straight level road with coeficient of friction 0,3.what is the minimum force required for the car that to start moving?

    asked by Marshall
  61. physics

    a car of mass 50kg accelerates on a straight level road with coeficient of friction 0,3.what is the minimum force required for the car that to start moving?

    asked by Marshall
  62. childhood education

    Which factors seem to be most important for development of make-believe play. A. children's readiness to engage in make- believe play and social experiences that promote it. B.opportunities for peer interaction in settings that inspire make-believe play.

    asked by sarah
  63. calculus-domain

    Hello, I would greatly appreciate your input. I just need some reassurance that I'm going about this question the right way. I am to find out where h(x)=x*(x-1)^(1/3)is increasing and decreasing. so after I did some solving I found my critical points to be

    asked by mary
  64. Math

    sketch the region bounded by the graphs of f(y)=(y/Squareroot of(16-y^2)), g(y)=0, y=3 and find the area of the region.

    asked by Kim
  65. health

    What is a medical scientist,if you want to study medical science,what are the minimum requirements?and how can you briefly describe medical science?

    asked by Cynthia
  66. statistics

    10.51 A statistics professor compared the scores of her morning class and afternoon class on the same quiz. The 42 morning students’ average score was 83.52 with a standard deviation of 7.81, while the 46 afternoon students’ average score was 79.44

    asked by cindy
  67. Chemistry(Please respond)

    A study of the system, H2(g) + I2(g) == 2 HI(g), was carried out. Kc = 54.9 at 699.0 K (Kelvin) for this reaction. A system was charged with 2.50 moles of HI in a 5.00 liter vessel as the only component initially. The system was brought up to 699.0 K and

    asked by Hannah
  68. Finite Math

    Eight white socks and four red socks are in a drawer. If two socks are selected at random, what is the probability that both socks are the same color?

    asked by Amanda
  69. C++

    you are right the question is exactly like this... can you help me for this question.... thanks Write a MAIN function and a FUNCTION to compute the sum of the below series. ((-1)^(n+1)*n!)/(n^n) (from n=1 to infinity) Within the MAIN function: . Read a

  70. donwoody

    A football field forms a rectangle. 120yd long 53yd find the perimeter

    asked by maria
  71. Chemistry(Please respond, thank you!)

    Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) So I understand that 2NO + Cl2 + 1/2O2 = NO2 + 1/2 Cl2 but I do not

    asked by Hannah
  72. Finite Math

    A factory produces fuses, which are packaged in boxes of 26. Eight fuses are selected at random from each box for inspection. The box is rejected if at least one of these eight fuses is defective. What is the probability that a box containing twelve

    asked by Amanda
  73. Finite Math

    Without consultation, each of five organizations announces a one-day convention to be held during July. Find the probability that at least two organizations specify the same day for their convention.

    asked by Amanda
  74. Finite Math

    A law firm has thirteen senior and nine junior partners. A committee of 6 partners is selected at random to represent the firm at a conference. What is the probability that at least one of the junior partners is on the committee?

    asked by Amanda
  75. Life Orientation

    Name and explain 3 checks and balances that are in place in South Africa that control and regulate media

  76. physics

    What should be the resistance to draw a current of 3.5A on 115V

    asked by ******tasha******
  77. science

    Who would have to overcome inertia to move the ball, a golfer or a soccer player?

    asked by anne
  78. MATH!

    The mass of a radioactive substance follows an exponential decay model, with a decay rate of 5% per day. A sample of this radioactive substance was taken six days ago. If the sample has a mass of 3 kg today, find the initial mass of the sample. Round your

    asked by Kim
  79. Chemistry

    1.CALCULATE pH of 1.0 L 0.010 M ascetic acid and 0.50 L 0.010 M NaOH. 2. Calculate pH of 1.0 L 0.010 M NaOH and 0.500 L 0.010M HCl Buffer help?

    asked by ALISON
  80. physics

    A brick of mass 0,5 kg possesses 100J of gravitational potential energy when held at a certain height above the ground.How long will it take to reach the ground when it is released?

    asked by Samantha
  81. Safety

    Please help me to unscramble these 40 letters into 2 sentences that has 12 words. A A A A E E E E E E E I I I I O O U U C D F J K L L L N N N P P R S T T T T T Y . The puzzle includes some letters as follows:(use blanks from above) _ _ / _ _ f _ _ _ /_ s /

    asked by Mike
  82. help chem!:/

    a) Calc. PH of 0.010 M HF and 0.030 M KF e) calc. PH Zn(OH)2 in wAter

    asked by ALISON
  83. English

    Writeacher, I urgently need your help to check a few sentences on job. 1)When I go to the supermarket, first I get the trolley and then I go to the meat and fish section and finally to the check-out counter. I usually pay cash but sometimes by/with the

    asked by Matthew
  84. Chemistry

    When chemists compare the rates of reactions carried out under different conditions, they often compare the rates near the beginning of the reactions. What advantage(s) do you see in this practice? Hint: Think of slow reactions. I know the rate of reaction

    asked by Alana
  85. statistics

    Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. (a) How many would you expect to be between 158 and 172 cm tall?

    asked by Shelly
  86. English

    I forgot to add the following data. Thank you very much. 1) You should make a short list of the job requirements before going for the interview. 2) There is nothing wrong with pulling out the paper with the company’s data on during the interview. 3) You

    asked by Matthew
  87. calculus-derivatives

    Hello, please help me. I needed to find the derivative of f(x)= x^4 -2x^3 + x +1. I got f'(x)= 4x^3 -6x^2 +1. I would like to figure out the critical numbers so I can figure out where it increases and decreases, but I have no idea how to factor it... Is it

    asked by mary
  88. geometry

    The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D?

    asked by roxie
  89. Calculus

    at noon A is 150 km west of a ship B .Ship A is sailling east at 35 km/h , and ship B is sailling north at 25 km/h. How fast is the distance between the ships changing at 4 pm ?

    asked by Sandra g
  90. College Physics

    A 45.7-g golf ball is driven from the tee with an initial speed of 46.0 m/s and rises to a height of 25.9 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 6.82 m below its

    asked by Angela
  91. Statistics

    sd 20 mean 100 x 125 looking at table z-0.8944 do we put a 1 in front and substract it from 0.8944 to make it .1056 or is the answer just the number the table indicates? In other words does the problem finish after you get the z number or do we continue by

    asked by interestedhey
  92. Math

    What are the next two numbers in this pattern? 72 86 75 89 80 ___ _____

    asked by tj
  93. Math

    A boat travels 45 miles upstream in 5h. The boat travels the same distance downstream in 3hr. What is the rate of the boat in still water? What is the rate of the current? (thank you)

    asked by Analica
  94. Life orientation

    What , according to the basic conditions of employment Act applies with regard to the contraventions that were identified?

    asked by Thembi
  95. Social Studies

    what is the story of Judaism?

    asked by Markeis
  96. Science

    How can science be used to help discourage seagulls from attacking students during lunch?

    asked by John
  97. Chem 1A

    Help please! How many moles of NaOH must be added to 1.0 L of 3.0 M HC2H3O2 to produce a solution buffered at each pH? 1) pH= 3.78 2) PH= 6.52

    asked by Mackenzie
  98. math

    30% of the tickets sold by a movie theater for the Friday night show were children's tickets at $4 each. The rest of the tickets were sold at the full price of $8.50. The movie theater collected $360 just for the children's tickets. How many tickets did

    asked by john
  99. Science

    Ten grams of ice are heated in a closed container until it turns to steam. What is the mass of the steam?

    asked by Maura
  100. Chemistry

    Calculate the pH after 0.011 mol NaOH is added to 1.00 L of each of the four solutions. a) 0.100 M propanoic acid (HC3H5O2, Ka= 1.3 10-5) b) 0.100 M sodium propanoate (NaC3H5O2) c)pure H2O d) 0.100 M HC3H5O2 and 0.100 M NaC3H5O2

    asked by Mike
  101. math finance

    Consider the N-period binomial model and processes Y0,Y1,...YN and C0,C1,...CN. Suppose that Y is Markov and C is deterministic (i.e., Cn does not depend on the coin flips ù). a) Show: If Cn doesn't equal 0 for all n, then C0Y0,C1Y1,....,CNYN is Markov.

    asked by abdul
  102. Hamlet

    Why did Shakespeare choose the precise statements for Laertes to revenge the murderer of his father in Act IV?

    asked by Scarlet
  103. Chem 1A

    A 15.00 g sample of an ionic compound NaA, where A- is the anion of a weak acid, was dissolved in enough water to make 100.0 mL of solution and was then titrated with 0.100 M HCl. After 700.0 mL of HCl was added, the pH was 5.00. The experimenter found

    asked by Ashley
  104. English

    Is this sentence in past progressive tense? The freshman math classes were already behind schedule by three weeks.

    asked by Matt
  105. Algebra 2

    Tracey is contemplating the purchase of 100 shares of a stock selling for 15 per share. The stock pays no dividends. Her broker says that the stock will be worth 20 per share in 2 years. What is the annual rate of return on this investment?

    asked by Anonymous
  106. Math

    If threr are a total of 20 students in Bibi's class, how many boys are in the class? How manygirls are in the class?

    asked by Emily
  107. DrBob222

    I know I posted this but you didn't answer! Please help!!!! Consider the following reaction at 298 K: C(graphite) +2Cl2 (g) -----> CCl4(l) Calculate the following quantities. Delta H: -139 kJ/mol deltaS(sys)=? J/mol*K deltaS(surr)=? J/mol*K deltaS(univ)=?

    asked by Kelsey
  108. Math

    How do you list 2/3,1/2,1/3,3/4,1/8 from least to greatest?

    asked by Sarah
  109. College Physics

    A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 28.2 ° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 46.7 kg, and the coefficient of

    asked by Angela
  110. washington state history

    What are the problems faced by native americans in their journey from central asis to present day state of washington?

    asked by lisa
  111. washington state history

    What are the similarities and differences in the dangers experinced by the coastal indians who hunted whales and the plateu indians who crossed the rockies?

    asked by lisa
  112. washington state history

    What are the different types of clothingworn by washington coastal and plateau indians in the summer and winter?

    asked by lisa
  113. Physics

    A bullet of mass 0.06kg is fired horizontally with a muzzle speed of 700 m/s into a pendulums hanging block of mass 2.0kg. The block and the bullet then move up a height, h, above the pendulums equilibrium position. What is the speed of the bullet/block

    asked by Erin
  114. Piz Help !!!!!!!!!!!!!!!!! ELA

    Could You give me a example of a sentence of ceaselessly?

    asked by Zack
  115. College Physics

    Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 43.5 km/s and 54.0 km/s. The slower planet's orbital period is 6.53 years. (a) What is the mass of the

    asked by Angela
  116. washington state history

    if you were a native american where would you go to fish, what fishing techniques would use , and how would you cook and process the fish?

    asked by lisa
  117. physics

    a star has a mass of 2.0 10 30kg and a radius of 3.4*106m. what is its average density in kg/m3

    asked by christine
  118. washington state history

    explain the coastal indian ceremony called a potlach? how is this different than your birthday party?

    asked by lisa
  119. physics

    A long string is wrapped around a 6.2cm diameter cylinder, initially at rest, that is free to rotate on an axle. The string is then pulled with a constant acceleration of 1.9 m/s^2 until 1.0 m of string has been unwound. If the string unwinds without

    asked by Krista
  120. physics

    The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of

    asked by nuwan
  121. Physic

    If the specific gravity of ice is 0.92, what is the mass of one cubic meter of ice in grams?

    asked by Ty
  122. physics

    The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of

    asked by tharidu
  123. math

    Hi, I just want to make sure I am doing this right: Construct a relation on the set {a, b, c, d} that is a) reflexive, symmetric, but not transitive. b) irrreflexive, symmetric, and transitive. c) irreflexive, antisymmetric, and not transitive. d)

    asked by Confused!!
  124. Discrete Math

    a) Show that the relation R on Z x Z defined by (a , b) R (c, d) if and only if a + d = b + c is an equivalence relation. b) Show that a subset of an anti symmetric relation is also anti symmetric. c) Suppose that R is a symmetric relation on a set A. Is R

    asked by Confused!!
  125. chemistry

    a particle element has 2 isotopes in natural occuring mixture 47.8%of mixture is isotope weighing 150.9196 amu. The other weighs 152.9209amu. Calculate the atomic mass for this element show work

    asked by elanda
  126. physics

    The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of

    asked by tharidu
  127. Chemistry

    How many moles of NaOH per liter of solution would you expect to have in a solution that is labeled "0.105 M NaOH" on the side of the gradulated cylinder?

    asked by Carla
  128. PHI103

    Imagine someone asks you what you have learned in your logic class and what you found to be the most useful information you learned there. Is it important for people to study logic? What kinds of mistakes might they make without having been exposed to a

    asked by Ashley
  129. chemistry

    ewhat is the solubility of X in mol/dm3 if 25cm3 of its saturated solution contains 4.0g of X

    asked by emma4ever
  130. help!!!!!!!!!!!!!!!!

    what is 1 and 8 twentieths subtracted by 15 twentieths.i get you have to borrow.

    asked by Celest
  131. algebra

    Daniel drove a jet ski 60 mph for 2 hours. He made the same trip the next day with a current and it took him 1 hours. How many miles an hour was he going on the second day?

    asked by Jeanie
  132. statistics

    An expert witness in a case of alleged racial discrimination in a state university school of nursing introduced a regression of the determinants of Salary of each professor for each year during an 8-year period (n = 423) with the following results, with

    asked by ronald
  133. corporate finance

    Electronic Timing,Inc.

    asked by Wilbert
  134. math

    if one boy runs 2 3/5 miles a day for 4 days and another boy runs 10 miles in 4 days who runs further?

    asked by pat
  135. algebra

    if i had 100 dimes and quarters and the total value was $14.05, how many quarters would i have?

    asked by Marcy
  136. statistics

    (a) Plot the data on lightning deaths. (b) Describe the trend (if any) and discuss possible causes. (c) Fit an exponential trend to the data. Interpret the fitted equation. (d) Make a forecast for 2005, using a trend model of your choice (or a judgment

    asked by ronald
  137. geometry

    A triangle has vertices of Q(2,¨C3), R(4, ¨C4), and S(5, ¨C1). Give the coordinates of its image after a glide reflection containing a translation of (x, y) ¡ú (x, y + 5) and a reflection in the y-axis

    asked by Anonymous
  138. calculus

    At a quarry, sand is filling off a conveyor onto a conical pile at a rate of 15 cubic feet per minute. The diameter of the base of the cone is four times the height. At what rate is the height of the pile changing when the pile is 12 feet high?

    asked by peter
  139. earth

    How do Plate tectonics affect the Atmosphere, Hydrosphere, Geosphere, and Biosphere? Thanks SO much in advance!:D

    asked by Erika
  140. Chemistry help

    I am confused as to how to solve the below problem. I am not sure which formula to use. At first I thought I calculate the molar mass of NaOH, followed by calculating moles of NaOH. But I don't have the mass of NaOH to calculate moles. Do I convert 10mL to

    asked by Julie
  141. physics

    An objct of vol V is imersd in a lipd of dnsty P. Clclte d magnitde of buoynt frce actng on d objct due to d lg?? Plz yh qstn btado..

    asked by ilam
  142. math

    cheryl purchased 5 books for the same amount as Carla who purchased 3 books and a $8.00 briefcase. What was the cost of each book?

    asked by Donay
  143. to ms.sue

    can you show me step by step how you do did it?

    asked by Celest
  144. College Physics

    A 22 turn circular coil of radius 5.00 cm and resistance 1.00 is placed in a magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies in time according to the expression B = 0.0100t + 0.0400t2, where t is

    asked by Anand
  145. Basic Calculus-Relative Extrema

    Hello, please help me :) A question asked that I find all relative extrema of a function f(x)= x + 1/x. I'm a bit confused with my solution, but I'll show my work first..: I found f'(x) to get the critical numbers: f'(x)=1-x^-2 f'(x)=(x^2 -1)/x^2

    asked by mary
  146. math analysis

    how many faculty of each rank should be hired at each college to exactly meet the demand for sections and completely exhaust the salary budget Rank table. Lecture. Instrutor Section taught. 3. 4 annual salary. 20. 25 (Thousands $) Table. Community college

    asked by gracy
  147. 6th grade english

    In a mystery story, the conflict is given a new name. What is it? Climax, Resolution, Problem, or All of the above? My choice is problem, am I correct?

    asked by ☻i♥zee☻
  148. math

    solve quadratic equation x^4– 13x^2= -3

    asked by Anonymous
  149. Physics

    A projectile is launched with a speed of 35 m/s at an angle of 58° above the horizontal. Find the maximum height reached by the projectile during its flight by using conservation of energy. m

    asked by smh
  150. calculus-derivatives

    Hello, please help me, I'm studying for a test. :) I won't say the question because I'd like to figure it out myself or try first, but I'm looking for a simpler way to go about this. I have to find the derivative of h(x)= (x)(x-1)^1/3 I got: h'(x)=

    asked by mary
  151. English

    Could you please check these other sentences, please? Thank you. 1) I’ve just been on holiday with my family. I’ve just gone on holiday with my family. 2) My nephews did some pirates’ games. If you have just come back from your holiday: I was in

    asked by Matthew
  152. Chemistry

    What is the value of Kf for the formation of the ammine M(NH3)2+ ? Assume the concentration of M(NH3)n+ = 0.0020 M The data were graphed giving a straight line plot with an equation of y = -5.9484x - 9.74. .

    asked by Katie
  153. english

    what is the subject in the following sentece... these past three days have been quiet and enjoyable

    asked by shayne
  154. um...... STicky Situation

    Yow do you get super glue off your skin? I was doi9ng a project and it is stuck to my fingers. My step-sister is typing this because my hand is super glued. How do i get it off???

    asked by ☻i♥zee☻
  155. physics

    While trying to decide where to hang a framed picture, you press it against the wall to keep it from falling. The picture weighs 5.0 N and you press against the frame with a force of 6.0 N at an angle of 40 ° from the vertical. (a) What is the direction

    asked by tharidu
  156. CLC

    On a wet racetrack, the maximum safe speed, to avoid sliding on a level circular curve with a radius of curvature of 56 m, is 73 km/hr. What is the coefficient of friction between the car's tires and the track surface?

    asked by Jane
  157. english

    state the error and rewrite the sentence.who did max always want you to meet

    asked by rasheda
  158. science

    where can i get pictures of muscular energy and wind energy?

    asked by joken
  159. English

    Can you please check these sentences? I forgot to include them before. I really need to check them with you. 1) My family and I have been on holiday in (to?) Greece (he has come back from Greece). We stayed on (not in) Mikonos, a little island... 2) There

    asked by Matthew
  160. Algebra 2

    Identify all horizontal and vertical asymptotes of the graph of the function. f(x)=x^2/x^2-4 I know the vertical asymptotes are x=2 and x=-2, but how do I find the horizontal asymptotes?

    asked by Lynn
  161. maths

    S T 1 7 2 9 3 11 4 13 5 15 How do I write an equation to represent the function please I need you help.

    asked by miki
  162. Pre-algebra

    $1200 at 6% for 36 months

    asked by Cassandra
  163. algebra 2

    A doctor needs at least 60 adults for a medical study. He cannot use more than 40 men in the study. Write a system of inequalities to model the situation and solve the system by graphing.

    asked by Kinzie
  164. Chemistry

    A mixture of gases contains 0.4 mole of N2, 0.5 moles of O2, and 0.7 moles of H2. What is the total pressure if partial pressure of O2 is 1.3 atm?

    asked by HELP!!!
  165. art history

    How would you compare and contrast the northern and southern style temple?

    asked by melissa
  166. Alg2

    Hi! I'd like to know how to write the next term in the sentence & write a rule for the nth term. 1) 2/3, 3/6, 4/9, 5/12... I know the next term is 6/15 but I don't know how to write the rule for the nth term... 2) 1/3, 1, 5/3, 7/3,... I don't get this one

    asked by Lihn
  167. physics

    A roller coaster reaches the top of the steepest hill with a speed of 3.0 . It then descends the hill, which is at an average angle of 36 and is 50.0 long. Estimate its speed when it reaches the bottom. Assume friction coefficint Mk=0.18.

    asked by Mona
  168. math

    1.Transform the graph of f(x) = 3^x to sketch g(x) = 3^-(x+1) -2. Show table of values and each transformation clearly. 2.Write two equations to represent the same exponential function with a y-intercept of 5 and an asymptote at y = 3. Investigate whether

    asked by kk
  169. physics

    A ray of light in air strikes a glass plate (n = 1.50) at an incidence angle of 50 degrees. Determine the angles of the reflected and transmitted rays.

    asked by Darlene
  170. math

    1.Transform the graph of f(x) = 3^x to sketch g(x) = 3^-(x+1) -2. Show table of values and each transformation clearly. 2.Write two equations to represent the same exponential function with a y-intercept of 5 and an asymptote at y = 3. Investigate whether

    asked by kk
  171. pre-algebra

    thomas borrowed $4800 to buy a new car. he will be paying $96 each month for the next 60 months. find the simple interest rate for his car loan.

    asked by Cassandra
  172. Hamlet

    What are some motifs in Act IV? I read the entire act, but I still understand what the motifs are in this act? Any help?

    asked by Scarlet
  173. investment

    A bond currently sells for $1,250, which gives it a yield to maturity of 7%. Suppose that if the yield increases by 22 basis points, the price of the bond falls to $1,228. Required: What is the duration of this bond?

    asked by ben
  174. us history

    Roosevelt's New Deal differed from Hoover's administration in that the New Deal was willing to use government power to adjust the contending claims of major interests groups. !@#$%^& the validity of this generalization

    asked by henry
  175. Mura

    Could anyone help me with this question...Mecury has a density of 13.6g/cm^3 at 20°C.What would be the density of mecury at 100°C?

    asked by Abraham
  176. English

    I am currently writing my "Journey" Speech, does anyone know a quote from a famous person who has a quote about journey that is very inspiring and I can include at the end of my speech? Thank you...

    asked by Maby
  177. Maths

    Find error margin of 6.4

    asked by Thendo Oscar
  178. physics

    what is curie temperature?what is a fermi energy level?what is its position in case of an intrinsic semi conductor?what is a thermal neutron?what is its importance?

    asked by aalya
  179. English

    1. After you read the three friends' self-introductory passages, complete the following table. 2. After you take a look at the table summarized above, introduce one of/among the three friends to your classmates. (They are directions. Are they grammatical?

    asked by rfvv
  180. algebra

    making lemonade requires water and lemon juice in the ratio of 3 cups of water to 2 cups of lemon juice. You need a total of 10 allons for the fair. How many cups of lemon juice do you need?

    asked by Kevin
  181. math

    Find the value of each of the following. Leave your answers as fractions where appropriate. Do not change bases. a) log4 (1/8) B)10^(-10log3)

    asked by james
  182. physics

    At perihelion on Feb. 9, 1986, Halley’s comet was 8.79 × 107 km from the sun and was moving at a speed of 54.6 km s−1 relative to the sun. Calculate its speed (a) when the comet was 1.16 × 108 km from the sun, and (b) at its next aphelion in the year

    asked by swapnali
  183. physics

    a green bead of mass 70 g slides along a straight wire. The length of the wire from point "A" to point "B" is 0.700 m, and point "A" is 0.400 m higher than point "B". A constant friction force of magnitude 0.020 0 N acts on the bead. If the bead is

    asked by Hector
  184. algebra 2

    Factor the difference of two cubes: 5x^4y^2-40xy^5

    asked by amanda
  185. Calculus- please help

    Q. Find the minimum value of Q=x^2y subject to the constraint 2x^2+4xy=294. Its the derivative method.

    asked by Samantha
  186. math

    wat is 50% of 500?

    asked by john
  187. Chemistry

    The boiling point of ethanol is 78.5C and delta H vap = 40.5kJ/mol. Calculate the vapor pressure (in torr) of ethanol at 0.0C ?

    asked by Christina
  188. Algebra 1

    Factor completely 4x^3+x^2y-36x-9y

    asked by Alex
  189. physics

    I wanna know why when an object is fastened onto a point on a string,the tension in the different parts of the string are different?

    asked by kiba
  190. math

    $275 at 7.5% for 4 years?

    asked by linda
  191. chemistry

    35.00mL of 0.250M KOH solution is required to completely neutralize 10.50mL of H2SO4 solution. what is the molarity of the sulfuric acid solution KOH(aq)+ H2SO4 -------> K2SO4(aq) +H2O(l

    asked by brina
  192. Math


    asked by Shihara
  193. Math


    asked by Shihara
  194. science

    Identify one harmful activity that humans do that might change the percentage of water that is available as a resource? Predict the possible effects this activity could cause to the food chains in that area, the changes in the number and types of

    asked by Logan
  195. physics

    An object was launched with a velocity of 20 ms−1 at an angle of 45° to the vertical. At the top of its trajectory the object broke into two equal pieces. One piece fell vertically downwards. Where would the other piece fall? (Take g = 10 ms−2) (

    asked by swapnali
  196. physics

    An ice skater spins about a vertical axis at an angular speed of 15 rad s−1 when her arms are outstretched. She then quickly pulls her arms into her sides in a very small time interval so that the frictional forces due to ice are negligible. Her initial

    asked by swapnali
  197. chemistry

    Mr=112.11 and 0.146mg/mL how do I change thiss to mmol/L

    asked by LAURA
  198. Algebra 1

    solve if x=student price and y =adult price and 2y + 5x=77 and 2y + 7x=95 what are the price for admission for both adult and child

    asked by connie
  199. Hamlet

    What are some motifs in Act IV? All that spark-notes talks about is incest, hearing, and misogyny. None of those are in Act IV, at least not when I read through it AGAIN. Please I just need someone to tell me one main motif and I will look for it myself in

    asked by Scarlet
  200. physics

    The equation of transverse wave on a rope is y (x, t) = 5 sin (4.0t −0.02x) where y and x are measured in cm and t is expressed in second. Calculate the maximum speed of a particle on the rope.

    asked by swapnali
  201. 6th grade english

    What does a spectator do? thx for any and all help ☺☻♥♦☻☺

    asked by ☻i♥zee☻
  202. Chemistry

    Calculate the equilibrium constant for the following reaction at 100°C. 2 TiCl3(g)+2 HCl (g) = 2 TiCl4(g)+H2(g) ∆G°rxn = + 47.0 kJ mol-1 cant i just use K = e^ -Delta G/RT? --> K = e ^ -47.0 kJ mol-1 /(8.314)(273+100)? what is the point of having the

    asked by Katherine
  203. English

    I included the sentences I was most doubtful of. I hope you can clear my doubts. Thank you very much in advance. 1) My family and I have been on holiday in Greece. We stayed on a little island... There wasn't any wind. Unfortuanately I spent there only a

    asked by Matthew
  204. English

    Thank you very much, Writeacher. Here are some more things I wanted to include. 1) Can you help me organize the introduction to the project? I will also include a group photo of the participating students as well as photos of our school. 2) Once the

    asked by Matthew
  205. physics

    a green bead of mass 70 g slides along a straight wire. The length of the wire from point "A" to point "B" is 0.700 m, and point "A" is 0.400 m higher than point "B". A constant friction force of magnitude 0.020 0 N acts on the bead. If the bead is

    asked by Hector
  206. physics

    A 1,040-N crate is being pushed across a level floor at a constant speed by a force of 350 N at an angle of 20.0° below the horizontal; (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 350-N force is instead

    asked by kevin
  207. to ms.sue

    Lets say you had a book you bought at the book fair for $4.99. at a book order diouloge, there was a 10 book set for $27 with one of that book in it. what should you do with that book. I don't just want to give it away, I mean like I payed for it and my

    asked by Celest
  208. science

    How do the principles of physics and chemistry both come into play when developing new materials

    asked by long
  209. science

    What kind of chemical bonding(chemical elemants) occurs in bricks, elastic, and rope

    asked by long
  210. science

    The Kangzi dictionary compiled in China in 1710 during the Qing dynasty encompasses 46964 characters. How many bits would it take to specify a specific Kangzi character

    asked by long
  211. RES/341

    Should an organization create research testing for all problems confronting the business? Explain.

    asked by anita
  212. Math

    Find a unit rate for number of parts manufactured per hour if 1628 parts are made in seven hours round to the nearest integer

    asked by Sam
  213. Physics

    An Olympic diver performs a dive from the 10 m platform and achieves a speed of 14 m/s just before entering the water. Neglecting air friction, approximately how many times larger the diver’s speed than the diver would have achieved by performing from a

    asked by Timmy
  214. English

    I still have a few doubts. Can you please tell me if the sentences are all possible? Thank you 1) He cut his finger when he was slicing some bread. The surgeon gave him five stiches. The surgeon put five stiches in his finger. 2) The doctor put a cast on

    asked by Matthew
  215. Poetry, plz comment

    My fear: I'm sitting out here hoping and moping If only the rain Got rid of the pain And me being here would get rid of my fear My fear of cheer Some drown it in beer It may seem queer but its another fear 'Cuz I actually want a career And that wont happen

    asked by ☻i♥zee☻
  216. Genetics

    The difference between fitness of a given genotype and another genotype considered optimal is called the selection coefficient (s). What is the selection coefficient for a genotype (aa) that produces an average of 99 offspring when Aa individuals produce

    asked by Anon
  217. spanish

    I am writing an essai about what did i do during my vacation in barcelona !plz help

    asked by Anonymous
  218. Genetics

    A certain form of albinism in humans is recessive and autosomal. Assume that 1% of the individuals in a given population are albino. Assuming that the population is in Hardy-Weinberg equilibrium, what percentage of the individuals in this population is

    asked by Anon
  219. algebra

    Write an exponential function to model the situation. Then predict the value of the function after 5 years (to the nearest whole number). A population of 210 animals that increases at an annual rae of 19% Can you explain your answer please?

    asked by Christina
  220. Calculus

    Q. Find the minimum value of Q=x^2y subject to the constraint 2x^2+4xy=294. Its the derivative method.

    asked by help
  221. physics

    a 400 N woman is totally immersed in a water tank and displaces 0.0368 m^3 of water. what is her density in kg/m^3?

    asked by kerry
  222. physics

    A 0.23 kg ball of dough is thrown straight up into the air with an initial velocity of 12 m/s.Find the momentum of the ball of dough halfway to its maximum height on the way up.

    asked by Chris
  223. Calculus

    given f(x)=x-3 and g(x)=1/x-4 find the domain and range of the following functions f(x) f(g(x)) f(f(x))

    asked by Jessica Chaney
  224. math

    measure of angle 1 equals 3x and measure of angle 3 equals (7x-40)...... i don't get this

    asked by Anonymous
  225. Chemistry PLEASE HELP!!!!!

    Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. a. What would be the initial pH of Buffer C? HOW???????

    asked by Frank
  226. Calculus

    Find the following limits algebraically or explain why they don’t exist. lim x->0 sin5x/2x lim x->0 1-cosx/x lim x->7 |x-7|/x-7 lim x->7 (/x+2)-3/x-7 lim h->0 (2+h)^3-8/h lim t->0 1/t - 1/t^2+t

    asked by angie
  227. algebra

    At local community college, it costs $150 to enroll in a morning section of an algebra course. Suppose that the variable n stands for the number of students who enroll. Then 150n stands for the total amount of money collected for this course. How much is

    asked by Joyce
  228. English

    I urgently need to check these sentences for the last time. Thank you. 1) The doctor prescribed a nasal spray to be used (is TO USE a mistake??) three times a day. Incorrect: The doctor prescribed me OR to me a nasal spray ... 2) Why don't you take SOME

    asked by Matthew
  229. English

    I still have a few doubts, Writeacher. These are my last sentences. I really hope you can check them!! 1) I’ve just been on holiday to France with my family. (It means you have just come back?) I’ve just gone on holiday with my family. (I'm still

    asked by Matthew