Questions Asked on
June 5, 2017

  1. Science

    Consider a lead-acid battery with 500 Ah capacity and a rated voltage of 12 V. a)What is the total capacity of energy in watt-hours that can be stored in the battery? b)Assume that the battery is completely empty. The battery is now charging at a C-rate of

    asked by John
  2. Chemistry

    Find moles of O atoms in 9.00g of Mg(NO3)2.

    asked by ABC
  3. math

    what is the effective interest rate of an 8% 13-week treasury bill? assume it is a $10,00 treasury bill, and round to the nearest hundredth percent

    asked by karen
  4. trigonometry

    the angle of elevation of a tower at place A south of it is 30degrees and at B west of A and a distance of 50 from it the angle of elevation is 18degrees, determined the height of the tower

    asked by jack
  5. world history

    1. Imagine you work in a steel mill in a large industrial city in England in the late 1800s. You live in a neighborhood with other factory workers, and share the same living and working conditions they do. Write a letter to your representative in

    asked by jaime lynn
  6. Algebra

    Solve the following equation. Show all steps. x/x-2+x-1/x+1=-1

    asked by Anonymous
  7. geometry

    A 4​-ft vertical post casts a 20​-in shadow at the same time a nearby cell phone tower casts a 115​-ft shadow. How tall is the cell phone​ tower?

    asked by mike
  8. micro economices

    prove the profit maximization of the consumer i.e. mu=p, accordintg to cardinalist using mathmatical derivation.

    asked by seyoum
  9. Algebra

    Given that $x^n - \frac1{x^n}$ is expressible as a polynomial in $x - \frac1x$ with real coefficients only if $n$ is an odd positive integer, find $P(z)$ so that $P\left(x-\frac1x\right) = x^5 - \frac1{x^5}.$

    asked by Kei
  10. Math

    If two coins are tossed, what is the probability that the first coin will show heads and the second coin will show tails? a. 1/2 b. 1/4 c. 1/8 d. 1/16

    asked by Help I need somebody not just anybody
  11. Algebra

    Given that $x^n - \frac1{x^n}$ is expressible as a polynomial in $x - \frac1x$ with real coefficients only if $n$ is an odd positive integer, find $P(z)$ so that $P\left(x-\frac1x\right) = x^5 - \frac1{x^5}.$

    asked by Dave
  12. Chemistry

    A 0,518 g sample of limestone was dissolved and then the calcium was precipitated as calcium oxalate ( CaC2O4). Afer filtrating the precipitate, it was needed 40,0 ml of KMnO4 0,250 N acidified with H2SO4 to titrate it. ¿ What is the %w of CaO in the

    asked by Heydie
  13. Math

    The number of fish in a tank decreases by x% each year. Given that the number of fish halves in 8 years, work out the value of x. Give your answer to 1dp. (3marks) I've tried this question but am not sure of my answer. Could someone please go through it

    asked by Winter
  14. trigonometry

    a 60 meter high building is erected vertically on a hillside. An electric post stands vertically on the hill. An observer at the top the building, find the angle of depressions of the top and the bottom of the electric post to be 30 degrees and 42 degrees

    asked by jack
  15. math

    Select the equation in which the graph of the line has a positive slope, and the y-intercept equals -8. Question 1 options: x - 2y = 10 10x - 5y = 40 5x + y = 50 5x - 10y = -12

    asked by Pablo
  16. Physics

    A weightlifter raises a barbell of mass 150 kg from the floor to over his head 2.5 meters in 3 seconds. What is his average power input?

    asked by Aaron
  17. Science

    Reaction between potassium dichromate and sulphir dioxide gas?

    asked by Sahil lesnar
  18. Science

    Reaction between potassium dichromate and sulphur dioxide gas??

    asked by Sahil lesnar
  19. Physics

    due to conservation of mass, potential energy should always equal to kinetic energy. one possible reason the calculation for kinetic energy might be less than potential energy is _

    asked by Rene
  20. Math

    X^3+5x-4=0 Show this equation has a solution between x=0 and x=1. (The question is two marks)

    asked by Winter
  21. Washington state history

    Please help How did Inflation in the 1970s contribute to washington's. boom-and-bust cycles? A.It decreased unemployment in key industries. drove up the cost of consumer goods. increased wages for workers. spurred production in agriculture.

    asked by Cody
  22. Science, Chemistry

    Using chemical equations, write the chemical reactions for the following; photosynthesis, combustion, corrosion of iron.

    asked by Elle
  23. physics

    Block A (mass = 3 kg), moving at +5 meters per second, collides with stationary block B (mass = 4 kg). Block A comes to a sudden stop, while block B starts moving. What will be the approximate final speed of block B?

    asked by Rachel
  24. Innovation

    A car tire contains air at a pressure of 24 lb/in^2 at 0 degrees C. If the volume of the tire remains unchanged, what will the pressure be when the temperature has increased to 32 degrees C?

    asked by Jesse
  25. math

    What fraction of a square mile is a field that is 1/2 mile long and 1/4 mile wide?

    asked by bill
  26. algebra

    I am a 5 digit number, my tens digit is thee times the hundreds digit

    asked by francis
  27. Chemistry

    I have a question related to oxidizing agents. Why do some oxidizing agents have to be in acid medium? For example the potassium permanganate. I would also like to know if there are other examples of oxidizing agents that have to be in acid medium or where

    asked by Helen
  28. cpcc

    a small plane is traveling due south a t a velocity of 90 m/s. It suddenly encounters a tailwind of 27 m/s heading due south. what is The "air velocity" of the plan stays the same....but what is the resultant velocity (aka..."ground velocity") of the

    asked by sylvia
  29. Algebra

    Suppose that f(x) and g(x) are functions which satisfy f(g(x))=x^2 and g(f(x))=x^3 for all x ≥ 1. If g(16)=16, then compute log_2 of g(4). I'm not quite sure what to do here.

    asked by Kenma
  30. physics

    A block of mass m is pressed against a vertical wall with a force F acting at an angle theta. What are the maximum and minimum forces of F that can be applied and still have the block remain stationary?

    asked by Riley
  31. Algebra

    The function f:R⇒R satisfies xf(x)+f(1-x)=x^3-x for all real x. Find f(x).

    asked by Kenma
  32. Algebra

    Suppose we have the following identity: (px + (1-p)y)^2 = Ax^2 + Bxy + Cy^2. Find the minimum of max(A,B,C) over 0 \leq p \leq 1.

    asked by Oikawa
  33. English

    1. They moved in yesterday. 2. They moved out the day before yesterday. 3. They moved into yesterday. 4. They moved in the apartment yesterday evening. 5. They moved into the apartment yesterday evening. -------------------------- Are they all grammatical

    asked by rfvv
  34. physics

    A baseball traveling upward passes a window 29.0 m above the street with a vertical speed of 14.0 m/s. If the ball was thrown from street level, what is the maximum height that the baseball reaches? im completely stumped, this is a cram semester and my

    asked by Adam
  35. Physics

    A baseball traveling upward passes a window 29.0 m above the street with a vertical speed of 14.0 m/s. If the ball was thrown from street level, what is the maximum height that the baseball reaches? Im stumped, please tell me what equations to use as well

    asked by Adam
  36. English

    1. He passed the bakery and met one of his friends. 2. He passed a stream and became wet. 3. He passed a stream and found a bakery. --------------------------- In #2, he passed through a stream. What about in #3? Did he pass through a stream or not? Did he

    asked by rfvv
  37. Washington state history

    please help What about Washington’s post-World War II economy does the image represent? A.a change in focus to large businesses, science, and technology B.a change in focus to large businesses, science, and technology C.a decline in building and city

    asked by jacob
  38. math

    Select the equation in which the graph of the line has a positive slope, and the y-intercept equals -8. Question 1 options: 5x + y = 50 5x - 10y = -12 x - 2y = 10 10x - 5y = 40

    asked by Jay
  39. chemistry

    A sample of solid ammonia chloride NH4Cl, is dissolved in water...the solution found is acidic...explain why the solution is acidic?

    asked by cedrick
  40. 12

    i am confuse to prepare the buffer please tell me how to prepare the 0.02 M Sodium phosphate buffer, pH 6.9 with 0.006 M sodium chloride

    asked by Dayalu Naik
  41. math

    The equation (x + 6)^2 + (y – 8)^2 = 81 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals.

    asked by kenna
  42. Physics

    A marble is flicked straight up. It takes 2.3 seconds to reach its maximum height. How long does it take it to return to its original height. Assume there is no air resistance totally lost. if i had velocity, or some other variable i would know what to do.

    asked by Adam
  43. Maths

    Jack spends 1 3/5 as long on his homework as Jill. Last week, Jill spent 7 1/4 hours doing homework. How long did Jack spend doing homework?

    asked by Chloe
  44. English

    1. My dog spends most of the time at home. 2. My dog spends most time at home. (Are both the same?) 3. He got married to Susan in 2007. 4. He was married to Susan in 2007. (Are both the same? Does #4 mean 'action' or 'state'?)

    asked by rfvv
  45. Math

    Which events are NOT independent? 1.You toss three coins and get one head and one tail. 2.You choose three different ice toppings for a sundae. 3.You draw two colored pencils without replacement and get one red and one yellow. 4.You pull a yellow marble

    asked by Help I need somebody not just anybody
  46. Math

    Tony works in a factory that produces 1,000 computers each day. When 50 computers were sampled, it was found that 7 were defective. Estimate how many defective computers are made each day. 1. 140 2. 7 3. 4.

    asked by Help I need somebody not just anybody
  47. english

    Please could you check my grammar. thanks 1.Other Color Print Price, depending on the image’s size

    asked by jessie
  48. Physics

    How much time is needed to produce 840 joules of work if 100 watts of power is used?

    asked by Rene
  49. Maths

    A particle moves along a trajectory given by p(t) = . What is the particle's displacement during the time period t [1,3]? Do we just sub in t as appropriate (e.g. 6(1), (2+3(3) - 2(3)^2)? Or am I missing something here.

    asked by Hannelore
  50. chemistryt

    A solution with a volume of 1·00 dm3 is saturated with lead iodide, Pbl2. The concentration of iodide ions is 2·7 mol dm–3.Determine the solubility product of PbI2. 

    asked by sayan
  51. Eng Lit

    Why did Shakespeare make Juliet so young when compared to Arthur Brooke's and Matteo Bandello's original version of Romeo and Juliet?

    asked by Josie
  52. Maths

    Find the largest no that divides 630 and 940 leaving reminders 6 and 4 respectively

    asked by Isabella
  53. Socials 9

    what social values would have led jacques cartier to kidnap the sons of his iroquois hosg at the Gaspé Peninsula and take them to Europe?

    asked by Mike buttski
  54. math

    Brenda has taken out a $1300 loan to pay for a hot tub. She will make monthly payments for a year at an interest rate of 10 %, compounded monthly. How much interest will she end up paying? Select one: a. $213.45 b. $71.49 c. $112.56 d. $110.89 What i don't

    asked by Miyabi123456789
  55. English

    1. She is fond of scuba diving. 2. She likes scuba diving. 3. She is afraid of snakes. 4. She fears snakes. 5. She is aware of the fact. 6. She knows the fact. (Is each pair the same in meaning? Do you have some more expressions which have the same

    asked by rfvv
  56. Math

    A company has 100,000 subscribers. There are 3 types of subscription: a $99 version, a $350 version and a $1000 version. The first group gives 50% of the customers, the second gives 30%, and the third gives 20%. The average subscription expectancy is 1

    asked by julie
  57. Calculus II

    Express the integrated as a sum of partial fractions and evaluate the integral 3x2+x+9/(x2+5)(x-6)

    asked by Rosali
  58. Calculus II

    Evaluate the integral by first performing long division on the integrated and then writing the proper fraction as a sum of partial fractions. x^4/x^2-9

    asked by Rosali
  59. Science

    Hello, can anyone help me answer this question: What is the result of a silent mutation at a) DNA level b) amino acid level c) protein level d) phenotype level Thank you.

    asked by Aaron
  60. Chemistry

    Which of these will contain avogadro number of molecules: 1)22.4dm3 of co2 at 27∘c and 1atm contain 2)44g of at 27∘c and 1 atm 3)2.7dm3 of co2 at 546k and 2atm 4)11.2l of co2 at 273 and 2atm

    asked by Suhas
  61. math

    an icecream shop offers 5 different flavors of icecream and 12 different toppings. how many choices are possible for a single serving of ice cream with one topping? i chose 60 but i don't know if i'm correct. 12x5=60

    asked by mya
  62. Algebra 2

    What is the exact value of x? 5⋅84x=376 x=log75.2/4log8 x=4log8/log75.2

    asked by sammiexo
  63. Dynamics of rigid bodies

    a 500g ball traveling with a velocity of 5m/s strikes a vertical wall rebounds with a velocity of 4m/s Find a) change in pressure of the ball b) Joule of the collision

    asked by Vincy
  64. Dynamics of rigid bodies

    A 20 kg body moving at 30m/s is to be stopped by a constant retarding force of 100N. What is the impulse due to the force? How long must the force be applied?

    asked by Vincy
  65. Dynamics of rigid bodies

    A body of mass 300g is whirled in a horizontal circle by means of a 60cm long cord. If the cord can sustain a tension of 400N before, find the max. number of revolution per minute which the body can have

    asked by Vincy
  66. Math Help TIMED!

    write the polynomial in standard form then name the polynomial based on its degree and number of terms 10 g - 7 g^3 + 2g^2 - 5 a. -7g^3 + 2g^2 + 10g - 5 cubic polynomial b. -5 + 10g + 2g^2 - 7g^3 cubic binomial c. 7g^3 - 2g^2 + 10g - 5 quadratic binomial

    asked by Rob
  67. Dynamics of rigid bodies

    An airplane having a mass of 3000kg performs a vertical loop to loop maneuver at 400km/hr. What is the radius of the largest circular loop possible?

    asked by Vincy
  68. Dynamics of rigid bodies

    A conical pendulum consists of a 200g body at the end of a 40cm long string making 10degrees with the vertical Find a) Velocity of the body b) Tension in the string

    asked by Vincy
  69. Dynamics

    A curve along the highway is to be designed for cars moving at 100km/hr. Find the angle of banking if the radius of the curve is 200m

    asked by Vincy
  70. Maths

    Draw a right triangle having hypotenuse of length 5.6 cm and with one of the acute angles 30 degree.

    asked by Vijay
  71. math

    Draw a shape that exhibits rotational symmetry of order 3 and 1 line of symmetry.

    asked by Anonymous
  72. Business

    After defining the scope of the system, the next step is to: a) conduct a feasibilty study. b) determine requirements. c) form the project team?

    asked by Bria
  73. Algebra

    Suppose f(x) is a rational function such that 3f(1/x)+(2f(x)/x)=x^2 for all non-zero x. Find f(-2). I noticed that f appears as f(x) and f(1/x). That's probably important...

    asked by Tobio
  74. Chemistry

    How many moles of nitrate ions are present in 24.0mL of a 2.93M solution of potassium nitrate? I'm thinking this is some form of unit conversion problem I know that M= molarity which is mol/L how ever I am confused on how to set this up and input

    asked by Matthew
  75. Algebra

    Which set of ordered pairs is not a function?A. (4, –2), (–2, 2), (2, –2), (4, 2) B. (–4, 2), (–2, 2), (2, 2), (4, 2) C. (–4, 2), (–2, –2), (2, 2), (4, 2) D. (–4, –2), (–2, –2), (2, 2), (4, 2)

    asked by Britnee
  76. College Chemistry

    You have combined 1.218 moles of calcium ions and 0.943 moles of lithium ions in enough solvent to make 500.00mL of solution. What is the mole fraction of lithium ions in this solution? What type of problem is this and how do I set it up to solve?

    asked by Jacob