Questions Asked on
January 11, 2014

  1. Amaths

    prove sin(A+B)/sin(A-B)=(tanA+tanB)/(tanA-tanB)

    asked by Anonymous
  2. Geometry

    Stephanie casts a shadow of 1.2m and she is 1.8m tall. A wind turbine casts a shadow of 10m at the same time that Stephanie measured her shadow. Draw a diagram of this situation and then calculate how tall the wind turbine is.

    asked by Karen
  3. Physics

    Two uniform solid spheres have the same mass of 3 kg, but one has a radius of 0.25 m while the other has a radius of 0.8 m. Each can rotate about an axis through its center. (a) What is the magnitude τ of the torque required to bring the smaller sphere

    asked by Josh
  4. Chemistry

    What would be the temperature change if 3.0g of water absorbed 15J of heat?

    asked by Leena
  5. Honor's English

    Which of the following describes the underlined phrase in the sentence below? The local softball team won the championship (against all odds). A) prepositional B) participial C) gerund D) infinitive Process of elimination: It cannot be C since a gerund

    asked by Ben
  6. algebra

    An exam consists of two parts, Section X and Section Y. There can be a maximum of 95 questions. There must be at least 20 more questions in Section Y than in Section X. Write a system of inequalities to model the number of questions in each of the two

    asked by helen
  7. English

    Which of the following is a phrase fragment? A) Since the weather forecast is beautiful this weekend. B) Let's ask our parents if we can go tubing. C) Did you just say that? D) A great dog, that’s what we have! I can't determine if it's A or C.

    asked by Tyto
  8. math

    Zoe, Minh, and Jake sold some tickets for a school fundraiser. Each ticket cost $2. Zoe sold 1/2 of the tickets. Minh and Jake sold the remaining tickets in the ratio 1:3. If Zoe sold 36 more tickets than Minh, how much money dis the 3 students collect

    asked by Dariel
  9. Atomic Model/Science

    A particular neutral uranium atom has 92 protons,143 neutrons, and an atomic mass of 235. How many electrons does the atom have?

    asked by Mileena
  10. Statistics

    Students are being surveyed about the weight of books and supplies they are carrying as they attend class. a. Identify the variable of interest b. Identify the type of variable c. List a few values that might occur in a sample

    asked by Rosemarie
  11. Pre-Calculus

    Solve sin (pi/4(x-6))=0.5, 0

    asked by Hanu
  12. algebra

    use the binomial theorem to expand the binomial (s+2v)^5

    asked by helen
  13. Physics

    A train traveling at a speed of 110 km/h uniformly decelerates for 20 seconds. During that time it travels 450m. A) What is the acceleration? (m/s^2) B) What is its speed after deceleration? (km/h) A ANS = -.805m/s^2 B ANS = 52km s = 450m t = 20 seconds u

    asked by Danny
  14. Science

    Which of the following would not be affected by a loss of vacuole function? The export of unwanted substances The production of ATP>>>>>>? The regulation of cellular pH The storage of food materials

    asked by Tina
  15. Calculus

    The following table displays the number of HIV diagnoses per year in a particular country. Year 1997 1998 1999 2000 2001 2002 2003 2004 2005 Diagnoses 2512 2343 2230 2113 2178 2495 2496 2538 2518 a) Using Curve Expert or another curve modelling program,

    asked by amy
  16. Science

    The bacterium Caulobacter crescentus is able to form long cell envelope extensions that increase the surface area-to-volume ratio when placed in adverse environments. What is the likely function of these envelope extensions? To acquire nutrients To aid in

    asked by Tina
  17. Science

    Which of the following best describes an aspect of a membrane's molecular structure that causes it to be selectively permeable? Carrier proteins on either side of the membrane slow the traffic of large molecules into the cell. Nonpolar molecules cannot

    asked by Tina
  18. physics

    A small cube of mass m1= 1.0 kg slides down a circular and frictionless track of radius R= 0.4 m cut into a large block of mass m2= 4.0 kg as shown in the figure below. The large block rests on a horizontal and frictionless table. The cube and the block

    asked by Garry
  19. algebra

    Identify a pattern and find the next number in the pattern -0.8,-3.2,-12.8,51.2

    asked by helen
  20. maths

    A large pipe has a diameter of 9.8×10^2cm.Water flows in the pipe at a speed of 5m s^-1.Find the volume in m^3,of water that flows out from the pipe every second,correct to 2 significant fogures.[Take pai as 3.142]

    asked by ashley
  21. physics

    A pelican flying along a horizontal path drops a fish from a height of 4.3 m. The fi!@#$%^&ravels 8.3 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of

    asked by sabrina
  22. math

    If the area of a circle increases by a factor of 9, by what factor does its circumference increase ?

    asked by Thomas
  23. chemistry who helps me step by step

    25g of a sample of ferrous sulphate was dissolved in water containing dilute h2s04 and the volume made up to one litre. 25ml of this solution required 20ml of N/10 kmn04 solution for complete oxidation. calculate the percentage of fe204 7h20 in the sample.

    asked by Fai
  24. Amaths

    prove tanA+tanB=sin(A+B)/cosAcosB

    asked by Anonymous
  25. Physics

    The gravitational force of attraction between two students sitting at their desks in physics class is 2.35 ✕ 10-8 N. If one student has a mass of 46.2 kg and the other student has a mass of 62.6 kg, how far apart are the students sitting?

    asked by Anonymous
  26. PHYSICS(HELP)

    A pendulum of mass m= 0.8 kg and length l=1 m is hanging from the ceiling. The massless string of the pendulum is attached at point P. The bob of the pendulum is a uniform shell (very thin hollow sphere) of radius r=0.4 m, and the length l of the pendulum

    asked by Anonymous
  27. math

    A right circular cylinder is to be inscribed in a sphere of given radius. Find the ratio of the height to the base radius of the cylinder having the largest lateral area.

    asked by Jus
  28. Science

    Are Mosquito Larvae decomposers?

    asked by Anonymous
  29. physics

    The resistance of a platinum resistance thermometer is 30 ohms at the ice point, 40 ohms at the steam point and 34.5 ohms on a certain hot day, what is the temperature of the day on celcius temperature day?

    asked by dayo
  30. reading

    Through the tunnel by Dory Lessing 2 questions? 1. Richard and Jerry share similar character traits. Identify two ways these boys are quite similar. Use details and examples from the text to support your inferences. 2. both narrative selections selections

    asked by lilan smith
  31. physics

    Pls help me with this, The resistance of a platinum resistance thermometer is 30 ohms at the ice point, 40 ohms at the steam point and 34.5 ohms on a certain hot day, what is the temperature of the day on celcius temperature day?

    asked by dayo
  32. Ashford

    Once they arrived in the United States, immigrants experienced a life very different from what they imagined. Which was not something that was most immediately part of their experience?

    asked by Nana
  33. Chemistry

    25g of a sample of ferrous sulphate was dissolved in water containing dilute h2s04 and the volume made up to one litre. 25ml of this solution required 20ml of N/10 kmn04 solution for complete oxidation. Calculate the percentage of f2s04 7h20 in the sample

    asked by Ken Hung
  34. Physics

    Tarzan tries to cross a river by swinging from one bank to the other on a vine that is 11.6 m long. His speed at the bottom of the swing is 7.4 m/s. Tarzan does not know that the vine has a breaking strength of 1.0 ✕ 103 N. What is the largest mass that

    asked by Anonymous
  35. physics

    The resistance of a platinum resistance thermometer is 30 ohms at the ice point, 40 ohms at the steam point and 34.5 ohms on a certain hot day, what is the temperature of the day on celcius temperature day?

    asked by dayo
  36. biology

    Given below is the sequence of the mRNA ready for Translation" 5' - AUG CUA UAC CUC CUU UAU CUG UGA - 3' a) what is the first codon technically known as and which amino acid does it code for? b) how many amino acid residues will make the polypeptide chain

    asked by Sharon
  37. Chemistry

    Assuming that seawater has a total ion concentration (aka colligative molarity) of 1.10 M conc, calculate how many liters of seawater are needed to produce 68.7 L of fresh water at 20 C with an applied pressure of 51.0 bar.

    asked by Michael Stoll
  38. science check my answers?

    A car travels around a circular turn of radius 50 meters while maintaining a constant speed of 15 m/s. Find the minimum value for the coefficient of friction necessary to keep the car on the road. I got .40 for the minimum value of friction. In icy

    asked by Ryan
  39. math

    Rewrite the equation 4x + y + 2 = 0 in slope-intercept form.

    asked by Alex
  40. Science

    Ms.Sue would you mind checking my answer? Question~ What make sit possible for plants to complete photosynthesis? _________________________________________ My Answer~ For plants to complete photosynthesis they need water,carbon dioxide and light.

    asked by Anonymous
  41. maths

    The scale of a map is 1:25000.Find the actual length of a road,in cm,which is measured 7.8 cm on the map.Express the answer in standard form.

    asked by ashley
  42. Physics Please check my answer

    1. Which of the following are conserved in a totally inelastic collision? Only momentum Only kinetic energy Both momentum and kinetic energy Neither momentum nor kinetic energy

    asked by unknown
  43. 8gradescience

    Which is not a way to accelerate an object? a. speed it up b. slow it down c. change its direction d. apply balanced forces

    asked by mathidislikeperson
  44. 8th Grade Algebra

    Taylor's front porch is rectangular. The length is 3 feet more than the width. The perimeter of the porch is 14 feet. What is the width of the porch?

    asked by Kayleen
  45. Pre-Calculus

    Here is correct question: Solve sin (pi/4*(x-6))=0.5, 0

    asked by Hanu
  46. Physics

    dT/dz=−α for z≤11 km where α=6.5 K/km (Kelvin per km) and z is the height above the sea level. The temperature stays then approximately constant between 11 km and 20 km above sea level. Assume a temperature of 5 ∘C and a pressure of 1 atm at sea

    asked by Anonymous
  47. physics

    Under what circumstances does a double convex lens produce an image that is reversed left to right?

    asked by Lane
  48. math

    Use synthetic division to find the quotient and remainder. (r^2-2r+2), (r-1)

    asked by Sam
  49. Accounting

    The total assets of Capp Co. are $600,000 and its liabilities are equal to two-thirds of its total assets. What is the amount of Capp Co.’s owner’s equity?

    asked by Ronald
  50. statistics

    . Consider a football team for whom the numbers on the active players’ jerseys are 29, 41, 50, 58, 79, and 10, (listed in order of the players’ names). Does it make sense to calculate the means of those numbers? Why or why not?

    asked by Anonymous
  51. math

    Andrew has $2.75 in nickels and quarters in his coat pocket. If he has a total of 15 coins, which system of equations could you use to find the number of quarters in Andrews coat pocket? 1)x+y=15 0.5x+0.25y=2.75 2)x+y=2.75 x+y=15 3)x+y=15 0.05x+ 0.25y=2.75

    asked by B8
  52. business plan

    how do you explain the process and surrounding environment for the operational plan. I have a cleaning service

    asked by nicey
  53. PHYSICS

    dT/dz=−α for z≤11 km where α=6.5 K/km (Kelvin per km) and z is the height above the sea level. The temperature stays then approximately constant between 11 km and 20 km above sea level. Assume a temperature of 5 ∘C and a pressure of 1 atm at sea

    asked by Anonymous
  54. math

    What is the solution to x+5+x+1+x=3(x+2)+1 1)x=0 2)x=3 3)no solution 4) infinite I got #3 no solution x+5+x+1+x=3(x+2)+1 x+5+x+1+x=3x+6+1 3x+6=3x+7 -3x -3x 6=7 so no solution Is this correct? Thanks for checking over my work.

    asked by B8
  55. 8.01x Classical Mechanics

    Sliding Blocks (14 points possible) A small cube of mass 1.0 kg slides down a circular and frictionless track of radius 0.6 m cut into a large block of mass 4.0 kg as shown in the figure below. The large block rests on a horizontal and frictionless table.

    asked by Anonymous
  56. maths

    The total population of the earth was estimated to be 6.42 billion people.Given that the total land surface area of the earth is about 1.5×10^8km^2.Find the average number of people living in 1 km^2 of land on earth,correct to 2 significant figures.Thanks

    asked by ashley
  57. Chemistry

    How is the high performance liquid chromatography column designed to ensure greater efficiency?

    asked by Yu
  58. Chemistry

    How can reaction intermediates in an organic synthesis be separated and recovered using thin layer chromatography?

    asked by Yu
  59. Early child hood

    what is formative assessment of progress

    asked by pat
  60. science

    Is a bluegill both a decomposer and consumer?

    asked by Unknown
  61. math

    solve algebraically and check y=8x+3 y=-4x-21 8x+3=-4x-21 +4x +4x 12x+3=-21 -3 -3 12x=-24 x=-2 y=8x+3 y=8(-2)+3 y=-16+3 y=-13 (-2,-13) check y=8x+3 -13=8(-2)+3 -13=-16+3 -13=-13 y=-4x-21 -13=-4(-2)-21 -13=8-21 so -13=-13 these check, so did I do this

    asked by B8
  62. Science

    How does gravity keep the planets in motion around a star?

    asked by Anne
  63. Literature Essay (Writeacher)

    Writeacher, I truly need your help. I must finish this essay tonight but I am struggling. I read my thesis statement along with the first body paragraph, but it doesn't correspond whatsoever! I think I may need to rewrite the entire first paragraph. I

    asked by Victoria
  64. Math

    y=1/2x+3 Slope? x-intercept y-intercept How do I graph this?

    asked by jena
  65. Chemistry

    Draw condensed structural formula for... 2,3-dichloropropanoic acid

    asked by Anonymous
  66. Physics Please check my answer

    Okay, so I've figured this much out on my own, I just need help with the next part. It's a two block system with a friction of .20 a hanging mass of 7.5 kg and mass on the table at 10 kg. I got 3.08 m/s^2 for the acceleration and I got 22.8 N for the

    asked by unknown
  67. math

    what is 6/18 converted to a decimal?

    asked by Shohanur
  68. Stuck on this Algebra 2 question!

    what is the solution of the system of equations? 2x+2y+3z=-6 3x+5y+4z=3 2x+3y+4z=-10

    asked by Heather
  69. science please check my answer

    A boy climbs to the roof of his house and drops a 0.40 kg rubber ball from the 7.5-meter peak of the house. How much energy was lost in the process? So I got 48 J is this correct? The bounce takes place over a 170 ms time interval. What is the impulse

    asked by Katie
  70. writing

    Emma is a leader in (who, whom) we have great confidence.

    asked by Anonymous
  71. Math

    Compute the Annual Percentage Yield (APY) for the investment in the previous question. (Round APY to the nearest hundredths of a percent.)

    asked by Bonnie
  72. Math

    The radiator of a car contains 20 liters of water. Five liters are drained off and replaced by antifreeze. Then 5 liters of the mixture are drained off and replaced by antifreeze, and so on. This process is continued until six drain-offs and replacements

    asked by Gregg
  73. Statistic

    Consider a football team for whom the numbers on the active players’ jerseys are 29, 41, 50, 58, 79,…, 10 (listed in alphabetical order of the players’ names). Does it make sense to calculate the mean of those numbers? Why or why not? 2. The Fair

    asked by Lori
  74. Math

    the length of a rectangle is seven less than four times the width. Find the length if the area is 65 square units.

    asked by Anna
  75. Science

    Would Mosquito Larvae be considered an insect?

    asked by Anonymous
  76. NEUROSCIENCE

    freepdfhosting[dot]com/b75c984836.pdf replace " [dot] " with a period. HELP?

    asked by Billy Jameson
  77. Algebra

    I need help understanding algebra

    asked by Jackie
  78. writing thesis statments

    I am stuck on what would be a good thesis statement for my topic of, " How does drug addiction affect America as a whole?

    asked by ashley
  79. Math

    Select the x-coordinate of the vertex of the parabola defined by the function f(x) =-5x^2+7x+8

    asked by Kate
  80. young child

    A child have not learn the prerequisite fundamentals need for a combination of motor patterns is suffering from what

    asked by sherry
  81. Fifth grade math

    If a wom and a sail race who will it be

    asked by Doodle
  82. law

    What recent court cases have been decided on the right to keep and bear arms?

    asked by mike
  83. A Peculiar Question

    In what ways are people more fearful than people in past generations?

    asked by Victoria