Questions Asked on
January 18, 2015

  1. physics

    A model rocket is launched straight upward. Its altitude y as a function of time is given by y=bt−ct2, where b = 80m/s , c = 4.9m/s2 , t is the time in seconds, and y is in meters. 1. Use differentiation to find a general expression for the rocket's

    asked by Anonymous
  2. physics

    An object is moving in the x-direction at 1.1m/s when it undergoes an acceleration a⃗ =0.56j^m/s2. Find its velocity vector after 4.8s . Express your answer as a comma-separated pair of components. Express your answer using two significant figures

    asked by Anonymous
  3. History

    what are two themes that would be appropriate for thematic time lines of important events from prehistory to A.D.1600.

    asked by sara
  4. chemistry

    Use this article to answer questions about mass spectrometry and how it was used to identify lead isotopes in the air around Mexico City. Determination of Particulate Lead Using Aerosol Mass Spectrometry: MILAGRO/MCMA-2006 Observations (Ok I read the

    asked by Morgan
  5. Physics II

    A large cylindrical water tank 11.5 m in diameter and 13.5 m tall is supported 8.75 m above the ground by a stand. The water level in the tank is 10.6 m deep. The density of the water in the tank is 1.00 g/cm3. A very small hole is formed at the base of

    asked by Lindsay
  6. maths

    Mike asks Billy to help him run his lemonade stand. He’ll either pay him 2/5 of ½ of the stand’s profits, or 1/3 of ¾ of the stand’s profits. Which should Billy choose to maximize the amount he will earn, and by what amount will his earnings be

    asked by aradhna
  7. Chemistry

    Iron 3 hydroxide reacts with acetic acid to form iron 3 acetate and water. If 45.4g of water are formed,what mass of iron 3 acetate will be produced? •Fe(OH)3+3HC2H3O2--->Fe(C2H3O2)+3H2O 45.4H2O( ? Fe(C2H3O)) ---------------------------------------- ( ?

    asked by G
  8. physics

    You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2.

    asked by Anonymous
  9. Civics

    Which of the following is true about laws in the united states? They are made by the police The forbid or require certain actions*** They are invalid unless every citizen has voted to accept them They prevent criticism of the government.

    asked by jeje
  10. Civics

    How would you categorize the obligations and services of state and local governments as compared to those of the federal government? State and local governments provide, useful services, while the federal government tends to provide unnecessary services.

    asked by jeje
  11. Algebra HELP!!

    Water coming out from a fountain is modeled by the function f(x) = -x^2 + 8x + 2 where f(x) represents the height, in feet, of the water from the fountain at different times x, in seconds. What does the average rate of change of f(x) from x = 1 to x = 4

    asked by Dina M
  12. physics

    A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.

    asked by Anonymous
  13. Math

    A students tuition was 2800. A loan was obtained for 5/7 of the tuition. How much was the loan

    asked by Dominique
  14. physics

    A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.

    asked by Anonymous
  15. Chemistry

    A sealed container comtains 1.50 mol of nitrogen gas, 2.00 mol of oxygen gas and 3.50 mol of argon gas. If the total pressure is 900 kPa, what is the pressure of the nitrogen gas?

    asked by Sandy
  16. Theory of machines

    A locomotive is running at a constant speed of 100 km/ h. The diameter of driving wheels is 1.8 m. The stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin relative to the engine

    asked by Rahul
  17. Physics

    The earth has about 80 times the mass of the earth’s moon. The gravitational force exerted on the moon by the earth has what relation to the gravitational force exerted on the earth by the moon? 1. the same as 2. zero; the earth exerts a force on the

    asked by Tiffany
  18. Mathematics arithmetic sequence

    The sum of second and sixth terms of an arithmetic sequence is 4. The third term is 24 more than eleventh term. So determine the first three terms of the sequence.

    asked by Mirriam
  19. Chemistry

    Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M Ti3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced

    asked by James
  20. physics

    You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2.

    asked by Anonymous
  21. chemistry

    A 6.00 L balloon contains helium at SATP at ground level. What is the volume when it floats up to an altitude where the temperature is 10.0 degrees C and atmospheric pressure is 91.5 kPa

    asked by Rose
  22. Pre Calculus

    At a glassware factory, molten cobalt glass is poured into molds to make paperweights. Each mold is a rectanglar prism whose height is 3 inches greater than the length of each side of the square base. A machine pours 20 cubic inches of liquid glass into

    asked by Nadia
  23. Arithmetic

    The Gardiner dam located 100 km south of Saskatoon is largest earth filled dam in the world. Upon it's opening in 1967, engineers discovered that the pressure from lake deifenbaker had moved the clay based structure 200 cm downstream. Since then, then the

    asked by hinata
  24. Business English

    Identify and correct the errors in the following to create parallel structure: To narrow a web search a. Put quotation marks around a phrase when you want an exact term. b. Many search engines have wild cards (usually an asterisk) to find plurals and other

    asked by Nate
  25. math

    The sum of first 12 terms of an arithmetic series is 186, and the 20th term is 83. What is the sum of first 40 terms?

    asked by josh
  26. Civics

    To which major cultural region should you move if you want t be close to large cities and most famous universities? Midwest*** Northeast South West Fast Please!!

    asked by jeje
  27. algebra

    In a survey of a TriDelt chapter with 50 members, 20 were taking mathematics, 32 were taking English, and 6 were taking both. How many were not taking either of these subjects?

    asked by jeanette
  28. Civics

    Henry is developing a plan of action to resolve a local issue in his community. Which of the following actions would be best for Henry to complete first? Making a long list of alternatives Learning as much as he can about the issue *** Making public

    asked by jeje
  29. Civics

    When conducting a stakeholder analysis, a group identifies the individuals or groups affected by a proposal action. A citizen group wants to open a new youth center in a location currently zoned for light residential use. The group is required to perform a

    asked by jeje
  30. Art

    define two color schemes that a color wheel could help you identify.

    asked by Sara
  31. Statistics

    An instructor asked students to name their favorite color. An appropriate graph to display the data is a... A) histogram B) pie chart C) time plot

    asked by Macy
  32. Calculus

    1. The radius of a sphere is expanding at a rate of 14 in/min. a) Determine the rate at which the volume is changing when the radius is 8 in. b) Determine the rate at which the surface area is changing when the radius is 8 in. 2. A particle moves along a

    asked by Anonymous
  33. Physics

    A cannon is fired at 30 degrees above the horizontal with a velocity of 200 m/s from the edge of a 125 m high cliff. Calculate where the cannonball lands on the level plain below.

    asked by Sean
  34. maths lit, life sciences, history, goegraphy

    I'm in grade10 and I'm doing does subjects I just wonder wich job can I get when I do does subjects???

    asked by Toby
  35. Civics

    Which quotation(s) from the united states constitution provides for a federal; system of federal government? Statement I:- "The … Manner of Elections for Senators and Representatives shall be prescribed (will be decided by ) each state Legislatures; but

    asked by jeje
  36. Math

    If f (x)=x+2 , g(x)=-4x+3, and h(x)=x^2-2x+1, find each value. 1. (f x g x h) (3) 2. (h divided by fg) (-6) 3. [ g o ( h o f)] (-4) If f(x)=5x , h(x)=x^2+6x+8 , solve f[h(a+4)]

    asked by Stacey
  37. Physics

    An automobile travels a distance of 12 km in 4 minutes. It then moves the next 12 km in 2 minutes. Please help me to calculate its acceleration which is constant throughout the motion. Thanks in advance ))))

    asked by Aiko
  38. Maths

    Consider the sequence 13;11;9;7;5... A) show that Tn+T15-n=0

    asked by Takalani
  39. Math

    Hi Ms. Sue can you let me know if my answers are right? Anyone who can help check my answers will be greatly appreciated! Thank you! My answers are the ones with the *** after them. 1. –9x – 5 = –95 a. 17 b. 11 *** c. 10 d. –10 2. w over four – 4

    asked by BlueSkies
  40. physics

    Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.

    asked by Anonymous
  41. Chemistry

    Use molar gas volumes to convert the following gas volumes to amount in moles. A) 1.5 L of carbon monoxide gas at SATP B) 21.5 L of fluorine gas at STP

    asked by Cutter
  42. Physics

    A old Chevy accelerates at a rate of 3.8 m/s^2. How much time would it take to reach the speed limit of 100 km if the car was travelling at the speed of 70.0 km? a) 2.9 s b) 3.7 s

    asked by Lucina
  43. Physics

    A 50 g lunch pail is lifted up 500 m. If the work required to do this was 1450 J, what's the acceleration? W= mad 1450 = (0.05 kg)(a)(500m) 1450 = 250a 5.8 m/s^2 = a If a 750 g mass is accelerated at a rate of 11.0 m/s^2 for a distance of 3.0 m, how much

    asked by Lucina
  44. math

    A family has an annual income of 28800. Of this 1/4 is spent for food, 1/5 for housing, 1/10 for clothing, 1/9 for savings, 1/4 for taxes, and the rest for other expenses. How much is spent for housing?

    asked by Dominique
  45. Career

    Of the following career paths, which is NOT likely to have an apprenticeship program? Electrician Carpenter Accountant Fire Fighter What is the main difference between a college and a university? Only universities offer 4-year degree programs Only colleges

    asked by 2phoneeeeee
  46. Chemistry

    What will the pH be if 15 mL of 0.1 M HCl are added to the buffer obtained by mixing 70 mL of 0.5 M CH3NH2 and 30 mL of 1.0 M CH3NH3+Cl-? (Kb for CH3NH2 is: 5.2 x 10-4 ) I'm having a hard time figuring out what to do first. is the ICE table come in handy

    asked by Maria
  47. English

    How would I answer this? I am so sorry, but I just can't afford to have you finish the job. My largest wholesaler just went out of business and I don't know what to do. That was my biggest client, so I am not sure if I can afford to expand. I wish you had

    asked by S.A.M
  48. chemistry

    Under SATP, magnesium was reacted with acid and 500 ml of hydrogen gas was collected over water. A) what is the vapor pressure of water? B) What is the pressure of the hydrogen gas? C) What amount of hydrogen was produced? I only know how to do the law of

    asked by kiersten
  49. Chemistry

    Why is the carbonate solution boiled before titrating?

    asked by Candice
  50. Algebra

    Simplify the radical expression square root 48a squared b to the 7th all beneath the sq rt sign I have no work to show, can't remember the steps to solve

    asked by Karen
  51. Physical science

    Is a chemical reaction the same as a chemical change i need to know so that i can plug it in to answer a question

    asked by Sonnie
  52. algebra

    a car rents for $45 per day plus 21 cents per mile you are on a daily budget of $66 what milage will call you to stay within your budget

    asked by barbara
  53. Algebra 1a

    Will someone please help me with the answer to the following: Simplify: (xy)^-3/(x^-5y)^3

    asked by Kim
  54. Algebra 1a

    Will someone please help me with the answer to the following: Simplify x^2*x^3*x^4 Thanks!

    asked by Kim
  55. algebra

    From a survey of 100 college students, a marketing research company found that 70 students owned iPods, 50 owned cars, and 40 owned both cars and iPods. (a) How many students owned either a car or an iPod (but not both)?

    asked by jeanette
  56. Civics

    "__________ should be upheld by all political parties. They would neither advise others to break the law, nor encourage others to do so even when the strongly disagree with the legislation put forward by the government of the day.' Which phrase or term

    asked by jeje
  57. algebra

    Montgomery College has a 64-piece band and a 35-piece orchestra. If 14 people are members of both the band and the orchestra, can the band and orchestra travel in two 45-passenger buses?

    asked by jeanette
  58. Civics

    Which of the below concepts most closely relates to reserved powers, delegated powers, and concurrent powers? Shared powers*** The amendment process Judicial review Federalism

    asked by jeje
  59. Civics

    What must be true of a bill which has become law at a federal level? It must have been signed by the president It must be in the best interest of all Americans It must have passed both the house and the senate*** It must have been introduced into the

    asked by jeje
  60. Civics

    In the case The Senate Of Tennessee V. John Thomas Scopes, high school biology teacher John Scopes was accused of teaching content that violated a Tennessee law that stopped public school teachers from teaching evolution. Scopes voted this law , but felt

    asked by jeje
  61. Social Studies

    What immediate impact did European colonization have on Caribbean South America?

    asked by Taryn S.
  62. Statistics

    When ordering vinyl replacement windows, the following variables are specified for each window. Which of these variables is quantitative? A) window style- double hung, casement, or awning B) window style- single pane or double pane C) area of the window

    asked by Macy
  63. Statistics

    A survey or college students collected information on several variables: distance from home, age, major, gender, and class. The variable major is A) neither categorical nor numerical B) categorical C) quantitative Please help :)

    asked by Macy
  64. French

    Is "vieil homme" or "homme vieil" correct? I think it is the former because it describes age.

    asked by Anonymous
  65. Civics

    You are governor Of Florida, and you are considering running for president of the united states. What may you be able to do as governor they you will be unable to do as president? Require information in writing of executive officers Appoint a justice to

    asked by jeje
  66. algebra

    Sam jumped off a diving board into a pool her height as a function of time is modeled by the function h (t)=-20 to the second power+20t+16 where t is time in seconds h is height in feet how long did it take sam to reach her highest height what is the

    asked by Jackie
  67. Civics

    Teachers, doctors, and lawyers need professional licenses in order to perform their jobs legally. Who has the authority to issue these licenses? School boards Congress The state government*** City police

    asked by jeje
  68. physics

    As a warm-up for their juggling act, two clowns are tossing balls straight up in the air and catching them. While following the balls with his eyes, Joey says, ”Isn’t it strange how they just stand still in the air for a moment before they fall back

    asked by Angy
  69. To Devron

    Since you are a biochemist please look at the post below by C. I tried answering the question but I really don't understand the question. Perhaps you can help.

    asked by DrBob222
  70. Federal Gverment

    What is a example of service provided by federal government?

    asked by jeje
  71. English/Jargon

    Can some help me revise this sentence to eliminate jargon and use short familiar words? I just need to see how one is done so I can complete the rest of the questions myself. With regard to the aforementioned letter of July the 15th we expect to expedite

    asked by Leilani
  72. Health/Brain Tumors

    If you have a brain tumor and it grows, can it make you lose your ability to walk?. It causes pressure/irritate something I believe

    asked by Tito
  73. PED 212

    During which stage of play where a child is no longer concerned about what other children are doing?

    asked by Monica
  74. Mathematics

    A car travelling at an average speed of 55kph leaves Town A for Town B a distance of 120 kilometres. At the same time, another car, travelling on the same highway at an average speed of 45kph, leaves Town B for Town A. In how many leaves will they meet?

    asked by Kyrstal
  75. Alcohols,phenols&ethers

    How2 convert CH3OH into CH3CH2OH

    asked by Anonymous
  76. chemistry

    calculate the volume of oxygen at 15 degree Celsius and 745mmHg pressure. which could be obtained by heating 10g of potassium trioxochlorate(v)

    asked by Henshaw Michael
  77. Physics

    the coefficient of friction between block A and the horizontal surface is 0.43. What must be the weight of the hanging block B if this block is to descend at constant speed once it has been set into motion? Mass of block A is 5.0 kg

    asked by Anonymous
  78. Math

    If w is some number between 3 and 10, which of the following could be the average of the numbers 4,5,6,7,9 and w? (A)4.6 (B)5.1 (C)6.3 (D)7.9 (E)8.2

    asked by Tiffany
  79. Algebra

    f(x)=x^2+x-12 g(x)=x-3 Solve (f/g)(x) and state the domain

    asked by Amy
  80. Math

    How do you write a quadratic equation with information saying that it opens upward, has a pattern of 1, 3, 5, and a vertex of (-4,5)?

    asked by Anonymous
  81. PED 121

    Question 3. 3. Lesson plans should be infused with local, state and national standards in order to support (Points : 1

    asked by Anonymous
  82. Math

    Concert took in $162000. Tickets were $8.50 per student and $12.50 per adult. Total if 15000 people attended. How many adults came to the concert?

    asked by Leonora
  83. Maths lit Business studies Economics History

    im in grade 10 and i want to know what jobs can i do with these subjects

    asked by Nompumelelo Mhlongo
  84. Business

    Is it better if canadian dollar has high value or low value for canada. I think high value is better. But I'm not sure

    asked by Elizabeth
  85. addmath

    Find the total number of integers between 10 and 1000 that are divisible by 3.

    asked by mandy
  86. addmath A.P.

    A wire of length 380 cm is cut into 10 pieces.Each piece is then bent to form a square.The dimensions of the first three smallest squares are shown below.Find the value of x and hence,the area of the eighth largest square. x cm[ ] (x+1)cm [ ] x cm (x+1)cm

    asked by mandy
  87. Life science,history,geography,math literacy

    Is it possible to become a law while you are doing those subject

    asked by Bonolo
  88. math

    I used 2/5 of my money in one store and 1/3 of what remained in a second store. If I had exactly 56 pesos left how much money did I have at first?

    asked by phoe
  89. math

    Kate has 78 foreign stamps; she has 15 less than twice as many Philippine stamps. How many stamps has she?

    asked by phoe
  90. Math

    In his first three years of coaching basketball at North High School, Coach Lucas' team won 8 games the first year, 17 games the second year, and 6 games the third year. How many games does the team need to win in the fourth year so the coach's average

    asked by Stacy
  91. science

    when will the resultant of the two vectors be at a maximum

    asked by mapula
  92. math

    the population of a town is modelled by the functions p(t)=6t2+110t+3000. when will the population reach 6000? thanks

    asked by Adnan
  93. math

    A car traveled at 50km/h for 4 hours and at 60km/h for 3 1/2 hours. What was the average speed for the whole journey?

    asked by phoe
  94. Physical Science

    how do i find the number of molecules in a packet of sweetners (splenda, equal, sweet & low).

    asked by andra
  95. Science/engineering

    What part does gravity play in the function of the water clock? Explain.

    asked by Daisy
  96. chemistry

    The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound?

    asked by Anonymous
  97. physics

    Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.

    asked by Anonymous
  98. Algebra Help!!

    If 5p = -100 + 3Q^2, which of the following could Q possibly be?

    asked by Maya T
  99. Math

    A boat has a speed of 4 m s −1 (relative to the surrounding water) and a heading of 170◦ . There is a current flowing from a bearing of 105◦ at a speed of 2.5 m s −1 . Take i to point east and j to point north. (a) Express the velocity u of the

    asked by Dave
  100. geometry

    A square playground has a perimeter of 2800 feet. It has a paved 6-foot walkway around it. What is the area of the walkway in square feet?

    asked by Marcia
  101. Calc

    Find the point on the parabola x+y^2=0 that is closest to the point (0,-3).

    asked by Anonymous
  102. geometry

    I am given triangle EDF with angles E and F being congruent. What is the perimeter of the triangle if ED= 2x+8, EF= 3x-6, and DF= 4x-6.

    asked by Luke
  103. Math

    Ms. Sue, Here are my questions you told me to repost. Thank you! I appreciate your help. 14. Mark weighs 74 pounds. Together, he and his sister weigh six pounds more than three times the weight of his sister. What is the weight, w, of Mark’s sister? a.

    asked by BlueSkies
  104. english

    How do I fix this sentence to create parallel structure? The university is one of the largest employers in the community, bring in substantial business, and the cultural impact is also big.

    asked by Leah
  105. History

    I'm writing a research paper and i need help finding out what these me on a website. • Timeliness: • Objectivity: • Writing Style and Mechanics: • Graphics: • Links:

    asked by Maddie


    asked by LERATO
  107. statistics

    The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of

    asked by Anonymous
  108. Math

    Q#1-josh just put new tires on his car. if the wheels have a diameter of 14 inches, determine how far will the wheels travel in 3 revolution, to the nearest hundredth? Q#2-Melanie wants to put ribbon around the circumference of a circular section of the

    asked by May
  109. English

    are they assertive,non assertive, or aggressive? You never return my phone calls. I am not sure when I can meet. I'm pretty busy. If we take the two o'clock train, we can get to the theater in time to have dinner before the show. The last designer I worked

    asked by S.A.M
  110. Algebra

    let f(x) = x^3 − 2 and g(x) = ^3√ x − 2 I can't figure out if these are inverses for each other, I don't know how to put in f(g(x)) or g(f(x)) and have an answer

    asked by Lauri
  111. science

    explain an animal cell in your own words and two things each part does

    asked by ash
  112. Math

    An explosion has occurred in Canada. Its blast radius was a regular circle that can be modelled by the equation x2 +y2=100, where x and y are measured in km. The blast destroyed everything within the circle. a) Canada has 4 fire stations located at the

    asked by Leonora
  113. Math

    Planner for a festival is trying to decide what to charge for ticket prices. Based on sampling they determine that if they charge $400 for a weekend pass, 40000 people will attend. However it has been pointed out to them that for each $10 reduction in

    asked by Leonora
  114. Mat 116 - Algebra

    Simplify (2x)^3 Thanks for the help!

    asked by Kim
  115. Mat 116 - Algebra

    Simplify x^2*x^3*x^4

    asked by Lisa
  116. Algebra 1a

    Simplify (xy)^-3/(x^-5y)^3

    asked by Kim
  117. physics

    A block of mass 10kg is pulled horizontally by a force of 75N that makes an angle of 37° to the horizontal whose coefficient of friction is 0.4 . what is the acceleration of the block

    asked by Eyosias
  118. geometry

    When looking at a quilt pattern, How do you describe the minimum number of translations of the original pattern A

    asked by Jill
  119. chemistry

    20 mL of propene is reacted with 70 ml of hydrogen at STP to produce propane, according to the equation. Calculate the volume of H2 gas consumed

    asked by Forance
  120. Math

    8-i/2+3i write complex # in standard form. I know to FOIL, not sure if I did it right, I got -13/4-9i then I'm not sure what to do next or if I'm lost can anyone help me?

    asked by Karen
  121. Math

    Does (2+5i)+(-2-4i) equal to 0+1i, or i?

    asked by Anonymous
  122. Math Homework Help

    Hello! I'm having problems with these two math problems. I've tried to solve them but I got nowhere. If someone could please help me, that would great! Thanks again! :) Directions: Verify the identity for each problem. 1.) cot^2y(sec^2-y-1)=1 2.) cosx+sin

    asked by Paige
  123. world history

    A list of Nelson Mandela's legacy(ies)

    asked by Annie