Questions Asked on
May 1, 2013

  1. General Chemistry

    The value of delta H for the reaction below is -6536 kJ. ____kJ of heat released in the combutsion of 16.0g of C6H6. 2C6H6(l) + 15O2(g) yield 12CO2(g) + 6H2O

    asked by Anonymous
  2. Chemistry

    1. What is the change in atomic mass number when an atom emits an alpha particle? decreases by 2 *decreases by 4 increases by 2 increases by 4 2. If an isotope decays by the process of beta emission, ____. the mass number changes *the atomic number changes

    asked by Anonymous
  3. History

    1. What finally decided the outcome of the 2000 presidential election? Congress a state court judge *the U.S. Supreme Court the nationwide popular vote 2. What group was directly responsible for the terrorist attacks on the United States on September 11,

    asked by Anonymous
  4. Financial Literacy

    An architect's compensation package includes the total cost of a $250-per-month health insurance plan, the total cost of a $35-per-month life insurance plan, and a salary of $55,000 per year. What is the yearly value of the compensation package? A.

    asked by Tifini
  5. algebra

    A satellite dish has a parabolic cross section and is 6 ft deep. The focus is 4 ft from the vertex. Find the width of the satellite dish at the opening. Round your answer to the nearest foot. Thank you

    asked by Jamie
  6. Physics

    Two waves traveling on a string in the same direction both have a frequency of 150 Hz, a wavelength of 2 cm, and an amplitude of 0.06 m. What is the amplitude of the resultant wave if the original waves differ in phase by each of the following values? (a)

    asked by Lege
  7. Geometry

    An unsharpened pencil is in the shape of a hexagonal prism, in which the face edge is 4 millimeters and the length is 170 millimeters. What is the lateral area of the pencil?

    asked by Dee
  8. chemistry

    A piece of dry ice (solid carbon dioxide) with a mass of 5.40 g is placed in a 10.0 L vessel? that already contains air at 715 torr and 25 degrees C. After the carbon dioxide has totally vaporized, what is the partial pressure of the carbon dioxide and the

    asked by Anonymous
  9. Math

    What do mountains breathe through? Volcanose?

    asked by Jerald
  10. Science

    1.Why do you think an FRH doesn’t come with water already in it? 2.Do you think there are small pieces or large pieces of magnesium metal in an FRH? Explain. 3. Why is it important that the reaction in an FRH be fast?

    asked by James
  11. Chemistry

    Why does the equation Co(H2O)6 + 4Cl CoCl4 + 6H2O shift left when cooled?

    asked by Jo
  12. Chemistry

    Given the following unbalanced equation C4H10 (g) + O2 (g) → CO2 (g) + H2O (l) What mass of water forms if 6.5 L of C4 H10 (g) measured at STP is allowed to react with 32.0 L of O2 (g)measured at 27°C and 1.68 atm pressure?

    asked by Dars
  13. Chem

    What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M (Kb for CH3NH2 = 4.4 x 10-4). In M

    asked by Yanis
  14. math

    A rainwater collection tank is shaped like a cylinder with a diameter of 4 ft and a height of 6 ft. What is its volume? Use 3.14 for pi. A. 15 units^2 B. 20 units^2 C. 30 units^2 D. 62 units^2

    asked by Anonymous
  15. physics

    A pencil is rolled off a table of height 0.35 m. If it has a horizontal speed of 2.1 m/s, how long does it take the pencil to reach the ground?

    asked by Anonymous
  16. Chen=mistry

    Sodium metal reacts violently with water to form NaOH and release hydrogen gas. Suppose that 3.00 g of Na reacts completely with 3.00 L of water and the final volume of the system is 3 L. What is the molarity M of the NaOH Solution formed by the reaction?

    asked by Janet
  17. Calc

    Oscar Corporation is planning to construct an elliptical gate at its headquarters. The width of the ellipse will be 5 feet across and its maximum height along the center will be 3 feet. The company wants to place two bright spots at the foci of the

    asked by Tyler
  18. biology

    1. Which of the following statements does not describe a difference between the DNA of prokaryotes and the DNA of eukaryotes ? a.prokaryotic DNA is shorter and less complex than eurkaryotic DNA b. Prokaryotic DNA chains have two nucleotides, eukaroyotic

    asked by Sven
  19. English II

    On a proud round cloud in a white high night. A. alliteration B. consonance C. assonance D. limerick

    asked by Bob
  20. physics

    a 1-kilogram block slides down a frictionless inclined plane with an angle of 35 degrees and 1.0 meters high. what is its velocity at the bottom of the plane?

    asked by Anonymous
  21. science

    A boy is riding a skateboard. Why does the skateboard have the ability to do work? A. because it can slow down B. because it can change direction C. because the force applied by the rider acts in the same direction as the motion of the skateboard D.

    asked by Anonymous
  22. English 10-Check/Help

    I need help with the rhyme scheme and rhythm pattern. "It was many and many a year agoIn a kingdom by the sea,That a maiden there lived whom you may knowBy the name of ANNABEL LEE;And this maiden she lived with no other thoughtThan to love and be loved by

    asked by Victoria
  23. Chemistry

    50.0 mL of 0.116 M NaOH is titrated with 0.0750 M HCl. Calculate the pH after the addition of 5.0 mL volume of acid.

    asked by Nathan
  24. chemistry

    Methane gas is burned releasing Carbon Dioxide into the atmosphere. How much CO2 (g) is released if 78.5 Liters of Methane is burned? CH4 + O2 --> CO2 + H2O

    asked by kate
  25. Chemistry

    Aqueous ammonia is typically sold by chemical supply houses as the saturated solution, which has a concentration of 14.5mol/L. What volume of NH3 at STP is required to prepare 100. mL of concentrated ammonia solution?

    asked by Shashi
  26. Math

    A bicycle lock has a 4-digit combination. Each of the digits is a number from 0 to 9. Find the probability that the lock has a combination in which 3 of the 4 digits are 3s

    asked by KK
  27. Financial Literacy

    Trina's employer purchased a health insurance plan that costs $550 per month. Trina pays $85 toward the plan each month. What is the annual value of the employer's contribution? A. $7560.00 B. $5580.00 C. $1020.00 D. $6600.00

    asked by Tifini
  28. Physics

    A flute can be regarded as a tube open at both ends. It will emit a musical note if the flutist excites a standing wave in the air column inside the tube. The lowest musical note that can be played on a flute is C (261.7 Hz). What must be the length of the

    asked by rishabh gupta
  29. chemistry

    The volume of a sample of a gas collected over water at 32 Celsius and 752 torr is 627 ml. What will the volume of the gas be when dried and measured at STP? (Vapor pressure of water at 32 Celsius = 35.7 torr)

    asked by Cory
  30. chemistry

    The volume of a mass of gas is 300 ml at 25 Celsius and 685 torr. What will the gas occupy at STP?

    asked by Isabel
  31. statistics

    Paul received a score of 80 on a history test for which the class mean was 70 with a standard deviation of 10. He received a score of 75 on a biology test for which the class mean was 70 and the standard deviation was 2.5. On which test did he do better

    asked by Anonymous
  32. math

    A conical funnel has a base diameter of 4 cm and a height of 5 cm

    asked by jerry
  33. Chemistry

    what is the hydronium ion concentration in a 0.55 M HNO3 solution ? what is the pH of this solution? Thank You!!!

    asked by David
  34. Chemistry

    A student determined the H of neutralization of nitric acid (HN03) mixed with NaOH solution, using the procedure described in this experiment. Fifty milliliters of 1.00M HN03 was added to 50.5 mL of 1.00M NaOH solution, and the following time-temperature

    asked by Mimi
  35. Chemistry

    what is the hydronium ion concentration in a 0.55 M HNO3 solution ? what is the pH of this solution? Thank You!!!

    asked by David
  36. Algebra

    7t^4 • 7t^4 A.49t8 B.14t4 C.49t16 D.14t8 Is this 49t^8...A..?

    asked by Cassie
  37. Pre-Calculus

    Could someone check my answers? 25. 32^(2x-3)=2 Answer- x= 8/5 26. 9^(2x+1)=81 Answer- x= 1/2 27. 1/4=2^3x Answer- x= -2/3 28. 1/27=3^2x Answer- x= -3/2 29. 9^x=27 Answer- x= 3/2 30. 32^x=4 Answer- x= 2/5 31. 27^(x+1)=9 Answer- x= 1/2 32. 125^(x-2)=25

    asked by Caroline
  38. physics

    A diving bell is lowered into the sea at a speed of 6m/s and comes to rest with uniform retardation at a distance of 20m below the surface. What is it's retardation?

    asked by Anonymous
  39. math

    A spherical ballon is being inflated at the rate of 35cc/min. the rate of increase in the surfece area(un cm²/min.) of the ballon when its diameter is 14cm is: 1. 10 * under root 10 2. under root 10 3. 100 4. 10

    asked by aku
  40. economics

    What are welfare payments or consumer subsidies?

    asked by lee
  41. Eng B

    Shall I compare thee to a summer’s day? Thou art more lovely and more temperate: Rough winds do shake the darling buds of May, And summer’s lease hath all too short a date: Sometime too hot the eye of heaven shines, And often is his gold complexion

    asked by Jen
  42. Math

    A math class has girls and boys in the seventh grade and girls and boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both

    asked by MADISON
  43. Math

    Ariel's garden is planted in the shape of a square and has an area of 81 square feet. If she plans to put a fence around the perimeter of the garden, how much fencing will she need? A) 18 ft, B) 41 ft C) 36 ft D) 9Ft I came up with D 9 foot but apparently

    asked by Daniel
  44. Chemistry

    Calculate Kp at 298K for the reaction SO2 + NO2--->SO3 + NO

    asked by Charlie
  45. calc

    Integrate 2(x^2)e^g(x) where g(x)=4^(x^3)

    asked by Sunny
  46. Science

    How could an architect estimate the weight of a brick wall if each brick weighs three pounds?

    asked by Grayson
  47. Geometry

    a belt is wrapped tightly around circle O and forms a right angle at P, outside the circle. find the length of the belt if circle O has a radius of 8.

    asked by Anonymous
  48. math

    In a sample of 77 widgets,6 were defective, How many defective widgets would you expect in a sample of 616 widgets?

    asked by pandora
  49. Geometry

    a belt is wrapped tightly around circle O and forms a right angle at P, outside the circle. find the length of the belt if circle O has a radius of 8.

    asked by Anonymous
  50. english

    3. Which one of the following sentences best describes paraphrasing? A. Janette listened to the speaker and took notes. B. Janette listened to the speaker, asked questions, and wrote a report. C. Oscar studied Dr. Frost's article and summarized it in his

    asked by selena
  51. Physics

    Some communication satellites are put into a circular geosynchronous orbit in which the satellite remains above a certain position on the earth's equator as it orbits. Such a satellite would always be in the same position in the sky as seen from the

    asked by J
  52. Chemistry

    The volume of a mass of gas is 300 ml at 25°C and 685 torr. What will the gas occupy at STP? Will the temperatures be the same when I do (P1V1/T1) = (P2V2/T2) ?

    asked by haley
  53. algebra 1

    Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after

    asked by Brittany
  54. Calculus

    A particle moves along the curve y = sqr(1+x^3). As it reaches the point (2,3), the y-coordinate is increasing at a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant?

    asked by Kate
  55. Elements of Calc.

    A 17 foot ladder is placed against a wall. if the foot of the ladder is pushed toward the wall at 0.5 feet per second, how fast is the top of the ladder rising when the foot is 8 feet from the wall?

    asked by Tim
  56. Urgent Language Arts~!

    10. In the following sentence, "Abraham Lincoln was a widely admired politician,” which statement is correct? (1 point) Add a hyphen between widely and admired. Add a hyphen between admired and politician. Add a hyphen between Lincoln and was. No hyphen

    asked by Gabby
  57. Geometry

    a belt is wrapped tightly around circle O and forms a right angle at P, outside the circle. find the length of the belt if circle O has a radius of 8.

    asked by Anonymous
  58. English

    1. Two months ago, he was flying to L.A. for a meeting. 2. Two months ago, he was flying to L.A. to have a meeting. (Are both the same?) 3. While he was writing a report, the battery in his computer died. (What other words can we use instead of 'died'?) 4.

    asked by rfvv
  59. Math

    Juan's model locomotive is 7 5/8 in long HIs coal car is 6 1/4 in long when hooked together there is a 7/8 inch space between the cars. What is the total length when the two cars are hooked together? I added the fractions and got 13 7/8 what do I do with

    asked by Jerald
  60. Calculus

    Differentiate ln(cos(2x))

    asked by Ty
  61. Chemistry

    Estimate the temperature where Delta G = 0 for the following reaction (Given: Delta H=-176 and Delta S = -284.5 J/K NH3 + HCl --> NH4Cl

    asked by ramire2
  62. Chemistry

    what is the rate of a first-order reaction that has a reactant concentration of 1.1M and a rate constant of 0.14/s?

    asked by George
  63. life orientation

    Identify and describe 3 environmental health hazards that cause ill health,crises,and or disasters within your community or any other community within south africa and globally.

    asked by lerato
  64. English 10-Check/Help

    Part 1: Poem Structure Check my following answers below, and I need help with theme? Dx In this part, you will analyze the structure of the poem. Please fill out the following. Title of Poem: Annabel Lee Poet: Edgar Allan Poe Theme: Type of Poem: Narrative

    asked by Victoria
  65. U.S. History

    Briefly describe what happened in the presidential election of 2000, including who the candidates were, who won, and how the win was accomplished.

    asked by Drizzy Joven
  66. english

    1. Read the following stanza from “Alone”: Lying, thinking Last night How to find my soul a home Where water is not thirsty And bread loaf is not stone I came up with one thing And I don’t believe I’m wrong That nobody, But nobody Can make it out

    asked by amber
  67. Math (Combinatorics)

    In the plane, the points with integer coordinates are called lattice points. Suppose a flea in the plane jumps from one lattice point to another. Each jump is one unit to the right, one unit to the left, one unit up, or one unit down. If the flea starts at

    asked by Hale
  68. Geometry

    A landowner digs a 15 meter deep well with a diameter of 2.8 meters. The landowner spreads the dirt dug out of the holds to form a flat platform 31.5 meters by 6 meters. What is the length of the platform?

    asked by Dee
  69. Justice system

    1. The majority of historical and scholarly evidence suggests that poverty: A. and crime tend to increase at the same time. B. may serve to perpetuate crime but is not a major cause of crime. C. and crime are totally unrelated. D. and crime rates stand in

    asked by Amy
  70. physics

    Rotating blade (body force in axial loading) A blade is fixed to a rigid rotor of radius R spinning at omega(w) rad/sec around the vertical z axis, neglect the effect of gravity, calculate the peak stress in the blade calculate the blade elongation.

    asked by mehwish
  71. mcc

    Larry bought a house for $220,000. After one year, its value appreciated (increased in value) by 15%. During the second year, its value depreciated (decreased in value) by 12% from its value at the end of the first year. What was the value of the house at

    asked by Anonymous
  72. Justice system

    1. The crime control model: A. stresses the possibility of error in the stages leading to trial. B. believes in protecting society from criminal behavior. C. emphasizes the need to protect procedural rights. D. assumes that justice is better served if

    asked by Amy
  73. chemistry

    Matt forgot to put the fabric softener is the wash. As his socks tumbled in the dryer, they became charged.If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric

    asked by michael
  74. Algebra

    Given f(x)=x^2 + x + 4 and h(x)= 3x +2, evaluate the composite function. f [h(x)]

    asked by Tanya
  75. life orientation

    Teenage pragnancy

    asked by Anonymous
  76. Math

    One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to $600,000, what are the total sales of the company?

    asked by Erica
  77. physics

    The inverted pendulum shown consists of a uniform rod of length L and mass M hinged at its base. A spring is attached a distance h from the pendulum’s pivot and has a spring constant k. At equilibrium the pendulum is perfectly vertical. For small

    asked by aisha
  78. Physics

    1. How much work must be done to stop a 1750 kg truck traveling at 110.0 km/h?

    asked by Nj
  79. Algebra

    Given h(x)= 2x + 2 and f(x)=1/2 x + 4, evaluate the composite function. h[f(x)]

    asked by Tanya
  80. Chemistry

    dilute the concentration of 100mL of KIO3 from 0.5M to 0.0005M

    asked by lizette
  81. math

    what is 5X8=

    asked by marlyn
  82. l.o

    in 10-20 lines critically discuss 5 ways in which the environmental problem impacts on the community(any community in south africa)

    asked by xolani
  83. English II

    "Base Details" If I were fierce, and bald, and short of breath, I’d live with scarlet Majors at the Base, And speed glum heroes up the line to death. You’d see me with my puffy petulant face, Guzzling and gulping in the best hotel, Reading the Roll of

    asked by Bob
  84. physic

    The composite bar BCD in the figure is composed of an inner aluminum cylindrical core of length 2l=2m and radius R=1cm and a sleeve of steel of length L=1m and thickness R=1cm surrounding the aluminum core in the CD section of the bar. The Young’s moduli

    asked by asas
  85. physics

    A block with mass m=6.00kg slides down a surface inclined at 37° to the horizontal. The coefficient of kinetic friction is 0.20. A string attached to the block is wrapped around a flywheel on a fixed axis as seen in the figure. The flywheel has mass 25.0

    asked by allison
  86. math

    h(t)= 20t-4.9t^2

    asked by Anonymous
  87. Math

    At 30 degrees, Edgardo said the temperature was warm enough to go swimming. Did he mean to give the temperature in Fahrenheit or Celsius. Explain.

    asked by Quan
  88. Grammar

    What revision will correct the sentence? "Welcome," the announcer began. "to our fifth annual competition!" A. The word the should be capitalized. B. The period after began should be changed to a comma. C. The word to should be capitalized. D. No revision

    asked by bubbie
  89. Physics

    Physics Help!!!!! Maximum Kinetic Energy based on a graph? A 2.50kg ball is attached to an unknown spring and allowed to oscillate. The figure shows a graph of the ball’s position x as a function of time t.(Figure 1) Part A: What is the maximum kinetic

    asked by Darren
  90. Ife orientation

    Provide 5 ways in wich you critically discuss the impact of hiv/aids on teenagers

    asked by Thapelo
  91. englis

    8. Which of the following options accurately represents the steps involved in the writing process? A. Write first draft, edit, revise, write final draft B. Write first draft, revise, proofread, write final draft C. Plan, write first draft, edit, write

    asked by selena
  92. Chemistry

    Use the data in the table to calculate the Delta G0 of the following reaction at 298k: Al2O3 ---> Delta G fusion -1582.3 HCl----> -131.2 AlCl3 -----628.8 H2O --- -237.1 The equation is Al2O3 + 6HCl ---> 2 AlCl3 + 3H2O products - reactants?

    asked by ramire2
  93. islah publek school

    a rectangular garden has a perimeter of 140m.its width is three quarter of its length. what is the length and width?

    asked by nia biscraft
  94. chemistry

    The following reaction occurs in a 2.0L reactor at 800 degrees c. CO+H20-CO2+H2 The reactor is charged initially with 5.0 atm of CO and 8.0 atm of water vapor. Calculate the final pressure of hydrogen in the reactor.

    asked by Sharaun
  95. geometry

    M is the midpoint of JK, Q is the midpoint of MK, and X is the midpoint of MQ. if a point on JK is picked at random, what is the probability that the point is on MX?

    asked by Nick
  96. Math

    I need to find the exact value of tan(arccos(-sqrt 11/6)).

    asked by Amy
  97. Eng B

    Among early epic poems, _____ is the story of a man who searches out a beloved friend in the land of the dead. A. Beowulf B. Gilgamesh C. The Iliad D. The Odyssey Answer is "D"

    asked by Jen
  98. business math

    Austin & Kaitlyn Kojan invested $195,000 in a business venture. If Kaitlyn invested 2 1/4 as much as Austin invested, how much money did Kaitlyn invest?

    asked by vanessa
  99. life orientation

    How water pollution problems that causes ill health,accident, crises and disasters within my community or ony community within south africa and globally

    asked by nokuthula
  100. Math (Geometry)

    Square ABCD has M as the midpoint of AB, N as the midpoint of BC, P as the midpoint of CD and Q as the midpoint of MP. If the area of AMNPDQ is 20, what is the area of ABCD?

    asked by Hale
  101. English

    How do you pronounce "mouths," which is the plural form of 'mouth.'

    asked by rfvv
  102. math

    if sin^14A+cos^20A=x then find the smallest interval in which value of x lie

    asked by aashi
  103. chemistry

    Three metals, iron, copper, and gold, have heat capacities of 0.450 J/goC, 0.385 J/goC and 0.129 J/goC, respectively. A 10g sample of each metal was heated in a water bath at 100oC. One of these metals will be placed in a Styrofoam cup containing 50.0 mL

    asked by kay
  104. Life Orientation

    Hi I am a matric learner and I am having trouble with an lo portfolio assignment. it is about environmental issues and im stuck. I need to identify and describe 3 environmental health hazards that cause ill health, accidents, crisis and disasters within my

    asked by Ashley
  105. Statistics

    Use the sample data and confidence level to construct the confidence interval estimate of the population p....n=5200, x=4821, 99% confidence

    asked by Tangee
  106. Physics

    Consider the following RLC series circuit. with V=5 Volts, R=15 Ohms, C=0.004 Farad, L=0.045 Henry. Define the frequencies ω± as the frequencies such that the absolute value of the current of the circuit I0(ω) equals 1/2*I0max. What is the difference

    asked by rishabh gupta
  107. LIFE ORIENTATION

    Discuss in paragraph of 150 words 5 ways in which one can take responsibility to provide safe and healthy living environment

    asked by Anonymous
  108. Math

    Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after

    asked by Brittany
  109. Accounting

    Alliant Corporation sold $100,000,000 face value 8% bonds. The bonds mature in 20 years and pay interest semiannually. The going market rate of interest on bonds of similar risk is 6%. How much will Aliant receive upon the sale of the bonds

    asked by Jessica
  110. Physics

    The planet Tralfamador is a planet of mass M and radius R, and very thin atmosphere (neglect air resistance). A magnetic rail gun has been mounted on the surface of Tralfamador at the North pole. A projectile of mass m is fired from the magnetic rail of

    asked by J
  111. Physics

    Consider the following standing wave, (all units are SI) z=0.2sin(0.4y)cos(350t) (a) what is the wavelength? (b) what is the angular frequency ω in radians/sec? (c) what is the frequency (f) in Hz? (d) The values of y where the displacement is always

    asked by rishabh gupta
  112. Science

    What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M (Kb for CH3NH2 = 4.4 x 10-4).

    asked by Yanis
  113. Music

    Who sang the song Oliver Twist

    asked by Anonymous
  114. algebra

    convert 0,125m to km

    asked by Anonymous
  115. physical science

    A nail is driven into a board to a depth of 1.00 cm with one strike from the hammer. The hammer striking the nail hit it with a force of 200.00 Newtons. How much work was done?

    asked by kelli
  116. Math

    Jan built a cube from unit cubes (each 1 by 1 by 1 unit). Ken took this cube apart,and used the unit cubes to build a rectangular solid that was the same height asJan's cube but 2 units greater in width and 2 units less in length. Ken had 24 unit cubes

    asked by Nate Williams
  117. life orientation

    discuss in a paragraph of 150 words ways in which one can take responsibility to provide safe and healthy living environment

    asked by kay
  118. Thermodynamics

    Water in a piston/cylinder is at 100degC, x=0.5 with mass 1kg and the piston rests on two stops. The equilibrium pressure that will float the piston is 300 kPa. The water is heated to 300degC by an electrical heater. a) At what temperature would all the

    asked by Kyle
  119. Physics

    Consider an RC series CKT with V in series with RC. V=7 V, R=15 Ohm, C=0.0025 Farad. At t=0 we start charging the capacitor with no charge initially on the capacitor. (a) Calculate the time t∗ (in seconds) when the potential across the capacitor is V/2.

    asked by rishabh gupta
  120. Math

    You observe a plane approaching overhead at a speed of 600 mph. The angle of elevation of the plane is 14 degrees at one time and 54 degrees two min later. A) What is the altitude of the plane? B) how far from the plane are you (after two minutes)?

    asked by Moppy
  121. Chemistry

    calculate the volume of 1.07M phosphoric acid solution necessary to react with 22.9 ml of 0.150M Mg(OH)

    asked by Juan
  122. Math

    Is this the correct numerical expression for 15 less than one-ninth of P? 15-1/9 P

    asked by Ann
  123. Accounting for Non Accounting Majors

    Comment on Dr. Hendley’s statement that the difference between the opening bank balance ($30,000) and the January statement balance ($75,000) is pure profit.

    asked by Stacy
  124. english

    Write some paragraphs about your own family.

    asked by kina
  125. Math

    Out of 124 questions I missed 39. what percentage is that out of the 124?

    asked by Marquis
  126. Eng B

    As we find with most songs, in poetry

    asked by Jen
  127. math

    Elizabeth has a box of shirts. one half of the shirts are small, 2/5 of the shirts are medium, and 5 shirts are large. How many shirts are in the box?

    asked by dave
  128. Maths

    An equilateral triangle with side length 33 is divided into 33^2 smaller unit equilateral triangles each with side 1, forming a triangular lattice. We color each segment of length 1 either Red, Blue or Green, subject to the condition that each small unit

    asked by Maths lover Please Help...
  129. statistics

    researcher wants to know if state quarters have a weight that is mor than traditional quarters. he selected 18 state quarters and 16 traditional, weighed each of them and recorded data. test the claim that state quarters have a mean weight that is more

    asked by Anonymous
  130. math

    1/4v=5 Use the substitution method to solve this problem.

    asked by Janey
  131. Algebra

    Given f(x) = 2x − 1 and g(x) = 4x − 4, evaluate the composite function. g[f(x)]

    asked by Tanya
  132. CHEMISTRY HELP!!!

    21. Classify the following solutions in order of increasing pH: a. 0.01 M NaOH b. pure water c. 0.10 M HCl d. 0.05 M NaOH e. 0.001 M HCl

    asked by scilover
  133. college algebra

    I have been stuck on this problem for over a week and I don't even know how to start the problem. Parabola equation y= 4(100 - x^2/2500) x and y are measured in feet A. Find the length of the road across the bridge B. find the height of the parabolic arch

    asked by Karry
  134. Further Mathematics

    The sum of the first three terms of a G.P is 7/8 of the sum to infinity .Find the common ratio.

    asked by Akintunde
  135. math

    if a woman has a 50 ft. piece of wire & cuts it into strips 1 2/3 feet long, how many pieces will she have

    asked by katie
  136. Math

    An individual has 25000 to invest. As their financial consultant, you recommend investing in Treasury Bills earning 7%, Corporate Bonds earning 9% and Junk Bonds earning 11%. Find all the investment alternatives that will earn $2000 per year.

    asked by Rick
  137. Justice system

    In contrast to the Warren Court, the Burger Court appeared to support a/an: A. due process model. B. crime control model. C. corrections model. D. inmates model. is it B 2. Natural law is best described as: A. the laws of the church. B. a body of

    asked by Amy
  138. Math

    emma throws the javelin for the track team. At one meet she threw the javelin twice. One the first attempt she three 28 meter and on the second attempt she threw 32 meters. What is the ratio between the length of the first throw and the second throw?

    asked by TootiE
  139. U.S. History

    How did the events of June 6, 1944, impact on World War 2?

    asked by Drizzy Joven
  140. Chemitry

    calculate the volume of 1.07M phosphoric acid solution necessary to react with 22.9 ml of 0.150M Mg(OH) 2H3PO4 +3Mg(OH)2 ==> Mg(PO4)2 + 6H20

    asked by Juan
  141. chemistry

    What is the minimum volume of 10.0 M H2SO4 necessary to react completely with 16.2g of Na2CrO4?

    asked by Tess
  142. Physics

    a metal sample carrying a current along X-axis with density Jx is subjected to a magnetis field Bz(along z-axis). the electric field Ey developed along Y-axis is directly proportional to Jx as well as Bz. the constant of propotionality has SI unit. 1.

    asked by aku
  143. physics

    A downhill skier is on top of a hill at a height of 30.00 meters. How fast will he be moving when he is at level portion at the bottom of the hill?

    asked by bob
  144. math

    if matt buy's a cola at $1.69,gets a refill 3 time, for cost of $.45 each: which answer best fit the problem! a.d=3-1.69+.45 b.1.69+3.45 c.d=1.60+0.45+3 d.3=3-1.69+0.45

    asked by latoya jefferson
  145. physics

    bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young module total length

    asked by mehwish
  146. Physics

    A massless spring, with K=425 N/m, is hung vertically with the bottom end of the spring at position Y.i. A 3.50 kg mass is attached to the bottom of the spring and allowed to fall and oscillate. A) How far below Y.i does the mass fall before coming

    asked by J
  147. Physics

    A circuit contains a self-inductance L in series with a capacitor C and a resistor R. This circuit is driven by an alternating voltage V=V0sin(ωt). We have L=0.015 H, R= 80 Ω, C= 5e-06 F, and V0=40 volts. (a) What is the value (in radians/seconds) of the

    asked by rishabh gupta
  148. Chemistry

    Points in favour: 1.Diffusion helps reduce the pollution of toxic gases. Points against: 1. old stains of ink, tea/coffee, cooked food are hard to remove through diffusion, or just hard to remove ... HELP PLS....V.V.IMPORTANT

    asked by Anjana
  149. History

    Who is Shaka Zulu

    asked by Anonymous
  150. mathematics

    A person can drive from city A to city B at a certain rate of speed in 6 hours. If she decreases her speed by 10 mph, she can make the trip in 8 hours. How far is it from city A to city B?

    asked by Anonymous
  151. English

    Select one of the common terms below to redefine in your own words. Make some prewriting notes in the text box. Make sure to indicate which term you have chosen. Terms: -friendship -gratitude -disgust -isolation -accomplishment -satisfaction -hypocrisy

    asked by Josh
  152. Math/Stats

    I have like 9 more of these problems, can someone please help me out so I can get started. thanx JS In a random sample of 35 tractors, the annual cost of maintenance was $4,425 and the standard deviation was $775. Construct a 90% confidence interval for

    asked by Jessica
  153. math

    If velocity v of blood flow at distance r from the center of an artery of radius R is given by v = k (R^2 - r^2), constant k > 0, find the average velocity v along the radius of an artery using 0 to R as the limits of integration

    asked by Steve
  154. Calculus

    Derive: F(x)= sqrt(3, 1 + tan(x))

    asked by Mason
  155. Math

    Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000 (inclusive). How many of these 1000 geometric sequences have the property that the sum of the 3 terms is prime?

    asked by Maths lover Please Help...
  156. English

    Can someone correct these questions, please? Thank you very much in advance. 1) Briefly outline the features of the 18th-century novel focussing on the type of narrator, the hero and the time and place setting. 2) Analyze the structure of Swift's

    asked by John
  157. Math (Algebra)

    The roots of the polynomial f(x)=7x2+31x+c=0 are reciprocals of each other. What is the value of c?

    asked by Arnau
  158. Geometrey

    A right triangle has perimeter equal to 80 and hypotenuse equal to 34. What is the area of the triangle?

    asked by David Kroell
  159. Life Orientation

    5 ways of in which you critically discuss how lifestyle disease impact on the teenager

    asked by Zinhle
  160. English

    I have to write essay but need help.essay topic how to get rid of facebook?

    asked by Nisha
  161. English

    what is the noun !@#$%^&tion of He must like studying calculus.

    asked by Dilly
  162. American Government

    What is the largest citizen's group with over 30 million members?

    asked by Evelyn
  163. Physics

    Consider the series RLC circuit in which R2

    asked by rishabh gupta
  164. chemistry

    the density of mercury is 13.6 g/cm3. how many liters are in 829 grams of Hg.

    asked by ashley
  165. Statistics :(

    I have like 9 more of these problems, can someone please help me out so I can get started. thanx JS In a random sample of 35 tractors, the annual cost of maintenance was $4,425 and the standard deviation was $775. Construct a 90% confidence interval for

    asked by Jessica
  166. LIFE ORINTATION

    DISCRIBE THE BASIC CONDITION OF EMPLOYMET ACT

    asked by NOMSA
  167. U.S. History

    Briefly describe "New Federalism."

    asked by Drizzy Joven
  168. Life orientation

    Describe the life style disease/ behaviour and factors that contribute to the disease

    asked by Nelisiwe
  169. algebra.. HELP ME!!!

    Three roots of f(x)=x^4−2x^3+ax^2+bx+c are −5, −3 and 4. What is the value of a+b+c?

    asked by sony
  170. Math

    I'm having a hard time coming up with the right equation to solve this one. E-Z Stop Fast Gas sold $10,957 worth of gasoline yesterday. Regular grade sold for $2.30 a gallon and premium grade sold for $2.55 a gallon. If the station sold 420 more gallons of

    asked by Ann
  171. math

    number N of state and federal inmates in millions during year x where x >=2002 can be approximated by the following formula N=0.04x-79.02. determine the year in which there were 1.1 million inmates

    asked by Christy
  172. Math (Algebra)

    Arnau is running a luggage shop. A brand-new item priced at 30% above the cost price did not sell well. So he took 39 dollars off the price, and found that the bags sold very well. If the profit for each bag is now 10% of the cost price, what is the cost

    asked by Arnau
  173. math

    Jim draws a sketch of his bedroom wall to scale. The actual wall is 10 feet long and 8 feet high. The drawing is one- sixth the length and width of the actual wall. What are the dimensions of the drawing in inches?

    asked by jason
  174. Algebra

    Given f(x)= 2x^2 – 1 and g(x) = –2x + 1, find the following. f(3) − g(3)

    asked by Tanya
  175. science

    a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy

    asked by aa
  176. science

    a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy

    asked by aa
  177. physics

    what should be the length of aluminum and a brass rods at STP. so that brass rod is longer than the aluminum rod by 4 cm at all conditions of temperature

    asked by sani
  178. life orientation

    5 ways in which the human or environmental problem impacts on the community . provide relevant sources to support your claims.

    asked by mahlatse
  179. Physics

    Consider the following RLC circuit with V=3 Volts, R=25 Ohms, C=0.006 Farad, L=0.085 Henry. Define the frequencies ω± as the frequencies such that the absolute value of the current of the circuit I0(ω) equals 12I0,max. What is the difference

    asked by Anonymous
  180. Help english

    My essay topic what should people do if they r addicted to facebook? Help please

    asked by Nisha
  181. Algebra

    H= 16t^2. To solve Round answer to nearest 10th of a second. A stuntman jumped from a ht of 329 ft off a crane, onto a airbag. Determine the time of stuntmans fall. Fall lasted approximately_______ seconds.

    asked by Dorothy
  182. mathematics

    In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is $5.75. How many nickels are there in the collection ?

    asked by Anonymous
  183. government

    A colony of a country that followed mercantilism during the 17th century would NOT be encouraged to develop __________.

    asked by Anonymous
  184. 5th grade Math

    How do you add fractions with different denominators? Thanks if you help :)

    asked by Kim
  185. life orietation

    identify and describe 3 environmental health hazards that cause ill health,crises,and disasters within south africa and globally,

    asked by justin tshabalala
  186. life oreination

    5 factors that contribute to a lack of physical fitness and proper nutrition in the adolescent

    asked by summet
  187. statistics

    In a survey of 1,000 people, 520 are opposed to the tax increase. Construct a 95% confidence interval for the proportion of those people opposed to the tax increase.

    asked by Mynor
  188. math

    Assume you do not know the population standard deviation. describe how you form a 90% confidence interval to estimate the population mean age for students at Westwood College Online.

    asked by ruby
  189. Maths

    There are 4 students in a class. A teacher wants them to each secretly choose a partner for a group project. If everyone independently choses a partner randomly, the probability that everyone choses a partner who chose him/her is P. What is the value of

    asked by Maths lover Please Help...
  190. Physics

    a metal sample carrying a current along X-axis with density Jx is subjected to a magnetis field Bz(along z-axis). the electric field Ey developed along Y-axis is directly proportional to Jx as well as Bz. the constant of propotionality has SI unit. 1.

    asked by Anurag
  191. Math

    The Book Nook makes four times as much revenue on paperback books as on hardcover books. If last month’s sales totaled $124,300, how much of that money was made on paperbacks?

    asked by Sue
  192. Math

    When I add the mixed number 1 5/6 + 1 3/4 I get 2 19/12 How do I simplify that?

    asked by Jerald
  193. Maths

    Estimate the following questions (A) 4013 divided by 22 (B) 182x18 divided by 0.46 (C) 382x43 divided by 0.24 WITH WORKINGS

    asked by Estimate 4013 divided by 22
  194. math

    245 = .25x not sure how to do this since I have only learned with ratios

    asked by liz
  195. Cal/Math

    F(x) = 3-2x, x is less than or equal to 5 F(x)= e^x find the absolute and local max and mins of f

    asked by Amy
  196. science

    a student went downhill from a flatsurface on a skateboard is this increase in friction or increse in velocity

    asked by aa
  197. science

    a student went downhill from a flatsurface on a skateboard is this increase in friction or increse in velocity

    asked by aa
  198. science

    Does the moon reflect or absorb sunlight?

    asked by aa
  199. life orientation

    Identify and describe 3 environmental health hazards that cause ill health,crises and disasters within any other community within south africa and globally

    asked by faith
  200. math (Algebra)

    I was wondering if someone can help me with this question ,please... (2r5+r3)^2 r=radical

    asked by Alice
  201. physics

    bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young module total length

    asked by mehwish
  202. language and art

    How to write a character sketch?

    asked by logan
  203. Speech

    Please rephrase the following sentences into a more simple manner. I need to give a presentation and i would like to write this out simpler. Thank you guys Research of soil erosion is difficult for several reasons, but particularly because soil erosion is

    asked by alex
  204. mathematics

    In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is $5.75. How many nickels are there in the collection ?

    asked by Anonymous
  205. grammar please help!

    I still need help on 1 and 2. Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b. father c. from d. work 2. Ashley put her journalism books in the new bookcase. a. bookcase

    asked by Jade
  206. Everybody hw help who go facebook

    I don't use facbook.but hw essay topic what should people do to get rid out of facebook? What should they do if they r addicted to it? Ples helppp

    asked by Nisha
  207. calc

    integrate 1/(1+(e^-x)) please provide steps

    asked by Anonymous
  208. Music

    What is Afrobeats ????

    asked by Anonymous
  209. English

    Every sentence in the paragraph below violates some principle of good persuasive writing. Revise the paragraph, following the directions at the end of each sentence; use your imagination where necessary. Type the revised paragraph in the text box provided

    asked by Josh
  210. math

    exercise no 1.4 question no 5

    asked by danish
  211. Maths

    G is a circle with chord AB. P is a point outside of G such that PA is tangent to G and ?BPA=90°. If AB=48 and PB=8, what is the radius of G?

    asked by Maths lover Please Help...
  212. Calculus

    f(x)= e−(5x)⋅cos(3x)

    asked by Harry
  213. physics 2

    Suppose that now the magnetic field is reversed, i. e., it is coming out of the page. The charges q1 and q2 are positive, and the charges q3 and q4 are negative. How many of the display paths are incorrect?

    asked by millah
  214. Math (Algebra)

    As x ranges over all real values, what is the minimum value of the polynomial x4−14x2+303?

    asked by Arnau
  215. social studies

    Respond to the following in a complete sentence: Why do you think some Framers of the Constitution insisted on including a Bill of Rights? can you please help me on this

    asked by angela
  216. English HELP!!!

    I need a biography about Jim Lovell!! HELP PLEASE

    asked by Somer
  217. physic

    The bar in the figure has constant cross sectional area A . The top half of the bar is made of material 1 with mass density ro1 , and Young’s modulus E1 . The bottom half of the bar is made of material 2 with density ro2 and Young’s modulus E2=2E1 .

    asked by asas
  218. physics

    bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young module total length

    asked by mehwish
  219. life orientation

    in 10 15 lines critically discuss 5 ways in which the human or enviromental problem impacts on the community

    asked by khulo
  220. English

    What are some mature ways to decide issues within groups?

    asked by Nina
  221. mathematics

    In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is $5.75. How many dimes are there in the collection ?

    asked by Anonymous
  222. mathematics

    In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is $5.75. How many quarters are there in the collection ?

    asked by Anonymous
  223. agriculture

    Outline and explain the objectives of fencing a farmland.

    asked by tumi
  224. Justice system

    Although its meaning may vary from one culture to the next, __________ appears to be an almost universal taboo. A. murder B. rape C. theft D. incest im confused between B n D 2. “Common law” refers to: A. offenses committed against the safety and order

    asked by Amy
  225. english competiton

    help the environment by recycling

    asked by fathima
  226. calc

    Given X^2 + Y^2 = R^2, namely, a circle with center (0,0) and radius R, use integration to prove that the circle’s area equals πR2

    asked by Sunny
  227. math

    (Mad +lice)+(equations + r +p - square)= decimal_______

    asked by anomymous
  228. milimeters question

    A box measures 24mm on a side. What is the volume of the box ? Help me with steps please?

    asked by Michael
  229. U.S. History

    The Soviet Union was angry at the efforts of the United States to prevent it from successfully spreading its communist ideology. Briefly describe two actions that it took in retaliation.

    asked by Drizzy Joven
  230. Chem

    In a preweighed flask a sample of5.8 gm was combined with water,mass of solid and water after subtracting flask weight is24.6gm,density of water is 0.997g/ml,what is density of solid.

    asked by Nina
  231. westbrook high

    18.75 tons= how many lbs?

    asked by daraishia
  232. Math (Algebra)

    The ratio of three positive integers is 2:4:5 and their least common multiple is 300. What is the sum of the smallest and the largest of the three numbers?

    asked by Arnau
  233. life orentation

    Identify and describe 3 environmental health hazards that cause ill heath,crises,and or disasters within the community

    asked by Anonymous
  234. History HELP!

    In history, I am learning about the civil war and I need to answer the following question: Finish the following sentences: 1. In the East the Union faced defeat, although 2. Although it was costly, the Union victory at Antietam Thanks so much!

    asked by kalia
  235. Algebra

    Given f(x)=2x^2 + 9x − 7and g(x)=2x −6, find the following. (If an answer is undefined, enter UNDEFINED.) f(−2) − g(−2)

    asked by Tanya
  236. Pre-Cal

    tan-1=43\9.3

    asked by Anonymous
  237. maths---urgently needed

    range of sin(siny) +cos(siny)

    asked by Anonymous
  238. life orientation

    5 ways in which the human or environmental problem impacts on the community .provide relevant sources to support your claims.

    asked by mahlatse
  239. agricultural science

    Outline and explain the objectives fencing a farm land

    asked by TLOTLO MANANKE
  240. Calculus

    find the equation of the tangent line to the graph of y= f(x) = ln (x)/x at the point (1,0)

    asked by Emma
  241. islah publek school

    a rectangular garden has a perimeter of 140m.its width is three quarter of its length. what is the length and width?

    asked by nia biscraft
  242. math

    In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is $5.75. How many nickels are there in the collection ?

    asked by Anonymous
  243. life orientation

    List 5 ways in which homelessness is problematic to the community

    asked by shikgofatso
  244. math

    Find f’(x) if f(x) = 3^g(x) where g(x) = LOG_3(x^2 - √x + 4/x + 10*LOG_e(x))

    asked by Sunny
  245. Math

    67 4/7 - 17 How do do this one? Do I need to bother because the fraction has nothing to subtract with but the whole numbers do

    asked by Jerald
  246. life orientation

    ways in which one can take responsibility to provide safe and healthy living environment

    asked by gabby
  247. physics urgent

    a metal sample carrying a current along X-axis with density Jx is subjected to a magnetis field Bz(along z-axis). the electric field Ey developed along Y-axis is directly proportional to Jx as well as Bz. the constant of propotionality has SI unit. 1.

    asked by akanksha
  248. hiv/aids management)

    discuss the benefits and drawbacks of having a vegetarian diet for people with aids.

    asked by kelly t
  249. Math

    If you have 25 poles at 24'' foot long and your cut the poles 7'' 7/8 how many posts would you have altogether

    asked by Angel
  250. science

    why is a blue star cuz of temperatuure or location

    asked by aa
  251. math

    At the Had Matter's coffee party, he has 11 different types of cups, and 6 different types of ground coffee beans. The Had Matter insists that no two people who attend his party can be drinking from the same type of cup with the same type of ground coffee

    asked by maths......
  252. math

    If the length of a rectangle is 4 more than 3 times the width, and the perimeter is 32 meters, what are its dimensions? Please enter your answer as two numbers without the units, separated by a comma.

    asked by mike
  253. life orientation

    describe the life style disease / behaviour and explain 5 or more factor that contribute to the disease

    asked by Anonymous
  254. math

    what is the literal equation for v+f-e=2

    asked by Anonymous
  255. Math

    using the expression area of a circle = 3.14r^2 detemine how much of the floor in Barbara's room will be covered by a rug with a diameter of 8 ft. I know the answer is 50.24 ft but I wasn't sure if I'm supposed to write it as 50.24 ft. or 50.24 ft^2

    asked by Brandi
  256. business studies

    explain the different types of investments

    asked by masilela