Questions Asked on
April 25, 2013

  1. Physics

    The lowest frequency in the audible range is 20Hz. A)What is the length of the shortest open-open tube needed to produce this frequency? B)What is the length of the shortest open-closed tube needed to produce this frequency?

    asked by Zach Neal
  2. Chemistry

    Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.140 M HClO(aq) with 0.140 M KOH(aq).HClO is a weak acid with a Ka of 4.0× 10–8. It reacts with strong base to produce ClO–. (e) after addition of 60.0 mL of KOH

    asked by Emma
  3. chemistry

    the amount of K2Cr2O7 required to prepare 100ml of its 0.05N solution

    asked by saba anjum
  4. math help please ASAP

    2. Identify the sequence as arithmetic, geometric, or neither. 1.6, 0.8, 0.4, 0.2, . . . (1 point) arithmetic geometric neither 3. 5 • 3^n (1 point) 15, 30, 45, 60 5, 15, 45, 135 0, 15, 45, 135 15, 45, 135, 405 4. Use the function rule ƒ(x) = n •

    asked by Delilah
  5. chemistry

    how many moles of gold are there in 1.00 L of seawater if there are 1.50^17 atoms of gold in the sample?

    asked by Tina
  6. algebra 1

    1) the width of a rectangle is 33 centimeters. the perimeter is at least 776 centimeters. write an inequality to find the length of the rectangle. a. 33+ L≤ 776 b. 33+L≥776 c. 2(33)+2L≤776 d. 2(33)+2L≥776 D

    asked by hips
  7. spanish

    12. Tell what the following people will do tomorrow by changing the verb in the following statement to the future tense. Write the new verb in the blank. Ellos van a la playa.

    asked by Frank
  8. thermodynamics

    A fluid moves in a steady flow manner between two sections ina flow line. At section 1: A1=10ft2, v1=100ft/min, specificvolume1= 4ft3/lb. At section 2: A2=2ft2, density 2= 0.20 lb/ft3.Calculate the mass flow rate and speed at section 2.

    asked by olbap
  9. chemistry

    A 45 g block of aluminum initially at 28.0° C absorbs 548 J of heat. What is the final temperature of the aluminum? The specific heat of aluminum is 0.902 J/g °C.

    asked by University of Louisiana at Lafayette
  10. physics

    Four charges are placed at the four corners of a square of side 15 cm.The charges on the upper left and right corners are +3 uC and -6 uC respectively. The charges on the lower left and right corners are -2.4uC and-9 uC respectively. The net force on -6uC

    asked by daryl
  11. science

    Calculate the heat of combustion of candle wax in kJ/mole. The standard heat of formation (∆Hf ) of candle wax (C20H42) is -2230 kJ/mole. The standard heat of formation (∆Hf ) of carbon dioxide is -394 kJ/mole. The standard heat of formation (∆Hf )

    asked by emma
  12. chemistry

    At 25 °C only 0.0390 mol of the generic salt AB3 is soluble in 1.00 L of water. What is the Ksp of the salt at 25 °C?

    asked by madeline
  13. chemistry

    To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 16.0 g, and its initial temperature is -10.4 °C. The water resulting from the melted ice reaches the temperature of your skin, 28.3 °C. How much

    asked by Audre
  14. algebra 1 help

    3) the ideal width of a safety belt strap for a certain automobile is 5 cm. an actual width can vary by at most 0.35 cm. write an absolute value inequality for the range of acceptable widths. a. |w+5|≤ 0.35 b. |w-0.35| ≤ 5 c. |w+0.35|≤ 5 d.

    asked by hips
  15. algebra 1 help please

    4) a student score is 83 and 91 on her first two quizzes. write and solve a compound inequality to find possible values for a thord quiz score that would give anverage between 85 and 90. a. 85≤83+91+n/3 ≤90; 81≤n≤96 b. 85≤83+91/2+n≤90;

    asked by hips
  16. CHEM-PLEASE HELP

    Calculate the molar solubility of silver chloride (AgCl) in: a-deionized water and b-.20M NaCl solution Given Ksp=1.6*10^-10

    asked by JO
  17. math

    a potato chip manufacturer has been accused of shortchanging their customers with 10 ouce of bags potato chips. a sample of 50 of that company's 10 ounce bags was take, and it was found that the average weight was 9.8 ounces with a standard deviation of

    asked by kiki
  18. Financial Accounting 1

    Maximus Dog Company purchased a new supply van on January 1, 2011, for $35,000. The van is estimated to last for five years and will then be sold, at which time it should be worth approximately $5,000. The company uses straight- line depreciation and has a

    asked by Anonymous
  19. Physics

    A hot-air balloon is rising upwards at a constant velocity of 5m.s . When the balloon is 100m above the ground , a sandbag is dropped from it. Will the velocity of the hot-air balloon increase , decrease or remain the same immediately after the sandbag has

    asked by Lesiba
  20. Investments

    At the end of each year a self-employed person deposits $1,500 in a retirement account that earns 10 percent annually. a) How much will be in the account when the individual retired at the age of 65 if the contribution start when the person is 45 years

    asked by carolyn
  21. Math

    A lot is in the shape of a trapezoid. The sum of the bases is 180 feet. If the area of the lot is 8,100 square feet, what is the distance across the lot, i.e. the altitude of the figure? The altitude of the trapezoid is __ feet.

    asked by Joe
  22. math hw (algebra)

    On the sidewalk the distance from the dormitory to the cafeteria is 400 meters. By cutting across the lawn, the walking distance is shortened to 300 meters. how long is each part of the L shaped sidewalk?

    asked by danielle
  23. Physics

    A certain type of laser emits light that has a frequency of 4.7 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.8 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water.

    asked by Anonymous
  24. Chemistry

    Ethanol (C2H5OH) has been produced since antiquity by the fermentation of fruits and vegetables. Given the following data, if 5.87 kJ of energy are transferred to 13.3 g of frozen ethanol at -130.0 °C, what is the final temperature of the sample? Heat

    asked by Johnny
  25. math

    a student drop a rubber ball from a height of 8 feet . Each time the ball hits the ground, it bounces to 75% of its previous height. a/ how far does the ball travel between tne second and third bounces . b/ write an infinite series to model the total

    asked by long nguyen
  26. Calc

    A video games shop is analyzing its sales performance using matrices. Matrix A contains the unit sales data for each product category (horizontally) per week (vertically). Matrix B contains the unit sales data for weekends for each category (horizontally)

    asked by Chris
  27. calculus

    A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?

    asked by lisa
  28. physics

    At the instant a race began, a 74.0 kg sprinter exerted a force of 850 N on the starting block at a 23.0 degree angle with respect to the ground. what was the horizontal acceleration of the sprinter?

    asked by naja
  29. Financial Accounting

    E3-30A. Account for depreciation expense. (LO 1, 3). Maximus Dog Company purchased a new supply van on January 1, 2011, for $35,000. The van is estimated to last for five years and will then be sold, at which time it should be worth approximately $5,000.

    asked by Anonymous
  30. physics

    A heat engine absorbs 848 J of energy per cycle from a high-temperature source. The engine does 417 J of work during each cycle, expelling 431 J as heat. What is the engine’s efficiency?

    asked by Anonymous
  31. language arts Ms. Sue please

    1. Which of the following is an example of metaphor? (1 point) an overwhelming wave of embarrassment as harmless as a newborn chick a hissing and slithering snake 2. When writing a poem, sensory details are used to (1 point) compare two unlike things or

    asked by Delilah
  32. physics

    For the following three vectors, what is 3C·(2A multiplied by Bvec)? A = 2.00ihat + 3.00jhat - 6.00khat Bvec = -3.00ihat + 3.00jhat + 2.00khat C = 9.00ihat - 8.00jhat

    asked by tae
  33. Chemistry

    Lithium metal is a highly reactive metal that oxidizes instantly in water or air. Given the data below, calculate the energy required to heat 10.0 g of Li from 150.0 °C to 200.0 °C. Molar heat capacity (solid) = 3.58 J/°C • mol Molar heat capacity

    asked by Johnny
  34. Math

    I can't remember how to do simplifying algebraic expressions can anyone help me?

    asked by Ashley
  35. English-Room 101 speech

    PLEASE REPLY ON MY OTHER QUESTION BELOW. MY HOMEWORK IS DUE IN TOMMMORW. I FORGOT TO MENTION THAT I STILL HELP ON MY LAST IDEA!!!

    asked by HS
  36. Physics

    An object of mass 20kg slides down an inclined plane at an angle of 30 degree to the horizontal. The coefficient of static friction is?

    asked by Sbjjayo
  37. Solid mensuration

    The bases of a triangular right prism are apart. find the volume and the total surface area of the prism if one side of the quilateral triangular base measures 6cm

    asked by Allen
  38. Math

    A gardener is installing a circular garden. The radius of the circle 28 feet. He needs to know the circumference in order to buy materials for the edging. What is the circumference if he uses = . The circumference is __ feet

    asked by Joe
  39. Calc

    In the first three days of its launch, the Galaxy Music Store sold 14 CDs of album x, 8 of album y, and 6 of album z through Branch A. Through Branch B, the store sold 7 CDs of album x, 13 of album y, and 4 of album z. Branch C sold 2 CDs of album x, 11 of

    asked by Chris
  40. algebra 1

    the french club is sponsering a bake sale. they spent $77 in supplies. if their goal is to raise at least $140 how many pastries must they sell at $3.50 each in order to meet the goal. write and solve an inequality. a. 140p-77≥ 3.50;p≥ 0.5 b.

    asked by hips
  41. Science Check answer

    ******I WILL GIVE MY ANSWERS AFTER I POST THE QUESTIONS****** 1. Momentum is a measure of ____. how hard it is to stop an object the amount of matter in an object the tendency of an object to change its motion the amount of force acting on an object Use

    asked by Jman
  42. Statistics

    To test H0:  = 80 versus H1:  < 80. a simple random sample of size n = 22 is obtained from a population that is known to be normally distributed. a) If ¯x = 76.9 and s = 8.5, compute the test statistic.

    asked by Ted
  43. English

    Choose which sentence is correctly punctuated. A."What kind of fruit," asked Betsy, "bears its seed on the outside"? B."What kind of fruit," asked Betsy, "bears its seed on the outside?" Ithink it is A...?

    asked by Cassie
  44. Calculus

    A company manufactures widgets. The daily marginal cost to produce x widgets is found to be C'(x) = 0.000009x^2 - 0.009x + 8 (measured in dollars per unit). The daily fixed costs are found to be $120. a. Use this information to get a general cost function

    asked by Roland
  45. German

    Decide if the following sentence is grammatically CORRECT or INCORRECT. Er musste gesungen. incorrect correct

    asked by bubbie
  46. chemistry

    A compound was found to be composed of the following amounts of elements: 20.00% wt% C, 26.64wt% O, 46.65 wt%N, and 6.71wt%H. A 6.125 grams sample of this compound dissolved in 46.205 grams of water as a solution was found to have a freezing point of

    asked by lucy
  47. Chemistry

    Calculate the H3O concentration if 100.0 ml of the .10M HNO3 solution is diluted to 1.0L with water?

    asked by Kim
  48. English-Room 101 speech

    I have to come up with a speech about what I feel should go into room 101. Room 101 is a british tv programme, which came from a book. It's basically when people give reasons of what they don't like. The presenter decides, what goes into room 101. I am

    asked by HS
  49. physics

    What is the centripetal force of an object undergoing uniform circular motion when its radius is doubled and its speed remains constant?

    asked by Anonymous
  50. Physics

    In grandpa’s time automobiles were previously manufactured to be as rigid as possible, whereas autos are now designed to crumple upon impact. Why? Please help; Thank you in advance for the help...

    asked by Chris
  51. calculus

    A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?

    asked by lisa
  52. physics

    The magnetic force on a straight 0.36 m segment of wire carrying a current of 4.5 A is 0.38 N. What is the magnitude of the component of the magnetic field that is perpendicular to the wire? Answer in units of T

    asked by Anonymous
  53. geometry

    you plan to carpet 468ft of space. carpet costs $26.75 per square yard and the tax is 7%. the carpet is sold in 12 ft rolls. what is the cost of the carpet?

    asked by ALICE
  54. Physics

    When a cannon with a longer barrel is fired, the force of expanding gases acts on the cannonball for a longer distance. What effect does this have on the velocity of the emerging cannonball? (Do you see why long-range cannons have such long barrels?)

    asked by Chris
  55. Physics

    Suppose that a police car on the highway is moving to the right at 27 m/s, while a speeder is coming up from almost directly behind at a speed of 35 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

    asked by Anonymous
  56. Probabilities

    Bibi wants to send invitations to some of her friends to come to her birthday party. She has contact information for 37 friends stored on her phone, but she only wants to invite 21 of those people to her party. She tries to send out a message to the 21

    asked by Andy
  57. chemisrty

    A 21.00 sample of 0.3254M Hcl solution requires 26.09 ml of NaOH solution for complete neutralization. Calculate the volume of NaOH solution in liters, required for the titration.

    asked by ashley
  58. English

    Word bank beacon berserk celestial chasten confiscate data detract encounter epic pantomime pessimist precaution prosecute puncture retaliate sham uncouth underscore wholesome wistful 1.The police have done their job in arresting the suspect; now it is up

    asked by Jerald
  59. Chem--PLEASE HELP 911

    Balance the following redox reaction and identify the oxidizing and reducing agents A- Fe2+(aq) + Cr2072-(aq) -->Fe3+(aq) + Cr3+(aq) (acidic) B- N2H4(g) + ClO3-(aq) -->NO2(g) + Cl- (basic)

    asked by JO
  60. Child development

    Eva play near other children with similr material but doesn't try to influence their behavior , she 's involved in A. nonsocial B. Associative play c. parallel play d. cooperative

    asked by Alston
  61. Math

    Can anyone help me on simplifying algebraic expressions like this one 7(7+5f)+(f+6)10 It has been a while since I learned this so I don't remember this

    asked by Anonymous
  62. Chemistry

    N-type silicon (Si) has been produced by doping with phosphorus (P). The charge-carrier population based on electrical conductivity measurments is determined to be 3.091*10^17 carriers/cm3 at room temperature. 1. Calculate the doping level of P (how much P

    asked by Alan
  63. Physics

    An electron in the c level of a mercury atom returns to the ground state. Which photon energy could not be emitted by the atom during this process?

    asked by Shannon
  64. Chemistry

    What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.60 × 10-3 M Ag ? The Ksp is 8.46×10–12.

    asked by Alyssa
  65. Chemistry

    What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.60 × 10-3 M Ag ? The Ksp is 8.46×10–12.

    asked by Anonymous
  66. Physics

    To combat wasteful habits, we often speak of “conserving energy,” by which we mean turning off lights, heating or cooling systems, and hot water when not being used. In this chapter, we also speak of “energy conservation.” Distinguish between these

    asked by Chris
  67. Algebra

    Predict value of x in table In 0,2,8,10,18 Out 5,11,29,x,59

    asked by Sandra
  68. College Physics

    The rectangular coils in a 201-turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.81 T? I'm not sure what equations to use.

    asked by Valerie
  69. Solve the following polynomial equati

    Solve the following polynomial equation for x : x^2 - 2( a+2)x + (a + 1)(a + 3).

    asked by Bob
  70. math

    Triangle XYZ with vertices X(3,-1) Y(7,-3)Z(3,-5) undergoes an enlargement represented by the mapping: (x)--(-0.5 0)(x) +(-3) (y)--( 0 -0.5)(y) +(4) Evaluate: 1. The vertices of the image of triangle XYZ. 2. The centre of enlargement PS. The small brackets

    asked by lindsay
  71. Physics

    A massless spring with spring constant 17.1 N/m hangs vertically. A body of mass 0.210 kg is attached to its free end and then released. Assume that the spring was unstretched before the body was released. What is the amplitude of the resulting motion?

    asked by DL
  72. Chemistry

    Balance the following redox reaction and identify the oxidizing and reducing agents A- Fe2+(aq) + Cr2072-(aq) -->Fe3+(aq) + Cr3+(aq) (acidic) B- N2H4(g) + ClO3-(aq) -->NO2(g) + Cl- (basic)

    asked by jo
  73. chemistry

    A 13.8 g piece of Zn metal was heated to 98.6 oC and then dropped in 45.6 g of water at 25.0 oC. Assuming that no heat is lost to the surroundings, determine the specific heat capacity of Zn if the final temperature of the water was 27.1 oC C=6461.39

    asked by Chade
  74. physics

    What is the angular momentum (in kilogram-meter^2/second) of a 500.0 g ball rotating on the end of a string in a circle of radius 1.54 m at an angular speed of 2.50 rad/s?

    asked by BG
  75. Math

    My home work asks "what is the five number summery of a datta set? How is it used to mAke a box plot?" But i frogot what a five number summery is please help.

    asked by Magiemay
  76. English

    Word box beacon berserk celestial chasten confiscate data detract encounter epic pantomime pessimist precaution prosecute puncture retaliate sham uncouth underscore wholesome wistful 13.So there I was with a(n) ___ in one of my rear tires, on a lonely

    asked by Jerald
  77. English

    1.The youth center that the charity organized was like a (precaution beacon) to many young people desperately needing help and guidance. precaution 2.The child gazed (wistfully wholesomely) at the shiny toys in the store window. wistfully 3.Is it right to

    asked by Jerald
  78. English

    13.The trouble with being a(n) (underscore pessimist) is that you are so taken up with what is going wrong that you are unaware of what is going right pessimist 14.It does not (prosecute detract) in the least from his reputation as a great player to say

    asked by Jerald
  79. math

    A rectangular plot is bounded at the back by a river. No fencing is needed along the river and there is to be an opening in front of about 24 meters. If the cost of fencing in front is $1500 per meter and the cost of fencing the sides is $1000 per meter,

    asked by natasha
  80. us history

    many settlers moved west in search of

    asked by kwan
  81. Statistics

    A school is running a raffle. There are 100 tickets, of which 3 are winners. You can assume that tickets are sold by drawing at random without replacement from the available tickets. Teacher X buys 10 raffle tickets, and so does Teacher Y. Find the chance

    asked by XYZ
  82. Math

    How do you find the length of the base of a triangle? My math problem is: The area of a triangle is 33.6 inches. If the height is 4 inches what is the length of the base? thank you

    asked by John
  83. Chemistry

    Calculate the concentration of bromocresol green (BG) indicator It says that Molar absorptivity = Absorbance at a wavelength/ concentration of BG indicator I am having trouble calculating the concentration of BG. Other info: Stock solution of BG = 80.0

    asked by Catherine
  84. Physics

    A massless spring with spring constant 17.1 N/m hangs vertically. A body of mass 0.210 kg is attached to its free end and then released. Assume that the spring was unstretched before the body was released. How far below the initial position does the body

    asked by Anonymous
  85. Chemistry

    A mass of a copper oxide weighed 10.00grams. The reaction was run and the amount of just copper obtained was 8.88grams. What is the empirical formula of the compound?

    asked by Samantha
  86. Calculus

    Find the limit as x approaches infinity of (lnx)^(1/x). This unit is on L'Hopital's rule. I know that the answer is 1, I just don't know how to get there. I tried taking the ln of everything so that you have ln(the whole limit) = limx-->infinity

    asked by Hannah
  87. math pre calc

    at the pittsburch zoo, children ride a train for 25 cents, adults pay $1 and seniors pay .75. on a given day, 1400 passengers paid a total of $740 for the rides. there were 250 more children riders than adults and senior riders combined.find the nu,ber of

    asked by JT
  88. physics

    A proton moves perpendicularly to a magnetic field that has a magnitude of 1.22×10−2 T. The charge on a proton is 1.60×10−19 C. What is the speed of the particle if the magnitude of the magnetic force on it is 4.79× 10−14N? Answer in units of m/s

    asked by Anonymous
  89. Chemistry

    A sample of molybdenum (Mo) is analyzed by x-ray diffraction using NiKα radiation. Calculate the value of the angle at which the lowest-angle reflection is observed. Express your answer in degrees:

    asked by Anonymous
  90. math

    If 2p-4p-2r is what

    asked by bukeka
  91. German (i need help quickly, please)

    If a vowel changes in a verb when it is conjugated (e.g. a --> ä, e --> ie, etc.), what kind of verb is it? weak strong modal helping

    asked by bubbie
  92. Physics

    A particle with a charge of 31 µC moves with a speed of 62 m/s in the positive x-direction. The magnetic field in this region of space has a component of 0.50 T in the positive y-direction, and a component of 0.61 T in the positive z-direction. What is

    asked by Valerie
  93. English

    I have these words left beacon celestial detract precaution retaliate sham uncouth wholesome wistful 2.Though many people doubted that the new program would do any real good, I thought it was a very ___ development wholesome

    asked by Jerald
  94. physics

    two charges originally separated by 10cm are moved further apart untill the force between them has decreased by a factor of 10. How far apart are these charges?

    asked by radiant
  95. Math

    Five red cards numbered 1,2,3,4,5 and two black cards both numbered 5 are randomly ordered face-down into a pile. The cards are flipped over one at a time until either the sum of the numbers on the red cards is at least 10, or the sum of the numbers on the

    asked by Zeneth
  96. Algebra

    Simplify the expression: (w+5)^2 My answer: w^2+25

    asked by Tara
  97. pharmacy informatics

    can you give me 1 journal article that deals with pharmacoeconomics study?

    asked by PLEASSSEEE HELP MEE
  98. math

    Helen determined she walks about 1,800 steps per 4/5 of a mile. How many steps did she take if she walked 3 miles

    asked by sese
  99. science

    What is the molality of 5.4g of potassium chloride (KCl) dissolved in 250 g of water?

    asked by Anonymous
  100. Chemistry

    What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.60 × 10-3 M Ag ? The Ksp is 8.46×10–12.

    asked by Anonymous
  101. English

    Words left beacon celestial detract precaution retaliate sham uncouth wistful 17.Before we use the blowtorch in our industrial arts class we are required to take the ___ of wearing goggles precaution

    asked by Jerald
  102. statistics

    All deal with a random variable X that follows a normal probability distribution with mean equal to 37 and a standard deviation of 5. Compute P(X < 39) Compute P(X < 29 or X > 41) Compute P(X > 30) Find the 42nd percentile for this distribution.

    asked by luke
  103. algebra 1 help

    3) the ideal width of a safety belt strap for a certain automobile is 5 cm. an actual width can vary by at most 0.35 cm. write an absolute value inequality for the range of acceptable widths. a. |w+5|≤ 0.35 b. |w-0.35| ≤ 5 c. |w+0.35|≤ 5 d.

    asked by hips
  104. Art

    Does this sentence flow? Word does not like can be recognized says it sounds passive. The logo design is created for religious organizations for letterhead, advertising material, by which the organization can be recognized.

    asked by Journey
  105. Life orientation

    Identify human factor that causes ill health,accidents,crises and disaster within south africa

    asked by Adolph
  106. College Physics

    A speck of charged dust with a mass of 39mu g. is kept levitating by putting it in an electric field. If you must apply a field of 10 N/C to keep it suspended in mid-air, what is the charge on the speck of dust? Can someone please help soon? I got this

    asked by Valerie
  107. help

    Mexico's heartland region is dominated by

    asked by ann petra
  108. Right angle trigonometry

    A sailor sights both the bottom and top of a lighthouse that is 20 and m high and which stands on the edge of a cliff. The two angles of elevation are 3 and 42. To the nearest meter, how far is the boat from the cliff?

    asked by Kayla
  109. physics

    In one of Michelson's experiments, a beam from a revolving mirror traveled 12 km to a stationary mirror. How long a time interval elapsed before the beam returned to the mirror?

    asked by tasha
  110. physical science

    plan,design and condact an investigation to find out whether the amount of heat produced will depend on an increase on the concentration of HCl when HCl reacts with an excess Zn.

    asked by kholofelo
  111. physics

    A particle moves through an xyz coordinate system while a force acts on it. When the particle has the position vector vector r = (2.00 m)ihat - (3.00 m)jhat + (2.00 m)khat, the force is vector F = Fxihat + (7.00 N)jhat - (5.30 N)khat and the corresponding

    asked by tae
  112. physics - stopping distance

    when a driver brings a car to a stop by breaki.g as hard as possible the stopping can be regarded as the sum of reaction distance and breaking distance. tje following data are given, v1 m/s contains 10,20,30. reaction distance are 7.5, 15, 22.5. the

    asked by gladys
  113. chemistry

    Calculate the molar solubility of silver chloride (AgCl) in: a-deionized water and b-.20M NaCl solution Given Ksp=1.6*10^-10 please show work.

    asked by jo
  114. math (algebra)

    An auto dealer wants to string a wire from the top of a pole to the ground and hang colorful pennants from it. The distance from the base of the pole to the point where the wire is attached to the ground is 3 times the height of the pole. If the wire is 63

    asked by danielle
  115. Physics/Astronomy

    A pulsar is a stellar object that emits light in short bursts. Suppose a pulsar with a speed of 0.975c approaches Earth, and a rocket with a speed of 0.999c heads toward the pulsar (both speeds measured in Earth’s frame of reference). If the pulsar emits

    asked by Kim
  116. life orietation

    Critically discuss 6 ways in which the envirinmental health hazard can impact negatively on one's health

    asked by cynthia gabisile siluma
  117. MATH

    If you flip a coin 9 times and get 9 heads the probability of getting a head on the next toss would be 1/2. Explain how it is 1/2.

    asked by Angela
  118. Math

    Write a situation that can be represented by 6n+4.

    asked by Brooke
  119. life orientation

    Provide recommendations on how to adress The topic that you identified in the previous question

    asked by nandi
  120. Physics

    A particle with a charge of 31 µC moves with a speed of 62 m/s in the positive x-direction. The magnetic field in this region of space has a component of 0.50 T in the positive y-direction, and a component of 0.61 T in the positive z-direction. What is

    asked by Valerie
  121. english home language literature

    What does the opening sentence imply about Gatsby's parties?

    asked by Lee
  122. Analytical Chem.

    You collected a water sample from your shower containing (3.2 mM Ca2+)+(1.1 Mm Mg2+). Express the hardness of water in terms of mg CaCO3/L. (FM for CaCO3+100.09) I have no idea how to do this problem. Can anyone show me a step by step on how to work

    asked by Leisle
  123. please help geometry

    you need to find the length of a broken automitive belt. the belt ran around 2 pulleys whose centers were 11 in apart. one of the pulleys is 4" dia. and the other is 6" dia. what is the totoal length of the belt needed to connect thr pulleys?

    asked by ALICE
  124. geometry

    the bore of an engine cyclinder is the diameter of the piston and the stroke is the distance that the piston will travel up the cyclinder wall. The displacement is the volume of space that the piston goes thru. If the piston is 3.97" in dia. and the stroke

    asked by ALICE
  125. Math

    If the probability of an event happening is 2/5, then the probability of the event not happening is 3/5? This is False. The answer is 1/3. Explain why the answer is 1/3

    asked by joyce
  126. physics

    an airplane taking off from a landing field has a run of 500m. Calculate the average acceleration in ft/s2.

    asked by kima
  127. Physics

    17. Potential due to a point charge: What is the electric potential 17.0 cm from a 3.50 μC point charge?

    asked by Lex
  128. math

    9 subtracted from 2 less than the product of 4 and 8

    asked by khusbu thapa
  129. Math Algebra

    Find a polynomial p(x) with real coefficients having the given zeros. 6,-14, and 4+3i

    asked by :D
  130. math pre calc

    solve for X marticies 2 0 5 4 -1 3 =2 6 x -7

    asked by JT
  131. math

    If the probability of an event happening is 2/5, then the probability of the event not happening is 3/5? This is False. The answer is 1/3. Explain why the answer is 1/3

    asked by greg
  132. physics

    Two identical superconducting rings are brought very close to each other (see the image below). The currents in the rings are equal to I,=0.05 A. Determine the the current I in Amps in the rings if we separate them far apart.

    asked by er
  133. Physics

    Why bother using a machine if it cannot multiply work input to achieve greater work output? Please help; need a original answer no Google search. Thank you in advance...

    asked by Chris
  134. Math Algebra

    Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function. 1. 9x^6-5x^4-2x^3+8x^2-4x=0 2. -9x^4+5x^3-2x^2+4x-3=0

    asked by :D
  135. Math

    A building casts a shadow that is 8ft long. How tall is the building?

    asked by Debra
  136. Physics

    A park ranger wants to shoot a monkey hanging from a branch of a tree with a tranquilizing dart. The ranger aims directly at the monkey, not realizing that the dart will follow a parabolic path and thus will fall below the monkey. The monkey, however, sees

    asked by Chris
  137. Science

    What would the nucleus and the nucleolus on a farm be? and please explain why. thanks

    asked by Mia URGENT! I AM DESPERATE
  138. Aerospace

    In case you didn't already know VASTS has to do with aerospace and what not...this was one of the questions on our discussion forum....this is exactly what it says-- Rags, tie wraps, and safety wire are examples of ______ contamination? ....there was a

    asked by red
  139. Math

    Angela measured 2 trees in her front yard.Tree A is 5m. Tree B is 200 cm taller than tree A. How tall is tree B

    asked by Lexi
  140. Calc

    Which expression is equivalent to (sin x + 1)(sin x − 1)? A. cos2^x B. -cos2^x C. cos2^x + 1 D. cos^2x − 1 E. -cos^2x + 1

    asked by Chris
  141. math

    Triangle XYZ with vertices X(3,-1) Y(7,-3)Z(3,-5) undergoes an enlargement represented by the mapping: x

    asked by lindsay
  142. physics

    If d1 = 7 ihat - 2 jhat + 4 khat and d2 = -5 ihat + 2 jhat - khat, then what is (d1 + d2)·(d1 multiplied by 6 d2)?

    asked by tae
  143. social studies

    Why should slaves have less hours to work? REMEMBER THINK LIKE A PERSON FROM 1855!!

    asked by Aleyshka
  144. Math

    There is a mathematical relationship between an airplane’s weight x and the runway length required at takeoff. For certain types of airplanes, the minimum runway length L in thousands of feet may be modeled by L(x) = 1.3 ln x, where x is in thousands of

    asked by Tamie
  145. math for Ms. Sue

    The fifth grade marching band includes boys and girls. There are 28 boys in the marching band. The 28 boys are 7/10 of the students in the marching band. a. What fraction of the students n the marching band are girls? b. What is the total number of

    asked by Anonymous
  146. Math

    Tammy drew a scale drawing of a house. The scale she used was 14 millimeters = 5 meters. The actual length of the garage is 15 meters. How long is the garage in the drawing?

    asked by Jasmine
  147. chemistry

    a sample of argon gas at standard pressure ocupies 100ml. at constant temp, what volume does the gas occupy if the temp increases to 800mmHg

    asked by Deveigh
  148. Science

    I'm studding forces and motion what is the difference between velocity and speed.Thanks if you help:)

    asked by Kim
  149. English

    In 1m:15 line critically discuss 5 way in which the human or environmental problem impacts on the community about poverty in the community

    asked by Anonymous
  150. algebra 1

    a+8-2(a-12)>0 do you do distributive property?

    asked by hips
  151. physics

    A 150 lb (68 kg) skier impacts a person who is standing at the bottom of the ski hill. If our skier began the descent at a height of 40 meters, how fast was our skier moving to the bottom of the hill?

    asked by Anonymous
  152. Chemistry

    Estimate the fraction of of unoccupied atomic sites in lead (Pb) at a temperature 10K below its melting point. DATA: Vacancy Fraction, nv/N T (degrees C) 1.8*10^-7 100 7.2*10^-6 200 Express your answer in terms of vacancy fraction, nv/N:

    asked by Anonymous
  153. science

    what are some characteristics bacteria have which viruses don't?

    asked by Anonymous
  154. calculus

    39x + 75y over the square root of 97 =650 how do I solve this?

    asked by Cynthia
  155. Life orientation

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

    asked by Mulondo lawrence
  156. statistics

    The duration of time it takes General Motors to build a car is normally distributed with a mean of 31 hours and a standard deviation of 2 hours. a) What is the probability that a single car, selected at random, will take between 28 and 34 hours? b) What is

    asked by kevin
  157. Math

    Ben conserves water in his home.He conserves 3 gallons each time he turns off the faucet when brushing his teeth.He conserves 30 gallons by running the dishwasher once a day instead of twice a day. What expression represents the total number of

    asked by Brooke
  158. Physics

    An athlete use his last 0.9s to jump from 40m to another position of 44m of a race.Find the linear acceleration of the athlete if it is assumed to be constant

    asked by Brabus
  159. Math

    one integer is 5 less than another. Find the number if the sum of their reciprocals is 17/66?

    asked by Mke
  160. Ms.Sue

    Can you please help me?I think the first question I posted the answer is 3G+30

    asked by Brooke
  161. Math

    How do you find the equation of a line with a slope of 2 and containing the points 1,5

    asked by Emily
  162. tshiawelo

    name 5 ways in which the human or enviromental problem impact on the community about teenage pregnancy

    asked by ndivhuwo
  163. Life orientation

    Name two institution or community organization that are involved in water pollution

    asked by Glen
  164. Maths

    a and b are consecutive, positive integers such that (a+b)*(a-b)>22. What is the minimum possible value of a+b?

    asked by Anonymous
  165. maths

    In a recent election for class president, Monika received 7 of the 10 votes and Alfred received 3 of the 10 votes that were cast by the class. When the machine was counting the votes, it malfunctioned and instead of giving the vote to the correct person,

    asked by Anonymous
  166. logic

    ic Logic Write two arguments in English, one in the form of modus ponens and one in the form of modus tollens. Then, write the arguments in symbols using sentence letters and truth-functional

    asked by yolanda
  167. busuness Ethics and starting a Small B usiness

    according to your text,ur main source of ethical standart are religion and

    asked by Anonymous
  168. Life orientation

    Name two community organizations that are involved in supporting these disaster of flood

    asked by Anonymous
  169. Math

    how can you go about in calculating vertical and horizontal asymptotes?

    asked by Vinny
  170. real estate finance

    1. Erin and Melissa have a combined annual gross income of $180,000. Their combined monthly long term debt is $900. What housing expense (mortgage payment) can they qualify for using standard Fannie/Freddie qualifying guidelines$______? What will be their

    asked by tmouery
  171. Math

    Find the smallest prime number N such that the following is true: The largest prime factor of N−1 is A; The largest prime factor of A−1 is B; The largest prime factor of B−1 is 7.

    asked by Zeneth
  172. geometry

    how many 3"x4"x6" boxes will fit in a 2'x3'x8' container?

    asked by ALICE
  173. Life orientation

    Human problem impacts on the community

    asked by Noun
  174. human life

    name all the health hazards

    asked by Anonymous
  175. Statistics

    Find the binominal probability...n = 15, p = .04, find P(fewer than 3)

    asked by Tangee
  176. Math

    Explain "the larger the denominator the smaller the fraction?"

    asked by Tina
  177. life orientation

    Identify3 environmntal health hazard

    asked by Anonymous
  178. life orientation

    5 factors that contribute to hiv aids

    asked by hope
  179. is this true algebra1

    -3x-8>13 = x>-7

    asked by hips
  180. math

    1 1 1 a b c a^2 b^2 c^2 Factorise the determinant

    asked by shaphuner
  181. math

    The function f(x)= ax^3 - bx +c passes through the origin, f(-1)=4/3 and it has an extreme point at x=1 (i) Find the values of a, b and c. (ii) Sketch the graph (iii) Find the area bounded by the graph of f(x) and the x-axis between the lines x=-1 and x=1

    asked by gibbs
  182. ALGEBRA!!!!

    How many distinct integer values of N between 1 and 1000 are there, such that N=4a+b+4c and 2N=7a+6b+7c for some positive integers a, b and c?

    asked by bob
  183. math

    Express (5x+2)/(2x-1)(x+1) into partial fractions and hence expand the expression as a series in ascending power of x giving the first 4 terms

    asked by mel gibbs
  184. life orientation

    In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community.

    asked by mpho
  185. Math

    Solve Square root of x+1= square root of 5x-9 Please help me solve this.

    asked by Kelley
  186. life orienation

    discuss 10 ways in which the environmental hazards can impact negatively on ones health

    asked by lwazikazi
  187. Life orientation

    5 human problems impact of flood on the community provide relevent sources to support your claim

    asked by Mak
  188. math-high school

    If the probability of an event happening is 2/5, then the probability of the event not happening is 3/5? This is False. The answer is 1/3. Explain why the answer is 1/3

    asked by rick
  189. philosophy

    I am to identify some of the features and values you associate with a just society. I want to write about affordable healthcare. Do you all think that this is a good topic. And how would I begin. I was thinking about addressing in terms of the Affordable

    asked by angela
  190. Financial Accounting

    Hobbs Company started the year with $6,000 of prepaid rent. Hobbs paid additional rent in advance amounting the $12,000. The rent expense for the year was $15,000. What was the balance in prepaid rent on the year-end balance sheet?

    asked by Anonymous
  191. math pre calc

    gaussian elimination x+Y+Z=-2 X-y+5z+22 5x+y+z=-22

    asked by JT
  192. Life orientation

    In 10-15 line critically discuss 5 ways in which the human problem impact on the communty.provide relevant source to support your claims.

    asked by Bongani
  193. science

    what pressure would be exerted by 35g of chlorine gas in a1.5 litre vessel at -37

    asked by tabisa
  194. algebra 1 help

    1)|J|/5+1=-4 a. no solution b. j=15 or -15 c. j=-25 d.j= -15 my answer is A 2) 1/6|4x-8|=6x a. x=-7, x=11 b. x=8/3, x=8/5 c. no solution d. x=-1/4, x=1/5 my answer is J

    asked by hips
  195. Physics SI unit

    • what is the SI unit for electric force ?

    asked by Isis
  196. statistics

    All deal with a random variable X that follows a normal probability distribution with mean equal to 37 and a standard deviation of 5. Compute P(X < 39) Compute P(X < 29 or X > 41) Compute P(X > 30) Find the 42nd percentile for this distribution.

    asked by luke
  197. L.O

    describe the dumping waste in particular solid wastes health hazards include evidence that is current of the dumping wastes

    asked by Anonymous
  198. Math

    What are three distinct numeric approaches for calculating the product 24x32?

    asked by Anna
  199. chemistry

    Given the thermochemical equation below, calculate the amount of energy released when 250. g of NaOH (molar mass = 40.0 g/mol) reacts with an excess of HCl. Report answer to the correct number of significant figures in units of kilojoules, kJ. NaOH + HCl

    asked by sarah
  200. Math

    What is 0.0185 as a fraction and a percent

    asked by Piper
  201. statistics

    out of ten questions two students got 8 wrong find out probability if they are cheating

    asked by john
  202. algebra 1 help

    5) give one solution to the inequality 12x-3x+11

    asked by hips
  203. English

    Does this sentence flow? Word does not like "can be recognized" it says it sounds passive. The logo design is created for religious organizations for letterhead, and advertising material, by which the organization can be recognized.

    asked by Journey
  204. test

    most people in Mexico live in

    asked by ann petra
  205. Life orientation

    five ways inwhich you critically how obesity impact on the teenager

    asked by Guccy
  206. Physics

    What would be the path of the Moon if somehow all gravitational forces on it vanished to zero? Please help; need an original answer no Google search. Thank you in advance...

    asked by Chris
  207. Physics

    What would be the path of the Moon if somehow all gravitational forces on it vanished to zero? Please help; need an original answer no Google search. Thank you in advance...

    asked by Chris
  208. Physics

    Why do the passengers in high-altitude jet planes feel the sensation of weight while passengers in the International Space Station do not? Please help; need an original answer no Google search. Thank you in advance...

    asked by Chris
  209. Life orientation

    Describe the life style disease/behaviour and explain 5 or more factors that contribute to the disease of substance abuse of both legal and illegal drugs among the youth

    asked by Selby
  210. math

    70% of 72=

    asked by lisa
  211. Paraphrasing

    Can you help me better paraphrase these sentences? Here are my somewhat-paraphrases, but they are still similar to the original source (the part not in parenthesis is the portion that needs to be better paraphrased): (This was because) Japan had a secret

    asked by Cicilia
  212. Life orientation

    5 ways in which the human or enviromental problem impacts on the community

    asked by Evans
  213. algebra

    find the theoretical probability of each outcome. 1. randomly choosing a day of the week and it is a weekend 4. randomly choosing the letter N from the letters in NUMBER 11. the probability of a thunderstorm is 80%. what are the odds that there will be a

    asked by s
  214. Mathematics-trigonometry

    If sin theta=24 divide by 25 and theta is acute..make use of a diagram to determine the value of 7(tanø-secø)

    asked by Thembisile
  215. l.o

    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 mpho
  216. Algebra

    {5x-4y=-21} {-2x+4y=18}

    asked by Ashley
  217. why

    Why is are economy so bad and no jobs and why are all girl's cloths inoproriat.

    asked by ann petra
  218. Maths Calculus

    We want to build a rectangular cardboard box with no top and of given volume V using the least quantity of cardboard. Find the length of the box's edges by fnding the minimum of the total surface function. Verify that the point you found is indeed a

    asked by Mohit
  219. Social Studies.. PLEASE HELP!! :(

    If you can change slavery and you chose to change the following: -Slaves should not be beaten -Less working hours -Treat slaves as citizens PART A: give an explain and/or reason why. PART B: Who would support this decision, North, South, West, or East?

    asked by Omario
  220. Phsycal science research

    10 ways in which the human or environmental problem impacts on the community about global warming

    asked by Phuti
  221. Algebra 1

    If the side of a rectangle measures 10.5 cm to the nearest millimeter,what is the upper bound and lower bound of the side of the rectangle?

    asked by Gloria
  222. chemistry

    calculate the hydroxide ion concentration in a solution of almond extract PH.3.8.state if almond is basic or acid

    asked by demi
  223. Math Please help ASAP

    how do you find the LCM (90, 120) by taking the quotient of the product of the numbers and divide by the greatest common factor of the numbers

    asked by Brain
  224. english

    Some ancient and medieval works have several qualities present in novels. true or false.

    asked by Melissa
  225. algebra 1

    (2x-1)/3 +3≤-4 or (8x-2)/2 -1≥6 a. x≤-10 or x≥2 b. x≤-4 or x≥9/8 c. x≤-2 or x≥2 d. x≥-10 or x≥2 i got a

    asked by hips
  226. math

    A water tank can be constructed with a metal top and two square ends that holds 16 cubic meter of water and requires 40 square meter of metal. find the dimensions of the water tank.

    asked by kgosi
  227. math

    4) what number makes this inequality equivalent -6v ; v>-0.5

    asked by hips
  228. algerba 1

    Solve by graphing 1. 2x2-7x+5=0 2. 2x2+x-6=0

    asked by kelly
  229. Science

    What are the diseases of the respiratory system?

    asked by lii
  230. Math, Calc

    Which rectangular equation corresponds to this set of parametric equations? x = t + 2 and y = t^2 + 3 A. y = (x − 2)^2 − 3 B. y = (x + 2)^2 + 3 C. y = (x − 2)^2 D. y = (x + 2)^2 − 3 E. y = (x − 2)^2 + 3

    asked by Chris
  231. mathematics

    Evluate Cos22,5'

    asked by ndangoz
  232. maths

    Triangle ABC has side lengths a,b and c. If these lengths satisfy a^2=a+2b+2c and −3=a+2b−2c, what is the measure (in degrees) of the largest angle?

    asked by maths lover
  233. Math

    What is the greatest number of points of intersection with three circles that have 6 intersections using four straight lines?

    asked by Elizabeth
  234. Calculus

    U substitution on indefinite integral/antiderivative. (t^3+4)^-2 t^2 On this should I use u on the parenthesis and should I put this into a natural log?

    asked by Beth
  235. Science

    During an experiment, you find that you can dissolve 3.6 g of a substance in 300 mL of water at 25°C. How much of the substance would you predict that you could dissolve in 600 mL of water at the same temperature? Can somebody help me with this? I don't

    asked by Rebecca
  236. Math

    A polymomial p(x) = ax^2 + bx + c where a, b, c are some rational, has 1 + root 3 as one of the zeros and also p (2) = - 2, Find values of a, b and c.

    asked by Bob
  237. Physics

    what force can cause the displacement of an object but does no work??

    asked by Kathryn
  238. science

    What is the time of life when sex organs mature.

    asked by Anonymous
  239. math

    6-4(3/10)=

    asked by kim
  240. A.P. Chemistry

    Thorium-232 undergoes alpha decay and has a half-life of 1.4 * 10^10 years. How long will it take for a 1.00mg sample of thorium-232 to be reduced to 0.5mg?

    asked by John
  241. math

    1(1/6) x 3/8=

    asked by kim
  242. agricultural science

    Outline and explain the objectives of fencing a farmland

    asked by Petunia Botha
  243. physics

    For the vectors in the figure below, with a = 8, b = 7, and c = 113, calculate the following dot products.

    asked by tae
  244. Calc

    If w = , find ||w||. A. 7 B. 17 C. 23 D.sqrt 7 E. sqrt 23

    asked by Chris
  245. 4 grade math

    If ms smith class read for 450hrs this month. Ms Brown class read two-thirds the number of hrs read by ms smith class. Ms James class read twice the hrs read by ms brown class. There are 90 students in these 3 classrooms. What was the average number of hrs

    asked by marsha
  246. Math

    6-4 3/10=

    asked by kim
  247. Math

    What is 1 5 of 20

    asked by Brian
  248. Finance

    1) A company wishes to issues bonds with a coupon rate of 5%. The company wishes to raise 100 million dollars net of commissions (5% of total sales). Each bond has a face value of $1,000 and matures in 10 years. Interest is to be paid semi-annually. Using

    asked by dpwnc
  249. Finance

    2) The company wishes to raise $100 million by issuing stock. The current market price is $15 per share, however, if issued the price will drop to $12.50 per share. How many shares will need to be issued if under writing is 5% per share? If there are

    asked by dpwnc
  250. Pre Algerbra

    I invested $3,000, part at 2% and the rest at 5% simple interest. After 1 year, I earned a total of $117 in interest. How much did I invest at each rate?

    asked by Dan
  251. L.O

    How can fire impact negatively on one's heath

    asked by thabo
  252. Physics

    A 1.10 N bird descends onto a branch that bends and goes into SHM with a period of 0.60 s. Determine the effective elastic force constant of the branch.

    asked by DL
  253. College math

    Three coins are tossed. How many ways are there to get more than 2 tails, exactly 2 heads, only 1 tail. Thanks in advance for the help!

    asked by Lorie
  254. algebra 1

    |2x+9|

    asked by hips
  255. Chemistry

    Solution A is 2.40M. 20mLs of solution A is transferred to a 250mL volumetric flask and diliuted to volume with water. What is the concentration of the diluted solution?

    asked by Jaime
  256. calculus

    Consider the region above the graph of y=x^2 and below the graph of y=x+2. What is the area of this region?

    asked by lisa
  257. chemestry

    if you dissolve 350 g of K(2)CrO(4)in 2.4 kg of water, what is the molality of the solution?

    asked by crystal
  258. L.o

    5 ways in which human or environmental problem impacts the community and explanation

    asked by Bongekile
  259. science

    imagine you are going swimming at night. you turn on the spotlights at the corners of your house. the lights are pointed towards the middle of the pool, which is right behind the center of your house. will the light rays from the spotlight be refracted

    asked by peaos
  260. Math

    Harry is 6 more than twice as old as Alex. How old is Harry if their combined age is 72 years old?

    asked by Anonymous
  261. algebra1

    the school bought a new copy machine which makes 20 copies per minute.the old machine makes 12 copies per minute.francine needs 1000 copies,so she uses both machines.how long will it take to have the copies

    asked by ryan
  262. life orientation

    Write a conclusion in which you explain in one.psrsgragrsph what you lernt doing this assignment lifestyle disease

    asked by nandi
  263. English

    What is a complex sentence for the word chagrin

    asked by Anonymous
  264. life orientation

    5 ways in which the human or invironmental problem impact on the community

    asked by katlego