1. Chemistry

    The vapor pressure, P, of a certain liquid was measured at two temperatures, T. Represented in a table: T (in Kelvin) ------- P(in kPa) [325] --------------- [4.00] [775] --------------- [8.59] What is the enthalpy of vaporization for this liquid? (Delta H

    asked by Eric on January 23, 2012
  2. math

    What is the union of the 4 half-planes determined by 2 intersecting lines. a. the entire plane b. the entire plane except for the two intersecting lines c. the entire plane except for one of the lines d. the entire plane except for the point of

    asked by Anonymous on November 6, 2018
  3. Math

    The cost for a business to make greeting cards can be divided into one-time cost (e.g., a printing machine) and repeated costs (e.g., ink and paper). Suppose the total cost to make 30 cards is $800, and the total cost to make 550 cards is $1,300. What is

    asked by Anonymous on October 21, 2015
  4. math

    I need help calculating (a) the total installment price. (b) the carrying charges, and (c) the number of months needed to save the money at the monthly rate to buy the item below for its cash price (remember to round up). A bike with a cash price of $500,

    asked by Carly on January 26, 2010
  5. Physics

    Why would normal force be set to zero to calculate the minimum possible speed a rider can have at the top of a loop. Please i need help, this is due in few hours

    asked by Ted on April 18, 2013
  6. stat

    Find the area under the standard normal curve to the left of z = 1.88, P(z < 1.88). (Give your answer correct to four decimal places.)

    asked by janet on July 7, 2012
  7. maths

    find equations for the tangent and the normal at P (1n2, 2k) on the curve with equation y=ke^x, where k is a constant. (b) given that y=sin^-1x, show that (1-x^2)d^2y/dx^2-xdy/dx=0

    asked by skangele on October 3, 2013
  8. Science

    The normal melting and boiling point of O2 are -218C and 49.8atm. a)Sketch the phase diagram for O2. b) Which is denser, O2(S) or O2 (l)? explain.

    asked by Joseph on August 21, 2010
  9. statistics

    A population of scores forms a normal distribution with a mean of µ = 40 and a standard deviation of SD = 12. a. What is the probability of randomly selecting a score less than X = 34?

    asked by Anonymous on June 3, 2011
  10. Math

    The functional determinant of x, e^x, and e^-x is equal to___ The orthogonal trajectory of y^2 - x^2 = C is__ The slope of the normal line to y^2 = x/2 at P(1/8,1/4) is ____ help please...

    asked by Alvin on December 14, 2009
  11. english

    The antonyms of ignore,optimistic,humility,indolent,boring,attack,normal,innocuous,preserve,commence

    asked by chi on January 24, 2013
  12. math

    Find two point on a circle x^2+y^2=1 where the slope of the tangent line is -2 write the equation for the normal lines at these points.

    asked by help on October 10, 2010
  13. Math

    Find the z-scores that bound the middle 55% of the standard normal distribution ____ small value _____ larger value

    asked by Teresa on May 11, 2013
  14. calculus

    Given f(x,y,z)= use stokes theorem to determine the flux integral curlF dot ds, where S is the graph of z=9 - x^2 - y^2 for z>=0 , oriented by the upward normal. please help!

    asked by sam on December 15, 2014
  15. Math

    A district mathematics test for third-graders had a normal distribution with a mean of 74 and a standard deviation of 11. What percentage of students scored between 63 and 85?

    asked by Clement on February 15, 2016
  16. math check

    Consider a normal population with ì = 49 and ó = 6. Calculate the z-score for an x of 44.2 from a sample of size 22. (Give your answer correct to two decimal places.) 3.75 is what I got.. and I have only one more try on this one.

    asked by Sue 74 on June 17, 2013
  17. Biology

    How does meiosis and fertilization in humans and other sexual reproductive organisms maintain the normal chromosomes number for each species?

    asked by Anonymous on April 9, 2016
  18. chemistry

    The normal boiling point of Rh is 3727°C. What is its vapor pressure in mm Hg at 2914°C, if its heat of vaporization is 557.0 kJ/mol?

    asked by hershi on February 5, 2014
  19. Math

    Find the z-scores that bound the middle 55% of the standard normal distribution ____ small value _____ larger value

    asked by Teresa on May 11, 2013
  20. statistics

    a standardized test has a mean of 88 and a standard deviation of 12. What is the score at thr 90th percentile? Assume a normal distribution.

    asked by cw on February 8, 2011
  21. Science - Pls Help! Thanks ' (:

    normal double glazing windows is made from two layers of glass with air trapped in between them. So How Can They Keep The House Warm ??

    asked by fern on January 11, 2009
  22. Statistics

    Find the number x such that the proportion of observations that are less than x in a Normal distribution with mean 100 and standard deviation 25 is 0.3. (Use 2 decimal places.)

    asked by Sarah Lacks on May 31, 2016
  23. trigonomentry using either exponential or complex

    give the expansion of sin^8@ as a series of cos@ plz help me i only know the normal way of doing that but i do not know how to apply complex number or exponential

    asked by sam on September 21, 2016
  24. science

    when light travels from air into glass at an angle of incidence greater than o degrees, how is it bent in relations to the normal?

    asked by siva on December 6, 2013
  25. math check

    Find the area under the standard normal curve between -1.32 and the mean, P(-1.32 < z < 0.00). (Give your answer correct to four decimal places.) 0.0968

    asked by Nora 62 on June 2, 2013
  26. stats

    Some IQ tests are standardized to a Normal model with a mean of 100 and a standard deviation of 16. About what percent of people should have IQ scores above 116?

    asked by Jamie on September 26, 2010
  27. biology

    How does meiosis and fertilization in humans and other sexual reproductive organisms maintain the normal chromosomes number for each species?

    asked by Hannah on April 11, 2016
  28. biology

    what genotypes would I use on a punnett sqare to shoe a man(color blind) and a woman (homozgous for normal vision

    asked by debbie on February 25, 2009
  29. college

    Consider a normal population with μ = 36 and σ = 4.9. Calculate the z-score for an x of 47.6 from a sample of size 14. (Give your answer correct to two decimal places.)

    asked by samantha on July 23, 2012
  30. 12th

    Assuming a normal distribution of Blood pressure of a mean of 120 with standard deviation of 10, what person would be considered to be unusual ?

    asked by michael perez on November 10, 2015
  31. medical terminology

    the period of time when the uterus returns to its normal size is the? A) luteal phase B)menarche C)puerperium D)ovulation

    asked by ceecee on October 17, 2010
  32. physics

    why is it that drivers place cement blocks and other heavy items in the trucks of their vehicles? (think of friction and normal force)

    asked by William on October 24, 2014
  33. maths

    find equations for the tangent and the normal at P (1n2, 2k) on the curve with equation y=ke^x, where k is a constant. (b) given that y=sin^-1x, show that (1-x^2)d^2y/dx^2-xdy/ dx=0

    asked by gibbsm on October 6, 2013
  34. public health

    Most of the increase in medical cost is due just to normal inflation that has affected the entire economy.” Comment on the above statement.

    asked by thafer on March 29, 2011
  35. Grammar

    There is normal DTRs noted on examination. The prosthetic hardware was freed from the surrounding tissues and removed. I think both sentences are ok as are.

    asked by Cathy on November 10, 2014
  36. BUSINESS 101

    If a firm has a current ratio of 2.00,it means that for every $2in ___it has $1in___ A.total assets;current liabilities B.current assets;current liabilities C.total assets;total liabilities D.current assets;total liabilities my answer is c can somebody

    asked by bella on October 15, 2013
  37. math

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

    asked by Miyabi123456789 on June 6, 2017
  38. Math

    Hey guys I need some help with this question PLZ: A telecommunications company offers a rental deal which costs $30 per month plus 50c per call. a) Find the total cost (T1) for making x calls in a given month b)Find the total cost for making 52 calls in a

    asked by Liam on November 4, 2015
  39. Science

    1 kg of Nitrogen is mixed with 3.5 m3 of hydrogen at 300 K and 101.3 kPa and sent to ammonia converter. The product leaving the converted analyzed 13.7% ammonia, 70.32% hydrogen and 15.98% nitrogen. (a) Identify the limiting reactant? (b) What is the

    asked by Man Singh Chouhan on March 26, 2015
  40. physics

    If a car is travelling at 60. miles per hour and the brakes are applied so that it accelerates at -15.0 ft/s2, how many feet will it take to stop? i realize i am posting a lot of questions, but i don't understand them!

    asked by Anonymous on January 21, 2011
  41. physics

    Suppose that in the same Atwood setup another string is attached to the bottom of m1 and a constant force f is applied, retarding the upward motion of m1. If m1 = 5.30 kg and m2 = 10.60 kg, what value of f will reduce the acceleration of the system by 50%?

    asked by TPAIN on October 25, 2009
  42. science

    A 1600kg car starts at rest and reaches 40 m/s in 6 seconds. I need to find: a) the change in kinetic energy b) work c) distance d) applied force of the engine

    asked by Abby on May 15, 2017
  43. Physics

    Suppose that in the same Atwood setup another string is attached to the bottom of m1 and a constant force f is applied, retarding the upward motion of m1. If m1 = 5.30 kg and m2 = 10.60 kg, what value of f will reduce the acceleration of the system by 50%?

    asked by Rachel on October 25, 2009
  44. Physics

    The flywheel is initially at rest. A force of 250 N is applied tangentially to the rim, causing it to rotate about its central axis. what is the energy acquired by it after 1 minute? can anyone help me with this?

    asked by Oisin on August 11, 2010
  45. PHYSICS HELP

    A disk has a moment of inertia of 3.0x10^-4 and rotates with an angular speed of 3.5 rad/sec. WHat net torque must be applied to bring it to rest in 3.0s? can some one help me out with this im lost!!!

    asked by PHYSICS HELP on November 14, 2007
  46. physics

    When brakes applied to a moving car travelling at 60km/hr it decelerates at a uniform rate of 5ms-2. Calculate the time taken to reach a velocity of 36km/hr

    asked by bola on February 23, 2010
  47. Written communication

    Often applied to politicians, the term _______ suggests hiding one's feelings while obscuring or "spinning" facts. A. vacillate B. simulate C. dissimulate D. dissemble plz help me

    asked by Tank on August 26, 2014
  48. English

    Sigmund Freud coined the term _______,which he applied to people who were extremely self-absorbed. A. Dryad B. suspension of disbelief C. moral D. narcissistic Answer: B?

    asked by Ciara on March 4, 2013
  49. Physics

    What net braking force must be applied to stop a car with a mass of 900 kg initially travelling at a velocity of 100 km/h within a straight-line distance of 50 m?

    asked by Syafiqa on July 17, 2010
  50. Chemistry

    A clear colorless liquid in an open beaker was heated to boiling. The liquid began to boil at 110°C, and as vapors escaped, the temperature of boiling gradually increased to 115°C, at which the heating was stopped. On the basis of this information, we

    asked by Chris on May 12, 2010
  51. chemistry

    A clear colorless liquid in an open beaker was heated to boiling. The liquid began to boil at 110°C, and as vapors escaped, the temperature of boiling gradually increased to 115°C, at which the heating was stopped. On the basis of this information, we

    asked by jasmine on May 18, 2010
  52. Physics/Math

    A stuntman drives a car (without negative lift) over the top of a hill, the cross section of which can be approximated by a circle of radius R = 110 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the

    asked by COFFEE on February 13, 2007
  53. Physics

    How come a heavy truck and a small car can both travel safely at the same speed around an icy, banked-curve road? I would think that since mass is increased, normal force is therefore increased, and force of friction is therefore increased. And since the

    asked by Hannah on October 20, 2010
  54. Biostats

    I am having problems in this course with following the professor. Can anyone help me with this problem Thanks need to calculate 99% CI for true mean with the following data: n=100, mean is 126 with sample variance of 402. I have to know the answer,

    asked by Grace on June 8, 2007
  55. Accounting

    March 3 Inventory units 60 per unit $1,500 total $90,000 March 8 Purchase 120 units $1,800 per unit total $216,000 March 11 Sal units 80 per units $5,000 total $400,000

    asked by Pat on August 28, 2011
  56. engineering

    in a proposed telesurgery application the image will be transmitted at 2*10^8m/s ovwe a roundtrip distance of 740km, the compression and decompression process for the images will take a total of 60m/s. what is the largest permissible value for the sources

    asked by Kenji86 on April 15, 2010
  57. chemistry

    Given the following chemical reaction: Zn+HCl-->ZnCl2+H2(g) If you measured the total volume of collected gas over water at 20 degrees celcius t be 428ml at a total pressure of 845 torr, how many milliliters of 2.6M HCl would be required to produce the

    asked by regina on December 5, 2010
  58. Physics

    If 400 gm of aluminum are put into 200 gm of water at 20 C in 110 gr. calorimeter of specific heat .093, and the temp.or stable equilibrium is 28.8 C, what is the initial temperature of the aluminum? specific heat of aluminum is .22..

    asked by Lambo on December 6, 2012
  59. physics

    a helicopter is ascending vertically with a speed of 5.20 m/s. at a height of 110 m above the Earth, a package is dropped from a window. how much time does it take for the package to reach the ground ? (hint: v0 for the package equals the speed of the

    asked by mary on April 15, 2012
  60. science

    how do you do this question An aqueous solution of calcium chloride contains 2 grams of calcium chloride ( molar mass 110.98 g mol-1) in 100 ml calculate the concentration of chloride ion (Cl-) in the solution

    asked by Slaysliver on January 22, 2009
  61. math

    The ratio of the tens digit to the units digit is 1:4. If the digits are reversed, the sum of the new number and the original number is 110. Find the original number by using a systems of equations with elimination

    asked by misa on September 11, 2008
  62. pprecalc

    a windshield wiper on a a plymouth acclaim is 20 in. long and has a blade of 16in long. if the wiper sweeps through an angle of 110 degree, how large an area does the wiper blade clean?

    asked by greeny on October 3, 2012
  63. Medical Information Management and office practice

    At Allendale Psychiatric Hospital, the hospital census on January 4 is 110. According to the following data, what's the hospital census for January 5? Admissions 10 Discharges 2 A & D A. 99 B. 100 C. 108 D. 118 What is the correct answer?

    asked by jules on January 9, 2011
  64. Chemistry

    Suppose that you had a mercury-in-glass thermometer and calibrated to measure temperatures from -10 degrees C to 110 degrees C and you wished to measure a temperature of approximately 115 degrees C accurately. How might you use your thermometer to do it?

    asked by James on April 3, 2011
  65. Algebra

    Ms. Jones has two job offers as a car salesperson. At one dealership, she will receive $600 per month plus a commission of 2% of the total price of the automobiles she sells. At the other dealership, she will receive $1000 per month plus a commission of

    asked by Tucker on January 31, 2013
  66. Chemistry

    I need to find out what the total acid concentration is in Kool-Aid. If 23.3 mL of 0.1043M NaOH neutralize a 60 mL solution of Kool-Aid (10 mL) and water (50 mL), what is the total concentration in a 10.00 mL aliquot of Kool-Aid? If you prepared a standard

    asked by Julie on February 15, 2011
  67. Early Child Ed.

    Can you please check my questions and answers? 1. A three-year-old child who is developmentally delayed might: A. need training wheels on his two-wheel bike. B. speak in two-word sentences C. not be able to read. D. need someone to help cut his meat at

    asked by Tamera on July 12, 2007
  68. physics

    What is the magnitude of your total displacement if you have traveled due west with a speed of 23 m/s for 125 s , then due south at 12 m/s for 255 s ? 2sf What is the direction of your total displacement in part A.

    asked by sintia on February 20, 2017
  69. Algebra/Word problem

    media services charges $20 for a phone and $30/month for its economy plan. what is the total cost for 10 months service C(t)= 30t +20= total cost is $500 for 10 months?

    asked by Amy on September 8, 2010
  70. statistics

    The pie chart below shows how the total annual income for a certain family is spent. If the total annual income is , what amount is budgeted for Savings and Insurance combined?

    asked by donna on January 4, 2016
  71. math

    Tim sells sneakers. He receives $9.75 an hour and 3% commission on sales. One week he works 24 hours and his sales total $1,879.95. What are his total earnings for the week ? Please help

    asked by sam on March 23, 2015
  72. algebra

    a) Find a polynomial R(p) that represents the total revenue when the shirts are p dollars each. b) Find R(5), R(10), and R(20). c) Use the bar graph to determine the price that will give the maximum total revenue.

    asked by Anonymous on November 12, 2010
  73. math

    In December the average total rainfall in all of the deserts together is 0.89mm.Explain how to use the figures from the table to write a comparison of the total desert rainfall in August and December.

    asked by tiffany on March 31, 2011
  74. Accounting

    Cupid Co. has total assets of $600,000 and its liabilities are equal to two-thirds of its total assets. What is the amount of Cupid Co.'s Owner's Equity? Please explain how you got this answer.

    asked by Anon on February 8, 2017
  75. financial math

    Mary is buying several items that cost $128.25 total. She is using a store coupon for 35% off her purchases. She has to pay 4% sales tax. Calculate the total cost of the items.

    asked by Anonymous on January 24, 2013
  76. Biology

    Heterozygous tall and red flowered pea plants were selfed and total 2000 seeds are collected. What is the total number of seeds for both heterozygous traits?

    asked by Mini on March 5, 2018
  77. Math

    A cashier has a total of 37 bills consisting of ones, fives and twenties. The number of twenties is 15 less than the number of ones. The total value of money is $191. How many of each denomination of bill are there? There are ___ ones, ___fives,

    asked by Dustin on September 6, 2016
  78. Business math

    what the rebate of the finance charge and payoff would be if the pickup truck loan were paid off after 27 months instead of 60. Total of monthly payments 60 x 194.38. I don't know how to get the total finance charge

    asked by Rebecca on November 14, 2010
  79. Physics

    A car goes North at 55mi/hr for 1.3 hrs. It then goes East at 65mi/hr for 45 min. What is the total distance travelled, total displacement,average speed and average velocity of the car?

    asked by Erica on September 9, 2016
  80. Algebra

    Write a system of equations to model the problem and solve the system: Benjamin has nickels and dimes and his toy bank he has a total of 45 coins the total value of $3.60. How many coins of each kind does he have?

    asked by Brianna on November 27, 2014
  81. Algebra

    Write a system of equations to model the problem and solve the system: Benjamin has nickels and dimes and his toy bank he has a total of 45 coins the total value of $3.60. How many coins of each kind does he have?

    asked by Brianna on November 27, 2014
  82. Albegra

    Tickets to a school play were sold for $3.50 for each adult and $2.00 for each child. A total of 325 people attended the play and the total amount that was taken in was $875. How many of each kind of ticket was sold.

    asked by Lurye on October 23, 2015
  83. Physics

    Three charges q1= 2uc(0,0)cm q2=4uc(0,10)cm and q3=_3uc(15,0)cm acts on one another, find the magnitude of the total electric force and the angle that the total electric force makes with positive x_axis.

    asked by Gboss on July 22, 2018
  84. MATH

    PLEASE HELP ME PLEASE I REALLY NEED HELP!!!!!!!! :-( Complete the table below.Draw the next few squares as needed.Write all ratios in simplest form. Shaded Blocks: 1 | 4 | 9 | 16 | 25 | | ----------------------------------------------------- Total Blocks:

    asked by Jen on November 28, 2013
  85. Math

    Each week Rosa receives a salary of $200 plus a 6 percent commission on her total sales. To the nearest dollar, how much would Rosa have to sell in one week to earn a total of $300

    asked by Stephanie on October 21, 2017
  86. geometry

    An open rectangular glass tank with a horizontal base PQRS measures 80 cm by 50 cm by 34 cm. 110 liters of water is poured into the tank. v The tank is tilted towards edge PQ until the water just reaches the edge TU. w Calculate the value of d. s

    asked by pamela on June 19, 2012
  87. physics

    A light spring having a force constant of 110  is used to pull a 15.0  sled on a horizontal frictionless ice rink. The sled has an acceleration of 1.60 ? [2/27/12 9:41:56 PM] Matt Yeager: By how much does the spring stretch if it pulls on the sled at

    asked by Charlie on February 28, 2012
  88. Math Trivia! :)

    Three friends arrive at an In late one night and rent a room for $30 (each of them contribute $10). THe next mornnig, the Innkeeper decides to give them a $5 discount because of a leak in the roof. Since he can't split the $5 evenly, he gives each of the

    asked by Dawn on February 14, 2011
  89. Summer School Calculus

    Add the following vectors , 7m/s [N30E] and 2m/s [S17E], using trigonometry. Once you draw these out into diagrams, you use the triangle law yes? How do you find the angles to use in the cosine and sine law? A little confused, thanks for the help.

    asked by Derek on June 29, 2008
  90. physics

    Two sound sources radiating in phase at a fre- quency of 540 Hz interfere such that maxima are heard at angles of 0◦ and 21◦ from a line perpendicular to that joining the two sources.

    asked by Anonymous on March 8, 2011
  91. Pre-Algebra

    Can someone help me with this one- Quadrilaterals are a special type of polygon because _______________. A. they always have exactly four sides B. the sum of their interior angles always measures 180° C. they always have opposite sides that are parallel

    asked by mysterychicken on May 26, 2009
  92. Math

    The directions that came with the kite pattern that Andre ordered on the internet said to cut out 2 supplementary angles so that the measure of one is twice the measure of the other. How many degrees are in each angle? Justify your answer.

    asked by Jenny on February 18, 2014
  93. trig

    Find all angles θ between 0° and 180° satisfying the given equation. (Enter your answers as a comma-separated list. Round your answers to one decimal place.) cos θ = 1/7

    asked by stellar on September 30, 2011
  94. math

    calculate the measures of the point angles of the star-shaped polygons shown. I know you can see the firgure but its 140 degree angle. To measure them do I do 360/140=2.57?

    asked by Alvin on April 7, 2010
  95. geometry

    If four angles of a convex pentagon measure 120°, 93°, 108°, and 101°, find the measure of the fifth angle. Show equations and work that lead to your answer.

    asked by sharon on January 8, 2012
  96. Trig

    Find all angles θ between 0° and 180° satisfying the given equation. (Enter your answers as a comma-separated list. Round your answers to one decimal place.) Sin θ = 1/4

    asked by Amanda on November 9, 2015
  97. trig

    TA and TB are two cables helping to brace a 500 ft radio tower, FT. If the angles which the cables make with the horizontal are 62 and 50 (degrees), find the distance between their anchor points

    asked by Michael on May 10, 2010
  98. physics

    a fire hose hold near the ground shoots water at speed of 6.8 m/s at what angle(s) should the nozzle point in order that the water land 2 dm away why are there two diffent angles?

    asked by kit flores on September 6, 2014
  99. physics

    A girl uses a spanner of length 20cm to tighten a nut. If she pulls at right angles to the end of the spanner with a force of 50N,calculate the moment of her pull

    asked by atiyya on November 19, 2016
  100. Physics

    A loudspeaker of mass 20.0kg is suspended a distance of h = 1.60m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 4.00m .

    asked by Anonymous on September 30, 2013