1. statistics

    the times required to assemble a product part are normally distributed with a mean of 54.4 minutes & a standard deviation of 5.2 minutes. What fraction of the assemble workers require more than one hour?

    asked by lia on November 15, 2011
  2. physics

    calculate the amount of work it takes to increase a cars speed from 10mph to 30 mph and from 50mph to 60mph. Is more work required for 10mph to 30mph?

    asked by sam on August 6, 2014
  3. finance

    dividend pays $2 risk free rate 4% expected return 14% price of shares 1 year from now $22 beta is 1.25 what is the market required rate of return?

    asked by Tiffany on May 31, 2008
  4. Chemistry

    If 920 mL of 0.0402 M aqueous LiOH reacts stoichiometrically according to the balanced equation, what mass (g) of gaseous CO2 is required? 2 LiOH(aq) + CO2(g) → Li2CO3(aq)

    asked by DJ on September 29, 2010
  5. calculus

    A conical tank has a diameter of 9ft and is 12 ft deep. If the tank is filled with water of density 62.4 ft/cubic ft, how much work is required to pump the water over the top?

    asked by Anonymous on February 15, 2012
  6. physics

    the tires of a certain car begin to lose their grip on the pavement at acceleration of 5 m/s to the power of 2 if the car has this acceleration , how many seconds does it required reaching a speed of 25 m/s starting from 10 m/s?. Please help me

    asked by shiela vargas on March 20, 2016
  7. math

    a cylindrical vessel without lid is made from a sheet of metal find the area of metal required if the length of the vessel is 35cm and its diameter is 28cm.

    asked by akash tiwari on March 13, 2016
  8. difficult chemistry

    Calculate the molarity of thiosulfate solution if 0.400mg of Kl03 required 100ml of the thiosulfate solution provided that excess kl and hcl were added. Who helps me

    asked by Fai on January 13, 2013
  9. math

    A computer password is required to be 5 characters long. How many passwords are possible if the password requires 1 letter(s) and 4 digits (numbers 0-9), where no repetition of any letter or digit is allowed?

    asked by hana on November 3, 2015
  10. Physics 11

    Show that the minimum force required to pull a wheel if Radius R and mass M over a step of height h, given R> h when the force is applied at the top of the wheel is F = Mg sqrt(h/2R-h) Thank you so much

    asked by Raylene on November 7, 2013
  11. chemistry

    how would you calculate the number of milliliters of 1 M HCl required for .212 mol of HCl?? and how could i find out what remains in the beaker when distilled water is evaporated in a beaker?

    asked by Kayla on May 6, 2008
  12. Is this right?? Stats....

    How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.20 0.16 0.28 0.24 Would it be 0.12??

    asked by Jennifer on October 25, 2011
  13. maths

    A cylindrical vessel without a lid is made from a sheet of metal . Find the area of the metal required if the length of the vessel is 35cm and its diameter is 28cm ????

    asked by tuhituhi on November 21, 2012
  14. stats

    How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.18 0.20 0.32 0.28

    asked by Anonymous on October 7, 2012
  15. Chemistry

    8.5g of sample of iron required just 75cm3 of 3.00M HCl to dissolve it and give a neutral solution.Calculate the percentage purity of the sample of iron.

    asked by Kazembeous on November 16, 2014
  16. physics

    What is the length of copper wire is required to produce a 4mohm resistor? Assume the diameter of the wire is 1mm and that the resistivity roh copper is .0000000178ohmm

    asked by beyene dendea on September 4, 2017
  17. Math

    A rectangular tub with dimensions 2m x 1m x 0.5m is filled with water using a pail of radius 0.1 m and height 0.35 m. How many pails of water will be required? Give your answer to the nearest whole pail.

    asked by Anonymous on March 17, 2011
  18. chemistry

    A heater caused the temperature of a 550 g Aluminum block to change from 22 degrees C to 145 degrees C. How many calories were required to heat the metal block?

    asked by cam on April 11, 2011
  19. physics

    A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 106°C? (b) What temperature change is required to increase its volume by 0.8%?

    asked by Kim on December 1, 2009
  20. Logs

    The number of years n required for an investment at interest rate r to double in value must satisfy (1+r)^n = 2. Using the approximation ln(1+r)=r valid for small r, find the number years n as a function of r.

    asked by Linda on April 21, 2008
  21. trigo

    A plane in calm weather flies east at 20 K.P.H. A 45 K.P.H wind blows from the north. Find the direction and speed required to keep the plane in it's original course and speed.

    asked by carl on November 22, 2015
  22. Financial Investments

    The number of years n required for an investment at interest rate r to double in value must satisfy (1+r)^n = 2. Using the approximation ln(1+r)=r valid for small r, find the number years n as a function of r.

    asked by John on September 20, 2012
  23. organic chemistry

    How many milliliters of boiling water are required to dissolve 25 g of phthalic acid? If the solution were cooled to 14 degree Cellucius, how many grams of phthalic acid would recrystallize out?

    asked by felici on September 3, 2012
  24. physics

    A force of 30.0 N is required to start a 3.8 kg box moving across a horizontal concrete floor If the 30.0 N force continues, the box accelerates at 0.50 m/s2. What is the coefficient of kinetic friction?

    asked by miya on November 10, 2009
  25. Maths

    A farmer wishes to fence his field with 3 rows of wire.if the dimensions of the field are 120m by 68m,find the total length of wire required

    asked by Anandh on February 19, 2017
  26. physics

    A force of 36.1 N is required to start a 4.0 -kg box moving across a horizontal concrete floor. If the 36.1 N force continues, the box accelerates at 0.71 m/s^2. What is the coefficient of kinetic friction?

    asked by Kim on October 1, 2010
  27. physics

    If the torque required to loosen a nut on the wheel of a car has a magnitude of 40.1 N*m, what minimum force must be exerted by a mechanic at the end of a 38.2 cm wrench to loosen the nut?

    asked by Aslin on October 4, 2010
  28. Chemistry

    Water is exposed to infrared radiation of wavelength 3.0×10^−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 1.7 g of water by 2.2 K?

    asked by Kyle on November 9, 2009
  29. dav science

    a machine gun fires 25 g bullets at the rate of 600 bullets per minute with a speed of 200 m/s. calculate the force required to keep the gun in position.

    asked by shri on August 18, 2014
  30. Physics

    A 25.0kg pickle is accelerated from rest through a distance of 6.0m in 4.0s across a level floor. If the friction force between the pickle and the floor is 3.8N, how much work is required to move the object?

    asked by Sandara on January 1, 2014
  31. physics

    the speed of a wave in a 4 m rope is 3.2 m/s. what is the frequency of the vibration required to produce a standing wave pattern with 1 antinode? 2 antinodes? 4 antinodes? please help!!! i don't understand how to do this

    asked by Isabelle on January 5, 2015
  32. Stats

    How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.20 0.16 0.28 0.24 Would it be 0.11??

    asked by Jennifer on October 24, 2011
  33. Ethics

    As a matter of fairness, should individuals be required to pay for health services on the basis of their actuarial risk of illness or, alternatively, on the basis of their ability to pay? help?

    asked by Anonymous on April 5, 2017
  34. chem

    if a 240mg of an acid H2A required 50.0ml of 0.10M NaOH for complete neutralization, what is yhe equivalent weight of the acid? what is its molecular weight?

    asked by rose on January 29, 2013
  35. physics

    The speed of a transverse wave on a string is 470 m/s, and the wavelength is 0.1 m. The amplitude of the wave is 1.6 mm. How much time is required for a particle of the string to move through a total distance of 1.0 km?

    asked by carter montgomery on January 28, 2013
  36. physic

    Hi! help me please, Thank you. A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 94°C? cm (b) What temperature change is required to increase its volume by 0.9%? I only need help

    asked by Chan on December 1, 2009
  37. physics

    The specific heat capacity of copper is 0.092 calories per gram per degree Celsius. How much heat is required to raise the temperature of a 5 g piece of copper from 0°C to 80°C?

    asked by FALLON on December 14, 2009
  38. science

    It takes 3.38 J of work to stretch a Hooke’s-law spring 5.63 cm from its unstressed length. How much the extra work is required to stretch it an additional 4.22 cm? Answer in units of J

    asked by jason on November 17, 2012
  39. physics

    2. A car accelerates uniformly from +10.0 m/s to +40.0 m/s over a distance of 125 m. How long did it take to go that distance? Show all your work, including the equation used, given and unknown quantities, and any algebra required. Make sure your answer

    asked by Anonymous on January 15, 2013
  40. Chemistry

    Describe the procedure you would follow to determine the concentration of Vitamin C in a sample if the volume of DCPIP required to reach the endpoint was more than the 25-mL flask could hold. Note the titration must still be carried out in the flask. Be

    asked by Audrey on May 1, 2016
  41. math

    a leach-free area for dogs is to be created in a field behind a recreation centre. what length of fencing will be required, if the plans show an irregular pentagonal area with vertices at (2,0), (1,6), (8,9), (10,7), and (6,0)?( one unit represents 10m).

    asked by Ted on October 17, 2010
  42. science

    how many of its photons are required to ionize atomic hydrogen? Einstein quote for Lenard’s measurement of the “largest effective wavelength for air”=190 nm,, For this problem, take the energy of the ground state of the hydrogen atom to be

    asked by nnn on April 28, 2015
  43. physics

    A 33 tonnes jet airline has 4 engines,each producing a nearly constant thrust of 165kN during the takeoff roll.Determine the length of the runway required if the takeoff speed is 320km/h.Neglect air and rolling resistance.

    asked by olivia (pls help!!) on August 9, 2015
  44. Chemistry

    Describe the procedure you would follow to determine the concentration of Vitamin C in a sample if the volume of DCPIP required to reach the endpoint was more than the 25-mL flask could hold. Note the titration must still be carried out in the flask. Be

    asked by Audrey on May 1, 2016
  45. physics

    A. State Ohm’s law B.Describe the process of electrolysis C. What is the relationship between resistance and resistivity D. What is the current through 8Ω device operating with 120V The potential difference required to pass 3A through 42Ω. E.

    asked by Chansa on May 17, 2016
  46. Physics

    -The brakes on your automobile are capable of creating acceleration of 19 ft/s2. If you are going 76 mi/hr and suddenly see a state trooper, what is the minimum time required to get your car to 55 mi/hr? For this answer, I got 1.62 s. -How far do you

    asked by Lindsay on October 4, 2007
  47. Physics- spring constant

    Astronauts are in space so there is no gravity, but they wish to weight themselves. The spring constant is 265 N/m. The question shows a graph; the y is the position in meters while the x is the seconds. I do not wish for an answer, but the way in which

    asked by Chris on November 12, 2014
  48. chem

    A student uses (2.1000x10^-1) grams of oxalic acid dihydrate. Her titration required (2.63x10^1) mL of NaOH to reach the endpoint. What is the M of her NaOH solution. Put in scientific notation w/ 3 sig figs. How would you do this through dimensional

    asked by Chris on June 7, 2018
  49. math

    What monthly payment is required to amortize a loan of $35,000 over 10 yr if interest at the rate of 15%/year is charged on the unpaid balance and interest calculations are made at the end of each month? (Round your answer to the nearest cent.)

    asked by Anonymous on March 14, 2012
  50. calculus

    A tank consists of a right circular cylinder at height (h)surmounted by a hemisphere at a radius (r) with an outlet atthe top. The tank is full of water at density ρkg/m3. Find the work required to empty thetank.

    asked by Peter on March 10, 2012
  51. Phsyics HELP!

    A car accelerates uniformly from +10.0 m/s to +50.0 m/s over a distance of 225 m. How long did it take to go that distance? Show all your work, including the equation used, given and unknown quantities, and any algebra required. Make sure your answer has

    asked by Vivian on March 5, 2015
  52. algebra

    For a motor vehicle travelling at r miles per hour, the distance d in feet required to stop at approximately d=0.05r^2+r. If a school bus is traveling at 45mph how many feet to, the nearest foot,would it travel before coming to a halt.

    asked by Kim on December 8, 2013
  53. physical

    A bicycle and its rider together has a mass of 95 kg. What power output of the rider is required to maintain a constant speed of 4.8 m/s (about 10.7 mph) up a 5.0% grade (a road that rises 5.0 m for every 100 m along the pavement)? Assume that frictional

    asked by laila on October 13, 2013
  54. Physics (HELP)

    Jill pulls on a rope to lift a 12 kg pail out of a well, while the clumsy jack watches. For a 10.0 meter segment of the lift, she lifts the bucket straight up at constant speed. How much power is required to complete this task in 5 seconds?

    asked by Lance on March 23, 2018
  55. phy

    A bicycle and its rider together has a mass of 62 kg. What power output of the rider is required to maintain a constant speed of 4.6 m/s (about 10.3 mph) up a 5.0% grade (a road that rises 5.0 m for every 100 m along the pavement)? Assume that frictional

    asked by kyoya on February 26, 2013
  56. Grammar

    Proofread sentence and insert punctuation as required. This is an irate boisterous 46-year old lady who complains that she was hit in the face with the heel of a womans' shoe. Answer: comma after irate woman's ? not sure - I don't even think it needs any

    asked by Leslie on May 11, 2011
  57. physics

    consider system shown in fig. 1. the coeffecient of kinetic friction between block a (m=10 kg) and the table is 0.20. calculate the weight of the hanging block required if this block is to descend at constant speed once it has been set into motion.

    asked by flay on January 2, 2013
  58. Physics

    A car accelerates uniformly from rest to 21.0 m/s in 6.1 s along a level stretch of road. Ignoring friction, determine the average power required to accelerate the car if the weight of the car is the following. A) 8.0e3N B) 1.2e4N

    asked by Natasha on March 13, 2012
  59. physics

    the amount of heat energy required to convert 5g of ice at 0 degree centigrade into water at 40 degree centigrade is

    asked by ddf on December 10, 2015
  60. physics

    A 4.6 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.45 m above the counter?

    asked by kim on September 17, 2016
  61. Chemistry

    Calculate the amount of heat required to take 3.00kg of ice at -10 degrees Celsius to 115 degrees celsius.

    asked by Ahmad on April 25, 2012
  62. physics

    If an impulse of 60 Ns is required to stop and object, list in your log three force and time combinations that can stop an object.

    asked by kevin on January 31, 2011
  63. Discrete Mathematics

    Use Bubble Sort to sort the list: 7, 12, 5, 22, 13, 32 What is the maximum number of comparisons required for a list of 6 numbers? How many vcomparisons did I actually need?

    asked by Joy on July 26, 2013
  64. Math

    Determine the minimum number of students with scores of 90 required to have the class average over 75. Score 60,70,80,90. Number of students 7, 3, 8, ?

    asked by James B. on March 7, 2014
  65. Chemistry

    How much heat is required to raise the temperature of a 125g block of iron from 17.5 degrees celcius to 82.3 degrees celcius?

    asked by Maryam on November 27, 2012
  66. physics- work

    what is the work required to raise a 10-kg bucket from a well 100-meter deep? Is this right? 10*9.8= 98N 98N*100= 9800J

    asked by Anonymous on September 11, 2015
  67. Chemistry!!

    How much heat is required to raise the temperature of 250.0 g of mercury 52ºC? The specific heat of mercury is 0.14 J/(gºC).

    asked by Meg Hat on May 21, 2010
  68. science

    How many grams of sodium hydroxide is required to neutralize 73 grams of hydrochloric acid and to from sodium chloride and water

    asked by bala on December 11, 2016
  69. Chemistry

    The molar heat of solution of NH4NO3 is 25.7 kJ/mol. How much heat (in kJ) would be required to dissolve 20 grams of NH4NO3 in water?

    asked by Hannah on December 15, 2010
  70. physics

    A 4.6 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.45 m above the counter

    asked by kim on September 18, 2016
  71. chemistry

    what mass (in grams) of solid potassium permanaganate is required to prepare 250mL of a 0.02 M of potassium permanaganate solution?

    asked by Hannah on September 23, 2009
  72. Chemistry 109

    How many joules of heat are required to raise the temperature of 225 g of water from 42 degree celcius to 75 degree celcius?

    asked by Chrystal Kilgore on July 22, 2013
  73. chemistry

    what mass (in grams) of solid potassium permanaganate is required to prepare 250mL of a 0.02 M of potassium permanaganate solution?

    asked by Hannah on September 23, 2009
  74. chemistry

    What is the minimum silver ion concentration required to initiate the precipitate of silver bromate from 0.01 M potassium bromate

    asked by lakshmi on September 9, 2014
  75. Chemistry

    Acetic acid has a pK of 4.8. How many mL of 0.1M acetic acid and 0.1M of sodium acetate are required to prepare 1 liter of 0.1M buffer solution having a pH of 5.8?

    asked by Barb on September 14, 2011
  76. chemistry

    if the heat of combustion of glucose is -2808 kJ/mol, how many grams of glucose are required to supply 1650 kJ of heat?

    asked by Anonymous on November 12, 2012
  77. Chemistry105

    A 10.00 mL volume of sulfuric acid required 23.65 mL of NaOH solution for complete neutralization. What is the molarity of the acid solution?

    asked by Mira on December 18, 2012
  78. science

    A 5.8 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.57 m above the counter?

    asked by vanessa on February 4, 2012
  79. physics

    the second floor of a house is 6m above street level. How much work is required to lift a 300-kg refrigerator to the second-floor level?

    asked by Anonymous on December 17, 2014
  80. chemistry please help

    how do you know if a hydrolytic work up is required for reactions with grignard reagents? What does hydrolytic work up mean is it treatment with aqueous acid

    asked by molly on November 2, 2009
  81. clinical chem

    How many grams of hydrated MgSO4 ⋅ 5 H20 (M.W.: MgSO4 = 119, H20 = 18) are required to make a 10% solution of MgS04

    asked by Bridget on January 22, 2018
  82. Chemistry

    A swimming pool, 10.0 m by 4.0 m, is filled with water to a depth of 3.0 m at a temperature of 20.2°C. How much energy is required to raise the temperature of the water to 24.0°C?

    asked by Stacey on October 27, 2015
  83. Chemistry

    Calculate the mass of Fe(NH4)2(SO4)2.6H2O(s) required to prepare 25ml of 1.0 M Fe(NH4)2(SO4)2.6H20(aq)

    asked by Anonymous on May 26, 2017
  84. science

    acetic acid has a pka of 4.8 how many ml of 0.1M acetic acid and 0.1M sodium acetate are required to prepare 1L of 0.1M buffer with a PH of 5.8? solve

    asked by ruth on March 16, 2016
  85. maths

    630 chocolate were packed equally in 21 boxes.Of 18 chocolates had to be packed in each box find the no.of boxes required.

    asked by subiha on February 7, 2016
  86. chem

    Please help me with these two problems: 1)How many electrons would it take to equal the mass of a proton? 2)What mass of electrons would be required to just neutralize the charge of 1.0g of protons?

    asked by sue on March 5, 2009
  87. Maths

    A square tile is having a side of length 15 cm how many tiles would be required to cover the square floor of bathroom of side 5m

    asked by Ravneet on December 28, 2016
  88. Chemistry

    How much heat is required to raise 75 grams of 0 degree Celsius ice to 135 degree Celsius steam?

    asked by Lizabeth on March 31, 2011
  89. Chemistry

    For the reaction C + 2H2 -> CH4 How many grams of hydrogen are required to produce 145 grams of methane, CH4

    asked by Seth on June 1, 2017
  90. chemistry

    How much heat is required to warm 250.4 g of water from 22.6 C to 75.8 C given that the specific heat capacity of water is 4.184 J/gx degrees C?

    asked by Teresa on November 3, 2011
  91. chem

    how many calories of heat energy are required to warm 250ml of water from 35 degrees celsius to 64 degrees celsius?

    asked by Denise on April 1, 2013
  92. physics

    a 70 kg block rests on the earth's surface. How much energy is required to move the block very far from the earth, ending up at rest again?

    asked by paul on March 22, 2015
  93. physics

    A 4.5 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.55 m above the counter?

    asked by kaira on September 18, 2011
  94. science

    how much energy is required to raise 5 kg of silver 36 degrees celcius with a specific heat of 234 j/kg degrees celcius

    asked by justin on December 1, 2010
  95. science

    Phase changes of water 1. is enrgy required for each phase change 2. Can both liguid water and steam exist at 100c

    asked by bella on October 22, 2007
  96. personal finance

    would you purchase a $100,000 20 year annuity today for $15,000 given a required rate of return of 14.5%? Why, what is the value of the annuity?

    asked by Isabel on March 17, 2010
  97. Maths,physics,biology,english,arabic,chemistry

    Calculate the mass of NaOH required to make 500ml of 0.5 M aqueous solution (Molecular mass of NaOH=40)

    asked by Fathima on July 29, 2017
  98. science

    A car traveling along the highway needs a certain amount of force exerted on it to stop. More stopping force may be required when the car has:

    asked by john on February 21, 2013
  99. chemisty

    A 5.10-g sample of iron is heated from 36.0 C to 75.0 C. The amount of energy required is 89.5 J. the specific heat capacity of the sample of iron is?

    asked by emily on March 5, 2011
  100. science

    A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?

    asked by ashley on September 3, 2010