1. Maths

    Let S be a set of 31 equally spaced points on a circle centered at O, and consider a uniformly random pair of distinct points A and B (A,B∈S). The probability that the perpendicular bisectors of OA and OB intersect strictly inside the circle can be

    asked by ABCD on May 29, 2013
  2. Chem-Help Please!!!

    a correction needs to be made to the calculations for real gases as compared to ideal gases. apply these corrections and calculate the real pressure expected for 5 mole of nitrogen in a 1.5L container at a temp. of 20C. Note: I tried to find right formula

    asked by Amanda on April 18, 2012
  3. Engineering science

    I A boat start sailing on Monday 10:00 at harbour A and sails 600km due north. Later it turns east for a further 420km to reach harbour B on Tuesday at 12:00.a)find total displacement from A-B average. b)speed of the trip.c)average velocity.

    asked by Lang on October 14, 2019
  4. math

    The square base of the Great Pyramid of Khufu has a length of approximately 1.476 * 10^3 feet. Its height is about 2.17*10^2 feet. Find the approximate volume of the pyramid. Write your answer in scientific notation. Round the coefficient to the nearest

    asked by scientific notation plz help on October 27, 2016
  5. Math

    Erica has scores:131, 120, and 140, each out of 150 points, on her algebra tests. Use an inequality to find the score she must make on the final exam to pass the course with an average of 80 percent or higher, given that the final is worth 200 points.

    asked by Julian on September 11, 2013
  6. Physics

    A conical pendulum rotates at 100 rev/min. The cord is 150mm long and the mass of the bob is 1.35kg. Find (a)the amount by which the bob rises above its lowest position , (b)the periodic time , (c)the tension in the cord . ( PLEASE HELP ME FOR MY REPORT )

    asked by Lairjan on February 26, 2016
  7. Biology

    I was wondering if someone could please explain this to me (please don't give me links to websites, I already have a thousand saved under my favourites, I just don't understand how to find my answer from the information the websites have provided).

    asked by Needs a bio teacher on March 23, 2008
  8. physics

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

    asked by joel on December 31, 2014
  9. probability

    Let È be the bias of a coin, i.e., the probability of Heads at each toss. We assume that È is uniformly distributed on [0,1]. Let K be the number of Heads in 9 independent tosses. By performing some fancy and very precise measurements on the structure of

    asked by alec on April 14, 2015
  10. math

    A farmer has 110 metres of fencing to fence off a rectangular area. Part of one side is a wall of length 15m. Find the dimensions of the field that give the maximum area. Answers: length and width = 31,25m Thank you so much for a huge help.

    asked by Lucas on October 22, 2013
  11. Engineering science

    A boat start sailing on Monday 10:00 at harbour A and sails 600km due north. Later it turns east for a further 420km to reach harbour B on Tuesday at 12:00.a)find total displacement from A-B average. b)speed of the trip.c)average velocity

    asked by Lang on October 14, 2019
  12. simple harmonic motion

    Quick question: I need to find the acceleration, velocity and displacement at the mid point of SMH. So I know these are the equations: x(t) = Asin(ωt + φ) vx(t) = Aω cos(ωt + φ) ax(t) = −Aω2 sin(ωt + φ) I assume that the displacement is greatest

    asked by Anon on October 27, 2017
  13. Calculus

    Alright, I want to see if I understand the language of these two problems and their solutions. It asks: If F(x) = [given integrand], find the derivative F'(x). So is F(x) just our function, and F'(x) our antiderivative? 1) F(x) = ∫(2, x)

    asked by Justin on November 4, 2015
  14. math

    An open box is to be made from a rectangular piece of tin 12 inches long and 10 inches wide by cutting pieces of x-inch square from each corner and bonding up the sides. find the formula that expresses the volume of the box as a function of x.

    asked by jeniza on June 23, 2011
  15. Algebra 2

    A bridge is designed with cables that connect two towers that rises above a roadway. Each cable is modeled by the function, H(x)=1/9000x2-7/15x+500, where x and h(x) are measured in feet. a. what is the height above the road of a cable at it's lowest

    asked by Luke on October 23, 2011
  16. Math

    find the constant of proporionality and the unit rate for the data in the table. Then write an equation to represent the relationship between time t and distance d. Time(hours) Distance(miles 2 90 3 135 5 225 6 270 I need help asap i'm in connexus its a

    asked by Lily on April 5, 2018
  17. physics

    A cricket pitch roller of diameter 1.5 m has a mass of 450 kg; it is pulled by a handle attached to its centre. Find the minimum force to pull up a step which is 250 mm high if the roller handle makes an angle of 30o with the horizontal.

    asked by Romaine on November 9, 2014
  18. HTT / 230 please help

    i need help i can not understand this Question i don't know where to find the answer i have been looking for hours please some one help me ! Question is my is in hospitality finances class Explain why depreciation expense should be added back when

    asked by Beckylynn on December 5, 2013
  19. Calculus

    A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. The total volume of the solid is 2 cubic centimeters. Find the radius of the cylinder that produces the minimum surface area. (Round your answer to three decimal

    asked by Ashley on November 7, 2012
  20. math

    Question Part Points Submissions Used Verify that the function satisfies the three hypotheses of Rolle's Theorem on the given interval. Then find all numbers c that satisfy the conclusion of Rolle's Theorem. (Enter your answers as a comma-separated list.)

    asked by joe on October 17, 2012
  21. Social Studies

    I'm writing an essay on North Korea. A few years ago in Social Studies, I remember watching a documentary that featured Americans who were illegally in North Korea to do charity work so there would be less starvation. Would you be able to help me find some

    asked by Jennifer on October 17, 2009
  22. Chemistry

    Find the energy( in KJ) of a wave with the wavelength of 507 nm. First, I turn the 507 nm into meter then divide the speed of light by it which give me the frequency. Then I take the frequency and multiply by the planck. Then I would convert the Joule to

    asked by Shadow on November 7, 2012
  23. Spanish Help

    Si yo _________ (omitir) algo en esta carta, lo siento. a.omitimos b.omiten c.omito d.omites I know omitir means skip, and I know what the sentence says. I wanted to know if anyone could find me anything helpful when it comes to -IR verbs? I do not get the

    asked by Katt<3Bobby on November 30, 2014
  24. Social Studies

    Where can I find information on the lifestyles in the Southeastern U.S. in 1906? This article has some information. http://en.wikipedia.org/wiki/Southern_United_States#20th_century https://www.cia.gov/cia/publications/civilwar/docs/p31.htm

    asked by Anne on October 23, 2006
  25. algebra

    a local grocery store has plans to construct a rectangular parking lot that is bordered on one side by a highway. there are 1280 feet of fencing avaliable to enclose the other three sides. find the dimensions that will maximize the area of the parking lot.

    asked by Anonymous on November 30, 2010
  26. physics

    A mass of 3.25 kg is attached to the end of a spring that is stretched 20 cm by a force of 14 N. It is set in motion with an initial position x_0 = 0 and initial velocity (in m/s) v_0 = -11. Find the amplitude, period, and frequency of the resulting

    asked by RAj on October 17, 2014
  27. physics

    Find the vector components along the directions noted in parentheses. a. a car displaced 45degrees north of east by 10.0 km (north east) b. a duck accelerating away from a hunter at 2.0meter per second squared at an angle of 35degrees to the ground

    asked by i love polka on October 4, 2008
  28. statistics

    any state auto insurance company took a random sample of 370 insurance claims paid out during a 1-year period. the average claim was $750 with a standard deviation of $150. find .99 confidence interval for the mean claim payment.

    asked by b on April 27, 2012
  29. MATH HELP

    Find the periodic payments necessary to accumulate $20,000 in a sinking fund paying 4% per year, with monthly payments for 5 years. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest cent.)

    asked by Sabrina on March 11, 2009
  30. math

    Let S be a set of 31 equally spaced points on a circle centered at O, and consider a uniformly random pair of distinct points A and B (A,B∈S). The probability that the perpendicular bisectors of OA and OB intersect strictly inside the circle can be

    asked by Mathslover on May 27, 2013
  31. physics

    Three charges are fixed in the x−y plane as follows: 1.5nC at the origin (0, 0); 2.6nC at (0.65m , 0); –1.8nC nC at (0, 1.50m ). Find the force acting on the charge at the origin. Express your answers using two significant figures. Enter the x and y

    asked by James on January 27, 2014
  32. ^HYDRAULICS AND HYDROLOGY^

    Pls...,need help. QUESTION=Water flows through a pipe of diameter 300mm with a velocity of 5m/s.if the coefficient of friction is given by f=(0.015)+(0.08/Re^0.3) where Re is the Reynoid number. Take kinematic viscosity of water as 0.01stoke. *Find the

    asked by Ekingdeft on February 6, 2016
  33. Physics

    A 750 kg car traveling 22.0 m/s due north crashes into a 1500 kg truck traveling 20 m/s due west. The two vehicles become locked together and travel 19.0 m before stopping. Find the average frictional force (magnitude and direction) that brings the two to

    asked by Chad on August 10, 2012
  34. Algebra II Part 2

    The equation h=7 cos{pi/3 t} models the height h in centimetres after t seconds of a weight attached to the end of a spring that has been stretched and then released. Find the times at which the weight is at a height of 1 cm,of 3 cm,and of 5 cm below the

    asked by Karen on May 18, 2013
  35. statistics

    The diameter of small Nerf balls manufactured at a factory in China is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inch. Suppose a random sample of 20 balls is selected. Find the interval that

    asked by Josh on June 28, 2012
  36. Maths

    Let S be a set of 31 equally spaced points on a circle centered at O, and consider a uniformly random pair of distinct points A and B (A,B∈S). The probability that the perpendicular bisectors of OA and OB intersect strictly inside the circle can be

    asked by Someone need help~ on May 26, 2013
  37. Social

    What was the bonus army, why were they protesting and what happened to them? i cant find this anywhere soooo plez helppppp thanks

    asked by Joe on March 22, 2007
  38. algebra II Part 2

    The equation h=7 cos{pi/3 t} models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched an then released. (C).Find the times at which the weight is at a height of 1 cm,of 3 cm,and of 5 cm below

    asked by Karen on May 19, 2013
  39. algebra

    The polynormial 0.041h-0.018a-2.69 can be used to estimate the lung capacity in liters of a female with height h, in cetimeters, and age a, in years. Find the lung capacity of a 40-year old woman who is 190 centimeters tall. Round to the nearest hunderd.

    asked by jackie on September 2, 2010
  40. Algebra

    Justin recently drove to visit his parents who live 480 miles away. On his way there his speed was 20 miles per hour faster than on his way home (he ran into bad weather). If Justin spent a total of 20 hours driving. Find the two rates.

    asked by Scotch on March 22, 2016
  41. physics

    A 5kg object placed on a frictionless, horizontal table connected to a string that passes over a pulley and then is fastened to a hanging 9kg object. Draw a free body diagram of both the objects. Find the acceleration of the two objects and the tension in

    asked by Chansa on May 4, 2016
  42. social studies

    There was a crossword puzzle in issue 24 of the N.C weekly reader...8 across and neither my child nor myself could find the answer, she answered all of the rest of the puzzle words, but this one stumped her and it did me as well, the question was, "N.C to

    asked by Lee on May 15, 2017
  43. algebra math, 8th grade

    At a halftime show, a marching band marched in formation. The lead drummer started at a point with coordinates (-2 -5) and moved up 3 steps and 1 step right. I need to write a rule to describe the translation, and I also need to find the coordinates of the

    asked by Tazia on December 6, 2017
  44. Trig

    I need help with these kind of problems. We are dealing with word problems and/or pictures that are solved by the Law of Sin or Cosine. If any one kows a wonderful web site that can help with these, I would greatly appreciate it. A parollelogram has side

    asked by Jennifer on November 9, 2009
  45. History (Western Civilization)

    Explain the importance of the Hebrews to the development of western civilization including the ideas of monotheism, the covenant, the Torah and Christianity. - Can someone briefy explain to me? I am searching through goggle but can not find the right

    asked by C.J on September 6, 2013
  46. algebra

    The polynormial 0.041h-0.018a-2.69 can be used to estimate the lung capacity in liters of a female with height h, in cetimeters, and age a, in years. Find the lung capacity of a 40-year old woman who is 190 centimeters tall. Round to the nearest hunderd.

    asked by Jackie on September 1, 2010
  47. HUM 130

    I can not fine these words like in Hindu terms. Karma Reincarnation I did this one as far as I define it. Yoga Guru Chakras I have never heard of the words I havent defined yet. What is your personal understanding of each of these terms? What differences

    asked by dawn on November 27, 2007
  48. physics

    A vertical spring stretches 13 cm when a 2.3 kg block is hung from its end. (a) Calculate the spring constant. This block is then displaced an additional 3.2 cm downward and released from rest. Find the (b) period, (c) frequency, (d) amplitude, and (e)

    asked by Mariaaaaaaa on September 17, 2016
  49. calculus

    Find the dimensions of the right circular cylinder of greatest volume which can be inscribe in a right circular cone with radius of 5 inches and a hieght of 12 inches(hint:use similar triangle property).also draw a label diagram....plz answer its too

    asked by daan on November 7, 2010
  50. HUM 130

    I can not fine these words like in Hindu terms. Karma Reincarnation I did this one as far as I define it. Yoga Guru Chakras I have never heard of the words I havent defined yet. What is your personal understanding of each of these terms? What differences

    asked by dawn on November 27, 2007
  51. Decision Sciences/Models

    Does anyone have expereince using the palisades tool package programs sucah as @risk and precisiontree in making decision making models? yes is it possible to email you a copy or post a copy of my case. i did it but im stuck on sensitivity analysis which i

    asked by Joe on October 12, 2006
  52. math

    The minimum daily value (MDV) for certain foods are given. They are based on a 2,000 calorie per day diet. Find decimal and fractiona notation for the percent notation. 1/2 cup of campbells' new england clam chowder provider 6% of the MDV of iron

    asked by Peggie on September 2, 2008
  53. physics

    A shot-putter moves his arm and the 7.0 kg shot through a distance of 1 meters iving the shot a velocity of 10 m/s from rest. Find the average force exerted on the shot during this time how do you solve this problem. Is this question related to Kinetic

    asked by Omari on March 31, 2010
  54. Physics...help!

    A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.30. Its velocity at point A is 7.6 m/s and at point B is 4.0 m/s. Use the impulse-momentum theorem to find how long (in s) the sled takes to travel from A to B.

    asked by Me on October 26, 2011
  55. maths-need help asap

    how many litres of kerosine can be held by a cylindrical 21cm deep? Live your answer to 2 significant figure (2).a conical vessel is 10cm deep.if it half filled with liquid,find the depth of the liquid #thanks working or hint plz

    asked by maths-lover on June 3, 2016
  56. Physics

    A Sunway train starts from rest at a station and accelerates at a rate of 2.0 ms^-2 for 10 s. It runs for constant speed for 50 s and slows down at a rate of 3.5 ms^-2 until it stops at the next station. Find the total distance covered Draw the velocity vs

    asked by Molly on September 28, 2016
  57. math

    "The area of a rectangle is 360m2. If its lengh if increased by 10m and its width is decreased by 6m, then its area does not change. Find the perimeter of the original rectangle." I need to use the "guess and test" or the "draw a diagram" method to solve;

    asked by john on February 18, 2013
  58. Physics

    A cyclist starts from rest and accelerates at 2m/s2, for 2second. Her velocity remains constant for the following 4second. The brakes are then applied and the bicycle decelerates uniformly until it comes to rest after 10 second. Find(a) the distance moved

    asked by Physics on March 29, 2016
  59. physics

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

    asked by Ayman on October 14, 2017
  60. Physics

    10 mol of an ideal gas expands isothermally at 373 K to 2.6 times its initial volume. Find the heat flow into the system. The universal gas constant is 8.31 J/K · mol. Answer in units of J. Any help much appreciated, I have no idea where to begin with

    asked by Dj on April 16, 2017
  61. physics

    TWo identical l-5.0-kg balls, Figure P5.85 each 25.0 cm in diameter, are suspended by two 35.0-cm wires (Fig. P5.85). The entire apparatus is supported by a single 18.0-cm wire, and the surfaces oi the balls are perf'ectly smooth. (a) Find the tension in

    asked by Mon on March 30, 2017
  62. chem

    In the formation of sulfur hexaflouride, does the reaction at constant pressure or volume proceed more spontaneously? I've done the calcs to show that at constant volume, it is slightly more spontaneous, but I can't seem to find a good reason why... it

    asked by xX_Supaman_Xx on January 28, 2008
  63. Physics

    Two blocks with masses m1 = 3.9 kg and m2 = 6.7 kg are connected by a string that hangs over a pulley of mass M = 2.2 kg and radius R = 0.11 m as shown above. The string does not slip. Assuming the system starts from rest, use energy principle find the

    asked by John on November 28, 2011
  64. Math

    An aircraft which is maintaining a constant altitude of 1000 meters is travelling directly away from an observer. At a particular instant the sngle of elevation is 52 degrees and 12 seconds later the angle of elevation is 16 degrees. Find the distance

    asked by Haiano on June 2, 2014
  65. Science Physics

    A pitched ball is hit by a batter at a 50° angle and just clears the outfield fence, 97 m away. Assume that the fence is at the same height as the pitch and find the velocity of the ball when it left the bat. Neglect air resistance. whats the answer m/s

    asked by Gogol on December 29, 2010
  66. chemistry

    the percentages of carbon,hydrogen and oxygen in vitamin c were determined by burning a sample weighing 2.00mg,the masses of carbondioxide and water formed are 3.00mg and 0.81mg respectively.from these information,find the percentage of each element and

    asked by yankoua on October 28, 2009
  67. Engineering science

    A boat start sailing on Monday 10:00 at harbour A and sails 600km due north. Later it turns east for a further 420km to reach harbour B on Tuesday at 12:00.a)find total displacement from A-B average. b)speed of the trip.c)average velocity

    asked by Isaac B.Acheampong on May 5, 2017
  68. banking

    Your bank statement has arrived and shows an ending balance of $972.25. After reconciling the checks and deposits that have cleared, you find you have check #1234 for $15.00, #1235 for $9.23, and #1236 for $22.50 and two deposits of $123.56 and $156.78 as

    asked by pj on August 2, 2014
  69. math

    Justin recently drove to visit his parents who live 96 miles away. On his way there his average speed was 20 miles per hour faster than on his way home (he ran into some bad weather). If Justin spent a total of 4 hours driving, find the two rates.

    asked by crystal on July 26, 2019
  70. geometry

    Miguel looks out from the crown of the Statue of Liberty approximately 250 ft above ground. He sights a ship coming into New York harbor and measures the angle of depression as 18 degrees. Find the distance from the base of the statue to the ship to the

    asked by kaelan on May 4, 2012
  71. Science

    Two blocks with masses m1 = 3.9 kg and m2 = 6.7 kg are connected by a string that hangs over a pulley of mass M = 2.2 kg and radius R = 0.11 m as shown above. The string does not slip. Assuming the system starts from rest, use energy principle find the

    asked by John on November 30, 2011
  72. stats

    Assume that​ women's heights are normally distributed with a mean given by mu equals 63.4 in​, and a standard deviation given by sigma equals 1.8 in. Complete parts a and b. a. If 1 woman is randomly​ selected, find the probability that her height is

    asked by wendy on July 28, 2018
  73. Math

    The Basketball Birthday Batter Package at a Minor league ballpark costs $192. The Package includes tickets, drinks, and cake for A group of 16 children. Write an equation To find the cost per child. 16c = $192

    asked by NEED HELP ASAP on October 20, 2014
  74. Government US

    35. All of the following are true of the Head Start program except that it a. began as part of the War on Poverty in the 1960s . CORRECT c. has been weakened by children’s unsupportive environments at home. I DON'T KNOW d. is fully funded at the present

    asked by HM on October 10, 2011
  75. social studies

    please check my answer: why did african americans go from the rural south to northern cities starting in the late 1800s? - so they could be around other races and cultures - to change identities - to escape the discrimination and to find better jobs ** -

    asked by ramen on March 14, 2017
  76. Chemistry

    a 6.0 mole sample of Ca3(PO4)2 and a 12.0 mole sample of SiO2 react in an evacuated vessel. after one of the reactants is fully consumed, how much of the gas is created? How exactly would you solve this problem? Would you have to find the molar mass of

    asked by Allison on November 18, 2015
  77. Theory of machines

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

    asked by Rahul on January 18, 2015
  78. inverse function question

    Hey, I'm having trouble fully understanding absolute value graphs and I've been asked find the largest value of a so that f^-1 exists for the function: f: (-efinity,a) --> R where f(x)= logel2x-1l *note: i have used 'l' to represent the straight line

    asked by elle on November 8, 2007
  79. Physics

    1.)A force of 250 is just sufficient to start a 50 kg steel trunk moving across a wooden floor. Find the coefficient of static friction. 2.) compute the acceleration of the block sliding down a 30 deg inclined plane if the coefficient of kinetic friction

    asked by John on August 22, 2014
  80. Math

    You shop for bikes and find 7 types priced at 119 139 149 179 189 199 and 209. you want to buy the 189 bike would you use the mean median and mode to convince your parents that this is a reasonable price for a bike? explain Please help me

    asked by PLEASE HELP on June 9, 2016
  81. Math!

    Change both measurements to the same unit of measure and find the scale factor. 1) 1ft model of a 1in. fossil 2) 20cm model of a 28m rocket 3) 2ft model of a 30yd sports field 4) 3ft model of a 5yd whale

    asked by Person on December 6, 2017
  82. nqwiliso s.s.s.

    three forces act on a body.forceof 30N and 25N act to east and a force of 40N acts to the west.draw a fully labelled scale vector diagram to find the magnitude and direction resultant force use 1 mm : 1N.

    asked by sigwetsha liveni on November 6, 2014
  83. physics

    a cannonball is fired horizontally from the top of a cliff. the cannon is at height H=60.0m above ground level , and the ball is fired with initial horizontal speed v_0 .assume acceleration due to gravity to be g=9.80 find d/2 int terms of v_0

    asked by boboooo on November 27, 2011
  84. English

    I wonder if your science experts can be help find material (general information, word lists) in English which is needed to talk about biodiversity in water and waterways and microbiological analysis of water. This would be for biologists who are familiar

    asked by Henry2 on November 29, 2011
  85. college math

    A business associate who owes you 3600 dollars offers to pay you 3360 now, or else pay you three yearly installments of 1200 each, with the first installment paid now. Assume that the interest rate will be 7 percent (compounded continuously). Find the

    asked by aj on March 14, 2011
  86. Government

    How is a court case played out? As in, first then Judge is introduced, then what? And so on, I can't find it anywhere on the internet Thank you for using the Jiskha Homework Help Forum. You might watch Judge Judy, for example, or any other "court session"

    asked by Ryan on May 17, 2007
  87. Math

    500$ is invested at 8.5% compounded annually. Find how long it will take until the fund grows to $800 The function g(x)= 23(1-.06)^x gives the Celsius temperature in x minutes after a large quantity of ice has been added to a bowl of water. When will the

    asked by kaylarae on April 5, 2010
  88. calculus...plz ans urgent

    Find the dimensions of the right circular cylinder of greatest volume which can be inscribe in a right circular cone with radius of 5 inches and a hieght of 12 inches(hint:use similar triangle property).also draw a label diagram....plz answer its too

    asked by daan on November 7, 2010
  89. Mechanics (A level), Please help

    A light string of length a is attached to two points A and B on the same level and distance b apart, where b < a. A smooth ring of weight W is threaded on the string and is pulled by a horizontal force P, so that it rests in equilbrium vertically below B.

    asked by John on April 1, 2012
  90. chemistry

    I wonder if your science experts can help me find material (general information, word lists, books) in English about biodiversity in water and waterways and microbiological analysis of water. This would be for Italian biologists who are familiar with the

    asked by Henry2 on November 29, 2011
  91. chemical experiment

    If a 200-mm test tube is substituted for the gas buret in a Aluminum Analysis experiment ( collect H2 from the sample ,and measure its pressure and volume , then, find out its number of moles and Aluminum's percent in the sample) ,indicate the additional

    asked by lamis on October 4, 2011
  92. uv,,math

    find the distance between the cities,,assume that thee earth is a sphere radius of 4000 miles at that cities are on same longitude, one city is due north of the order,,,San Francisco California has 37 degree 47'36" while Seattle,Washington 47 degree 37'18"

    asked by glenn on September 14, 2016
  93. CALCULUS

    A cone shaped paper drinking cup is to be made from a circular piece of paper of radius 3 inches by cutting out a sector of the circle and gluing the straight edges together. Find the angle of the cut that gives the cup with the largest capacity.

    asked by Sissy on October 20, 2012
  94. physics ap

    we'l find the time, t, for the ball to fall from the tabletop to the floor. use the equation Δy=viΔt+at^2/2. Take the vi to be zero and a to be 9.81 ±.02 m/s^2. you must first solve this equation for t. Δy=.922m what am i suppose to do with the

    asked by Anthony on February 4, 2017
  95. Mechanics

    Two blocks with masses m1 = kg and m2 = kg are connected by a string that hangs over a pulley of mass M = kg and radius R = m as shown above. The string does not slip. Assuming the system starts from rest, use energy principle find the speed of m2 after it

    asked by Costa on December 3, 2011
  96. pre-calc please help!!

    an open box with a volume of 1500cm cubed is to be constructed by taking a piece of cardboard of 20 cm by 40 cm, cutting squares of sides length x cm from each corner and folding up the sides. show that this can be done in two ways, and find exact

    asked by steph on November 10, 2011
  97. Algebra

    The Basketball Birthday Batter Package at a Minor league ballpark costs $192. The Package includes tickets, drinks, and cake for A group of 16 children. Write an equation To find the cost per child. 16c = $192

    asked by Mike on October 20, 2014
  98. Physics

    A constant torque of 22.9 N·m is applied to a grindstone whose moment of inertia is 0.168 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the grindstone has made 17.1 rev, assuming it started from rest. Answer in

    asked by dallas on April 2, 2013
  99. physics

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

    asked by Anonymous on October 14, 2017
  100. Physics

    A car uniformly accelerates from 0 to 27.0 m/s. A 68.0-kg passenger experiences a horizontal force of 390.0 N. 1)How much time does it take for the car to reach 27.0 m/s? (Express your answer to three significant figures.) My teacher didn't explain how we

    asked by Casey on November 7, 2016

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