1. Discrete Math

    I was hoping if you could help me to solve this problem. Thank you. A department wants to schedule final exams so that no student has more than one exam on any given day. There are 7 vertices of degrees 3,3,4,4,4,5,6 which show the courses that are being

    asked by yengiang on April 22, 2011
  2. Chemistry``

    A substance (CD) decomposes into C and D. CD(g)  C(g) + D(g) At the temperature of the experiment, 15.0 percent of CD is decomposed when equilibrium is established. a) If the initial concentration of CD is 0.200 mol/L, what are the equilibrium

    asked by Linda on May 8, 2007
  3. Physics

    The crystalline lens of the human eye is a double convex lens made of material haveing an index of refraction of 1.44. Its focal length in air is about 8 mm which also varies. We shall assume that the radii of curvature of its two surfaces have the same

    asked by J on April 7, 2008
  4. statistics

    Based on data collected by the National Center for Health Statistics and made available to the public in the Sample Adult database, an estimate of the percentage of adults who have at some point in their life been told they have hypertension is 23.53

    asked by Hussain on March 21, 2019
  5. Chemistry -- to Dr.Bob

    I posted this yesterday and tried to work it out today but i don't remember how to. You said convert to moles by multiplying for example .1M x .008L= 8x10^-4 ...after this what do i do with this number to find the pH i tried to just plug that into the

    asked by Amy on May 2, 2008
  6. Science

    I have homework in which it asks "Describe the difference between elements, mixtures and compounds. (I have done the first sentence as it was fairly easy. Next is the part I don't understand) You need to draw their chemical formulae (for example KCl for

    asked by Ryan on September 26, 2015
  7. physics

    A 2kg block situated on a rough incline is connected to a spring of negligible mass having a spring costant of 100N/m.the pulley is frictionless.the block is released from rest when the spring is unstretched.the block moves 20 cm down the incline before

    asked by virginia on April 2, 2015
  8. Physics

    A uranium nucleus (mass 238 u, charge 92e) decays, emitting an alpha particle (mass 4 u, charge 2e) and leaving a thorium nucleus (mass 234 u, charge 90e). At the instant the alpha particle leaves the nucleus, the centers of the two are 5.5fm apart and

    asked by Nguyen Nguyen on February 26, 2015
  9. Physics

    1. A particle moving with simple harmonic motion has maximum displacement of 50 cm angular velocity of 1.02rad/s. Calculate the (a) the maximum velocity (b) maximum acceleration of the particle (c) the speed and acceleration of the particle when it is 30cm

    asked by Michael O. Davies on April 2, 2018
  10. check answer pls

    1. patricia owned so many posters that she decided to sell 77 of them to her friends . after selling the posters , she still has 186 left . write and solve an equation to find the number of posters p patricia had originally . A. p+77 = 186 ; 109 posters B.

    asked by math help on November 17, 2016
  11. English

    1. I am somewhat reserved, so I don't talk too much. 2. It's not easy to understand other's personality. 3. My friend's character is opposite to mine. 4. I and my friend are similar in character. 5. I am quite different from my brother in character. 6.

    asked by John on March 4, 2009
  12. Math - Algebra

    Six small marbles and four large marbles have a combined weight of 30 g, whilst seven small marbles and two large marbles have a weight of 23 g. Find the weight of a large marble. Can someone help me create the equation? Thanks.

    asked by Anonymous on January 13, 2017
  13. Algebra

    Someone bought 7 ears of corn and 6 oranges for $3.66. At the same time a second person bought 10 ears of corn and 3 oranges for $3.39. Find the price of each. Answer: oranges would be .78 cents and corn would be .41 cents each

    asked by HELP! on January 13, 2015
  14. Math

    Kristin worked a total of 10 1/2 hours over 2 days. She worked 6 3/4 hours the first day and h hours the second day. Which equation represents how to find the number of hours Kristin worked the second day? A. 6 3/4h=10 1/2 B. h-6 3/4=10 1/2 C.10 1/2h= 6

    asked by Mathew on March 11, 2018
  15. physics

    Vector A has a magnitude of 23 units and points in the positive y-direction. When vector B is added to A, the resultant vector A+B points in the negative y-direction with a magnitude of 15 units. Find the magnitude of B?

    asked by jc on September 21, 2010
  16. math - 5th grade ratios

    The ratio for makig 4 gallons of light yellow paint is 1 gallon of white / 3 gallons yellow. Find the ratio for making 20 gallons of light yellow paint.

    asked by ImLost on May 13, 2009
  17. Caluclus

    Find the absolute maximum and absolute minimum of f on the interval (-1,2]: f(x)=(-x^3+x^2+3x+1)/(x+1) A. Maximum: (1, -2); Minimum: (-1, 2) B. Maximum: (1, -2); Minimum: None C. Maximum: None; Minimum: None D. Maximum: None; Minimum: (-1, 2) E. None of

    asked by Anonymous on January 11, 2015
  18. math

    amy drove her car the same distance in six hours that juan drove his car in 5 1/2 hours. find the speed (rate) of amy's car, given that she drove 5 mi/h slower than juan.

    asked by roy on September 16, 2009
  19. Economics

    The mean marks obtained in an examination by a group of 100 students were found to be 49.46 the mean marks obtained in same examination by a group of 200 students were 52.32 find out mean of marks obtained by both the groups together

    asked by Pander on June 27, 2018
  20. math!!

    Three numbers are in an arithmetic progression; three other numbers are in a ge- ometric progression. Adding the corresponding terms of these two progressions yields 32, 26, and 32. The sum of the three terms of the arithmetic progression is 51. Find the

    asked by Sara V. on May 3, 2017
  21. AP Calculus BC

    A cylindrical tank is constructed to have a diameter of 5 meters and a height of 20 meters. Find the error in the volume if: (a) the diameter is exact but the height is 20.1 meters (b) the height is exact, but the diameter is 5.1 meters.

    asked by J'vonte on April 14, 2010
  22. Physics

    Vector {A} points in the negative y direction and has a magnitude of 14 units. Vector {B} has twice the magnitude and points in the positive x direction. Find the direction and magnitude of {A}+{B} counterclockwise from the positive x axis.

    asked by Jan on February 4, 2012
  23. Linear Algebra

    (a) Show that if A is an m x n matrix and A(BA) is defined, then B is an n x m matrix. (b) Show that if A has a row of zeros and B is any matrix for which AB is defined, then AB also has a row of zeros. (c) Find a similar result involving a column of

    asked by Chris on September 15, 2009
  24. dma 040

    Area of a certain state(state1) is five times the area of another state(state2). If the sum of their area is 6,000,000 square miles, find the are of each state state1 state2

    asked by Anonymous on September 15, 2013
  25. Chem

    The heat of vaporization of ammonia is 23.4 kj/moles. How much heat is required to vaporize 1.00kg of ammonia? How many grams of water at 0 degree celcius could be frozen to ice at 0 degree celcius by evaporation of this Amount of ammonia? I got the kj by

    asked by Feather on May 23, 2015
  26. Physics

    A dart gun is aimed horizontally at the center of a large target 150 m away. The initial velocity of the dart is 450 m/s. (Ignore air resistance) a) Where does the dart strike the target (relative to the center of the target)? b) To hit the center of the

    asked by Jacob on December 6, 2014
  27. physics

    I have no way to solve this question. help me please The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the

    asked by Lola on June 24, 2015
  28. English

    i need notes on each chapter of the book The Wave by todd strasser please if u can thank you http://search.yahoo.com/search?ei=utf-8&fr=slv1-adbe&p=The+Wave+by+todd+strasser Since this book was copyrighted in 1981, and copyrights last for 70 years and can

    asked by Anonymous on January 31, 2007
  29. Physics

    A ferry is crossing a river. The ferry is headed due north with a speed of 1.7 m/s relative to the water and the river’s velocity is 2.4 m/s to the east. a) What is magnitude of the boat’s velocity relative to Earth? Answer in units of m/s b) Find the

    asked by Crystal on October 8, 2012
  30. Math 11

    I need help on this math problem. The width of a certain painting is 5cm less than twice the length. The length of the diagonal distance across the painting is 107cm. Find the length and width. Round your answer to 2 decimal places. Substitute: diagonal

    asked by Need Help on January 11, 2012
  31. Science

    Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.00 during the first second. How far does it travel during the second second? How fast is it moving at the end of the first second? How fast is it moving at the end of

    asked by Morgan on September 19, 2006
  32. Math

    The number of gallons of water remaining in a swimming pool t minutes after the drains are opened and the pool begins emptying is give given by the function f(x)=40t^2-3000t+40,000gallons. Exactly 2 minutes after the drains are opened, the pool was

    asked by Chase on February 23, 2013
  33. Algebra

    In 1915, the tallest flagpole in the world was in San Francisco. a. When the angle of elevation of the sun was 55 degrees, the length of the shadow cast by this flagpole was 210 ft. Find the height of the flagpole to the nearest foot. b. What was the

    asked by Lavanda on December 19, 2012
  34. Chemistry

    A sample of iron reacted with hydrochloric acid. The liberated hydrogen occupied 40.1 mL when collected over water at 27 C at a barometric pressure of 750 torr. What is the mass of the sample of iron? (Because of the collection of gas over water, the vapor

    asked by Kate on April 8, 2013
  35. physics

    A light spring having a force constant of 130N/m is used to pull a 7.50kg sled on a horizontal frictionless ice rink. The sled has an acceleration of 2.50m/s^2? Part A: By how much does the spring stretch if it pulls on the sled horizontally? X=0.144m Part

    asked by lori on September 26, 2013
  36. math/geometry

    Oil from a drum leaks into water surrounding the drum, creating a circular oil slick 100 square feet in area.Find the scale factor of the size transformation of the oil slick when it is 450 square feet in area. Round to the nearest hundredth.Where is the

    asked by breck on April 20, 2014
  37. Algebra

    What would be the missing piece of information given the following information: Find the slope of the line that passes through the points (2, 6) and (4, 10). m = ? a. 2 b.6 c. 1 d. 9 I think it is c. Remeber the definition of a slope. It is the change in y

    asked by Margie on October 14, 2006
  38. History

    Help please You want to find a painting of Abraham at a religious art exhibit Where are you more likely to have success? in the Jewish, Christian, or Muslim displays only in the Jewish displays in the Christian and possibly the Jewish displays In the

    asked by Loom on February 9, 2017
  39. Climate Physics

    Find the insolation in Wm^-2 at summer solstice for a low obliquity of 22 degrees? I used the following: h_0=cos^-1(-tan(phi)* tan(delta)) cos(theta)=[sin(phi)*sin(delta)+cos(phi)*cos(delta)*cos(h_0)] Result was 397 Wm^-2 This looked like an easy problem,

    asked by Alice on March 5, 2016
  40. earth-physics

    The Earth has an angular speed of 7.272 10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 1.07 1022 kg) hits the Earth while traveling at a speed of 1.30 103 m/s (assume the asteroid is a point mass compared to the radius of the

    asked by huiol on February 26, 2012
  41. math

    Suppose a basketball player is an excellent free throw shooter and makes 91% of his free throws (i.e., he has a 91% chance of making a single free throw). Assume that free throw shots are independent of one another. Suppose this player shoots five free

    asked by Sarah on September 4, 2010
  42. statistics

    The red face cards and the black cards numbered 2-9 are put into a bag. Four cards are drawn at random without replacement. Find the following probabilities: a) All 4 cards are red b) 2 cards are red and two cards are black c) At least one of the red cards

    asked by oscar on December 12, 2010
  43. Algebra 3 and trig

    An ocean liner is 177 miles due west of lighthouse A. Lighthouse B is 265 miles due south of lighthouse A. Find the distance from lighthouse B to the liner and the bearing of the ocean liner from lighthouse B.

    asked by Lauren on June 12, 2013
  44. physics

    Two point charges, the first with a charge of +3.19×10^−6 C and the second with a charge of -4.32×10^−6 C , are separated by 28.0 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force

    asked by Cooper on January 23, 2012
  45. Physics

    Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force

    asked by Diddy on April 5, 2011
  46. Geometry

    Angle ABC and ange DBE are vertical angles,the measure of angle ABC =3x+20, and the measure or angle DBE =4x-10. Write and solve an equation to find the measure of angle ABC and the measure of angle DBEin

    asked by Amber on September 2, 2012
  47. algebra help please

    The area of a rectangle of length x is given by 3x^2+5x find the width of the rectangle a=l*w =x*(3x+5) I stoped here I am not sure if I am correct i was taken the 3x+5 as the width and x as the length but i am not sure if the 3x+5 should be the area and

    asked by larry on April 24, 2007
  48. Physics

    Your 2.85kg physics book rests on a horizontal tabletop. A. Find the normal force on the book. B. Suppose you pull up on the book with a 15.0N force, now what's the normal force? C. Suppose you push down on the book 15.0N Force now what's the normal force?

    asked by Jessica on September 20, 2012
  49. Physics (PLEASE HELP!)

    Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force

    asked by Allison on April 4, 2011
  50. Math

    The population of town A increases from 1,346 to 1,500. In the same period, the population of town B increases from 1,546 to 1,800. a. Find the percent of increase in population for town A and for town B. b. Which town had the greater percent of increase?

    asked by Eric on December 13, 2012
  51. Geometry

    Angle ABC and ange DBE are vertical angles,the measure of angle ABC =3x+20, and the measure or angle DBE =4x-10. Write and solve an equation to find the measure of angle ABC and the measure of angle DBEin

    asked by Amber on September 2, 2012
  52. Physics

    Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force

    asked by mink on April 5, 2011
  53. math

    A map distance of 5 inches represents 200 miles of actual distance. Suppose the distance between two cities on the map is 7 inches. What is the actual distance between the two cities? Write the rule you used to find the actual distance.

    asked by Anonymous on November 30, 2015
  54. calculus

    When an oil well burns, sediment is carried up into the air by the flames and is eventually deposited on the ground. Less sediment is deposited further away from the well. Experimental evidence indicates that the density (in tons per square mile) at a

    asked by Randy on February 19, 2015
  55. literature-the feminine mystique

    I am currently reading the Feminine Mystique by Betty Friedan for language class. I need only one passage that is the most important one of the book...problem is, I don't have the book with me haha! If anyone has it, and has read it, they would be a

    asked by Michelle on February 6, 2007
  56. early childhood education

    1. Small group discussions with preschools enables them to: A. Find out if they are superior B. Learn to argue C. Outsmart the others and gain teachers attention D. Compare their ideas with peer ideas I choose D 2. Children with many experience with

    asked by jeff on August 16, 2011
  57. college Physics

    You are in closed room somehwere on Earth. You have no compas, gyroscope or GPS. No TV, phone, FAX, emil, computer, internet, or cell. No cable no external connections with outside networks. However you have electricity the regular network and a lab with

    asked by DL on April 12, 2010
  58. English

    Read the following lines from "An Arab Shepherd Is Searching for His Goat on Mount Zion." Searching for a goat or a son has always been in the beginning of a new religion in these mountains Which of the following sentences best explains the meaning of

    asked by Sarah on May 25, 2014
  59. College Physics

    The Daytona 500 stock car race is held on a circular track that is approximately 2.25 miles long, and the turns are banked at an angle of 32.5°. It is currently possible for cars to travel through the turns at a speed of about 189 miles per hour. Assuming

    asked by Anon14 on September 18, 2011
  60. Pre-Calculus

    Driving down Bald Mountain in Wyoming, Bob dean finds that he descends 1600 feet in elevation by the time he is 2.5 miles (horizontally) away from the high point on the mountain road. Find the slope of his descent (Hint: 1 mile = 5280 feet) After

    asked by Caroline on January 10, 2013
  61. physics14

    In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.2 multiplied by 10-17 N during the first 2.2 cm of the tube's length; then they move at essentially constant velocity another 43 cm before hitting the

    asked by jm on February 16, 2012
  62. algebra 2

    You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1.1. the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from

    asked by linda on November 12, 2009
  63. physics6

    In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.2 multiplied by 10-17 N during the first 2.2 cm of the tube's length; then they move at essentially constant velocity another 43 cm before hitting the

    asked by Anonymous on February 16, 2012
  64. ath 116

    the table lists data regarding the average salaries of several profssional athletes in the years 1991 and2001 a) use the data points to find a linear function that fits the data b) use the function to predict the average salary in 2005 and 2010 in 1991 the

    asked by trudy on October 12, 2010
  65. Stats

    The scatter diagram of the lengths and widths of the petals of a type of flower is football shaped; the correlation is 0.8. The average petal length is 3.1 cm and the SD is 0.25 cm. The average petal width is 1.8 cm and the SD is 0.2 cm. 1. One of the

    asked by Judy on March 28, 2013
  66. calculus help

    find the producer's surplus at a price level of p=$150 for the price-supply equation p=S(x)=100-0.25x is received p=200 the final answer is 5000 is this correct and can you do the steps so i can see if i did i correct You have not defined x. Is S supposed

    asked by shanere on December 2, 2006
  67. Stats

    The scatter diagram of the lengths and widths of the petals of a type of flower is football shaped; the correlation is 0.8. The average petal length is 3.1 cm and the SD is 0.25 cm. The average petal width is 1.8 cm and the SD is 0.2 cm. 1. One of the

    asked by Judy on March 28, 2013
  68. Algebra

    a. Suppose that a market research company finds that at a price of p = $31, they would sell x = 74 boxes of product each month. If they lower the price to p = $25, then more people would purchase the product, and they can expect to sell x = 80 boxes in a

    asked by Anonymous on April 29, 2010
  69. Biology

    17. When errors in nucleotide sequencing occur, a. DNA polymerase replaces the incorrect nucleotide with the correct nucleotide b. enzymes dissolve the incorrect nucleotide so DNA polymerase can add the correct one c. purines replace pyrimidines in the DNA

    asked by mysterychicken on February 4, 2010
  70. algrabra 1

    the table lists data regarding the average salaries of several profssional athletes in the years 1991 and2001 a) use the data points to find a linear function that fits the data b) use the function to predict the average salary in 2005 and 2010 in 1991 the

    asked by trudy on October 13, 2010
  71. college

    The yearly cost T, in thousands of dollars, of tuition and required fees at a private college can be approximated by T = (3/5)n + 5, where n is the number of years since 1985. That is, n = 0 corresponds to 1985, n = 5 corresponds to 1990 and so on. Find

    asked by sue on January 5, 2010
  72. Physics

    A research submarine is operating at a depth of 115m in sea water of density 1025kg/m^3. The absolute atmospheric pressure at sea level is 100kPa. The absolute air pressure inside the submarine is twice that at sea level. Find the net force exerted by the

    asked by ToT_Alex on June 6, 2012
  73. Chem

    I'm having a lot of trouble with a simple problem. I have a 3.0% by man solution of H2O2 in H2O. The density of thr solution is 1.0 g/mL. I need to find the molarity. How do I do this? So far I have: 3.0g H2O2 x 1 mol/34.02 g= .0881 mol I'm not sure where

    asked by Christopher on March 23, 2007
  74. Math

    Jessica and her mother return from shopping with 14 packages. They park the car in the parking lot, which is 120 meters away from their house. Then they make several trips to bring the packages into their house. Jessica's mother can carry 3 packages at a

    asked by Tam on October 22, 2013
  75. Math

    Jen figures she has a 70% chance of passing math and an 80% chance of passing history a) What is the probability that she passes math and history? What assumption did you have to make to answer this question? b) What is the probability that she will pass

    asked by Lukas on May 10, 2017
  76. Literature

    I am studying Petrarchan poems in my lit class. Right now I am reading three Petrarchan poems: "The New Colossus" by Emma Lazarus, "Francisco Pertrarch- Sonnet VI", and "Francisco Petrarch- Sonnet CCXX".I need to identify the rhyme scheme of these poems

    asked by Kayden on December 18, 2007
  77. algrabra

    the table lists data regarding the average salaries of several profssional athletes in the years 1991 and2001 a) use the data points to find a linear function that fits the data b) use the function to predict the average salary in 2005 and 2010 in 1991 the

    asked by trudy on October 12, 2010
  78. Microeconomics

    Consider public policy aimed at smoking a.) Studies indicate that the price elasticity of demand for cigarettes currently costs $2 and the government wants to reduce smoking by 20%, by how much should it increase the price? b.) If the government

    asked by Karen on October 21, 2009
  79. physics

    An electrically neutral model airplane is flying in a horizontal circle on a 2.0-m guideline, which is nearly parallel to the ground. The line breaks when the kinetic energy of the plane is 50 J. Reconsider the same situation, except that now there is a

    asked by shaun on February 14, 2013
  80. Biology

    17. When errors in nucleotide sequencing occur, a. DNA polymerase replaces the incorrect nucleotide with the correct nucleotide b. enzymes dissolve the incorrect nucleotide so DNA polymerase can add the correct one c. purines replace pyrimidines in the DNA

    asked by mysterychicken on February 4, 2010
  81. Windows Server 2003 HELP ASAP!!!

    Could please help me with some questions aswell as check the ones I've answered? Thanks! Which of the following media has the largest data storage capacity? a. Zip cartridge b. CD c. DVD (This is what I think the answer is) d. Jaz cartridge Why is hardware

    asked by I_Love_Music on September 30, 2006
  82. math

    Emily has 5u game cards. John has 8/13 fewer game cards than Emily. Find the average number of game cards that Emily and John have in all in terms of u.

    asked by Anonymous on December 15, 2016
  83. math

    A motor travels 20 km/hr faster than the bicycle. If the motor travels 240 km, while the bicycle travels 180 km at the same time. Find the speed of the motor and the speed of the bicycle. thanks :))

    asked by Ari on July 28, 2016
  84. Math

    The probability that a dessert sold at a certain cafe contains chocolate is 74%. The probability that a dessert contains both chocolate and nuts is 24%. Find the probability that a randomly chosen chocolate dessert contains nuts. 17.8%

    asked by IM NOT GOOD AT MATH on May 14, 2019
  85. MATH

    I'M HAVING A PROBLEM WITH THIS PROBLEM,IT SAY'S FIND THE MISSING NUMBER HERE IS AN EXAMPLE PROBLEM, _ + 7 + -7 = -8 ,I NEED HELP WITH THAT . First: + 7 + -7 = 0 ___ + 0 = -8 Do you see what the answer is now? WHAT MISSING NUMBER GO IN THAT SPACE,I DON'T

    asked by TREVIA on July 16, 2007
  86. chemistry

    Silver has two naturally occurring isotopes (Ag-107 and Ag-109). (a) Use the periodic table to find the atomic mass of silver. (b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109? (c) If the mass of Ag-107 is 106.905,

    asked by NEED HELP on September 27, 2010
  87. algebra

    A ball is launched from a slingshot. Its height, h(x), can be represented by a quadratic function in terms of time, x, in seconds. After 1 second, the ball is 148 feet in the air, after 2 seconds the ball is 272 feet in the air. Find the height in feet of

    asked by Anonymous on July 14, 2016
  88. chemistry

    A mixture of 0.2mole of alcohol of A and 0.5 mole of alcohol B has a total vapour pressure of 40mmHg at 298K. if the mixture obeys Raoult's law, find the pure vapour pressure of B at 298K given that the pure vapour pressure of A is 20mmHg at 298K

    asked by Best on May 24, 2019
  89. math

    last week Coughy worked 4 hours more than Achewy. she also worked twice as many hourse as Pokey. altogether, they earned $252. if couphy earns $6.50 per hour, Achewy earns $9 per hour, and Pokey earns $5 per hour, find the number of hours that each worked.

    asked by Josh on June 6, 2012
  90. physics

    The vector position of a 3.80 g particle moving in the xy plane varies in time according to the following equation. r1=(3i+3j)t+2jt^2 At the same time, the vector position of a 5.35 g particle varies according to the following equation. r2=3i-2it^2-6jt For

    asked by ucieng on February 13, 2010
  91. Physics

    The vector position of a 3.80 g particle moving in the xy plane varies in time according to the following equation. r1=(3i+3j)t+2jt^2 At the same time, the vector position of a 5.35 g particle varies according to the following equation. r2=3i-2it^2-6jt For

    asked by ucieng on February 12, 2010
  92. math

    A circle is inscribed in triangle ABC with sides a, b, c. Tangents to the circle parallel to the sides of the triangle are constructed. Each of these tangents cuts off a triangle from ∆ABC. In each of these triangles, a circle is inscribed. Find the sum

    asked by DAS on October 12, 2016
  93. math

    A large truck with a mass of 6500·kg and going 20·m/s east collides with a car whose mass is 1100·kg and which is at rest. If the impulse exerted on the car by the truck is 12000·N·s east, find the impulse exerted by the car on the truck. Take east as

    asked by jen on October 27, 2011
  94. Science

    Where can I find a biography on William Harvey? http://www.accessexcellence.org/RC/AB/BC/William_Harvey.html http://www.accessexcellence.org/RC/AB/BC/William_Harvey.html The other two posts don't seem to work right. Try this one.

    asked by Nicky on October 5, 2006
  95. math

    A ball is launched from a slingshot. Its height, h(x), can be represented by a quadratic function in terms of time, x, in seconds. After 1 second, the ball is 148 feet in the air, after 2 seconds the ball is 272 feet in the air. Find the height in feet of

    asked by jo on February 16, 2016
  96. Grade 6, percentage

    At the beginning of the year,40% of the pupils in the art club were boys.in the middle of the year 25% of the girls left but 8 more boys joined the art club.the number of members became 42.find the total numbers of art club members at the beginning of the

    asked by Peachie on January 17, 2017
  97. physics

    A diamond's index of refraction for red light, 656 nm, is 2.410, while that for blue light, 434 nm, is 2.450. Suppose white light is incident on the diamond at 32.2°. Find the angles of refraction for red and blue light. red light? blue light?

    asked by A on May 14, 2013
  98. Physics

    Vector A has magnitude of 9.77 units and points due east. Vector B points due north. 1) What is magnitude of B, if the vector A+B points 34.7 north of east? 2) Find magnitude of A+B I am not sure what formulas to use for this. If someone could show me how

    asked by Hannah on May 21, 2012
  99. Science/maths

    what are some problems you might encounter when a)finding the volume of a rugby ball b)finding the diameter of a tennis ball c) finding the mass of a grain of sugar can you help me then I help you please w/b a) submerge it in water in a graduated container

    asked by San on March 3, 2007
  100. physics

    A uniform rod of mass M = 0.245kg and length L = 0.49m stands vertically on a horizontal table. It is released from rest to fall. (a) Calculate the angular speed of the rod, the vertical acceleration of the moving end of the rod, and the normal force

    asked by jay on October 30, 2012

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