1. Physics

    If a force of 20N stretches a spring 15 cm, by what amount will the spring stretch is if a force of 80 N is applied?

    asked by Don on November 17, 2011
  2. calculus

    I have a question about the root test. If we have 5x^5 + 2 in the denominator, then does the root(1/x) apply to the whole denominator as one, for example (5x^5 + 2)^1/x or would it be applied separately. Thanks

    asked by zuhra on April 28, 2012
  3. Water Treatment

    a) Which five quality parameters of the raw water may not meet drinking water standards? Bacterial colony count (less than 100 cfu/ml) Ammonium (less than 0.2 mg/l) Nitrite (less than 0.1 mg/l) Nitrate (less than 50 mg/l) Iron (less than 200 µg/l)

    asked by youlife2015 on October 18, 2013
  4. Water-Treatment

    a) Which five quality parameters of the raw water may not meet drinking water standards? Bacterial colony count (less than 100 cfu/ml) Ammonium (less than 0.2 mg/l) Nitrite (less than 0.1 mg/l) Nitrate (less than 50 mg/l) Iron (less than 200 µg/l)

    asked by youlifex on October 19, 2013
  5. Water Treatment

    a) Which five quality parameters of the raw water may not meet drinking water standards? Bacterial colony count (less than 100 cfu/ml) Ammonium (less than 0.2 mg/l) Nitrite (less than 0.1 mg/l) Nitrate (less than 50 mg/l) Iron (less than 200 µg/l)

    asked by youlifex on October 20, 2013
  6. ALGEBRA-MAT117

    Trains A & B are traveling if the same direction on parallel tracks. Train A is traveling at 100 miles an hour and Train B is traveling at 110 mph . Train A passes a station at 1:15 pm If Train B passes the same station at 1:45 pm what time will Train B

    asked by shauna on April 30, 2009
  7. Astronomy

    For this question assume the moon is 110 of its diameter away from the Earth. The largest apparent size of Mercury that we ever see in the sky is 1/150 the apparent diameter of the Moon. The diameter of Mercury is about 4900 km. What is the closest that

    asked by Elisabeth on August 27, 2013
  8. biology

    For each of these restriction enzymes, determine whether or not the enzyme would cut the normal, Mutant A, Mutant B, or Mutant C DNA sequences described in part (g) and select your answers in the table below:

    asked by lily on May 15, 2013
  9. engineering mechanics

    a 75kg person is standing on a board inclined at 30 angle type the horizontal .what are the magnitudes of gravitational components normal to the board and parallel to the board

    asked by Chandra kiran on July 26, 2016
  10. Math (money)

    HIII!!! I NEED HELP ON MATH! PLEASE HELP! Melissa has spent $17 so far on gifts. The additional amount she will spend will be more than $8. What are the possible total amount she will spent? Use c for the total amount (in dollars) she will spend.

    asked by Fei on July 9, 2016
  11. Math

    The school's total attendance is 449, there are 81 present in math class, what percent of the total attendance is the attendance in the math class (to the nearest tenth)?

    asked by Shawna Lynn on April 29, 2013
  12. science

    'Copper' pennies actually contain very little copper. If a penny contains 91.768 % of its total volume zinc and 8.232 % of its total volume copper, what is its density? (d of Cu = 8.95 g/cm3; d of Zn = 7.14 g/cm3.)

    asked by Arthur on August 18, 2009
  13. MATH

    You wish to mentally estimate the total cost of items that have the following prices: $1.85, $.98, $3.49, $9.78, and $6.18. Rounding off the items to the nearest half-dollar, your estimate of the total cost of these items is A. $22.50. B. $22.30. C.

    asked by Sara on August 18, 2012
  14. Jr. High Pressure Challenge Question

    A small flask has a mass of 22.71 g. When it is filled with water the total mass is 153.38 g. When it is filled with milk the total mass is 157.67 g. What is the density of milk?

    asked by Anonymous on December 26, 2010
  15. Math

    About what percent of the total population believed saying 136,800,000 to be true? Total population: 250,000,000? Answer is 55% how did you get this percent?

    asked by Dwayne on September 6, 2011
  16. MATH/ CALCULUS PIPELINE

    A common problem encountered by the oil industry is to determine the most cost-effective route to connect various wells in an oil fertile area. The attached map is a copy of a section of a U.S. Geographical Survey contour map with a wetland area outlined.

    asked by miley on March 31, 2010
  17. Trig

    A 60 ft. antenna stands on top of a building, From a point on the ground, the angles of elevation to the top and bottom of the antenna measure 58 and 44 respectively. How tall is the building

    asked by John on April 5, 2011
  18. physics

    A particles has a mass of 0.5 kg and a velocity of 734 m/s along the x axis when a force of 21 N along the y axis acts on the particle at right angles to the velocity. The acceleration of the particle is ____ m/s2

    asked by Anonymous on September 21, 2010
  19. Physics

    Vector A is described as having magnitude -7 and angle 30degress. Which is an equivaent statement of magnitude and angle of vector A? (Note: All angles are measured counterclockwise from x-axis.)

    asked by Eaden on April 15, 2013
  20. math Question

    classify the triangle by its angles and its sides. Explain how you knew which classifications to use. top of the triangle is 70 degrees, bottom right is 45 degrees and bottom left is 65.

    asked by Anonymous on March 3, 2018
  21. geometry

    the measure of an angle of a parallelogram is 12 degrees less than 3 times the measure of an adjacent angle. explain how to find the measures of all the interior angles of the parallelogram.

    asked by sab on March 7, 2011
  22. MATH

    Your original purchase price was $825.00 plus 7% sales tax. You enter into an agreement where the interest (12.5% APR) is waived for the first 12 months provided you make the required monthly payments; otherwise the interest is accrued from the date of

    asked by Sandra on May 8, 2015
  23. Math

    1. Lucita works at a fitness center and earns $5.50. per hour. She worked 3 hours on Friday and x hours on Saturday. Write an expression to represent her total wages earned. 5.50(3)+5.50x 2. You and your friend spend a total of $15 on lunch. Your friend's

    asked by Jerald on December 4, 2013
  24. algebra

    if a vendor charges p dollars each for rugby shirts, then he expects to sell 2000-100p shirts at a tournament. 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

    asked by Anonymous on February 25, 2011
  25. physics

    A projectile is fired with an initial speed of 65.2 m/s at an angle of 34.5 degree above the horizontal on a long flat firing range. Determine (a) The maximum height reached by the projectile, (b) The total time in the air, (c) The total horizontal

    asked by Anonymous on August 4, 2014
  26. Math help needed .???

    I really need help in answering the steps and the answer to this question? In a recent year, North Carolina produced 1,300,000,000 pounds of turkey. This was 18.6% of the U.S. total in that year. Calculate the U. S. total turkey production for that year.

    asked by Lisa on December 8, 2008
  27. physics 2

    A charge, q1, of +4.4 micro-coulombs and another unknown charge, q2, are surrounded by a surface. The total flux through the surface is -9.2 x 106 (N m2)/C. These charges are now placed on the x axis. q1 is placed at x = 0, and q2 is placed at x = +114.51

    asked by Jessica on January 25, 2013
  28. physics

    A body pulled by a constant force accelerates from 10 cm/s to 35 cm/s in 3.5 s. A second force accelerates the same body from rest to 110 cm/s in 10.5 s. If the first force is known to be 5.0 N, that what is the second force?

    asked by seB on February 5, 2011
  29. math

    Used books are being sold at $5 and used videos are being sold at $6. There are 175 total items sold and a total of $910 collected. How many videos were sold?

    asked by Rani on February 6, 2012
  30. chemistry

    If 4.00 g of metal is plated in the voltaic cell (which contains Ag and Ni with the total potential of 2.98 V) , how much metal is plated in the electrolytic cell (contains Ag and Zn with the total of 1.98 V)? I have no idea how to do this! Help?

    asked by Keisha on March 7, 2012
  31. World History Answer Check (Ms. Sue)

    What was the effect of total war on ordinary citizens? A: Because of total war, ordinary citizens underwent rationing of goods.

    asked by Victoria on November 5, 2014
  32. Chemistry

    If 4.00 g of metal is plated in the voltaic cell (which contains Ag and Ni with the total potential of 2.98 V) , how much metal is plated in the electrolytic cell (contains Ag and Zn with the total of 1.98 V)? I have no idea how to do this! Help?

    asked by Keisha on March 7, 2012
  33. Maths

    Raman has some ducks and sheep they total number is 26 when he counted their legs the total was 72 find the number of ducks and sheep

    asked by Tharsha on August 7, 2018
  34. Science

    Suppose the total momentum of two masses before a collision is 100 kg m/s. What is the total momentum of the two masses after they collide? A. 0 kg m/s B. 50 kg m/s C. 100 kg m/s D. 200 kg m/s

    asked by Henery on March 6, 2015
  35. CHEMISTRY! Help?

    If 4.00 g of metal is plated in the voltaic cell (which contains Ag and Ni with the total potential of 2.98 V) , how much metal is plated in the electrolytic cell (contains Ag and Zn with the total of 1.98 V)? I have no idea how to do this! Help?

    asked by Keisha on March 7, 2012
  36. Algebra

    You and 3 of your friends went to a zoo with a coupon for $10 off the total price of your tickets. If you paid a total of $17 for 4 tickets, how much would you (individually) have paid without the coupon?

    asked by Samantha on July 1, 2015
  37. math

    The production of rice in the year 2001 was 1000 tonnes which was 25% of the total food grain production in that year. In the next year if the production of rice decreased by 4% and production of rice as a percentage of total food grain production

    asked by vipul on June 28, 2016
  38. math

    The production of rice in the year 2001 was 1000 tonnes which was 25% of the total food grain production in that year. In the next year if the production of rice decreased by 4% and production of rice as a percentage of total food grain production

    asked by vipul on June 27, 2016
  39. strouds burg high school

    write a program that would prompt the user to enter an indefinite number of sales per day. display the total and average sales and display if the total sales is lower than $500 display "no profit" other display "profit was made

    asked by kevin perez on February 24, 2016
  40. Math

    A plumber makes $4.50 per hour more than his apprentice. During an 8-hour day, their combined earnings total $372. How much does each make per hour? (hint: if you decide to use cents instead of dollars,then use 450 cents per hour and 37200 cents total

    asked by Lou on September 19, 2011
  41. AP Chem.

    NaCl dissociates completely in water. Therefor the total number of particles in a 1.0 m NaCl solution is no longer 6.02 X 10^23. Since a colligative property is dependent only on the total number of solute particles, what is the freezing point for 1.0 m

    asked by Heather on March 28, 2010
  42. Math

    (a) In 2000 a club has 40 members who each pay $120 annual subscription. What is the total income from subscriptions? (b) In 2001 the subscription is increased by 35% abd the membership increases to 65. (i) What is the original subscription? (ii) What is

    asked by AJ on September 27, 2010
  43. Chemistry

    For a lab experiment we have to draw the lewis structures of hydrides. 1) Carbon It asks for the formula of hydride. Total # of valence electrons and the lewis structure. Total electrons would be four. I am not sure what the formula would be or how to find

    asked by Hannah on November 16, 2011
  44. Physics

    A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can maintain a gauge pressure of 420 kPa in the output pipe. A showerhead on the second floor (7.5 m above the pump's output pipe) has 38

    asked by Angelina on April 10, 2012
  45. Physics

    A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can maintain a gauge pressure of 420 kPa in the output pipe. A showerhead on the second floor (7.5 m above the pump's output pipe) has 38

    asked by Angelina on April 10, 2012
  46. Math geometry

    1) The base angles of an isosceles triangle are (50-x)^6 and (30x-12)^6 what is the vertex angle? 2) The area of a trapezoid is 52cm^2 if it's bases are 8 cm apart find the sum of their heights 3) What is the area of a circle inscribed inside an

    asked by K on February 27, 2017
  47. English

    1. What score did you get? I got 22. 2. What is your score? It is 22. 3. How much score did you get? I got 22. 4. How many scores did you get? I got 22. (Are all grammatical and the same?) 5. Add up all the scores, and then you can get the total score.

    asked by John on August 25, 2009
  48. math

    Bill buys x items at $3 each, y items at $5 each, and z items at 6 each. If x,y,and z are each multiple of 5 and the total price of the items costing $3 and $5 is 55, which of the following could be the total price of all x +y+z items? a. 66 b. 80 c. 95 d.

    asked by reena on October 26, 2011
  49. algebra

    A bank teller has 35 bills in $5, $10, and $20 denominations. The total value from these bills is $370.The total number of $10 bills and $20 bills is 7more than the number of $5. How many bills of each denomination?

    asked by Anonymous on July 15, 2013
  50. math

    Jesse rents 2 movies and 4 video games for a total of $18.70. At the same time, Dan rents 3 movies and 2 video games for a total of $15.25. How much does their friend Sabrina need to rent a combination of one game and one movie from the same video rental

    asked by B8 on January 12, 2014
  51. Physics

    I have already solved 2 out of 3 questions: Your spaceship lands on an unknown planet. To determine the local value of g, you ask a steel-toed crew member to kick a stone, and you find that if she kicks it at 16.0 m/s at various angles, the maximum range

    asked by . on September 17, 2010
  52. Algebra

    Martin is making a candy that contains 90% milk chocolate and the rest caramels. The candy has 3 pounds of caramels. Part A: Write an equation using one variable that can be used to find the total number of pounds of milk chocolate and caramels in the

    asked by Anonymous on November 4, 2017
  53. P-Chem

    A 0.85-g sample is dissolved in 0.150 kg of bromobenzene. Determine the molar mass of the solute if the solution boils at 429.0 K at 1 atm pressure. The normal boiling point of bromobenzene is 428.1 K and the ebullioscopic constant is 6.26 K kg mol-1. A

    asked by Michelle on October 12, 2006
  54. math

    *The value of the z-score in a hypothesis test is influenced by a variety of factors. Assuming that all other variables are held constant, explain how the value of z is influenced by each of the following: a. Increasing the difference between the sample

    asked by Cekenna on June 9, 2013
  55. Chemistry

    Iodine is mainly found in water in the trioxide ion, I3 which is formed by the combination of molecular iodine, I2 and Iodide, I-, according to the equation: I2(aq) +I-(aq) I3(aq) QUESTION: how does the system in the equilibrium seem to respond to the

    asked by Annie on March 11, 2013
  56. Statistics / Math

    If a student is chosen at random, find the probability of getting someone who is a man or a non-smoker. Round your answer to three decimal places. non regular heavy total man 135 64 5 204 women 187 21 9 217 total 322 85 14 421 Answer in decimal (round to

    asked by Sam on February 26, 2008
  57. math

    Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. The angles opposite the congruent sides of an isosceles triangle are congruent. Find the value of x in the triangle. Show all your work.

    asked by f on February 22, 2019
  58. College Trigonometry

    From a point 200 yards from the foot of a building, the angle of elevation to the top of the building is 37 degrees. Find the measure of the angles of the triangle formed by the building, the ground, and the line of sight to the top of the building?

    asked by Marie on January 16, 2013
  59. trigonometry

    From the top of a hill 700 ft high an observer notes that the angles of depression of two successive markerstones on a level ground, which leads straight away from the hill are 5 degree and 15 degree respectively. Find the distance between the two

    asked by joan on January 18, 2012
  60. trig

    From the top of a hill 700 ft. high, an observer notes that the angles of depression of two successive markerstones on a level ground, which leads straight away from the hill are 5 degree and 15 degree respectively. Find the distance between the two

    asked by Grail on January 14, 2012
  61. Physics

    Find the magnitude and direction of the resultant R of the three vectors shown in figure 1.3. The vectors have the following magnitudes: A=5.0, B=7.9, and C=8.0. Express the direction of the vector sum by specifying the angle it makes with the positive

    asked by Anonymous on October 10, 2014
  62. Trigonometry

    Hello! Explain why the primary trigonometric ratios depend only on the given angle and not the size of legs and hypotenuse of a right triangle? I am not 100% sure but it is because the angles have the same value for all of the ratios? Is it also because

    asked by Lucina on January 17, 2015
  63. Economics (attempted as suggested by economyst)

    Posted by eStone on Sunday, March 29, 2009 at 5:47pm. Suppose that a firm is currently employing 30 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed

    asked by eStone on March 30, 2009
  64. Physics

    What type of spectrum is produced by a hydrogen gas when a high potential difference is applied to it? a visible spectrum emission spectrum absorption spectrum a continuous spectrum I've been all through my notes and cant figure this one out :/

    asked by Bunny on March 6, 2012
  65. physics

    A force of 100 N is applied tangentially to a disk of radius 10 cm and mass 0.5 kg. the disk is initially at rest. What is the angular acceleration of the disk? How many revolutions does the disk goes through after 10 sec. How much rotational work was done

    asked by Maa on December 4, 2010
  66. Algebra 2 Honors

    The amount of light emitted from a battery indicator bulb pulses while the battery is charging. This can be modeled by the equation y = 60+60sin[(pi/4)t] , where y is the lumens emitted from the bulb and t is the number of seconds since the beginning of a

    asked by Christine on June 6, 2010
  67. linear equation

    A financial advisor is about to build an investment portfolio for a client who has $100000 to invest. The four investments available are A,B,C, and D. Investment A will earn 4 percent and has risk of two “points” per $ 1000 invested. B earns 6 percent

    asked by Sam on February 26, 2010
  68. algebra

    The rack of weight plated at the fitness center has a total of 148 plates weighing 2.5,5,and 10 pounds each. The total weight is 500 pounds. There are ten times as many 5 pound plates as 10 pound plates. Set up a matrix equations and then solve it to

    asked by allie on December 16, 2013
  69. Calculus

    A rancher wants to make an animal pen by fencing in an area of 2500000 square feet in a rectangular field and then divide it up with 5 fences down the middle parallel to one side. The rancher wants to use the shortest total length of fencing possible. If

    asked by Lucas on April 30, 2013
  70. Math

    Post a New Question Current Questions Homework Help: Math (HELP PLEASE) Posted by Anonymous on Tuesday, September 17, 2013 at 8:37pm. Estimate the total precipitation in inches and in days for Asheville and Wichita. City: Inches: Days:

    asked by I need help on this to on September 19, 2013
  71. math

    1.find: 32 out of 110 in percentage 2.find: 41 out of 40 in percentage

    asked by Meredith Grey on March 7, 2015
  72. math

    connexus com/content/media/642756-212012-25329-PM-831257193.png 1) Name a pair of complementary angles.

    asked by Alexia Smith on February 15, 2016
  73. Physics

    I'm shown a graph with position on the y axis and time on the x axis. The question is what is the total displacement during the time interval. The position in (m) starts at 1.0 and goes to 6 and the time starts at 0-10.0 (s). The question is what is the

    asked by JulieAnne on September 6, 2010
  74. english composition

    Entertainment Most of us live in a world of stresses and strains, tedium interspersed with hassles. We struggle to pay bills and meet deadlines, all the while trying to decide on an appropriate wedding gift for Eliza and Fred. We say, “It’s a jungle

    asked by Vedrana on December 17, 2015
  75. chemistry

    If we assume that the energy-level diagrams for homonuclear diatomic molecules shown in Figure 9.42 in the textbook can be applied to heteronuclear diatomic molecules and ions, predict the bond order and magnetic behavior of CO+

    asked by johnpaynejoelgishhansjurgmaria on November 15, 2014
  76. physics

    A magnetic field is applied to the plain of a flat coil of copper wire. The time variation of the magnetic flux density is given by Bosinwt.At which of the following values of t is the magnitude of the emf induced in the coil a

    asked by Roy on September 28, 2013
  77. Physics

    Two blocks,each of mass 3.0 kg are connected by a light cord and placed on a horizontal surfabe when a horizontal force of 20 newton is applied on a block an accn of 0.50 metre per second square is produced find(a)tensiom(b)force of friction which is same

    asked by Jack on January 31, 2017
  78. physics

    Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 10 kg and m2 = 19 kg. A force of 46 N is applied to the 19 kg box. Repeat the problem for the case where the coefficient of kinetic

    asked by Anonymous on October 4, 2012
  79. Psychology

    I have to write a paper on Psychological disorders from a specific perspective. I was going to choose Cognitive-behavioral and then systematic desensitization. I have to Develop an explanation for disorders from this perspective and describe the type of

    asked by Tabitha on August 21, 2011
  80. Physics

    a hockey player accelerates a puck (m=.167 kg) from rest to a velocity of 50 m/s in 0.0121 sec. Determine the acceleration of the p7uck and the force applied by the hockey stick to the puck. Neglect resistance forces.

    asked by Anonymous on December 13, 2012
  81. Physics

    A 0.140-kg baseball traveling 39.0 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 13.0 cm. What was the average force applied by the ball on the glove? May someone please take me through this problem step by step?

    asked by Mike Joseph on June 16, 2012
  82. emgineering

    A box with a mass of 5.0 kg is placed on a flat sloping surface elevated at 40o to the horizontal. The coefficient of static friction is 0.76. It is prevented from slipping down the slope by a force applied parallel to the slope. What is the magnitude of

    asked by Anonymous on November 6, 2015
  83. physics

    In a head-on collision, a car stops in 0.30s from a speed of 30m/s . The driver has a mass of 73kg , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second?

    asked by Anonymous on October 28, 2012
  84. English

    What is meant by the subthemes: death as pervading life, time as the essence of death and self destruction, night as the environment of death, and death as the great isolator as applied to Pablo Neruda's poems, especially Residence on Earth?

    asked by john on December 16, 2012
  85. Algebra

    How to find dimensions of a field when given length of fencing and area? Hi I really appreciate your help on this. The question states that I have a field of area 650 square metres and fencing of 110 metres. I must give 3 possible sets of dimensions of the

    asked by Bernadette on March 16, 2012
  86. Math

    A company paid $110,000 for a new 18-wheeler. When it is 9 years old it will be worth $20,000. Using straight-line depreciation, the value of the trick in dollars, V, is a linear function of its age in years, n. Find the function and the value when the

    asked by Katherine on August 22, 2018
  87. MATH

    Misu Sheet, owner of the Bedspread Shop, knows his customers will pay no more than $110 for a comforter. Misu Sheet wants to advertise the comforter as "percent markup on cost." a. What is the equivalent rate of percent markup on cost compared to the 30%

    asked by Mike on February 16, 2014
  88. Statistic

    In a population of over 15,000 patients, the distribution of systolic blood pressure follows the normal curve. Investigators believe the average systolic blood pressure in the population is 120 mm. The investigators take a simple random sample of 6

    asked by Anonymous on August 24, 2013
  89. Essay direction clarification

    I am trying to prepare in my head for an essay exam that I will be having tomorrow and I would like to know how you would interpret the professors instructions - "Please prepare to answer one of the following in an essay of at least four paragraphs

    asked by Tessa on October 9, 2013
  90. Chemistry

    What is the total ionic and net ionic equation for this aqueous reaction?: Sr(OH)2(aq) + HClO2 (aq) -I wrote the molecular as: Sr(OH)2 (aq) + HClO2 (aq) ---> SrClO2 (aq) + H20 (l) -Is the Total Ionic: Sr2+ (aq) + 2OH- (aq) + H+ (aq) + 2ClO- (aq) ---> Sr2+

    asked by Les on December 12, 2016
  91. math

    an employee is paid $3600 for the first month. she is paid an additional 1% at the end of the second month, which means a total of $3636. she continues to receive a 1% raise each month for a full year. what is her total salary at the end of the year?

    asked by bob on December 17, 2014
  92. physics

    The space shuttle has a total mass of 2.0 x 10^6 kg. At liftoff, the engines exert a total thrust of 35 x 10^6 N. Calculate the shuttle's weight. Calculate the shuttle's acceleration at liftoff. If the acceleration averages 13 m/s/s over the first 10

    asked by Anonymous on October 14, 2011
  93. Math

    an employee is paid $3600 for the first month. she is paid an additional 1% at the end of the second month, which means a total of $3636. she continues to receive a 1% raise each month for a full year. what is her total salary at the end of the year?

    asked by Peter on January 23, 2017
  94. Science

    How much heat is absorbed by a persons hand if 100 grams of steam at 100°C is first converted to liquid water at 100°C and then cooled to normal body temperature?

    asked by Anonymous on July 13, 2011
  95. Physics

    Two boxes, mass 4.0 kg and 5.0 kg are set next one another on a frictionless surface. The first box is pushed with a force of 35 N. What normal forces does the second box exert on the first box during this process? (ans: 19 N) How do you do this question?

    asked by anonymous on June 17, 2012
  96. Chem 2

    Vitamin K is involved in normal blood clotting. When 1.56 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 5.23 °C. . Calculate the molar mass of vitamin K.

    asked by Bri on February 20, 2014
  97. DBU

    The mean time to complete a psychology exam is 34 minutes with a standard deviation of 8 minutes. Assume the distribution is normal. Find the probability of a student taking less than 28 minutes.

    asked by KiKi on October 28, 2012
  98. statistics

    A vertical line is drawn through a normal distribution at z = 0.50, and separates the distribution into two sections. What proportion of the distribution is in the larger section? a. 0.6915 b. 0.3085 c. 0.1915 d. 0.3830

    asked by Robbie on October 14, 2012
  99. statistics

    The lifetime of a 2 volt non- rechargeable battery has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours.What is the z- score for batteries with lifetimes of 600 hours

    asked by Gee on September 3, 2012
  100. chemistry

    # Which of the following is true for the reaction NH3(l) NH3(g) at –33°C and 1 atm pressure? (The normal boiling point for NH3 is –33°C.) Answer Question 8 answers ΔH = 0 ΔS = 0 ΔH = PΔV ΔH = ΔnRT ΔH = TΔS

    asked by Chemdum on August 2, 2010