stan

Most popular questions and responses by stan
  1. Physics

    Figure 6-24 shows an initially stationary block of mass m on a floor. A force of magnitude 0.540mg is then applied at upward angle 16 degrees. What is the magnitude of the acceleration of the block across the floor if (a)Us=.6 and Uk=.5 and (b) Us=.4 and

    asked on March 3, 2010
  2. precalculus

    A weight is attached to a spring that is oscillating up and down it takes 6 sec for the spring to complete one cycle and the distance from the highest to lowest point is 7 in what equation models the position of the weight at time t seconds. a. y = 7sin (

    asked on March 8, 2019
  3. social studies

    1. Which of the following caused people in Middle America to settle down into villages? A. The animals they were hunting died out. B. The plants they gathered were destroyed in a natural disaster. C. The transportation method they were using to hunt and

    asked on November 11, 2018
  4. geometry

    To estimate the height of a flagpole, Marci, who is 5 feet tall stands so that her lines of sight to the top and bottom of the pole form a angle. What is the height of the pole to the nearest foot?

    asked on May 13, 2013
  5. English

    What is the significance of the title of Chapter 1.VI., “Bonaparte Blenkins Makes His Nest,” in The Story of an African Farm? What are some of the key ideas, events, and character actions and interactions in the chapter? How do they relate to the

    asked on July 10, 2019
  6. Math

    Q.1)If one zero of the polynomial 3x2-kx-2 is 2 find the other zero.allso find the value of k. Q.2)If sum of the zeroes of the polynomial x2-x-k(2x-1) is 0,find the value of k Q.3)If 2 and 3 are the zeroes of the polynomial 3x2-2kx+2m find the values of k

    asked on April 24, 2010
  7. social studies

    this is my last couple of questions.. 1. Why is there a digital divide in many Central American countries? A. Residents lack access to the internet. B. There is a lack of good infrastructure. C. Air pollution is widespread.--------- D. There are a high

    asked on November 11, 2018
  8. physics

    Body A on an inclined plane weighs 102 N, and body B attatched to Body A by a rope and a frictionless, massless pulley weighs 35 N. The coefficients of friction between A and the incline are Us= .56 and Uk= .25 . Angle is 40°. Let the positive direction

    asked on February 27, 2010
  9. calculus

    A 20.0 g copper ring at 0.000°C has an inner diameter of D = 2.54000 cm. An aluminum sphere at 108.0°C has a diameter of d = 2.54508 cm. The sphere is placed on top of the ring, and the two are allowed to come to thermal equilibrium, with no heat lost to

    asked on September 1, 2010
  10. physics

    A woman is pushing a sofa at constant speed of 1.0 m/s on a horizontal surface. She exerts a horizontal force of 80 N in the direction of motion. Approximately how hard would the woman have to push to keep the sofa moving at a constant speed of 2.0 m/s?

    asked on September 28, 2010
  11. Physics- Elena please help!

    A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.420. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.650 rad/s2. (a) After

    asked on October 29, 2012
  12. physics help

    A woman is pushing a sofa at constant speed of 1.0 m/s on a horizontal surface. She exerts a horizontal force of 80 N in the direction of motion. A) how can the sofa move at constant speed without Newton's first law being violated? B)Approximately how hard

    asked on September 28, 2010
  13. physics help

    Two children are playing a game in which they try to hit a small box on the floor with a marble fired from a spring-loaded gun that is mounted on a table. The target box is horizontal distance D = 1.60 m from the edge of the table, see the figure. Bobby

    asked on March 18, 2010
  14. Thermodynamics

    100 kg of steam is enclosed in a piston-cylinder device, initially at 300°C and 5 bar. It expands and cools to 200°C and 1 bar. A) What is the change in internal energy of the steam in this process?

    asked on February 2, 2016
  15. Physics- Elena please help!

    A digital audio compact disc carries data along a continuous spiral track from the inner circumference of the disc to the outside edge. Each bit occupies 0.60 mm of the track. A CD player turns the disc to carry the track counter-clockwise above a lens at

    asked on October 29, 2012
  16. Physics

    A 200 kg block of ice at 0.0c is placed in a large lake the temperature of the lake is just slightly higher than 0 C and the ice melts very slowly. i) what is the entropy change of ice ii) What is the entropy change of the lake iii) What is the entropy

    asked on March 7, 2018
  17. Indifference Curves

    For each example below, draw a set of three indifference curves that represent the given preferences. Be certain to show the direction of increasing utility. Also write down a utility function that would be consistent with the given preferences and use

    asked on August 7, 2009
  18. physics

    what impulse occurs when an average force of 10n is exerted on a cart of 2.5 s? What change in momentumdoes the cart undergo/ If the mass of the cart is 2K and the cart is initally at rest, calculate it's final speed.

    asked on March 6, 2011
  19. Statistics

    Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the

    asked on June 24, 2010
  20. Geometry

    Given triangle KLM is CONGRUENT to triangle NOP, KL = 2y, LM= 6, KM = 8, NP = 2x-2y, and ON = X. Determine the measures of x and y. I drew out the two triangles and I know I’m gonna have to solve to get x and y but the two variables are confusing me so

    asked on March 22, 2018
  21. Chemistry

    472 mL of H2 was collected over water when 1.256g Zn reacted with excess HCl. The atmospheric pressure during the experiment was 754 mmHg and the temp was 26C. What is the pressure in atm of the dry hydrogen gas in the mixture. I don't know how to answer

    asked on June 29, 2015
  22. Statistics

    Total plasma volume is important in determining the required plasma component in blood replacement theory for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that sample of 50

    asked on June 25, 2010
  23. Chemical Engineering

    A small family home in Tucson, Arizona, has a rooftop area of 1967 square feet, and it is possible to capture rain falling on about 56% of the roof. A typical annual rainfall is about 14 inches. If the family wanted to install a tank to capture the rain

    asked on September 7, 2015
  24. Physics

    A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

    asked on November 21, 2012
  25. Accel Math

    In a dice game if you roll a 2, 4, or 6 you get the value of the die. If you roll as 1, 3, or 5 you lose $5. What is the expected value of the game?

    asked on March 29, 2012
  26. Math/Geometry

    Can you help me with this? Find the area of each regular polygon. Round to the nearest tenth. 1. an equilateral triangle with an apothem 8.9 inches long

    asked on March 3, 2010
  27. physics

    A ball is thrown straight up with an initial speed of 60 m/s. How high does it go? Assume the accelera- tion of gravity is 10 m/s22 2)How long is it in the air?

    asked on November 12, 2010
  28. calculus help please

    Find the points where the tangent line is horizontal or vertical. Find the area under one period of the curve. x= r(deta - cos deta) Y= r(1- sin deta) deta= pie/3

    asked on August 28, 2010
  29. Statistics

    Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the

    asked on June 25, 2010
  30. Statistics

    Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the

    asked on June 24, 2010
  31. chemistry

    The distance from Earth to the Moon is approximately 240,000 .What is this distance in meters? Express your answer using two significant figures.

    asked on June 9, 2011
  32. math

    Q.1)Find hcf and lcm of the following using fundamntal theorem of arithematic 12,720 and 540. Q.2)Find the greatest number which divides 418,1354 and 2146 exactly leaving remainder 10 in each case. Q.3)If product of HCF and LCM of two numbers is 5120.One

    asked on April 25, 2010
  33. math

    The area of a rectangular piece of fencing is represented by the equation w(4w+4)=3, where w is the width of fencing in yards. Find the width of the fencing.

    asked on April 26, 2012
  34. Math

    a parabola whose rootsare at A(-3,0) and B(6,0) has a y-intercept at point C(0,p),p

    asked on May 29, 2011
  35. physics help

    The magnitude of the velocity of a particle which starts from rest 2 ft below the origin when t = 0 and moves along a vertical axis is directly proportional to the time after starting. The displacement of the particle during the time interval from t = 1

    asked on January 20, 2011
  36. physics help

    The magnitude of the velocity of a particle which starts from rest 2 ft below the origin when t = 0 and moves along a vertical axis is directly proportional to the time after starting. The displacement of the particle during the time interval from t = 1

    asked on January 20, 2011
  37. Statistics

    Total plasma volume is important in determining the required plasma component in blood replacement theory for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that sample of 50

    asked on June 24, 2010
  38. Physical Science

    How do atoms react with each other to form other substances? I don't know what grade you are in but if this is not understandable, please clarify and repost. Many metals react with many non-metals with the metal losing electrons (forming a positive ion)

    asked on December 13, 2006
  39. Science

    A metal from group 1 and a nonmemtal from group 17 are A.not likely to bond B. Likely to form a covalent bond C. Likely to form a ionic bond** D. Likely to form a metalloid I think it's c am I right?

    asked on November 7, 2017
  40. Algebra 1

    (2x^3 - x^2 - 24x + 12) divided by (2x - 1)

    asked on April 10, 2012
  41. Statistics

    Total plasma volume is important in determining the required plasma component in blood replacement theory for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that sample of 50

    asked on June 24, 2010
  42. Finite Math

    Factories A and B sent rice to stores 1 and 2. A sent 10 loads and B sent 22. Store 1 used 15 loads and store 2 used 17. It cost $200 to ship from A to 1, $350 from A to 2, $300 from B to 1, and $250 from B to 2. $ 7750 was spent. How many loads went

    asked on November 4, 2008
  43. math

    Triangle ADE is proportional to Triangle ABC. The Length of DE is 20 Ft: the Length of AB is 6 ft. and the Length of BC is 8 Ft. What is the length of AD?

    asked on February 25, 2014
  44. Dynamics

    A French artillerist, Captain A. Le Duc, developed an empirical formula for the velocity of a projectile in terms of the distance traveled by the projectile in the bore. For a 155-mm gun this equation is v = 3309s /(70 + s) where s is the distance traveled

    asked on January 19, 2011
  45. math

    Why does inverse variation not hold (as x increases y decrease) when the constant of variation is negative?

    asked on May 21, 2010
  46. Geometry

    The problem is, triangle ABC is an isosceles triangle where

    asked on March 22, 2018
  47. Math Problem

    Please help, is this right. Circle the number closest in value to 8. a. 7.9 b. 8.04 _ c.8.1 (there is a line over the 1) _ d. 7.89 (there is a line over the 9) I selected b: 8.04

    asked on November 7, 2015
  48. math trigono

    1. If tanθ = –√3 , what is the value of cot ? 2. Find the value of 3sec2.4. (Round to the nearest tenth.) 7. if θ is a standard position angle and cotθ = 1.85, in which quadrant(s) could θ lie? 14.if sinθ = -4/5 and tanθ = -4/3, what is

    asked on December 12, 2012
  49. Physics

    What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m?

    asked on May 24, 2012
  50. physics

    A ball is thrown vertically upward with a speed of 23.7 m/s from a height of 2.0 m. How long does it take to reach its high- est point? The acceleration of gravity is 9.81 m/s2 2) How long does the ball take to hit the ground after it reaches its highest

    asked on November 12, 2010
  51. math

    the least common multiple of 10,24

    asked on November 3, 2009
  52. biology

    examine the intetnet structure of the leaf drawn say how the different layer are suiled for the function of photosynthes

    asked on November 3, 2009
  53. Economics

    Property Tax The Jones family earns $225,000 a year. What % is the property tax of their income? 0.44% 1% 4.4% 0.1% Can anyone please explain me how to do this question? I wasn't given a % amount or anything...

    asked on September 22, 2009
  54. math

    -7(4x+2)+5x=170

    asked on November 10, 2012
  55. physics

    a wheel revolves about a fixed horizontal axis through O (the center). During a certain interval of time, the angular velocity (which initially is 20 rad per second clockwise) changes uniformly at such a rate that the angular displacement is 60 rad

    asked on January 31, 2011
  56. physics

    a wheel revolves about a fixed horizontal axis through O. During a certain interval of time, the angular velocity (which initially is 20 rad per second clockwise) changes uniformly at such a rate that the angular displacement is 60 rad counterclockwise,

    asked on January 31, 2011
  57. calculus

    Find a Cartesian equation for r= 3sin deta

    asked on August 31, 2010
  58. Biology

    What effect does cooking have on each of the following: a) starch b) cellulose c) butter d) sunflower oil e) liquid protein.

    asked on November 3, 2009
  59. biology

    Give four reasons why we need food.

    asked on November 3, 2009
  60. science

    Describe the identifiable physical properties of substances and explain how changes in these properties can occur without changing the chemical nature of the substance. Mass & density are 2 properties of matter. When water freezes it expands making it less

    asked on December 14, 2006
  61. MATH

    Nina is 4 years older than Sam. Next year Nina is 3 years older. How old are they?

    asked on March 8, 2016
  62. sociology 120

    Justice Potter Stewart would most agree with which claim about obscenity? (Points : 1) It is easy to concretely determine what obscenity is. People can intuitively understand what obscenity is. Obscenity ought to be allowed so long as no one is harmed.

    asked on March 1, 2015
  63. calculus

    find the absolute maximum and minimum of sqrt 3 x^2/36 + (1-x)^2/32

    asked on June 8, 2013
  64. social work writing

    What is the parallel structure of this sentence? To install new carpeting, workers must first remove the old carpet, prepare the surface, and then lay down the matting

    asked on January 23, 2013
  65. statistics

    5. A professor teaching introductory psychology gave the grades that follow. According to the normal curve, she should have given about 4% A’s, 14% B’s, 64% C’s, 14% D’s, and 4% F’s. Do a Chi-Square to determine if the actual grade assignment

    asked on December 12, 2012
  66. Physics

    Two resistors of equal resistance are connected in series with each other and are connected to a battery that produces a potential difference of 8 V. If the current is 0.2 A what is the value of each resistance?

    asked on November 29, 2012
  67. math

    What is the value to 2 decimal places of the following integral when a = 24, b = 56, c = 2 and d = 59?

    asked on August 10, 2012
  68. Economis

    Name some goods that were at one time free goods are now economic goods?

    asked on July 10, 2011
  69. physics

    The position of a point moving on a circular path is given by the equation s= 2t^3 + 6t^2 where s and t are measured in feet and seconds, respectively. The magnitude of the acceleration of the point is 60 fps2 when t = 2 sec. Determine the radius of the

    asked on January 28, 2011
  70. business math

    how can a bondholder can estimate the effective interest rate return on the total cost of the investment, including commissions.

    asked on November 6, 2010
  71. chemistry

    how much water (in mL's) needs to be added to 330 mL's of a 3.33 molar solution of lithium bromide to make the solution 1.44 molar

    asked on October 13, 2010
  72. calculus help

    Find the points where the tangent line is horizontal or vertical. Find the area under one period of the curve. x= r(deta - cos deta) Y= r(1- sin deta)

    asked on August 26, 2010
  73. Calculus II

    integral of 1/((x^2+1)^2) dx

    asked on April 23, 2010
  74. biology

    IN THE EPIDEMIS WHAT THREE THING CAN PASS THOUGH THIS OPENING

    asked on November 3, 2009
  75. biology

    the guared cell produce an opening called a stom

    asked on November 3, 2009
  76. biology

    mesaphyll layer palisade and spongy

    asked on November 3, 2009
  77. Biology

    In what kind of food is each of the following substances found: a)lactose b)sucrose c)cellulose d)sunflower oil e)liquid protein.

    asked on November 3, 2009
  1. math;)

    Is it c&e? cuz that's what I think it is

    posted on March 23, 2019
  2. social studies

    Sorry Ms.Sue but this is my first post, i think you had mistaken me for the wrong person but..thank you so much

    posted on November 11, 2018
  3. Geometry

    Thanks

    posted on March 22, 2018
  4. Geometry

    Alright so would x=8 and y=4

    posted on March 22, 2018
  5. English

    Kaanila

    posted on March 7, 2018
  6. math

    21.68 ft

    posted on January 13, 2018
  7. 6th Grade Math

    i.d.k. i.d.k.

    posted on March 8, 2017
  8. MATH

    That what I thought. Thank you.

    posted on March 8, 2016
  9. math

    It would be 8 for science.

    posted on February 3, 2016
  10. Math Problem

    Thanks for checking Ms.Sue

    posted on November 7, 2015
  11. math

    what an assumption - perhaps evan has 2 siblings that each lost a leg in war then (6 x 2) + (2 x 1] = 12 and 6 + 2=8

    posted on September 4, 2015
  12. math

    China 1% ethiopia 1%

    posted on November 27, 2014
  13. Physics

    I was able to figure out where I went wrong with this question. This question can be ignored.

    posted on May 24, 2012
  14. physics help

    yeah that is word for word

    posted on January 20, 2011
  15. Physics

    Why is The average velocity after pushing V = 2*(16.3m/2.3s) Where did u get the 2 from?

    posted on September 29, 2009
  16. Economics

    I don't know, I wasn't given a property tax...unless there's an official tax % for a certain amount of income....

    posted on September 22, 2009
  17. Social Studies

    what are some famous climbing expeditors of the Andes Mountains and their dates

    posted on January 11, 2009