sasha

Most popular questions and responses by sasha
  1. Social Studies

    What was the purpose of washington’s neutrality proclamation?

    asked on November 9, 2017
  2. graphing help?

    Graph ​ g(t)=4sin(3t)+2 ​. Use 3.14 for π . Use the sine tool to graph the function. The first point must be on the midline and the second point must be a maximum or minimum value on the graph closest to the first point. How would I graph this? I have

    asked on May 4, 2017
  3. Physics

    A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 800 N and the angle between the two ropes is 20°. How hard must each player pull to drag the

    asked on November 19, 2009
  4. PHYSICS

    a child sitting 1.10 m from the center of a merry go round moves with a speed of 1.25 m/s. calculate the centripetal acceleration of the child and the net horizontal force exerted on the child (mass = 25 kg).

    asked on November 3, 2009
  5. Physics

    a 75-kg petty theif wants to escape from a third story window. unfortunately a makeshift rope of sheets tied together can support a mass of only 58 kg. how might the theif use this rope? give a quantitative answer.

    asked on October 24, 2009
  6. Physics

    Coulomb measured the deflection of sphere A when spheres A and B had equal charges and were a distance d apart. He then made the charge on B one-third the charge on A. How far apart would the two spheres then have had to be for A to have had the same

    asked on March 29, 2010
  7. science

    1) How do decomposers increase the fertility of soil? A) By storing moisture in the soil. B) By breaking down and digesting the remains of dead organisms. C) By making spaces for air and water. D) By burrowing deep below topsoil. I am thinking is is either

    asked on March 23, 2015
  8. chemistry -check over work

    Naphthalene (C10H8)is a solid aromatic compound often sold as mothballs.The complete combustion of this substance to yield CO2(g)and H2O(l)at 25 ْC yields -5154 kJ/mol. A. write balanced equation for the combustion of C10H8. C10H8+12O2->10CO2+4H2O ΔH

    asked on April 14, 2008
  9. Math

    1) Which expression represents the perimeter of the triangle drawn below? The triangle has (x-1) on the left side. (x+2) is on the bottom of the triangle. (2x-4) is on the slanted top. A) 3x-3 B) 3x-5 C) 4x-3 D) 4x-5 I do not know how to do this, so help

    asked on April 29, 2015
  10. physics

    a .45kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.3m on a frictionless horizontal surface. if the cord will break when the tension in it exceeds 75 N, what is the maximum speed the ball can have?

    asked on November 3, 2009
  11. health

    Positive energy balance is important when A. weight loss is desired. B. you're stressed. C. weight stability is desired. D. a child is growing is it c ?

    asked on June 8, 2016
  12. Organic Chemistry

    I have already calculated the volume of ethyl alcohol need to dissolve 0.300 g of sulfanilamide at 78 degrees Celsius. I got 1.429 mL ethyl alcohol. My question is: how do I calculate how many grams of sulfanilamide will remain dissolved in the mother

    asked on September 14, 2015
  13. Physics

    A 3800 kg open railroad car coasts along with a constant speed of 8.60 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 3.50 kg/min. ignoring friction with the tracks what is the speed of the car after 90.0 minutes?

    asked on November 11, 2009
  14. math

    K is the midpoint of JL JL=4x-2 and JK=7. find x, KL, and JL. Very confused , can you please show steps to working out the problem

    asked on August 25, 2013
  15. physics

    A sports car of mass 950kg (including the driver) crosses the rounded top of a hill (radius = 95m) at 22m/s. Determine a) the normal force exerted by the road on the car, b) the normal force exerted by the car on the 72kg driver, and c) the car speed at

    asked on November 3, 2009
  16. physics

    A yo-yo is made of two solid cylindrical disks, each of mass 0.053 kg and diameter 0.073 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0052 kg and diameter 0.012 m. Use conservation of energy to calculate the linear speed of the yo-yo

    asked on November 29, 2010
  17. physics

    a 145g baseball is dropped from a tree 13.0m above the ground. with what is the velocity of the baseball at the ground after it falls 13.0m? B. If it actually hits the ground with a speed of 8.0o m/s, what is the average force of air resistance exerted on

    asked on November 12, 2009
  18. Math (check answers)

    1)Identify the sampling method. You want to determine the number of text messages students at your school send in a month. You go to the cafeteria and randomly ask students as they come out of the lunch line. A)Random*** B)Systematic C)Stratified D)None of

    asked on June 1, 2015
  19. math

    A ladder 10 ft long rests against a vertical wall. let θ be the angle between the top of the ladder and the wall and let x be the distance from the bottom of the ladder to the wall. If the bottom of the ladder slides away from the wall, how fast does x

    asked on October 7, 2010
  20. Organic Chemistry

    Simple Distillation: What is the molar composition of the vapor in equilibrium with a boiling liquid that has a composition of 60% A and 40% B? I know that the vapor should be richer in the lower-boiling substance, which is A in this case. And: If a sample

    asked on October 9, 2015
  21. Algebra

    If 18g of a radioactive substance are present initially and 8 yr later only 9 g remain, how much of the substance will be present after 20 yr?

    asked on September 22, 2015
  22. earth science

    Compare the formation processes of igneous, sedimentary, and metamorphic rocks. In general, which process can be the most direct, requiring the fewest number of steps? Which can be the most complex? I am guessing igneous rocks are the easiest because the

    asked on October 21, 2016
  23. math

    1. The world population in 1992 is 5.42 billion. If its population doubled every a. 41 years, what would its population be in 41 years? b. 41 years, what would its population be in 82 years? c. 82 years, what would its population be in 164 years?

    asked on November 12, 2013
  24. physics

    21.7 kg child descends a slide 3.5 m high and reaches the bottom with a speed of 2.2 m/s How many joules of thermal energy are created due to friction as a kid slides down a slide?

    asked on November 12, 2009
  25. math

    A leak in a water tank causes the water level to decrease by 3.6×10^−2 millimeters each second. About how many millimeters does the water level in the tank decrease in 5 hours, or 1.8×10^4 seconds? express the answer in scientific notation.

    asked on April 9, 2018
  26. algebra 2

    A rubber ball is thrown 20 feet into the air. If it rebounds 3/5 of the height, how far will it have traveled after the fifth bounce?

    asked on May 10, 2013
  27. statistic

    A survey of drivers in the United States found that 15% never use a cell phone while driving. Suppose that drivers arrive at random at an auto inspection station. a. If the inspector checks 10 drivers, what is the probability that at least one driver never

    asked on January 5, 2013
  28. Math

    A basketball player made 63 out of 100 attempted free throws.What percent of free throws did the player make

    asked on March 7, 2017
  29. English/Grammar

    Hello - I am having trouble with verbs and linking verbs...can you tell me if these are correct? I also have to pick out the predicate noun/adjective. 1. In northern Canada, the countryside seems peaceful. (LV= seems, PA = peaceful) 2. The mountain air

    asked on November 2, 2010
  30. Organic Chemistry

    Why is methylene chloride (dichloromethane) used to extract eugenol from cloves, and not toluene?

    asked on October 19, 2015
  31. calculus

    A ladder 10 ft long rests against a vertical wall. let θ be the angle between the top of the ladder and the wall and let x be the distance from the bottom of the ladder to the wall. If the bottom of the ladder slides away from the wall, how fast does x

    asked on October 7, 2010
  32. Math (check answers)

    Since the opening night, attendance at Play A has increased steadily, while attendance at Play B first rose and then fell. Equations modeling the daily attendance y at each play are shown below, where x is the number of days since the opening night. On

    asked on June 1, 2015
  33. Math (check answers)

    1)What is the simplified form of the expression? 5d^6*d^-12? A)5d^-72 B)6d^-72 C)5d^-6**** D)6d^-6 I think that the answer is C. If anyone could tell me if I am correct that would be great.

    asked on June 1, 2015
  34. Math

    you mix 2/5 cup of red paint for every 1/4 cup of blue paint to makw 1 5/8 gallons of purple paint. how much red paint and blue paint do u use

    asked on October 24, 2017
  35. Math *corrected myself*

    he table shows the population of a school for the years 1992-2008. Year: 1992, 1994 1996, 1998, 2000, 2002, 2004, 2006, 2008 Population: 628, 656, 692,751, 793, 840 ,868, 902, 940 Which is the best prediction for the population in 2012? 1500 1100< or 1500

    asked on October 21, 2016
  36. Science

    Water on Earth is either freshwater or saltwater. What is the percent ratio of freshwater to percent saltwater on Earth? A) 1% freshwater : 99% saltwater B) 3% freshwater : 97% saltwater C) 30% freshwater : 70% saltwater D) 50% freshwater : 50% saltwater I

    asked on March 30, 2017
  37. chemistry

    What is w when 3.37 kg of H2O(l), initially at 25.0oC, is converted into water vapour at 111oC against a constant external pressure of 1.00 atm? Assume that the vapour behaves ideally and that the density of liquid water is 1.00 g/mL. (Remember to include

    asked on November 3, 2014
  38. Physics

    A bush baby, an African primate, is capable of leaping vertically to the remarkable height of 2.3 m. To jump this high, the bush baby accelerates over a distance of 0.16 m while extending the legs. The acceleration during the jump is approximately

    asked on February 19, 2011
  39. Physics

    A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 800 N and the angle between the two ropes is 20°. How hard must each player pull to drag the

    asked on November 20, 2009
  40. physics

    the first excited state of the nucleus of uranium-235 is 0.051 MeV above the ground state. what is the wavelength of the photon emitted when the nucleus makes a transition to the ground state? (in meters)

    asked on February 27, 2010
  41. physics

    When will your apparent weight be greatest, as measured by a a scale in a moving elevator; when the elevators: (a) accel. downward (b) accel. upward (c) is in free fall (d) moves upward at a constant speed? In what case would you weight be the least? When

    asked on October 26, 2009
  42. Physics

    You drop a ball from a height of 2.0 m and it bounces back to a height of 1.5 m (a) What fraction of its initial energy is lost during the bounce? (b) What is the ball’s speed just at it leaves the ground after the bounce?

    asked on August 15, 2010
  43. Physics

    I found the first three parts of the question but I can't figure out part d. The instruments attached to a weather balloon in the figure below have a mass(m) of 5.5 kg. The balloon is released and exerts an upward force(F) of 109 N on the instruments. (a)

    asked on January 3, 2010
  44. physics

    A boy throws a rock with an initial velocity of 2.47 m/s at 30.0 degrees above the horizontal. How long does it take for the rock to reach the maximum height of its trajectory?

    asked on March 7, 2010
  45. physics

    calculate the force of Earth's gravity on a spacecraft 12,800 km (2 Earth radii) above Earth's surface if its mass is 1350 kg. i know the universal gravitation formula is Fg = G [(m1 m2)/ r^2] but im not getting anywhere near the multiply choice answers

    asked on October 26, 2009
  46. chemistry

    what is the % (m/m) of Mg(NO3)2 in solution when 0.84 g of Mg(NO3)2 are dissolved in enough deionized water to prepare 500.0 ml of solution ( assume the solution in dilute enough that the density of the solution is 1.0 g/ml)

    asked on April 5, 2017
  47. alGEBRA 1

    the ratio of lemon juice to water in lemonade is 3:7 ,. if 9 cups of water aer used to make a pitcher of lemonade , how many cups of lemon juice are needed

    asked on September 12, 2015
  48. Statistics

    Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers). a. If you have a body temperature of 99.00 °F, what is your

    asked on April 19, 2010
  49. Math

    How many real number solutions does the equation have? y=3x^2-5x-5 A)one solution B)two solutions C)no solutions D)infinitely many solutions I can't figure this question out. Any help would be amazing.

    asked on June 1, 2015
  50. math

    The area covered by water lilies in a pond you own doubles in size every day. If allowed to grow the plants would cover the entire pond surface in 30 days. You had decided to do nothing until the pond is ½ covered. a. On what day will the pond be ½

    asked on November 12, 2013
  51. calculus optimization problem

    by cutting away identical squares from each corner of a rectangular piece of cardboard and folding up the resulting flaps, an open box may be made. if the cardboard is 30 inches long and 14 inches wide find the dimensions of the box that will yield the

    asked on April 3, 2013
  52. Physics

    A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 800 N and the angle between the two ropes is 20°. How hard must each player pull to drag the

    asked on November 20, 2009
  53. Math

    To find the weight of the gold in a 22 karat gold object, multiply the object's weight by 0.917. To find the weight of gold in a 14 karat gold object, multiply the object's weight by 0.583. Part 1 Which contains more gold, a 22 karat gold object or a 14

    asked on October 23, 2017
  54. Psychology Stats and Research

    Although there is a popular belief that herbal remedies such as Ginkgo biloba and Ginseng may improve learning and memory in healthy adults, these effects are usually not supported by well-controlled research (Persson, Bringlov, Nilsson, and Nyberg, 2004).

    asked on May 2, 2017
  55. Math (PLEASE HELP!)

    The temperature of an enclosure for a pet snake should be about 27°C, give or take 3°C. (show your work) a) What absolute value expression can be used to represent this situation? b) Use the expression to determine the temperature range the enclosure

    asked on June 6, 2015
  56. Principles of Business

    The term 'human resources' refers to: (A)persons available for productive and professional services (B)raw materials used in the manufacture of goods (C)materials and goods made by human beings (D)capital invested by shareholders in company

    asked on April 3, 2011
  57. calculus

    a spotlight on the ground shines on a wall 12 m away. if a man 2m tall walks from the spotlight toward the building at a speed of 1.6m/s, how fast is the length of his shadow on the building decreasing when he is 4m from the building?

    asked on October 14, 2010
  58. physics

    two identical point charges are fixed to diagonally opposite corners of a square that is .5m on a side. Ecah charge is +3.0x10^-6 C. How much work is done by the elctric force as one of the charges moves to an empty corner

    asked on January 19, 2011
  59. algebra

    use the integer to represent a withdrawal of $125 from a bank account. ( i need help )

    asked on September 5, 2010
  60. General Chemistry

    A solution of 2.50g of compound having the empirical formula C6H5P in 25.0g of benzene is observed to freeze at 4.3 degrees Celsius. Calculate the molar mass of the solute and its molecular formula.

    asked on September 4, 2011
  61. physics

    You walk 80 m to the north, then turn 60 degrees to your right and walk another 45 m. Determine the direction of your displacement vector. Express answer relative to east :)

    asked on March 7, 2010
  62. Physics

    Astronauts who spend long periods in outer space could be adversely affected by weightlessness. One way to simulate gravity is to shape the spaceship like a cylindrical shell that rotates, with the astronauts walking on the inside surface. Explain how this

    asked on November 1, 2009
  63. math

    m∠2 + m∠3 + m∠4 = 180°/ reason: Given? m∠1 + m∠2 = 180°/reason: Supplementary Angle definition m∠1 + m∠2 = m∠2 + m∠3 + m∠4/reason: Substitution property equality m∠1 + m∠2 - m∠2 = m∠2 + m∠3 + m∠4 -m∠2/reason= Subtraction

    asked on October 24, 2016
  64. College Algebra

    A rectangular enclosure is to be constructed with 2,000 feet of fence in order to have four sections, as in the diagram below. What should be the dimensions in order to maximize the area enclosed? What is the maximum area? (So the diagram is just four

    asked on April 27, 2015
  65. college

    How fast (in rpm) must a centrifuge rotate if a particle 8.2 cm from the axis of rotation is to experience an acceleration of 200000 g 's?

    asked on October 29, 2010
  66. Physics

    Two charged bodies exert a force of 0.415 N on each other. If they are moved so that they are one-third as far apart, what force is exerted?

    asked on March 29, 2010
  67. Physics

    Suppose a 68-kg boy and a 40-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s^2, find the magnitude of the acceleration of the boy toward the girl.

    asked on January 3, 2010
  68. math

    Mary wants to build a fence in the yard to keep her dog from running away. She only has 60 feet of fencing. If she wants to create a rectangular space that has a length that is twice as long as the width. How long is each side of the rectangular space?

    asked on May 17, 2015
  69. Math

    Hi! I know I am asking a lot since this is a huge question, but I was wondering if anyone could help or walk me through it. I totally understand if you do not want to help. But I am really confused and any help at all would be amazing. Thank you! You are

    asked on May 14, 2015
  70. Re post water in tanks problem

    A./_\ B.\_/ C.|_| The three tanks shown above are filled with water to an equal depth. All the tanks have an equal height. Tank A has the greatest surface area at the bottom, tank B the least and tank C the middle. (Select T-True, F-False, G-Greater than,

    asked on March 5, 2012
  71. physics

    Highway safety engineers build soft barriers such as the one shown in Figure 3-21, so that cars hitting them will slow down at a safe rate. A person wearing a safety belt can withstand an acceleration of -3.0 102 m/s2. How thick should barriers be to

    asked on October 27, 2009
  72. math

    Edna and Nancy leave the house of a common friend at the same time and walk for 4 hours. Edna walks due east at the average rate of 4 kilometers per hour and Nancy walks due north at the average rate of 3 kilometers per hour. What is the straight-line

    asked on October 27, 2008
  73. PHYSICS

    A long solenoid that has 1200 turns uniformly distributed over a length of 0.37 m is required to produce a magnetic field of magnitude 0.02mT at its center. what voltage should be applied across the solenoid if it has a resistance of 20ohms? can someone

    asked on March 28, 2018
  74. Physics Honors

    A basketball player makes a jump shot. The 0.600-kg ball is released at a height of 1.90 m above the floor with a speed of 7.40 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.40 m/s. What is the work done on the ball by air

    asked on February 13, 2015
  75. Please help childcare

    i need to find 5 books that support development of gender identity by portraying males and females in diverse roles. but it has to be from 2005 till 2010 I found 1 but i cant seem to find more?

    asked on December 8, 2010
  76. calculus

    prove that the function f(x) = (x^101)+(x^51)+x+1 has neither a local maximum nor a local minimum

    asked on October 28, 2010
  77. Math

    How many ways can 3 students be arranged in three chairs? I'm not really sure but I think that the answer will be 9 (nine), is that correct..?

    asked on January 15, 2010
  78. Physics

    A charge Q = -610 NC (-6.1 × 10^-7 C) is uniformly distributed on a ring of 2.4-m radius. A point charge q = +480 nC (+4.8 × 10^-7 C) is fixed at the center of the ring, as shown in the figure. An electron is projected from infinity toward the ring along

    asked on May 7, 2018
  79. Physics

    An elevator cable breaks when a 950 kg elevator is 23 m above a huge spring (k = 2.3×105 N/m) at the bottom of the shaft. (a)Calculate the work done by gravity on the elevator before it hits the spring. (b) Calculate the speed of the elevator just before

    asked on November 17, 2010
  80. Physics

    Suppose a 68-kg boy and a 40-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.

    asked on January 5, 2010
  81. music

    what is an element in music There are a number of musical elements: rhythm, melody, dynamics, harmony, tempo, timbre, articulation, texture and form. You can find definitions for these by clicking on MUSIC under SUBJECTS on the left side of your screen,

    asked on September 26, 2006
  82. Trig

    Find three additional polar representation of the point (-3, pie over 6) given in polar coordinates,using -2 pie

    asked on May 20, 2010
  83. Math 20

    Rebels launch a cannonball from a 58.8ft tall cliff toward their enemy's ship. The cannonball travels 19.6ft per second (ft/s). The equation for the cannonball's height, h, at time, t, after launch is h(t) = -4.9t^2 + 19.6t + 58.8, where h is in feet and t

    asked on September 27, 2018
  84. Math

    The temperature of an enclosure for a pet snake should be about 27°C, give or take 3°C. (show your work) a) What absolute value expression can be used to represent this situation? b) Use the expression to determine the temperature range the enclosure

    asked on June 6, 2015
  85. math

    if $6000 is invested at 3% compounded quarterly, what is the amount after 6yrs?

    asked on April 28, 2015
  86. Early Childhood Education

    When designing IFSP objectives, its useful to parents to think of skills that a. are short and easy. b. fit into natural daily routines. c. are most useful in promoting ambulation. d. are taught in isolation to maximize chances of progress.

    asked on November 16, 2013
  87. Early Childhood Education

    Which of the following should not account for rapid gain in overall brain size after birth. a. number of neurons b.swelling due to rapid muscle growth c. The growth of dendrite trees d. myelinization I chose answer a.

    asked on September 21, 2013
  88. calculus

    let f(x)= 2 - |2x-1|. Show that there is no value of c such that f(3)- f(0) = f'(c)(3-0). Why does this not contradict the mean value theorem.

    asked on November 7, 2010
  89. Calculus

    A poster is to have an area of 170 in2 with 2 inch margins at the bottom and sides and a 3 inch margin at the top. What dimensions will give the largest printed area? (Give your answers correct to one decimal place.)

    asked on March 1, 2010
  90. world geography

    What major cultural feature is common throughout the region? What other cultural features could you use to further divide the Persian Gulf and interior Southwest Asia into more regions?

    asked on September 29, 2015
  91. First Nations Studies 12

    Activity Sheet 5-10. Analysis: Louis Riel's summation to the Jury speech. Please someone help me with these questions if you can please!! I REALLY NEED THE HELP!!!??? What information is left out of his speech? What other sources of information could you

    asked on May 25, 2015
  92. College Algebra

    A large hotel finds that it can rent 95 rooms when it charge $100 per room. For each $1 increase in room cost it rents one room less. (Likewise, for each $1 decrease in room cost it rents one room more) What price should it charge in order to maximize the

    asked on April 27, 2015
  93. chemistry

    A 0.009298-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.7oC to 27.1oC. If the heat capacity of the calorimeter is 4.84 kJ (oC)-1, then what is the constant volume heat of

    asked on November 3, 2014
  94. Physics

    A./_\ B.\_/ C.|_| The three tanks shown above are filled with water to an equal depth. All the tanks have an equal height. Tank A has the greatest surface area at the bottom, tank B the least and tank C the middle. (Select T-True, F-False, G-Greater than,

    asked on March 4, 2012
  95. Modern History

    Hi I need help finding where this cartoon was originally published Its the LEV HAAS (Czech,1901-1983 "Do not trust him! The kulak is the most hardened enemy of socialism") one. Sorry I couldn't post the link. Thanks!

    asked on April 4, 2011
  96. Math

    Tell whether the triangle with the given side is a right triangle;14mm, 19mm, 23mm

    asked on November 15, 2010
  97. math

    a spherical balloon with radius r inches has volume V9r) =(4/3)πr^3. Find a function that represents the amount of air required to inflate the balloon from a radius of r inches to a radius of r+1 inches

    asked on September 12, 2010
  98. physics

    A plane flies directly from city A to B, which are separated by 2300mi. From A to B, the place flies into a 65mi/hr headwind. ON the return trip from A to B, the wind velocity is unchanged. The trip from B to A takes 44 min less than the trip from A to B.

    asked on March 7, 2010
  99. Physics

    (a) Suppose you throw a football. At some instant, when the ball is in contact with your hand, your hand exerts a force of 100 N on the ball in the +x direction. What is the force of the ball on your hand?

    asked on November 19, 2009
  100. history

    What would be a good thesis statement for my intro paragraph? Effect and Evolution of African Americans in Minnesota Intro The first Great Migration occurred after the Civil War and after the 13th amendment was passed. With the passing of the 13th

    asked on November 11, 2009

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