LEILA

Most popular questions and responses by LEILA
  1. SS

    how did the Aztec become so powerful

    asked on October 14, 2016
  2. ELA

    in an article called " Buzz Off " by Kirsten Weir. I need help... 6. what are two consequences of spraying insecticides to get rid of mosquitoes? 7. how are the Oxitec mosquitoes different from the mosquitoes that Anthony James engineered?

    asked on February 23, 2015
  3. chemistry

    Consider the following reaction at 298 K: C(graphite) +2Cl2 (g) -----> CCl4(l) Calculate the following quantities. Delta H: -139 kJ/mol deltaS(sys)=? J/mol*K deltaS(surr)=? J/mol*K deltaS(univ)=? J/mol*K My answer is: deltaS(sys)=-253.3J/mol*K

    asked on March 16, 2012
  4. Physics Need quick help please

    Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me

    asked on May 8, 2013
  5. math

    A smokestack deposits soot on the ground with a concentration inversely proportional to the square of the distance from the stack. With two smokestacks 20 miles apart, the concentration of the combined deposits on the line joining them, at a distance x

    asked on October 29, 2015
  6. Physics Need help please

    An ancient wooden club is found that contains 270g of carbon and has an activity of 8.3 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3x10^-12? t= in years

    asked on May 7, 2013
  7. math

    A rectangular beam is cut from a cylindrical log of radius 15 cm. The strength of a beam of width w and height h is proportional to wh^2. Find the width and height of the beam of maximum strength. (Round your answers to two decimal places.) h= ? w = ?

    asked on October 29, 2015
  8. chemsitry

    How many grams of propane (C3 H8 ) will react with 3.29 L of O at 1.05 atm and -34°C? i know the balanced eqn is 1C3H8 + 5 O2 -----> 3CO2 + 4H20 and that PV=nrt , with T= -34 + 273.15 = 239.15K. n=(PV)/(RT) (F=for O2). = 0.176 mol O2 0.176 mol O2 * (1mol

    asked on October 23, 2014
  9. Physics please help me out! thank you

    If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you

    asked on May 8, 2013
  10. DrBob222 PLEASE HELP!

    I posted this question already but you never replied back :( Consider the following reaction at 298 K: C(graphite) +2Cl2 (g) -----> CCl4(l) Calculate the following quantities. Delta H: -139 kJ/mol deltaS(sys)=? J/mol*K deltaS(surr)=? J/mol*K deltaS(univ)=?

    asked on March 17, 2012
  11. Physics Plz help me

    If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you

    asked on May 6, 2013
  12. Math

    How many square inches of crust would it take to cover the bottom of a pie dish with a 15 inch diameter

    asked on March 20, 2017
  13. MATH SETS AND COUNTING

    There are a total of 103 foreign language students in a high school where they offer only Spanish, French, and German. You are given the following details for this semester: 44 take Spanish. 44 take French. 42 take German. 7 take Spanish and French but not

    asked on October 4, 2010
  14. SS

    Ming Moved to toronto 10 years ago when he was three. He still Speaks Chinese but has learned english and some french. he celebrates both chinesse and canadaian holidays.ming best reflects that canada is a____________.

    asked on September 18, 2016
  15. Physics

    A driver of a car going 90 km/h suddenly sees the lights of a barrier 40.0 m ahead. It takes the driver 0.75 s to apply the brakes, and the average acceleration during braking is -10 m/s2. (a) Compute for the total displacement of the car to determine

    asked on March 4, 2015
  16. Physics Plz help me

    If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6

    asked on May 7, 2013
  17. history

    can someone help me write a thesis statement about susan B. Anthony and her role for helping women. It needs to be something along the lines of: Without Anthon'y creation of..........would not have been possible or Susan Anthony made the greatest

    asked on September 4, 2008
  18. math

    You run a small furniture business. You sign a deal with a customer to deliver up to 700 chairs, the exact number to be determined by the customer later. The price will be $150 per chair up to 600 chairs, and above 600 the price will be reduced by $0.25

    asked on October 29, 2015
  19. projectile motion

    You fire a squirt gun horizontally from an open window in a multistory building and make note of where the spray hits the ground. Then you walk up to a window 5.0 m higher and fire the squirt gun again, discovering that the water goes 1.5 times as far.

    asked on November 14, 2010
  20. projectile motion

    A home run just clears a fence 105 m from home plate. The fence is 4.00 m higher than the height at which the batter struck the ball, and the ball left the bat at a 31.0° angle above the horizontal. At what speed did the ball leave the bat

    asked on November 14, 2010
  21. biology

    Is Turner Syndrome dominant or recessive?

    asked on April 2, 2019
  22. Physics Help me Someone plz

    If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6

    asked on May 7, 2013
  23. Physics

    What is the smallest possible value for the angular momentum L of an electron in the n=5 shell? Lmin= 0 kg*m^2/s What is the largest possible value for the angular momentum L of an electron in the n=5 shell? What is the Lmax? Please help I don't get

    asked on April 30, 2013
  24. math

    A motorboat can maintain a constant speed of 16 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 20 minutes and the return trip takes 15 minutes. What is the speed of the current?

    asked on September 3, 2008
  25. Physics

    When the space shuttle (mass of the shuttle = 2 x10^6 kg) was at the outer limit of Earth's atmosphere (distance = 350 km above Earth's surface), astronauts measured the gravitational force from Earth to be equal to 1.7 x 10^7 newtons. Assuming that both

    asked on May 20, 2012
  26. Math

    You are fi ve feet tall and cast a seven-foot eight-inch shadow. At the same time, a basketball hoop casts a 19-foot shadow. How tall is the basketball hoop? Assume the triangles are similar.

    asked on April 6, 2011
  27. math

    A motorboat can maintain a constant speed of 16 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 20 minutes and the return trip takes 15 minutes. What is the speed of the current?

    asked on September 3, 2008
  28. GEOMETRY

    A 4x7 rectangle can be rotated about the long side to generate a cylinder. It also can be rotated about the short side to generate a cylinder. Find the lateral area and surface area of the 2 cylinders . PLEASE HOW. TELL ME

    asked on July 21, 2013
  29. PHYSICS ---HELP!

    A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

    asked on October 6, 2010
  30. SETS AND COUNTING

    In a survey of 289 college students, it is found that 65 like Brussels sprouts, 93 like broccoli, 55 like cauliflower, 28 like both Brussels sprouts and broccoli, 24 like both Brussels sprouts and cauliflower, 20 like both broccoli and cauliflower, and 13

    asked on October 4, 2010
  31. English Lit

    I need help on proof reading this story. Christmas should be a time of celebrating the birth of Christ, but it seems like people make it more about themselves and what should they get for each other and who’s gift is more expensive or how we can compete

    asked on April 2, 2010
  32. Chemistry

    write a balanced nuclear equation for the reaction that occurs when uranium-335 absorbs a neutron and undergoes fission to produce 3 neutrons, bromine-65 and another nucleus.

    asked on January 24, 2017
  33. Science

    in a homes central heating system when the room temperature measured by the thermostat reaches a set value the thermostat sends a message to the heater and the heater switches off These action are an examples of a

    asked on September 14, 2016
  34. the tail

    which statement from the tail is he best example of indirect characterization

    asked on October 13, 2016
  35. HESI

    Rick rides 11 1/8 miles in an hour with his bike in second gear going uphill. If Rick rides downhill in fourth gear he goes 2 1/2 times faster. How many miles will Rick go in an hour downhill in fourth gear?

    asked on June 2, 2015
  36. Physics

    -Estimate the total binding energy for copper? in MeV -Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons? E= in Joulea Please help me I am confused...thanks

    asked on May 6, 2013
  37. chemistry

    [Cu(NH3)4]2+ + SO4(aq)2 + H2O [Cu(NH3)4]SO4•1H2O What is the theoretical yield of the products?

    asked on September 14, 2010
  38. Physics

    for gamma radiation 1rad=1rem, but for alpha radiation 1 rad=20rem. Why is there a difference?

    asked on January 14, 2009
  39. physics

    A positive and a negative charge, each of magnitude 1.7 10-5 C, are separated by a distance of 11 cm. Find the force on each of the particles. what formula do i use?

    asked on January 12, 2008
  40. Physics

    We have a heat engine that produces 150 J of heat, does 40 J of work, and emits 110 J into another system. What is the efficiency of the heat engine? Please don't give me the answer! Just help figure out how to find it! The description for the lesson with

    asked on December 5, 2016
  41. Physics

    Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me

    asked on May 7, 2013
  42. Physics

    If the cosmic microwave background radiation (CMBR) is at a temperature of 2.7K, what is its peak wavelength?

    asked on April 23, 2012
  43. social studies

    who was the self made millionare from florida who started the door-to-door sale after the civil war???????? I NEED HELP!

    asked on March 14, 2011
  44. projectile motion

    You have a boat with a motor that propels it at vboat = 4.5 m/s relative to the water. You point it directly across the river and find that when you reach the other side, you have traveled a total distance of 27 m (indicated by the dotted line in the

    asked on November 14, 2010
  45. MATH

    Find the monthly payments for an ordinary annuity that will yield a future value of $122000 at % interest for 22 years. payment

    asked on September 22, 2010
  46. Math

    katie is going to adopt kittens from a litter of 11. how many ways can she choose a group of 3 kittens?

    asked on May 5, 2010
  47. Algebra 1- 8th Grade

    According to the 1990 Census, the population of the United States was 2.49 x 10^8. The cost of taking the census in 1990 was 2.6 x 10^9 dollars. How much did the census cost per person in the United States?

    asked on April 29, 2009
  48. English

    1. Click the sentence in which the subject and action verb have been underlined, and all prepositional phrases are in parentheses. A. (During the Flood), the Ark floated (over the water). B. During the Flood, (the Ark) floated (over the water). C. (During

    asked on January 10, 2018
  49. Math

    I'm struggling with factoring these two questions. 36x^4 - 3x^3 - 18x^2 9x^2 + 3xy - 2y^2

    asked on February 4, 2017
  50. Calculus

    Given 4∫8 (4 on top, 8 on bottom) f(x)dx= 12 and 4∫8 g(x)dx= 5. Evaluate the following: 4∫8 [2f(x)-3g(x)]dx Would I just put 12 in for f(c) and 5 in for g(x) then solve?

    asked on November 9, 2016
  51. HEALTH

    do you think there is big difference in the number of deaths caused by disease and those not caused by disease.

    asked on October 5, 2016
  52. Physics

    A 1 kg apple sits on a table. What is the normal force of the table acting on the apple?

    asked on January 12, 2016
  53. math

    For positive a, b, the potential energy, U, of a particle is given by U = b (a^2 over x^2 - a over x) for x is greater than 0 a) find the x-intercept b) find the asymptotes c)compute the local minimum d) sketch the graph I don't know how to start this

    asked on October 29, 2015
  54. Science

    A rod of length L=1.80m is mounted to a wheel (solid cylinder) of radius R=8.00cm. A massless rope is wound on the wheel, and then connects to a block of mass m=0.250kg. The mass is released from rest and allowed to fall. 1. Find the tension in the rope.

    asked on June 16, 2014
  55. Physics Need help plz

    An 1900 kg car is traveling with a speed of (22 +- .22) m/s. With what maximum accuracy can its position be determined? delta x= in meters Can someone please help me out I am lost on this on...Thank you

    asked on April 30, 2013
  56. Astronomy

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 23, 2012
  57. PHYSICS ---HELP!

    Water flows approx. 0 over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.

    asked on October 6, 2010
  58. alg. II

    Graph and state domain and range: f(x)=[x] (greatest integer function)

    asked on July 5, 2010
  59. Math

    wat is 5 times 5?

    asked on September 30, 2007
  60. calc

    Sketch the regions represented by the following integrals and evaluate them using geometric formulas. 4 integral 1: 2x+3dx 6 integral -2: lx-1l dx (absolute value of x-1

    asked on November 9, 2016
  61. SS

    How is unity and division a theme in Canadian history? How did distinct English and French populations form in Canada? What is the relationship between natural resources and European settlement? How is conflict and compromise a theme in Canadian history?

    asked on September 17, 2016
  62. Science 5

    The path that energy & nutrients follow is an ecosytem is called an

    asked on January 22, 2016
  63. chem

    The allium family of vegetables, which include onion, leek, garlic and chives contain sulfur containing compounds. These chemicals are responsible for the vegetables' characteristic odour and properties. One such compound is allylmercaptan. 10.0 g of an

    asked on April 29, 2015
  64. Physics to Elena

    Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me

    asked on May 8, 2013
  65. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 24, 2012
  66. Astronomy

    If the cosmic microwave background radiation (CMBR) is at a temperature of 2.7K, what is its peak wavelength?

    asked on April 23, 2012
  67. Algebra

    trains a and b are traveling in the same direction on parallel tracks. train a is traveling at 60 miles per hour and train b is traveling at 64 miles per hour. train a passes a station at 1:25 pm. if train b passes the same station at 1:55 pm, at what time

    asked on March 1, 2010
  68. Algebra 1- 8th Grade

    Find each product. 1) 2t(t + 2) 2) (2n +1) * (n - 4)

    asked on April 30, 2009
  69. Biology

    Describe two scientific theory (atomic,kinetic,cell theory) and non scientic (moral, ethical, religious theories ).Differentiate between the scientific and non scientific theories explaining why there are some questions that science cnnot answer.

    asked on October 1, 2008
  70. math

    Wendy is a loan officer and has 1,000,000 to lend and is required to get an average return of 18% per year. If she can lend at the rate of 19% or at the rate of 16%, how much can she lend at 16% rate and still meet the requirement?

    asked on September 2, 2008
  71. Economics

    Demand function for Zatab: Qd = 15.0 - 0.2P Q = annual quantity demanded P = wholesale price of one Zatab unit Production cost per unit: $5 Mirk Lab incurred a $60 million R&D cost a decade ago 1: What wholesale price will Mirk Labs set? 2: How much Zatab

    asked on March 10, 2008
  72. SS

    who are the first nations...Canada

    asked on September 16, 2016
  73. SS ICY NORTH

    HELP I NEED A TO READ ON ICY NORTH WHAT DO I READ

    asked on September 12, 2016
  74. physics

    A rifle is shot with 30.0m for distance and hit's a target at 1.90cm as a height. What is the flight time? What is the velocity of the shot?

    asked on May 19, 2016
  75. science

    A man shots a rifle with 30.m and hit's an object at 1.90cm. What is the flight time? What is the velocity of the shot? 1.90=.19m

    asked on May 19, 2016
  76. Chemistry

    Name the element that has a density of 4.700 g/mL at STP

    asked on January 23, 2016
  77. Math/algebra

    9/55 8/62 5/37

    asked on February 18, 2015
  78. Physics!

    The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)

    asked on May 8, 2013
  79. Physics

    The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)

    asked on May 7, 2013
  80. Physics Plz help me

    The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)

    asked on May 6, 2013
  81. Physics Plz help me

    The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)

    asked on May 6, 2013
  82. Physics Need help plz

    An 1900 kg car is traveling with a speed of (22 +- .22) m/s. With what maximum accuracy can its position be determined? delta x= in meters Can someone please help me out I am lost on this on...Thank you

    asked on April 29, 2013
  83. math

    In a problem on percentages there are three quantities that are involved. These are the base, the amount, and the rate percent. Express the relation between them in the form of an equation and explain with examples how to find each one of them given the

    asked on June 22, 2012
  84. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.725K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space?

    asked on April 24, 2012
  85. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.725K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space?

    asked on April 24, 2012
  86. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 24, 2012
  87. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 24, 2012
  88. Astronomy

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 23, 2012
  89. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 23, 2012
  90. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 23, 2012
  91. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 23, 2012
  92. Physics

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 23, 2012
  93. Astronomy

    Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in that direction? Are we moving toward or away from the region of space? What is our velocity with respect to the CMBR?

    asked on April 23, 2012
  94. Astronomy

    If the cosmic microwave background radiation (CMBR) is at a temperature of 2.7K, what is its peak wavelength?

    asked on April 23, 2012
  95. math

    The gas tank in Micheal's car can hold 18.0 gallons. If the tank currently contains 5.5 gallons, what fraction of the tank is full?

    asked on February 16, 2011
  96. physics

    A juggler throws a ball from height of 0.950 m with a vertical velocity of +5.50 m/s and misses it on the way down. What is its velocity when it hits the ground?

    asked on November 14, 2010
  97. history

    can someone tell me what this article is about? just type it in google- I don't really understand it. What I got from it is that Mcain is sort of going back on what he said years ago but i don't really get it. McCain Embraces Regulation After Many Years of

    asked on September 17, 2008
  98. Economics

    Hello, I'm kind of struggling with this question. Can someone please help clarify this question. Since stock price beta tend to vary depending on the time frame analyzed, daily, weekly, and monthly. How do these factors influence or undermine the

    asked on March 9, 2008
  99. ETH125

    I'm having a hard time understanding the Checkpoint assignment on Legislation Legacy...Can anyone help me? Here is the question: Post a summar of a current issue between Native Americans and the federal government. Identify the legislation that you think

    asked on June 23, 2007
  1. Math

    1 isn't prime- no offense Damon, so only 2 sets...

    posted on May 28, 2019