Popular questions and responses by DJ
  1. physics

    An elevator (mass 4125 kg) is to be designed so that the maximum acceleration is 0.0400g. What is the maximum force the motor should exert on the supporting cable? What is the minimum force the motor should exert on the supporting cable?

    asked on October 8, 2009
  2. software

    The questions ask List four major functions of an OS. My answer: Function 1: Provide a user interface Function 2: Manage files Function 3: Manage hardware Function 4: Manage applications Is my answer correct?

    asked on February 12, 2013
  3. physics

    An airplane is heading due south at a speed of 515 km/h. A wind begins blowing from the southwest at a speed of 100 km/h (average). (Hint: First draw a diagram.) (a) What is the velocity (magnitude and direction) of the plane relative to the ground?

    asked on September 26, 2009
  4. Geometry

    A regular hexagon is made from equilateral triangle by cutting along the dotted lines and removing the three smaller triangles. if triangle has a perimeter of 18, what is the perimeter of hexagon?

    asked on June 10, 2010
  5. Science

    Angiosperms & Gymnosperms both produce? A.)Flowers B.)Cones C.)Spores D.)Seeds

    asked on September 28, 2015
  6. College Cal 1

    A farmer wants to fence off a rectangular field of area 15000 square feet using barbed wire fencing. SInce the opposite of the road is a corn-field, he wants a two-strand fence along the road, and one strand on each of the other three sides. What are the

    asked on April 14, 2014
  7. math problem

    very confused could someone help me with this using the elimination method 5r-3s=16 3r+5s=30

    asked on January 21, 2012
  8. Physics Work and Energy

    A 55 kg trampoline artist jumps vertically upward from the top of a platform with a speed of 5.5 m/s. (Ignore small changes in gravitational potential energy.) (a) How fast is he going as he lands on the trampoline, 3.0 m below? (b) If the trampoline

    asked on November 23, 2009
  9. Algebra

    The volume of a cylinder varies jointly as the height of the cylinder and the square of its radius. If the height is doubled and the radius is halved, determine the effect on the volume.

    asked on January 29, 2020
  10. Organic Chemistry

    what is the major product of a reaction with 1-butene and Br2 in water?

    asked on October 23, 2012


    asked on January 21, 2012
  12. physics - PLEASE HELP

    A person whose eyes are H = 1.62 m above the floor stands L =2.24m in front of a vertical plane mirror whose bottom edge is 43 cm above the floor. What is the horizontal distance x to the base of the wall supporting the mirror of the nearest point on the

    asked on March 8, 2010
  13. Physics - Work and Energy

    Jane, looking for Tarzan, is running at top speed (3.6 m/s) and grabs a vine hanging vertically from a tall tree in the jungle. How high can she swing upward? Does the length of the rope matter?

    asked on November 16, 2009
  14. English/Reading

    Hidden meaning? PPPP --------- earth Thanks!

    asked on September 6, 2007
  15. math

    Last year, Lucy deposited $3000 into an account that paid 5% interest per year and $7000 into an account that paid 4% interest per year. No withdrawals were made from the accounts.

    asked on March 8, 2017
  16. math

    a scale drawing has a scale of 1cm:3m explain how the scale can be used to find the actual distance between objects in the drawing

    asked on October 22, 2015
  17. Algebra

    The area of a rectangle is 21 ft^2,and the length of the rectangle is 1 ft less than twice the width. Find the dimensions of the rectangle.

    asked on November 3, 2014
  18. chemistry

    When the concentration of CH3Br and NaOH are both 0.150M, the rate of the reaction is 0.0020M/S. (a) What is the rate of the reaction if the concetration of CH3Br is doubled? _______________M/s (b) What is the rate of the reaction if the concentration of

    asked on February 27, 2013
  19. physics

    b. If you are cruising down the road at 50 mph and a policeman with a radar gun (wavelength 1 cm) reflects radar light off your bumper, what wavelength of radar light does he get back? Assume the policeman is stationary, and you are moving towards him.

    asked on April 15, 2012
  20. Physics 101

    A 90-dB sound is absorbed by an eardrum 0.75 cm in diameter for 2 hours. How much energy in joules does the eardrum absorb at that time?

    asked on May 19, 2011
  21. Physics

    Two Q = +6.72 mC charges are placed at opposite corners of a square d = 1.5 m on each side, and -Q = -6.72 mC charges are placed at the remaining corners, as shown in the figure. Q___________-Q | | | | | | | | -Q__________Q

    asked on April 8, 2010
  22. science

    measurement of an average classroom door is closest to 1 meter

    asked on February 12, 2009
  23. science

    measurement of an average classroom door is closest to 1 meter

    asked on February 12, 2009
  24. math

    Kendra is using 27 blue patches and some white patches to make a quilt. The quilt has a total area of 540 square inches. Each patch has an area of 5 square inches. How much of the area of the quilt is white? Explain.

    asked on January 7, 2018
  25. I need help!

    what is blogging journaling B.posting in photo galleries C.uploading movie online D.sharing photos on a social network i think its A or D

    asked on January 3, 2018
  26. I need help!

    You and some friends rent a limousine for a formal reception the bill for the evening is $53.00. A tax of 6% will be added to your total. And you want to tip the chauffeur for his excellent driving. you decide to leave him a tip that is 20% of the bill

    asked on January 2, 2018
  27. I need help!

    Write the fraction as a percent. If necessary, round to the nearest tenth of a percent. 6 4/5 a. 68% b. 6.8% c. 6.4% d. 680%

    asked on January 2, 2018
  28. Correct me if i'm wrong

    A bike was originally $240.00. The price war marked up 15%. What is the new price of the bike? A. $250.00 B. $264.00 C. $268.00 D. $276.00***

    asked on December 30, 2017
  29. Physics

    10 mol of an ideal gas expands isothermally at 373 K to 2.6 times its initial volume. Find the heat flow into the system. The universal gas constant is 8.31 J/K · mol. Answer in units of J. Any help much appreciated, I have no idea where to begin with

    asked on April 16, 2017
  30. History

    1.)Studies conducted in england during the industrial revolution have shown that children born to poor families were, on average, shorter than those born to wealthier parents. The most likely expalanation for this difference in hieghts is a difference in

    asked on October 20, 2015
  31. Math,Science,Algebra,Geography

    Beryl Really Likes taking care of all the details needed to finish up a project. Her Belbin Team Role is? A.)Computers/Finisher B.)Resource/Investigate C.)Sharper D.)Plant

    asked on September 30, 2015
  32. Math,Science,Algebra,geography

    The 3 Letter code that summaries your 3 strongest career types is called your? A.)Holland-Code B.)Myers-Briggs Type C.)Teamwork Profile D.)Beblin Code

    asked on September 30, 2015
  33. Science

    which pair of terms correctly completes the diagram with (a) before "spores" and (b) after "spores"

    asked on September 28, 2015

    How many atoms of carbon are present in 12.9 g of a compound that is 36 .7% carbon, by weight? Answer in units of atoms.

    asked on March 13, 2015
  35. aldrabra

    Write a rule for the linear function in the table. x f(x) –4 16 0 0 4 –16 8 –32 A. f(x) = –4x B. f(x) = x + 16 C. f(x) = 4x D. f(x) = -1/4x

    asked on January 8, 2014
  36. Math

    The height of a parallelogram with an area of 300 square yards and a base of 15 yards and 1 more question A rectangle has verticles W(2,3) X (2,6) Y(7,6) and Z(7,3) Describe how to find the side lengths of the rectangle without graphing

    asked on March 6, 2013
  37. Statistics

    Can you explain confidence intervals as it relates to the results of this obesity study? Results. Of 3069 sampled students, 2681 (87%) were measured. The prevalence of overweight was 43% (95% confidence interval [CI] = 39%, 47%), more than half of whom

    asked on January 7, 2013
  38. Chemistry

    What is the ionic equation for hydrolysis reaction of NH4C2H2O2 ? Thanks.

    asked on October 22, 2012
  39. statistics

    A vending machine dispenses coffee into a sixteen ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.03 ounces. You can allow the cup to overfill 10% of the time. What amount (in ounces) should you

    asked on May 25, 2011
  40. Statistics

    A computer manufacturer is about to unveil a new, faster personal computer. The new machine clearly is faster, but initial tests indicate there is more variation in the processing time. The processing time depends on the particular program being run, the

    asked on March 25, 2011
  41. criminal justice

    what are 2 major influencing factors and how dose federal sentencing guidelines have an effect on these influences

    asked on November 30, 2010
  42. chemistry

    what is the molecular mass of a solute if a solution containing 150 g of that solute and 1.0 kg of water has a boiling point of 102.0 degree c? (Kb= 0.512 degree C/m)

    asked on November 28, 2010
  43. chemistry

    How many {\rm NO}_{2} molecules would form as products if the reaction had a percent yield of 75\%?

    asked on September 20, 2010
  44. MATH

    Joe bought 2 dozen eggs at the store. On the way he dropped the eggs and broke 3/4 of them. How many eggs broke?

    asked on December 8, 2009
  45. home economics

    what are ten careers in home economics

    asked on December 4, 2009
  46. physics

    A window washer pulls herself upward using the bucket-pulley apparatus. The mass of the person plus the bucket is 69 kg.How hard must she pull downward to raise herself slowly at constant speed?If she increases this force by 11 percent, what will her

    asked on October 13, 2009
  47. english

    Which of the following is the best opening sentence for a business letter that you want to sound fairly informal? A. I am in receipt of your order of February 10. B. This letter is to make you cognizant of our receipt of your order. C. Your order of

    asked on February 28, 2009
  48. Math

    Write 1024 as a power of 4.

    asked on September 13, 2008
  49. science

    why do we celebrate earth day? is it important to celebrate earth day?

    asked on April 18, 2008
  50. science

    Can someone help me with this question please? explain how earth naturally recycles carbon dioxide.

    asked on April 10, 2008
  51. science

    If Earth is 149.6 million Kilometers from the sun, or 93 million miles away. suppose there was an imaginary road from earth to the sun. If you were in a car traveling 100 km an hour, it would take you 1,490,000 hours or just 170 years to reach the sun. If

    asked on April 2, 2008
  52. science

    Give example of constructive and destructive interference sound waves?

    asked on February 9, 2008
  53. Science

    What are some Positive effects of Genetic Engineering and Negative effects of Genetic Engineering.

    asked on June 1, 2020
  54. Math

    there were 35 student in gym class.if they were separated in to teams of 7, how many people would be on each team. what is the number model you used to sove this? please use a drawing to show your work.[4oa2]

    asked on April 1, 2020
  55. English

    (1)Everything I know about gardening I learned from my good friend Sandy.(2)When I first moved from Iowa to Georgia last May, I tried planting a vegetable garden right away.(3)As I happily weeded the ground I thought to myself, "My garden's produce will be

    asked on October 14, 2019
  56. Pre-Algebra

    1. What is the product of (5.1x10^3)x(3.2x10^3) A. 16.32 x 10^6 B. 1.632 x 10^7 C. 16.32 x 10^9 D. 1.632 x 10^10 2. What is the product of (7.28x10^-2)(9.1x10^-2) A. 6.6248 x 10^-3 B. 66.248 x 10^-4 C. 6.6248 x 10^4 D. 66.248 x 10^-3 3. What is the

    asked on September 24, 2019
  57. math

    (-6)+(-3) - (-1) - (4)

    asked on August 2, 2019
  58. Algebra

    A machining company manufactures washers. The dimensions of the washer are 2cm for the inner circle and 4cm for the outer circle. And the inner and outer radii is positive and negative 2. The range of acceptable values is called the tolerance. Write an

    asked on September 19, 2018
  59. math

    anonymous did you ever get all the correct answers?

    asked on May 25, 2018
  60. Correct me if i'm wrong

    find 21/25 of $27,000 A.$32,140 B.$5,670 C.$22,680*** D.$23,760

    asked on January 2, 2018
  61. I need to make sure this is right!

    Order from least to greatest. 0.29, 2/7, 25%, 0.2 25%, 0.2, 2/7, 0.29 0.2, 25%, 2/7, 0.29 *** 0.29, 2/7, 25%, 0.2 0.29, 2/7, 0.2, 25%

    asked on January 2, 2018
  62. I need help!

    1. Write a ratio and a percent for the shaded area. A 6x6 grid with 12 blocks shaded i don't want the answer i just need help figuring this out.

    asked on January 1, 2018
  63. Physics

    A rollPhyer coaster loaded with passengers has a mass of 2000kg; the radius of curvature of the track at the lowest point of the ride is 24m. If the vehicle has a tangental speed of 18m/s at this point, what force is exerted on the vehicle by the track?

    asked on November 26, 2017
  64. Check Answers: Web Browser

    IMG SRC =imaginaryurls/images/page2/photo.gif What file is being called by this IMG tag? My Answer: /images/page2/photo.gif What type of link is used to call this file? My Answer: HTML????

    asked on April 28, 2017
  65. Physics

    A uniform rod of mass 444 g and length 1.41 m is pivoted about one end and oscillates in a vertical plane. Find the period of oscillations if the amplitude of the motion is small. The acceleration of gravity is 9.8 m/s^2. Answer in units of s.

    asked on April 23, 2017
  66. Math

    A cylindrical juice glass is 8 centimeters tall and has a diameter of 6 centimeters. If the glass is ¾ full, find the volume of the juice in the glass.

    asked on April 21, 2017
  67. Writing

    What audience was “Why, You Reckon?” short story by the author Langston Hughes written for?

    asked on March 6, 2017
  68. Physics

    A 231 kg block is released at height h = 3.9 m. The track is frictionless except for a portion of length 6.6 m. The block travels down the track, hits a spring of force constant k = 1624 N/m, and compresses it 1.7 m from its equilibrium position before

    asked on February 26, 2017
  69. Physics

    A 231 kg block is released at height h = 3.9 m. The track is frictionless except for a portion of length 6.6 m. The block travels down the track, hits a spring of force constant k = 1624 N/m, and compresses it 1.7 m from its equilibrium position before

    asked on February 26, 2017
  70. Math

    Alex bought 9 tickets for $30. Adult tickets cost $4 and children's cost $2. How many children's tickets did he purchase?

    asked on February 16, 2017
  71. Math

    if the union member is able to invest their $12,000 is a fund that pays 1.8% compounded continuously, in how many years will the future values be worth $20,000?

    asked on February 13, 2017
  72. english

    (b) Choose two of the scientists you read about in the Stories of Scientists unit. Compare and contrast these scientists. Answer this question in no fewer than two paragraphs. Be sure to include specific details about each scientist’s life, career, and

    asked on January 27, 2017
  73. Civics

    How did the ideas of Locke and montesquieu influence our founders views on our government?

    asked on October 3, 2016
  74. Science

    A species with two colour variation one mostly green and one is brown.How might populations of species change if the environment becomes a patchwork of tiny green and brown splotches? tnx.

    asked on September 7, 2016
  75. Science

    How do the colour of survivor animals relate to their habitat background? possible explanation tnx a lot

    asked on September 6, 2016
  76. Science

    what are some barriers to solve the zika virus problem? What are some possible solutions for zika virus problem? According to the off the podium article about zika virus. tnx a lot .

    asked on August 31, 2016
  77. Humanities

    Why is the Nice France Attack matters to you right now? *I already wrote a short paragraph but I need one more short paragraph to make it two. Can someone help me. Thanks a lot.

    asked on August 23, 2016
  78. social

    Please. Can someone help me write chapter 31 of the "Pay Forward Book" by Catherine Ryan Hyde. The book only have 30 chapters and we are ask to write chapter 31. Thank you

    asked on May 9, 2016
  79. social

    Can someone help me write the chapter 31 of the "Pay it Forward Book" by Catherine Ryan Hyde. Thank You

    asked on May 9, 2016
  80. MATH

    1 3/4 cups of milk for 8 serving if the recipe increase to 24 serving how many cups of milk are needed. I

    asked on February 18, 2016
  81. MATH

    1 3/4 cups for 8 serving if the recipe increase to 24 serving how many cups of milk are needed

    asked on February 18, 2016
  82. Social studies

    Can someone make me a fractured fairy of Cinderella. Exposition? Initial incident? Rising Action? Climax? Resolution? THANK YOU.

    asked on January 23, 2016
  83. Science

    Describe how changes in society's attitude toward people in wheelchairs may have led changes in the wheelchair available to people who need them.Were these changes made using science or technology or both? Thank you.

    asked on January 21, 2016
  84. Science

    How science has been used to improve the vehicles that we drive today?

    asked on January 21, 2016
  85. History

    1.)Studies conducted in england during the industrial revolution have shown that children born to poor families were, on average, shorter than those born to wealthier parents. The most likely expalanation for this difference in hieghts is a difference in

    asked on October 21, 2015
  86. Science

    What is the difference between the density of cold water and the density of hot water.. Explain using the particle theory of matter. Thank You......

    asked on October 19, 2015
  87. Physics

    A hot-air balloon is rising upward with a constant speed of 2.65 m/s. When the balloon is 3.40 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

    asked on October 7, 2015
  88. Math,Science,Algebra,Geography

    the personality type theory that gives people codes based on their levels of four traits, including sensing-intuition or making of thinking-feeling is called the? A.)Holland Code B.)Myers-briggs C.)Beblin Roles D.)Team Work Profiles

    asked on September 30, 2015
  89. math

    Jeremy enlarged a picture.The length of the original picture is 8cm and the width is 5cm.The length of the enlarged picture is 10cm and the width is 7cm. A.What percent is the 10cm length of the 8cm length? B.What is the area of each picture?By what

    asked on September 28, 2015
  90. Science


    asked on September 28, 2015
  91. stats

    A sample has a mean of M = 73 and a standard deviation of s = 5

    asked on June 18, 2015
  92. chemistry

    If the theoretical yield of a reaction is 0.173g and the actual yield is 0.165g , what is the percent yield?

    asked on June 15, 2015
  93. chemistry

    Stainless steel is an alloy of iron containing 5 percent nickel and 0. 175 percent chromium. How much chromium is present in a 72.2 g sample of this alloy? Answer in units of mol.

    asked on March 13, 2015
  94. chemistry

    What is the % carbon by weight in 1.7 grams of potassium carbonate (K2CO3)? Answer in units of %.

    asked on March 13, 2015
  95. Kennedy King

    Present Value of an Annuity Sandra and Regina earn the same salary. However, Regina has been far more financially responsible. She pays her bills on time and pays off her credit card debt quickly. Sandra had been less financially responsible. She often

    asked on October 12, 2014
  96. geometry

    The lateral area of the right regular triangular prism is 18 cm^2.Find the total surface area.give your answer in decimal form rounded of to 2 decimal places

    asked on June 4, 2014
  97. math

    how much money do I need to deposit today to end up with 13000.00 in 3 years with interest rate 6.5

    asked on October 7, 2013
  98. 7th grade pre-algebra

    The problem is a(a-c)=23. Solve for c if both a and c are positive numbers. Thanks

    asked on September 23, 2013
  99. Psychology- the Science of the Mind

    A reflex, like automatically removing your hand from a hot stove, involves pain message sent to the spinal cord by___neurons, while the movement of your hands is controlled by____ neurons. A. somatic ;sensory B. sensory; motor C. motor; sensory D. somatic;

    asked on July 2, 2013
  100. math

    The first term of a geometric sequence is -2 and the common ratio is 3. What is the 12th term of the sequence?

    asked on May 24, 2013


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