Popular questions and responses by daniel
  1. College Physics

    A uniform horizontal rod of mass M and length l rotates with angular velocity w (omega) about a vertical axis through its center. Attached to each end of the rod is a small mass m. Determine the angular momentum of the system about the axis. Write you're

    asked on October 20, 2012
  2. Algebra 2 A

    A jet ski company charges a flat fee of $26.00 plus $3.25 per hour to rent a jet ski. Another company charges a fee of $24.00 plus $3.50 per hour to rent the same jet ski. Using a graphing calculator, find the number of hours for which the costs are the

    asked on September 27, 2017
  3. Chemistry

    Calculate the energy change associated with the transition of an electron from the n=2 shell to the n=5 shell in a Bohr hydrogen atom.

    asked on November 18, 2012
  4. Statistics

    A particular fruit's weights are normally distributed, with a mean of 353 grams and a standard deviation of 6 grams. If you pick one fruit at random, what is the probability that it will weigh between 334 grams and 344 grams?

    asked on May 4, 2015
  5. Physics

    A 821-kg car stopped at an intersection is rear-ended by a 1810-kg truck moving with a speed of 11.5 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the

    asked on November 19, 2011
  6. social studies

    what ar all the anwsers to florida studies weekly on week 13

    asked on December 1, 2010
  7. chemistry

    three student chemists measured 50.0 mL of 1.00 M NaOH in separate Styrofoam "coffee cup" calorimeters ( Part B). Brett added 50.0 mL of 1.10 M HCI to his solution of NaOH; Dale added 45.5 mL of 1.10 m HCL 9 eqaul moles) to his NaOH solution. Lyndsay added

    asked on January 17, 2011
  8. Physics

    An airplane flies at airspeed (relative to the air) of 430 km/h . The pilot wishes to fly due North (relative to the ground) but there is a 43 km/h wind blowing Southwest (direction 225◦). In what direction should the pilot head the plane (measured

    asked on December 30, 2012
  9. physics

    A convex mirror in an amusement park has a radius of curvature of 3.00m. A man stands in front of the mirror so that his image is half as tall as his actual height. At what distance must the man focus his eyes in order to see his image? I calculated the

    asked on March 17, 2012
  10. History

    1. Why did William T. Sherman want to attack Columbia? (1 point) a. because he had lost a previous skirmish there *b. because he wanted to attack the capital of the state where the war began c. because it was located directly in his line of march from

    asked on February 12, 2019
  11. Math

    A fuel oil tank is an upright cylinder, buried so that its circular top 12 feet beneath ground level. The tank has a radius of 6 feet and is 18 feet high, although the current oil level is only 13 feet deep. Calculate the work required to pump all of the

    asked on February 14, 2018
  12. physics

    A steel section of the Alaskan pipeline had a length of 65 m and a temperature of 22° C when it was installed. What is its change in length when the temperature drops to a frigid -37° C?

    asked on July 25, 2013
  13. English

    As the headboy of your school write a speech on the send forth party of the principal of your school.

    asked on May 23, 2011
  14. Algebra 2 A

    A candy store makes a 9-pound mixture of gummy candy, jelly beans, and hard candy. The cost of gummy candy is $2.00 per pound, jelly beans cost $3.00 per pound, and hard candy costs $3.00 per pound. The mixture calls for two times as many gummy candy

    asked on September 27, 2017
  15. Statistics

    Hello. I would like to ask a college statistics question. Q. One hundred draws are made at random with replacement from the box [1,2,2,5]. The draws come out as follows:17 [1]'s, 54 [2]'s, 29 [5]'s. Fill in the blanks, using the options below; show work.

    asked on March 28, 2013
  16. Logic

    Riddle: It's 7:00 AM. You are asleep and there is a sudden knock on the door. Behind the door are your parents who came to have breakfast. In your fridge are bread, milk (pasteurized), juice, and a jar of jam. To answer, what will you open first? * Answer

    asked on May 21, 2019
  17. physics

    A 2.44 kg object is subjected to three forces that give it an acceleration vector a = -(8.00 m/s2)i hat + (6.00 m/s2)j hat. If two of the three forces are vector F1 = (30.7 N)i hat + (17.0 N)j hat and vector F2 = -(12.0 N)i hat + (8.00 N)j hat, find the

    asked on October 19, 2014
  18. American Government

    The city council of Smallton has just chosen a new chief administrator. She will carry out the policies of the council and hire department heads. If the council is not pleased with her work, it has the ability to dismiss her at any time. Which form of city

    asked on November 2, 2017
  19. calculus

    -find the equation of the tangent line to the curve y=5xcosx at the point (pi,-5pi) -the equation of this tangent line can be written in the form y=mx+b where m= and b= -what is the answer to m and b?

    asked on February 24, 2011
  20. geometry

    Let $\overline{PQ}$, $\overline{RS}$, and $\overline{TU}$ be parallel chords of a circle. The distance between chords $\overline{PQ}$ and $\overline{RS}$ is 4, and the distance between chords $\overline{RS}$ and $\overline{TU}$ is also 4. If $PQ = 78$ and

    asked on December 6, 2015
  21. Chemistry (Electrochemistry)

    Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M TI3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced

    asked on January 21, 2015
  22. History

    Which accurately describes the involvement of the Catholic church in medieval European government? A. the rules and rituals of the church guided the administration of government in Europe. B. The Catholic Church forced European Kings to adopt the

    asked on November 1, 2017
  23. Physics

    A young hockey player stands at rest on the ice holding a 1.3-kg helmet. The player tosses the helmet with a speed of 4.6 m/s in a direction 13° above the horizontal, and recoils with a speed of 0.27 m/s. Find the mass of the hockey player.

    asked on November 19, 2011
  24. Physics

    A car is traveling North. In which direction are the wheels turning. This is under the torque chapter

    asked on October 24, 2015
  25. social studies

    How is the government of Belarus different from those of other European countries? A. It is a theocracy led by religious leaders. B. It is a dictatorship with a ruler who has held power for many years. C. It is a monarch, in which power is handed down to

    asked on May 13, 2019
  26. arithmetic

    The sum of the first 10th term of an a.p is 255,the sum of the first 20 term is 1010.find the next 2020 term of the progression

    asked on January 31, 2012
  27. math

    Which of the following is the equation of a direct variation that has a constant of variation equal to -? y = x - -y = x y = -2x y = -x

    asked on May 19, 2011
  28. Algebra 2 A

    What is the minimum value for z=3x-1/2y over the feasibility region defined by the constraints? a.-4 b.-5 c.-3 d.-6 constraints x greater than or equal to 0 y less than or equal to 8 y greater than or equal to x y greater than or equal to -1/2x+6

    asked on September 27, 2017
  29. Math

    My question: A spinner looks like this: A disc divided into sections that might or might not be the same size, with a pointer that when spun will land on some part of the disc at random. The sections might be colours, or, as in these problems, have numbers

    asked on January 8, 2009
  30. ICT

    explain five uses of ICT in communication, timing and control and information processing and data storage

    asked on May 14, 2019
  31. Chemistry

    When 0.100 mol of CaCO3 (s) and 0.100 mol of CaO (s) are placed in an evacuated container with a volume of 10.0-L and heated to 385 K, PCO2 = 0.220 atm after equilibrium is established: CaCO3(s) ⇌ CaO (s) + CO 2 (g) An additional 0.300 atm of CO2 (g) is

    asked on February 9, 2012
  32. Physics

    A 2.0-cm thich bar of soap is floating on a water surface so that 1.5 cm of the bar is under water. Bath oil of specific gravity 0.60 is poured into the water and floats on top of it. What is the depth of the oil layer when the top of the soap is just

    asked on November 10, 2010
  33. Physics

    A 75 kg box slides down a 25 degree ramp with an acceleration of 3.60 meters per second squared. Find the coefficient of kenetic friction between the box and the ramp. What acceleration would a 175 kg box have on this ramp?

    asked on November 3, 2010
  34. Math

    a family budgets 1/2 of its income for housing and 1/3 for food what fraction of their budget do these expenses cover

    asked on October 18, 2016
  35. Civics

    The way good leaders can protect the interest of their followers

    asked on June 27, 2019
  36. Math

    The 3rd and 9th term of a g.p are 54 and 39,336 respectively.find the 6th term,sum of 4th term,sum of 4th and 7th term and product of 2nd and 5th term

    asked on October 30, 2018
  37. History

    Why was the act of toleration enacted? A To ensure African Americans could Maintain their own religious practices B To provide freedom of religion for the Jews C To retain a separation between the church and state D To safeguard freedom of worship to

    asked on October 6, 2016
  38. pre-algebra

    the scale on a map is 1 cm: 7 km. if two cities are 15 cm apart on a map, what is the actual distance in the cities?

    asked on December 5, 2018
  39. Electrochemistry

    Ag2CrO4(s) + 2e- 2Ag(s) + CrO42-(aq) A chemist wishes to determine the concentration of CrO42- electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE; which has a reduction potential of 0.242 V relative to the SHE) and a

    asked on May 20, 2008
  40. Physics

    A green car with a mass of 900 kg is placed in the back of a yellow tow truck that has a pivot at one end. The car is held in place with a chain at the top end of the lift, as pictured below. The chain holding the car in place can withstand a maximum force

    asked on September 15, 2018
  41. physics

    a spring of force constant 1500N/m is acted upon Hy a constant force of 75N .calculate the potential energy stored in the spring

    asked on December 21, 2015
  42. Physics

    A football player kicks a football with an initial velocity of 30m/s at an angle of 55 degrees relative to the flat ground. a)what is the speed of the football at its highest point b)find the highes point reached c)find the total time in the air d)how far

    asked on December 13, 2009
  43. Physics

    A small block of mass m = 1.3 kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h = 54.0 m above the bottom of the loop of radius R = 19.0 m. What is the kinetic energy of the mass at the point A

    asked on December 24, 2013
  44. math

    what is 84 over 100 in simplest form? If i had a calculater i could help you but i can't do it on paper hit me up this is shawn and help me with my problem I don't know what you call simplest form? 84/100 could be written as 0.84. If you want it reduced to

    asked on January 31, 2007
  45. Algebra

    2. The Sugar Sweet Company is going to transport its sugar to market. It will cost $4200 to rent trucks, and it will cost an additional $150 for each ton of sugar transported. Let C represent the total cost (in dollars), and Let S represent the amount of

    asked on August 18, 2011
  46. solving two-step inequality

    Translate the following inequality into written language. 5x-6

    asked on June 9, 2015
  47. Physics

    A car is traveling North. In which direction are the wheels turning. This is under the torque chapter

    asked on October 24, 2015
  48. Reposting chemistry help!!!

    A metal x forms two different chloride.if 12.g of chloride A and 16.3g of chloride B contain 7.1g and 10.7g of chlorine respectively,show that the figure agree with the laws of multiple proportions.write there formulea plz i need the working.....

    asked on January 12, 2016
  49. math

    Look at the numbers below. 75, 74, 72, 69, 65 A: describe the pattern

    asked on November 6, 2014
  50. physics

    asked on February 19, 2012
  51. Algebra 2 math

    In triangle GHI, angle H is a right angle, GH = 40, and cos G= 40/41. Draw a diagram and find each value in fraction and in decimal form. a) Sin G b. Sin I c. Cot G d. csc G e. cos I f. sec H - I have no idea how to do this

    asked on April 8, 2015
  52. Physics

    A liquid (density = 1.65 g/cm^3) flows through two horizontal sections of tubing. In the first section the cross-sectional area is 10.0 cm^2, the flow speed is 275 cm/s, and the pressure is 1.20 x 10^5 Pa. This tubing then rises 50 cm to the second

    asked on November 11, 2010
  53. Chemistry

    What is the number of grams of Hydrogen in 5.45 x 10^22 molecules NH3?

    asked on October 9, 2010
  54. Physics

    A cheetah running at 30 m/s is pursuing a zebra going in a straight line at 14 m/s. If the zebra has a 35 m head start, how much time does it take for the zebra to catch up? (Please show all work. I know the answer, but I need the step by step instruction

    asked on January 30, 2012
  55. life orientation

    how can sports detract nation building

    asked on March 10, 2019
  56. Chemistry

    Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL

    asked on January 19, 2015
  57. physics

    In a water park, people walk up a ramp before diving into the water below. If they cover a horizontal distance of 100 meters before diving down 50 meters, what is the angle made by the ramp with the ground?

    asked on March 25, 2014
  58. Physics

    A rubber ball filled with air has a diameter of 25.0 cm and a mass of 0.540 kg. What force is requiered to hold the ball in equilibrium immediately below the surface of water in a swimming pool? Start equation out by using sumF = ma Answer is 74.9 N I just

    asked on November 11, 2010
  59. chemistry

    What are the freezing point and boiling point of an aqueous solution of 15.5 g glucose(C6H12O6) dissolved in 150 g of water?

    asked on April 7, 2013
  60. physics

    A rectangle has a length of 2d and a height of d. Each of the following three charges is located at a corner of the rectangle: +q1 (upper left corner), +q2 (lower right corner), and -q (lower left corner). The net electric field at the (empty) upper right

    asked on February 22, 2012
  61. math

    A kayaker paddles across a river at a constant speed of 4 miles per hour and a bearing of N 60 degrees E. Which current vector results in the kayaker's actual speed being 5.9 miles per hour and the kayakers actual direction being N 70 degrees E.

    asked on July 3, 2013
  62. chemistry

    what is the molar solubility of AgBr(s) in 3.0M NH3(aq)? Ksp of AgBr(s) is 5x10^-13, Kf of Ag(NH3)2+ is 1.6x10^7

    asked on December 3, 2018
  63. Chemistry

    For the reaction of hydrazine (N2H4) in water, Kb is 3.0 10-6. H2NNH2(aq) + H2O(l)--> H2NNH3+(aq) + OH-(aq) Calculate the concentrations of all species and the pH of a 1.6 M solution of hydrazine in water. [OH-] = [H2NNH3+] = [H2NNH2] = [H+] = pH =

    asked on February 3, 2013
  64. social studies

    institutions that promote national unity

    asked on June 27, 2019
  65. calculus

    Anti Derivative of F''(x) = 4 + 6x + 24x^2, f(0) = 3, f(1)=10 Not sure how to find the value of the constant for F'(x).

    asked on December 6, 2011
  66. 9th grade

    s8impliy this exponential expression): -2 7 -8 ) 6 -9)8 (7) * (x) * (w * (x *(4) * -3) (w

    asked on January 6, 2010
  67. math

    Suppose a white dwarf star has a diameter of approximately 1.6692x10^4 km. Us the formula 4pie^2 to find the approximate surface area of the star

    asked on November 15, 2010
  68. MIPS Assembly programming

    Hi there, I need to implement in assembly mips an iterative binary search method. Here's my code: # this program implements binary search # the equivalent pseudo code is the following: # first = 0 # last = size -1 # while (last - first > 1) { # mid =

    asked on January 7, 2012
  69. math

    1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension.

    asked on April 5, 2013
  70. math

    a plumber charges $25 for service call plus $50 per hour what is the cost 8 hours? What is 10 hours?

    asked on May 17, 2016
  71. Pysics

    Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is

    asked on January 5, 2012
  72. Algebra

    There are 46 flags in a zoo exhibit. Every animal has either two or four legs. List 2 possible choices for the number of each type of animal in the exhibit. The number of two-legged animals is two more than a number of four-legged animals. How many of each

    asked on October 30, 2019
  73. History

    Identify another name given to the Muslim invaders.

    asked on February 25, 2015
  74. English

    Identify the complete adjective clause and the word it modifies. I elected to take astronomy, which is not a required course.

    asked on June 9, 2011
  75. Trigonometry

    a boy standing 70m away from a flag–post observes that the angles of elevation of the top and bottom of the tower on top the flag–post are 70^ and 69^ respectively. Find the height of the tower

    asked on October 23, 2017
  76. math

    1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. No there is no common side (lets say.) Thanks

    asked on April 5, 2013
  77. Math

    Amanda increase the amount of protein she eats every day from 48 g to 54 g. By what percentage did amanda increase the amount of protein she eats?

    asked on March 21, 2017
  78. Algebra

    Find the numbers that each letter stands for. EFGHx4=HGFE E= F= G= H=

    asked on October 30, 2011
  79. Math

    Peter has 4 more $50 bills than $10 bills in his wallet. If the total amount of money in his wallet is $380, how many $10 bills does Peter have? I know the answer but I don't know how to set up the equation.

    asked on February 24, 2016
  80. math

    Suppose the mean length of time that a caller is placed on hold when telephoning a customer service center is 23.8 seconds, with standard deviation 4.6 seconds. Find the probability that the mean length of time on hold in a sample of 1,200 calls will be

    asked on February 21, 2019
  81. Physics

    One end of a spring is attached to the ceiling. The unstretched length of the spring is 10.0 cm. A 2.0 kg mass is hung from the other end of the spring. It is slowly lowered until it comes to rest. At this point the spring is 15 cm long. (a) What is the

    asked on November 23, 2015
  82. math

    What is the order of 1.5 x 10^3, 1.4 x 10^-1, 2 x 10^3, and 1.4 x 1-^-2 from least to greatest?

    asked on November 15, 2010
  83. english

    _____ describes the life cycle of a star.

    asked on March 8, 2017
  84. Physics

    Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is

    asked on January 5, 2012
  85. Math

    Solve the system using elimination. 10y − 2x = 50 6x − 3y = 12 A. (5, 6) B. (2.1, 0.2) C. (2.1, 4.6) D. (6, 5)

    asked on January 5, 2016
  86. Chemistry (Acid-Base)

    Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL

    asked on January 21, 2015
  87. physics

    A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 87.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick

    asked on January 15, 2015
  88. American Government

    Representing the state in lawsuits and trials is the responsibility of which state official? A. attorney general B. treasurer C. governor D. secretary of state

    asked on November 2, 2017
  89. Science

    What letter represents the nucleus of a cell?

    asked on January 7, 2009
  90. Chemistry

    Assume that a reaction occurs in which unknown substances R and S react to form unknown substances T and U. From the information below, determine the mass of substance T that will be formed if 45.0 grams of substance R reacts with 23.0 grams of substance

    asked on May 20, 2008
  91. physics (Right Hand Rule Question)

    A proton traveling due east in a region that contains only a magnetic field experiences a vertically upward force away from the surface of the earth. What is the direction of the magnetic field? a)North b)East c)South d)West e)Down I know I need to use the

    asked on February 17, 2012
  92. Math

    A cylindrical water tank is 70cm in diameter to begin with it is full of water a leak starts in the bottom so that it looses 10 litres every 1 hour how long will it take for the water level to fall by 20cm.

    asked on June 10, 2016
  93. ellipses

    If the major axis is vertical and has a length of 10 units,the minor axis has a length of 8 units,and the center C=(4,-2).Fill in the missing denominators for the equation and determine the distance from C to the foci (c).

    asked on May 11, 2012
  94. math

    use your calculator.show 14. broken keyr is 1. show 2 ways

    asked on September 21, 2011
  95. math

    Which of the following sets of ordered pairs is not a direct variation? (0, 0); (-2, 4); (3, -6) (1, 1); (-2, -2); (3, 3) (10, 2); (15, 3); (20, 4) (0, 0); (1,

    asked on May 19, 2011
  96. grammar

    I have to write 1234.567 in English word form. How do I write this number?

    asked on May 3, 2011
  97. Statistics

    As standard deviation increases, samples size _____________ to achieve a specified level of confidence. A. Increases B. Decreases C. Remains the same

    asked on October 21, 2010
  98. algbra

    According to some students, what is the true purpose of homework

    asked on November 16, 2010
  99. math

    A double recipe of cookies calls for 5 cups of flour. Which of the following proportions could be used to find the amount of flour for a triple recipe? 5/2= f/3 2/5=f/3 2/3 = f/5 3/2=5/f

    asked on May 19, 2011
  100. chemistry

    A buffer is prepared by adding 300.0 mL of M NaOH to 400.0 ML of 2.0 M CH3COOH. What is the pH of this buffer? ks=1.8X10^-5

    asked on March 4, 2012


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