Most popular questions and responses by Neha
  1. Physics

    1. Question: Consider two planets with uniform mass distributions. The mass density and the radius of planet 1 are p1 and R1, respectively, and those of planet 2 are p2 and R2. What is the ratio of their masses? Ans: M1/M2 = (p1/p2)(R1/R2)^3...I got this

    asked on August 28, 2011
  2. Science

    How many moles of mercury will be produced by electrolyzing 1.0M Hg(NO3)2 solution with a current 2.00A for 2 hours.

    asked on February 20, 2017
  3. maths

    The sum of two opposite angles of a parallelogram is 130 find all the angles of the parallelogram

    asked on July 8, 2015
  4. Physics

    An object of mass 0.5 kg is whirled at the end of a string 0.8 m long.If the string makes three revolution in 1.2 s,find the tension in the string.

    asked on July 18, 2014
  5. Chemistry

    92.01 grams of N2O4 (g) is placed in a container and allowed to dissociate. N2O4 (g) --> 2NO2 (g) The mixture of N2O4 and NO2 resulting from the reaction occupies 36.0 liters at a total pressure of 773 mmHg and 45 °C. A. Let x equal the moles of N2O4 that

    asked on August 4, 2011
  6. Physics

    A box of books weighing 303 N moves with a constant velocity across the floor when it is pushed with a force of 400 N exerted down-ward at an angle of 38.6 degrees below the horizontal. Find ìk between the box and the floor. Well I know that I have to use

    asked on October 13, 2011
  7. Physics

    You are riding on a flatbed truck moving at 50 kilometers per hour. You have two identical guns, one aimed forward and one aimed backward, and you fire them at the same time. According to an observer in the ground, 1. the backward bullet appears to move

    asked on October 27, 2011
  8. math

    The product of two rational numbers is -28/81 if one number is 14/ 27 find the other

    asked on July 8, 2015
  9. math

    Yasmin wants to serve 150ml of juice to each of 15 guests. How many 500ml cartons of juice she buy? How much juice will she be left after serving her guests?

    asked on September 22, 2014
  10. chemistry

    when x gram of carbon is completely burnt in certain amount of oxygen y gram of carbondioxide is form.what mass of Co2 will be produced when 2x gram of carbon is burnt in z gram of oxygen. which law of chemistry will help me to find the answer

    asked on November 6, 2014
  11. Chemistry

    What type of isomers are [Pt(NH3)2Br2]Cl2 and [Pt(NH3)2BrCl]BrCl? A. Structural B. Geometric C. Linkage D. Coordination E. Optical

    asked on July 27, 2011
  12. Chemistry

    Determine the mass of CuSO4.5H20 needed to make 100.00mL of a .100M CuSO4.5H20 aqueous solution..

    asked on February 2, 2012
  13. Chemistry

    Rank the following solutions in order of increasing acidity. 1 M phenol 1 M boric acid 1 M cyanic acid 1 M formic acid 1 M hydrochloric acid 2. Rank the following solutions in order of increasing basicity. 1 M C3H5O3Na 1 M KF 1 M KOCN 1 M KOCl All I know

    asked on October 23, 2011
  14. physics

    A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.

    asked on September 13, 2011
  15. physics

    A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.???

    asked on September 13, 2011
  16. physic

    a cold drink bottle of 500 ml weight 25g .when a liquid is filled in it ,it weight 80g .find the density of liquid .

    asked on October 19, 2016
  17. math

    the cost price of16 books is equal to the selling price of 30 books.Find the gain%?

    asked on January 12, 2019
  18. chemisry

    Q2. Distinguish between the following- 1. CH3OH and C2H5OH 2. Phenol and methanol 3. 1-Propanol and 2-Methyl-2-propanol 4. Ethenol and 1-propanol 5. Propanol and propanone 6. Acetaldehyde and benzaldehyde 7. Benzaldehyde and benzoic acid 8. Propanoyl

    asked on July 7, 2013
  19. math

    a retangular field measures 400m by 100m and a square field 200m by 200m A -do the two fields have the same area? B - which field requires more fencing and by how much?

    asked on October 24, 2018
  20. Chemistry

    The iodide ion can be oxidized in an acidic solution by hydrogen peroxide. One proposed mechanism for the reaction is as follows: Step 1: H2O2 (aq) + I-(aq) → H2O (l) + OI-(aq) slow Step 2: H+(aq) + OI-(aq) → HOI(aq) fast Step 3: HOI (aq) + H+(aq) +

    asked on November 13, 2011
  21. AP Chemistry

    2 Al + 3 Cu(NO3)2 --> 2 Al(NO3)3 + 3 Cu 1. Write balanced equations for the oxidation and reduction half-reactions. Identify each half-reaction as oxidation or reduction. 2. In the balanced overall reaction, determine which is the oxidation and reduction

    asked on June 24, 2011
  22. science

    how does a hurricane form?

    asked on October 20, 2008
  23. maths

    Solve and verify 7/x+35=1/10

    asked on July 8, 2015
  24. Chemistry

    2 NO + O2 --> 2 NO2 The reaction rate is increased five­fold when the temperature is  increased from 1400 K to 1500 K. What is the activation energy for the reaction?  I have no idea how to do this and would greatly appreciate some

    asked on November 16, 2011
  25. maths

    If a= 2cosx+ isinx and b = 2cosy +isiny then prove that a+b = 2cos(x-y)(cos(x+y)+isin(x+y))

    asked on September 30, 2017
  26. maths

    Abcd is a rectangle with

    asked on July 8, 2015
  27. Chemistry

    2NaF + CaCl2 ¨ CaF2 + 2NaCl An excess of 0.20 M NaF is used to precipitate the calcium ions from a 50.0 mL sample of a calcium chloride solution. What is the concentration of the original calcium chloride solution?

    asked on July 10, 2011
  28. math

    A man travels 12km towards west then 3 km towards south and then 8 km towards east. How far is he from the Start?

    asked on August 7, 2018
  29. Science

    The mass of sodium carbonate required to prepare 250ml of 0.4N solution is

    asked on June 8, 2017
  30. mathematics


    asked on August 1, 2016
  31. math

    Shreya walks 2/3 km to her school and rosy walk 3/4 km to the school who has to walk a longer distance to reach the school and by how much

    asked on July 5, 2015
  32. chemistry

    What is the largest amount of H2O in grams that can be formed when 5.70 g of H2 reacts with 5.70 g of O2, based on the balanced reaction below. 2 H2 + O2 2 H2O

    asked on November 26, 2011
  33. chemistry

    A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a constant mass is reached. The mass of anhydrous CaSO4 is 1.577g. what is percent by mas of water in the hydrated calcium sulfate

    asked on February 9, 2010
  34. Physics

    Determine Centripetal Acceleration acting on the person standing at the equator? (the radius of earth is given)

    asked on November 2, 2014
  35. math

    find the volume of cube,one face of which has an area of 64 m square

    asked on July 14, 2012
  36. numericals

    A 100g bullet is firred from a 10 kg gun with a speed of 1000 m/s.What is the speed of recoil of the gun.

    asked on September 12, 2011
  37. math

    The capacity of a rectangular tank is 5.2cubic metre and area of its base is 2.6×1000 square centimetres.find its height

    asked on December 3, 2017
  38. Physics

    An airplane has an airspeed of 770 kilometers per hour at a bearing of N 48 degrees E. If the wind velocity is 28 kilometers per hour from the west, find the angle representing the bearing for the ground speed? I found Rx and Ry which are 543.23 and 572.22

    asked on September 3, 2014

    can someone read my english essay and correct it for me?

    asked on August 28, 2014
  40. math 12

    A)a shed, in the shape of a square based prism, is to have volume 800meters cubed. determin the dimentions of the shed, with the minimum surface area. B)how would the answer change if the minimum surface area did not include the bottem of the shed?

    asked on September 14, 2012
  41. Physics

    A high diver of mass 69.4 kg jumps off a board 9.6 m above the water. The acceleration of gravity is 9.8 m/s2.If his downward motion is stopped 2.21 s after he enters the water, what average upward force did the water exert on him? Answer in units of N

    asked on October 15, 2011
  42. Chemistry

    Nitrogen and hydrogen, with volumes of 12.0 L each, are injected into a sealed rigid reaction chamber containing a catalyst. The pressure of the chamber is 8.00 atmospheres and at a known temperature. The reaction is allowed to proceed to completion while

    asked on August 10, 2011
  43. Chemistry

    You want to determine the molar heat of solution of sodium chloride using a 10.0 g sample of NaCl(aq) and 50.0 mL of water in a coffee cup calorimeter. Which of the following equations would you use? Assume the specific heat of the solution is the same as

    asked on July 14, 2011
  44. science

    suppose your mom is boiling water near the window where did the mist came from and why was there mist on the window

    asked on January 21, 2009
  45. Science

    A cyclist move 4km in the east diraction then he turn to north and move 3km . Find displacement.

    asked on June 23, 2017
  46. math

    A park is in the form of a rectangle 100 m×80 mat. At the centre of the park there is a circular lawn. The area of the park excluding the lawn is 4150 m^2 find the radius of the circular lawn

    asked on June 7, 2016
  47. math

    a body is projected at an elevation alpha with a velocity of 9.8m/s in what time Wii be direction of motion be alpha/2?

    asked on May 7, 2016
  48. physics

    A river flow of width 100 m is flowing with velocity of 1.5 m/s .A man start from one end with rest relative to river .He raws with an acceleration of 2 m/s^2 relative to the river if the man want to cross river in minimum time by how much distance will he

    asked on April 13, 2016
  49. Stats/Probability

    If 23% of the cars that pass by your house each day are red, 12% green, 4% yellow, and 31% black; what is the probability the next car to pass your house will be red or yellow? (Assume every car is only a single color). I have to pick which formula to use.

    asked on February 20, 2016
  50. Chemistry

    Which of the following substances exist(s) as a resonance hybrid? CO2 (g) SO3 (g) HCO2- (aq) A. I only B. II only C. III only D. I and II only E. II and III only Ans w/i 12 hrs please!!

    asked on August 11, 2011
  51. Chemistry

    For each compound, draw a line structural diagram of all isomers. Identify the kind(s) of isomers illustrated. A. CH3CH=CHCH3 B. C3H7OH C. CHIFCl

    asked on July 27, 2011
  52. Science

    1. I got a list of solutions. We did a test in the lab to figure out what was there pH. How do you figure out which one is the most acidic and the most basic? 2.When might you need to know whether a solution is acidic or basic? 3. Dishwasher detergent,

    asked on January 17, 2011
  53. PreCalc

    A contractor plans to build an artist's studio with a roof that slopes differently on the 2 sides. On one side, the roof makes an angle of 33 degrees with the horizontal. On the other side, which has a window, the roof makes an angle of 65 degrees with the

    asked on January 3, 2011
  54. 11th grade

    i need a written example of an article.

    asked on November 2, 2008
  55. science

    what is pluto called? i think it is a star is that correct. im doingit for extra credit. and why do they call it stars

    asked on October 27, 2008
  56. physics

    What is the value of current when charge of 5 uc paases through a conductor in 2seconds

    asked on May 22, 2015
  57. proposal writing for high school english

    how to write a proposal in brief for a 10 marks question? What structure should be followed for just 10 marks?

    asked on September 30, 2013
  58. Math

    When doing translation you have to write for example A(1,1) then when you write it you write A'(2,2) how would you write it to the fourth. Would you tally or do Roman numerals

    asked on December 10, 2012
  59. college physics

    the question is that what happened when the ozone layer becomes destroyed?

    asked on September 18, 2009
  60. Math

    wat r the factors for 125-50-54 and 48?

    asked on December 11, 2008
  61. english

    which are nouns? Readers admire his knowledge and his daring.

    asked on October 6, 2008
  62. s.g (math)

    if a triangle with sides 12 unit and 5 unit is inscribed in a circle with BC as diameter, then find the value of sin square theta +cos square theta -1

    asked on September 10, 2016
  63. real analysis

    Arbitrary union of closed set is closed Prove or disprove

    asked on August 27, 2016
  64. real analysis

    Closure of the set of irrational number is phi

    asked on August 27, 2016
  65. math

    Roger buys six 1.5- litre bottles of fresh juice. he distributes 20 cl of juice to each of his pupils. calculate the number of pupils in his class if 600 ml is left.

    asked on May 2, 2016
  66. math

    In a test which had 30 questions carrying 1 mark each ajay scored 60persant marks. How many questions did he answered correctly

    asked on December 8, 2015
  67. science

    How food travels through various compartments

    asked on July 17, 2015
  68. math

    What should be added to (2/3+3/5) to get -2/15

    asked on July 8, 2015
  69. math

    Evaluate 6/7-2+-7/9+19/21

    asked on July 8, 2015
  70. maths

    Solve : 1/x+1+1/x+2= 2/x+10

    asked on July 8, 2015
  71. Maths

    A hand fan is made by stitching 6 equal size triangular strips of two different types. The dimensions of equal strips are 25cm, 25 cm and 14 cm.Find the area of each type of paper needed to make the hand fan.

    asked on June 18, 2015
  72. Physics

    An ant climbs onto the side of a bicycle tire a distance of 40.0 m from the hub. If the 0.010 g ant can hold onto the tire with a force of 4.34*10 to the -4, at what frequency would the tire fling the ant of assuming the wheel is spun on a horizontal

    asked on November 2, 2014
  73. science

    an aircraft travelling at 600km/hr accelerates steadily at 10 km /h every second. Assuming speed of sound is 100 km /h t the aircrafts altitude , how long will it take to reach the sound barrier

    asked on April 23, 2014
  74. Math

    determine the value of k for which the fuction f(x)=4x^2-3x+2kx+1 has 2 zeros.

    asked on October 21, 2012
  75. math g 11

    the kwans will need $50,000 in 3years to expand their business. what is the equivalent value today if inflation is projected to be approx 3.5% per year compounded anualy

    asked on May 15, 2012
  76. grade 11 math

    at giant tv sales, you can chose between 2 payments options for a new tv. 1st option is 2 pay $2399.99. 2nd option is to pay a $399.99 downpayment plus $2200.00 after one year. if interset is 4.2% per year, compunded quarterly, wich option is a better deal

    asked on May 15, 2012
  77. Chemistry

    What you can predict about a reaction whose activation energy is zero?

    asked on February 6, 2012
  78. Chemistry

    On the basis of MOT, explain why the stability of N2 decreases on ionization but the inverse is true for O2.

    asked on February 6, 2012
  79. Chemistry

    Why Energy of is smaller than π2px and π2py in case of O2 but it is opposite in case of N2.

    asked on February 6, 2012
  80. physics

    the magnitude of 2 vectors are 4 and 5 units and the angle b/w them is 30,taking first vectoron x-axis.find the magnitudeof resultant vectorand its direction?

    asked on November 24, 2011
  81. maths

    The mean of 10 observations is 21. If each score is divided by 3, find the new mean.

    asked on March 17, 2010
  82. social studies

    Between 1935 and 1957, a period that included World War II, the birth rate rose from 16.9 to 25 per 1000 people. What was the most likely cause of this "baby boom?"

    asked on January 6, 2010
  83. religion

    When jesus took the _________ one of the soilders took a lance or a sword and pierced his side.

    asked on March 4, 2009
  84. science

    suppose your mom is boiling water near the window where did the mist came from and why was tehre mist on the window

    asked on January 21, 2009
  85. math

    which store is cheaper kroger or meijers?

    asked on October 31, 2008
  86. 6th grade

    do people live in mars?

    asked on October 29, 2008
  87. science

    do people live in mars?

    asked on October 29, 2008
  88. science

    do people live in mars?

    asked on October 29, 2008
  89. social studies


    asked on October 7, 2008
  90. english

    which are nouns? This experienced adventurer loved to climb mountains.

    asked on October 6, 2008
  91. science

    what is the full name of RDF?

    asked on June 9, 2008
  1. math

    I love the way they are solving

    posted on April 16, 2019
  2. math


    posted on January 12, 2019
  3. math

    give me answer

    posted on October 24, 2018
  4. the length of a rectangular plate is measured by a


    posted on July 15, 2018
  5. math


    posted on January 7, 2018
  6. Science

    how the N becomes 85 in first ?

    posted on November 27, 2017
  7. geometry

    please some one can tell the answer of this question please

    posted on November 14, 2017
  8. maths

    Very check Kruger jerk i

    posted on October 23, 2017
  9. Organic Chemistry


    posted on October 6, 2017