Most popular questions and responses by ravi
  1. Probability

    The random variables X and Y have a joint PDF of the form fX,Y(x,y)=c⋅exp{−12(4x2−8x+y2−6y+13)} E[X]= var(X)= E[Y]= var(Y)=

    asked on March 18, 2015
  2. Physics

    A coin is placed 26 CM from the center of a horizontal turnable intially at rest. The turnable begin to ratate. When the speed of coin is 120 CMS rotating at constant rate the coin just begin to slip the acceleration of gravity is 980 CM/S2. What is the

    asked on October 31, 2018
  3. statistics

    A company produces batteries whose lifetimes are normally distributed with a mean of 100 hours. It is known that 90% of the batteries last at least 40 hours. (i). Estimate the standard deviation lifetime. (3 marks) (ii). What percentage of batteries will

    asked on April 26, 2013
  4. science

    If 1,2,3,4 moles of H3po4, nah2po4, na2hpo4, and na3po4 are mixed in an aqueous solution.find the pH. Ka1=10^-3, Ka2=10^-7, ka3= 10^-13

    asked on March 30, 2014
  5. dynamics

    A train which is moving with uniform acceleration is observed to take 20 and 30 seconds to travel succesive 0.4km.how much far then will it travel before coming to rest, if the acceleration remains constant

    asked on January 18, 2017
  6. MATH

    Maria found 1 penny on Mon under her pillow, 2 on Tuesday and 4 on Wed. On Thurs, Fri, Sat and Sun she found double the amount she found under the pillow she found the day before. how much money does Maria have on Sunday?

    asked on March 22, 2010
  7. physics

    Determine the moment of inertia for three children weighing 57.0 lb, 42.0 lb and 78 lb sitting at different points on the edge of a rotating merry-go-round, which has a radius of 12 ft.

    asked on November 7, 2012
  8. physics

    A disk with a mass of 16 kg and a radius of 41 cm is mounted on a frictionless horizontal axle. A string is wound many times around the disk and then attached to a 70-kg block, as shown in the figure. Find the acceleration of the block, assuming that the

    asked on November 7, 2012
  9. Physics

    A model rocket has a mass of 3.00 kg. It is fired so that when it is 220 m above the ground it is travelling vertically upward at 165 m/s. At that point its fuel runs out so that the rest of its flight is without power. Assume that the effect of air

    asked on March 8, 2013
  10. Physics

    A train which is moving with uniform acceleration is observed to take 20 and 30 seconds to travel succesive 0.4km.how much far then will it travel before coming to rest, if the acceleration remains constant?

    asked on January 19, 2017
  11. science

    A train which is moving with uniform acceleration is observed to take 20 to 30 seconds to travel successive 0.4km.how much far then willing travel before coming to rest, if the acceleration remains uniform?

    asked on January 18, 2017
  12. Physics

    A net force of 5.75 * 103 N [180degree ] acts on a mass of 23.0 kg. If, while the force acts, the mass travels through a displacement of 360 m [210 degree ], what work did the net force do on the object? Into what form of energy was this work transferred?

    asked on March 8, 2013
  13. msths

    Solve z/3 = 5/4

    asked on January 27, 2013
  14. computer programming

    : Create a program like KBC game show where program ask user 3 different question one after another and the user should answer them. If the answer are correct then pop up the message as “you got the right answer” and must ask user does he/she wants to

    asked on January 21, 2012
  15. Math

    x2+y2+z2-x(al1+bl2+cl3)-y(am1+bm2+cm3)-z(an1+bn2+cn3)=0 solve this equation

    asked on October 25, 2017
  16. maths

    the area of trapezium is 276cm2 and its height is 24cm.if one of its parallel side is longer than other by 7cm.find the length of parallel side.

    asked on January 15, 2015
  17. MATH


    asked on February 26, 2012
  18. physics

    Why standing waves are called standing?

    asked on December 2, 2011
  19. survey of accounting

    1. A corporation issues $18,000,000 of 6% bonds to yield an effective interest rate of 7%. a) was the amount of cash received from the sale of the bonds more or less than $18,000,000? b) identify the following amounts related to the bond issue: 1) face

    asked on March 8, 2010
  20. maths

    the net of acuboid measuring Xcm *8 cm *4 cm. the length are 25cm calculate length Xcm.

    asked on August 11, 2016
  21. math

    area of trapezium is 267square mt.parallel sides are 6m and 30m non parallel sides is 2m less then other find the length of non parallel sides.find the length of non parallel side

    asked on April 9, 2016
  22. Science

    When an object and screen are separate d by 1m distance. when a convex lens is place d at 30 cm from the object it forms a clear image then the image distance is?

    asked on March 11, 2016
  23. math

    Find the greatest number of three digits that can be exactly divided by 75,45 and 60

    asked on September 11, 2015
  24. B-Tech mechanical

    At a point in a strained material the principal stresses are 60MPa and 40MPa. Find the position of the plane across which the resultant stress is most inclined to the normal and determine the value of this stress.

    asked on February 14, 2014
  25. math

    give me answer show that one and only one out of n,n+4,n+8,n+12 and n+16 is divisible by 5, where n is any positive integer

    asked on August 3, 2012
  26. geometry

    the adjacent angle of parallelogramare in the ratio of 2:3 find themeasure of all the angles

    asked on March 7, 2012
  27. rao's iit 6 class

    if sides of a triangle is in the ratio 2,3,4 and shotest side is 6cm then find perimeter of a triangle?

    asked on November 6, 2011
  28. meaning of Quotes

    Some body please tell me the meaning of "early to bed, early to rise...helps a girl to go with other guys"

    asked on April 17, 2010
  29. Trigonometry half angles

    Tan75/2 ka solution dena sir lekin vistar se

    asked on August 15, 2017
  30. Algebra

    An artist paints t shirts. It takes 15 mins to set up and 40 mins to clean up. Once it is set up it takes the artist 12 mins to paint the shirt. What would an equation be for how many shirts he makes in 127 mins?

    asked on May 7, 2015
  31. physics

    What is the difference b/w longitudinal wave and transverse wave ?

    asked on June 21, 2014
  32. math

    if sum of two numbers is c and their quotient is p/q then find number.

    asked on June 8, 2014
  33. Quantum Computing

    Suppose H|ψ> = 1/√2 (|000> + |111>). What is |ψ> ? Specify the probability amplitude for each component: |000> = |001> = |010> = |011> = |100> = |101> = |110> = |111> =

    asked on September 4, 2013
  34. Quantum Computing

    Suppose we have |ϕ⟩=∑y∈{0,1}nβy|y⟩ such that βy=0 if s⋅y=1mod2 and βy=12(n−1)/2 if s⋅y=0mod2, where s is some hidden n-bit string. Assume that s is not the all-zero string 00⋯0. (a) If we run Fourier sampling on |ϕ⟩, what is the

    asked on September 4, 2013
  35. shbhvghs

    What is the direction of the total electric field at any point on the axis where

    asked on February 26, 2013
  36. math

    a library was mistakenly charged sales tax on an order of children's books, the invoice, including 5% sales tax, was for $1323. how much should the library have been charge?

    asked on August 21, 2012
  37. Dav,science

    U find your mass to be 42 kg on weighing machine.is your mass more or less than 42 kg?explain

    asked on August 28, 2011
  38. english

    Assuming that you are a mirror' explain it is a man's best friend in his youth and worst enemy in one's old age

    asked on December 7, 2010
  39. business economics

    how business economics helps business manager in decision making

    asked on October 16, 2010
  1. arithmetic

    All well

    posted on February 13, 2019
  2. arithmetic

    Your is nice it helps me a lot

    posted on February 13, 2019
  3. Physics

    Sqroot74 =ans

    posted on June 22, 2018
  4. Physics

    ha ha scott great knowledge of error

    posted on June 22, 2018
  5. Physics

    answer is p=(24+_1.6) As p=vi take log both side and diffrentiate we get (^=delta) ^p/p=^v/v+^i/i ^p=maximum possible error in p ^v=0.1 v=6 ^i=0.2 i=4

    posted on June 22, 2018
  6. maths

    Let vertex is x Basa angles are 2x We know that Sum of angles in triangle is 180 X+2x+2x=180 5x= 180 X=36 Base angle=2(36) =72 Exterior angles = sum of interior angles =72+72 =144

    posted on March 20, 2017
  7. physics


    posted on August 4, 2016
  8. math


    posted on August 30, 2015
  9. math

    length=23 and width=19

    posted on August 30, 2015
  10. 8th grade Math

    Estimate the square root of 72 how to find it

    posted on August 19, 2015
  11. math-data management


    posted on September 3, 2014
  12. chemistry

    What is the normality of 1 M H3PO4 solution?

    posted on August 24, 2014
  13. Math (Probability)

    you all ***** .......... giving wrong answer ..

    posted on May 11, 2013
  14. MATH

    64 DAYS

    posted on February 26, 2012
  15. chemistry

    Light or visible light is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight.[1] Visible light has wavelength in a range from about 380 nanometres to about 740 nm, with a frequency range of about 405 THz

    posted on December 2, 2011
  16. Math

    Take 1st equation 2m-3p-n=0 Take 2nd equation 2m-5p-n=14 ---------- now exchnage signs of the 2nd equation and do adition with changed signs. 2m -3p -n= 0 2m -5p -n= 14 (-) (+) (+) (-) -------------------- 2p = -14 p = -7 value of p is -7

    posted on August 22, 2011
  17. math

    Take n=1 6^1+4 =>10 which is divisible by 5. 6^n+4 is divisible by 5 for all nEN. Take n= n+1 6^n+1 +4 => 6^n*6 +4 => 6[6^n +4] as 6^n+4 is divisible by 5 for all nEN 6*[multiples of 5] also divisible by 5 Hence 6^n+4 is divisible by 5 for all nEN.

    posted on August 22, 2011