ravi
Most popular questions and responses by ravi
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 
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 
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 
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 
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 
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 
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 merrygoround, which has a radius of 12 ft.
asked on November 7, 2012 
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 70kg block, as shown in the figure. Find the acceleration of the block, assuming that the
asked on November 7, 2012 
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 
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 
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 
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 
msths
Solve z/3 = 5/4
asked on January 27, 2013 
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 
Math
x2+y2+z2x(al1+bl2+cl3)y(am1+bm2+cm3)z(an1+bn2+cn3)=0 solve this equation
asked on October 25, 2017 
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 
MATH
THE HOSTEL OF AN ENGINEERING INSTITUTE HAS 320 STUDENTS AND THE FOOD STOCK FOR 80 DAYS. IF 20 STUDENTS LEAVE THE HOSTEL AFTER 20 DAYS,FOR HOW MANY MORE DAYS WILL THE FOOD LAST?
asked on February 26, 2012 
physics
Why standing waves are called standing?
asked on December 2, 2011 
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 
maths
the net of acuboid measuring Xcm *8 cm *4 cm. the length are 25cm calculate length Xcm.
asked on August 11, 2016 
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 
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 
math
Find the greatest number of three digits that can be exactly divided by 75,45 and 60
asked on September 11, 2015 
BTech 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 
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 
geometry
the adjacent angle of parallelogramare in the ratio of 2:3 find themeasure of all the angles
asked on March 7, 2012 
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 
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 
Trigonometry half angles
Tan75/2 ka solution dena sir lekin vistar se
asked on August 15, 2017 
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 
physics
What is the difference b/w longitudinal wave and transverse wave ?
asked on June 21, 2014 
math
if sum of two numbers is c and their quotient is p/q then find number.
asked on June 8, 2014 
Quantum Computing
Suppose Hψ> = 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 
Quantum Computing
Suppose we have ϕ⟩=∑y∈{0,1}nβyy⟩ such that βy=0 if s⋅y=1mod2 and βy=12(n−1)/2 if s⋅y=0mod2, where s is some hidden nbit string. Assume that s is not the allzero string 00⋯0. (a) If we run Fourier sampling on ϕ⟩, what is the
asked on September 4, 2013 
shbhvghs
What is the direction of the total electric field at any point on the axis where
asked on February 26, 2013 
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 
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 
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 
business economics
how business economics helps business manager in decision making
asked on October 16, 2010

arithmetic
All well
posted on February 13, 2019 
arithmetic
Your is nice it helps me a lot
posted on February 13, 2019 
Physics
Sqroot74 =ans
posted on June 22, 2018 
Physics
ha ha scott great knowledge of error
posted on June 22, 2018 
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 
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 
physics
2sinecos
posted on August 4, 2016 
math
x=12
posted on August 30, 2015 
math
length=23 and width=19
posted on August 30, 2015 
8th grade Math
Estimate the square root of 72 how to find it
posted on August 19, 2015 
mathdata management
no
posted on September 3, 2014 
chemistry
What is the normality of 1 M H3PO4 solution?
posted on August 24, 2014 
Math (Probability)
you all ***** .......... giving wrong answer ..
posted on May 11, 2013 
MATH
64 DAYS
posted on February 26, 2012 
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 
Math
Take 1st equation 2m3pn=0 Take 2nd equation 2m5pn=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 
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