Friday

January 30, 2015

January 30, 2015

Total # Posts: 21

**chemistry**

500g urea aq. Sol. Has mole fraction 0.2 what is molality of sol.
*October 29, 2014*

**math**

Bella keeps a supply of red, blue, and black pens in a drawer. The drawer has 17 red pens, 18 blue pens, and 11 black pens. If Bella wants a red pen, what is the minimum number of pens she has to pull out from the drawer to make sure she gets a red pen?
*October 15, 2013*

**Maths Calculus**

We want to build a rectangular cardboard box with no top and of given volume V using the least quantity of cardboard. Find the length of the box's edges by fnding the minimum of the total surface function. Verify that the point you found is indeed a minimum applying the ...
*April 25, 2013*

**Chemistry**

The differnece in the mass of 100 moles of each sodium atoms and sodium ions is 5.48002 g. Compute the mass of an electron.
*December 15, 2012*

**science**

how much work is done in bringing three electrons , which are intially a great disance apart to how fats will it be moving then it is at distance ?
*July 19, 2012*

**science **

an electorn is 20 ccom away from a fixed point charge , q =-0.250uc . if it starst to move from rest , then how fast will it be moving when it is a t distance ?
*July 19, 2012*

**PHYSICS**

7809.5 cm3
*February 10, 2012*

**PHYSICS**

The density of ice is 0.92 g cm-3 & that of sea water is 1.025 g cm-3.Find total volume of an iceberg which floats with its volume 800 cm3 above water. ANSWER:7809.5 cm3
*February 10, 2012*

**PHYSICS**

The density of ice is 0.92g cm-3 & that of sea water is 1.025g cm-3.Find the total volume of an iceberg which floats with its volume 800cm3 above water? ANSWER:7809.5cm3
*February 10, 2012*

**PHYSICS**

A wooden cube of side10cm has 700g.What part of it remains above the water surface while floating om water?
*February 10, 2012*

**maths**

AB=5cm , Angel B= 60 degree , Altitude cd= 4cm (Circle)
*January 2, 2011*

**arithmetic**

What is the use of arithmetic progression in a circular race track? Please answer soon !
*December 21, 2010*

**math**

There r 12 months in 1 year .Therefore using unitary method 12*7 = 84 months in 7 years Also 1/2 year means 6 months .Thus total of 84+6 = 90 months in 7& 1/2 years
*February 24, 2010*

**maths**

(x/25)+6 =18 x =12*25
*February 21, 2010*

**physics**

when any block slides down a smooth incline which is unfixed then the incline moves back.WHY??
*February 21, 2010*

**maths**

least number between the given range =36; to find the maximum no. divide 395 by 6 ;we get remainder to be 5 ;Therefore 395-5 will purely divided by 6 and also be the maximum no. in the given range Also total nos.:390=36+(n-1)6 calculate for n ; then apply 36+42+......+390=n/2(...
*February 21, 2010*

**Math**

slope of the line will be same to that of the given line i.e. 3 Now let the eq. be y -3x = m (where m is any parameter) this line passes through (5,1) therfore satisfying it we get m = -14 thus, eq. of required line is y =3x -14
*February 20, 2010*

**maths**

The sum of the co-efficients in the expansion of (1 - 2x +5x^2)^n is a and the sum of the co-efficients in the expansion of (1 +x)^2n is b.Then (A) a=b (B) (x-a)^2 + (x-b)^2 =0 (C) (sin a)^2 + (cos b)^2 =1 (D) ab=1 Ans. A,B,C But How???
*February 19, 2010*

**chemistry**

I want to have a deep insigth to my problem i.e. I know that bonds between atoms(of different or same elements)to be formed are based on no. of electrons less in octet or duplet(say O2, each O atom has two electrons less in octet thus forms two bonds).But why bonds between e...
*February 10, 2010*

**chemistry**

Q.1 Calculate the extent of hydrolysis of 0.005M K2CrO4.If K2=5*10^-7 for H2CrO4.(It is essentially strong for first ionisation).
*January 8, 2010*

**democratic politics 10th grade cbse**

1.produce decisions taking a lot of time 2. not free from corruption 3. money and muscle power have an influence on politics. 4. criminal connections also a demerit of democracy
*December 23, 2008*

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