Saturday
December 3, 2016

Posts by rohit

Total # Posts: 99

Chemistry
If 152 grams of ethane (C2H6) are reacted with 231 grams of oxygen gas, what is the excess reactant? 2C2H6 + 7O2(g) → 4CO2(g) + 6H2O(g)
August 8, 2016

physics
4N force applied on a body mass 20kg then calculate work done in 3sec?
July 3, 2016

maths
write numeral for thirty seven crore thirteen thousand nine hundred forty eight
June 17, 2016

science
Suggest an experiment to compare the conductivity of electricity by iron, copper, aluminium and zinc. Perform the experiment and prepare a short report on the resu
June 15, 2016

Math
A cylinder of curved surface area 1250m² is formed from a rectangular metallic sheet .Find the dimensions of the rectangular sheet I its length is double its breadth?
June 9, 2016

maths
Sorry I don't know
May 15, 2016

maths
Divide 54 into two parts such that one part is 2/7 find the other
May 15, 2016

chemistry
what increasing order of dipole moment among nitrobenzene methylbenzene phenol and toluene
April 6, 2016

Chemistry
Calculate the standard internal energy change for the formation of water at 298K. The standard enthalpy of formation of water at 298K is - 285.8 KJ/mol.
March 25, 2016

science
When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........
March 14, 2016

physics
When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........
March 14, 2016

math
The ratio of boys and girls in a class is 5:3 if 20 % of the boys and 60 % of girls have passed in first class what percentage of the class is in first class?
February 16, 2016

math
in a Quadrilateral ABCD, AB=AD and CB=CD. Prove that- (1) AC bisects angle BAD (2) AC is perpendicular bisector of BD
December 25, 2015

math
The sum of interior angels and the sum of exterior angles of polygon are in the ratio 9:2.find the sides of regular polygon.
December 18, 2015

Spga
if the angle of elevation of the sun is change from 45° to 60° then the length of shadow of the pole is deceased by 10 cm then height of the pole is
December 2, 2015

maths
Score of Janet in Maths is 25 more than two-third of her score in English. If she scores x marks in English, what is her score in Maths ?
November 29, 2015

maths
there are 20 apples and 15 oranges in a bin.if some apples are removed from the bin so that the probability of randomly drawing an apple becomes 2/5.how many apples must be removed from the bin
November 16, 2015

Physics
A turn of radius 20m is banked for the vehicle going at a speed of 36km/h. If the coefficient of static friction between the road and the tyres is 0.4, what are the possible speeds of a vehicke so that it neither slip down nor skids up?
August 13, 2015

math
draw a square on the graph paper whose each side of the length 5 centimetre and then make partition of the square into 25 small squares as soon in figure 1.1 each square is small square have its height and length 1 centimetre
July 23, 2015

math
May 8, 2015

math
Two trains are on the same track a distance 100 km apart heading towards one another, each at a speed of 50 km/h. A fly starting out at the front of one train, flies towards the other at a speed of 75 km/h. Upon reaching the other train, the fly turns around and continues ...
December 7, 2014

geometry
Two circles which are not congruent touch externally. the sum of their area is 130¦Ðcm.square and distance between their centers is 14 cm. find radii of circles.
September 28, 2014

geometry
triangle ABC have angle ABC 90 degree. therefore the triangle ABC is right angled triangle. Therefore, In triangle ABC, by phyathagoras theorem, AC ¡Á AC =AB¡ÁAB BC ¡ÁBC AC ¡Á AC = 5¡Á5 12¡Á12 = 25 ...
September 28, 2014

PHYSICS
hey have u got this@Anonymous
November 8, 2013

math
a+boundary+wall+of+your+house+is+divided+in+to+10+vertical+strips+of+equal+width+you+painted+4+strips+of+wall+with+pink+3+with+yellow+and+3+strips+with+green+paint+find+the+percentage+area+of+wall+painted+with+pink+colour
October 27, 2013

essay compition
the rights and responsibilits of citizens
October 20, 2013

Chemistry
A reference solution is to be prepared with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is (A) 252 mg (B) 25.2 mg (C) 5 mg (D) 252 g
June 25, 2013

math
June 15, 2013

as we have to chose positive odd integers sp we cant choose maximum big numbers close to 1 its choose w=3 x=3 then y=5 z=7 then answer is minimum is 1/45 or 1+45=46
June 14, 2013

pls heeelp math
answer is 6/11 or 11+6= 17
June 7, 2013

maths
Determine 208/207+208/207×206/205+208/207×206/205×204/203+…
June 5, 2013

maths
Find the smallest number N such that: The number of divisors of N is A. The number of divisors of A is B. The number of divisors of B is C. The number of divisors of C is 3.
June 5, 2013

maths
419.....go and get points
June 4, 2013

Geometry and combiantorics.
yes randy morico is correct
June 3, 2013

maths
How many functions f from the reals to the reals are there, such that f(f(x))=x^2−2? Details and assumptions f need not be a polynomial. f need not even be continuous.
May 21, 2013

maths
How many positive integers n are there such that 10^n≤n^10?
May 16, 2013

maths
What is the smallest positive integer with exactly 12 (positive) divisors?
May 16, 2013

algebra
can u explain how?
May 13, 2013

physics
Earthquakes are motions of the earth's crust. Essentially, they are big sound waves that travel through the earth. There are two types of waves. The first type is called a longitudinal or P wave, where the earth compresses in the same direction as the wave travels. The ...
May 9, 2013

Physics
thank you
May 6, 2013

math
As θ ranges over all real values, what is the maximum value of (14sinθ+5cosθ)^2
May 3, 2013

maths
On children's day, a teacher brought 63 erasers and 147 sweets to distribute out completely to her class. Each student receives the same number of erasers as each other, and the same number of sweets as each other. What is the most number of students in the class? Details ...
April 18, 2013

April 16, 2013

maths
As x,y,z ranges over all possible real numbers, what is the minimum value of 3x^2+12y^2+27z^2−4xy−12yz−6xz−8y−24z+100?
April 13, 2013

maths
Find the number of positive integers <1000 that can be expressed as 2^k−2^m, where k and m are non-negative integers.
April 12, 2013

maths
What is the sum of all integer values of n such that 3n+15/(n−1)(n−5) is also an integer
April 10, 2013

maths
Suppose z=a+bi, where a and b are integers and i is the imaginary unit. We are given that |1+iz|=|1−iz| and |z−(13+15i)|<17. Find the largest possible value of a+b. Details and assumptions i is the imaginary unit, where i^2=−1.
April 3, 2013

physics
thankyou
April 1, 2013

physics
You and your friend, both of mass 70 kg, are playing catch with a frisbee on frictionless ice. Initially, you are both at rest. You throw a 0.175 kg frisbee at 10 m/s horizontally at your friend, who catches it. After they catch the frisbee, what is the relative velocity ...
April 1, 2013

maths
The probability that Katarina will correctly solve a given Brilliant math problem is 1/8. The probability that Layla will solve the same problem correctly is 1/12. The probability that they will give the same incorrect numerical result is 1/1001. Suppose Katarina and Layla ...
April 1, 2013

maths
Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as ab where a and b are coprime positive integers. What is the probability of a+b?
April 1, 2013

maths
x,y and z are positive reals. What is the maximum value of ((x+y+z)^3−x^3−y^3−z^3)^2/(x^2+y^2+z^2)^3−x^6−y^6−z^6
April 1, 2013

maths
Let f(x)=x^2−1. How many distinct real roots are there to f(f(f(x)))=0?
April 1, 2013

maths
What is the largest possible integer that can be chosen as one of five distinct positive integers whose average is 10? Details and assumptions The elements of a set are distinct, if no two of them are the same.
April 1, 2013

physics
A current I=1A flows along a thin-walled cylinder of radius R=4cm. What pressure in Pascals do the walls of the cylinder experience? Assume that the current is uniformly distributed. Bonus thing to think about: Is this pressure directed inwards or outwards?
March 30, 2013

physics
Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of the magnetic field B in Teslas at a point P located 6-cm away from the axis of one of the wires and 8-cm away from the axis of the other wire? Unot=...
March 30, 2013

maths
ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?
March 30, 2013

physics
It should be 0.009
March 22, 2013

maths
March 22, 2013

maths
What is the smallest positive common difference of a 6-term arithmetic progression consisting entirely of (positive) prime numbers?
March 21, 2013

physics
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2?
March 21, 2013

calculus
A moving dot P departs from O at an initial speed of 6 m/s in the east direction and accelerates at 2 m/s^2 in the east direction. 2 seconds after P's departure, dot Q departs from O to chase down P at a constant speed of k m/s in the east direction. What is the minimum ...
March 21, 2013

calculus
What is the slope of the line tangent to the quadratic f(x)=4x^2−3x+6 at x=7?
March 21, 2013

maths
How many integers appear in both of the following arithmetic progressions: A1:2,9,16,……,2+(1000−1)×7 A2:3,12,…,21,…,3+(1000−1)×9 Details and assumptions Since 2 appears in A1 but not in A2, it does not appear in both of the ...
March 21, 2013

maths
Find the sum of all 3-digit positive numbers N that satisfy the condition that the digit sum of N is 3 times the digit sum of N+3. Details and assumptions The digit sum of a number is the sum of all its digits. For example, 1123 has a digit sum of 1+1+2+3=7. The number 12=012 ...
March 21, 2013

geometry help!!
thank you
March 13, 2013

Dynamics
A car travels around a horizontal circular track of radius 45m.If the car increases its speed at a constant rate of 1.2m/s2 starting from rest, determine the time needed for it to reach an acceleration of 1.4m/s2. What is its speed at this instant?
August 6, 2012

math
underoot 2x square +3x + underoot 2 by alpha into beta method.
May 3, 2012

math
if x3+ax2-bx+10 is divisible by x2-3x+2 .find the value of a and b
April 15, 2012

Maths
Find the radius of a right circular cyilender whose volume is 3080cu.cm and height is 20cm.
February 3, 2012

physics
the two charges of magnitude 1rc and 2rc are separated by 10cm from each other at what point on the line joining the two charges is the electric field strength zero?
May 11, 2011

dav
determine the concentrated of mohrs salt solution with the help of supplied n/10 kmno4 solution preparred?
May 4, 2011

Maths
'a' and 'b'are integers and (a, b) = 2. Solve the following two equations: (a+b)^2 = 25a 18(a^4) + (b^4) = 41a(b^2) Can't get it, help please?
January 4, 2011

pre algebra
Let steve = x, therefore ramon = 3x x + 3x = 104 4x = 104 x = 26 Therefore steve earned \$26 Ramon = 3 * 26 = \$78
January 4, 2011

algebra
a) 7m + 36 = 11m -4m = -36 m = 9 b) 2x + 4 = 10x - 4 -8x = -8 x = 1 c) 11w - 8 = 22 - w 12w = 30 w = 5/2 d) 6a - 12 - a = 9a + 53 + a 5a - 12 = 10a + 53 -5a = 65 a = -13
January 4, 2011

Math
integrate (sin^8 x - cos^8 x)/(1 - 2sin^2 x * cos^2 x) w.r.t. x
January 2, 2011

Math
evaluate r. if12Pr=1320
June 3, 2010

Math
evaluate r. 12Pr=1320
June 3, 2010

grammar
D.R MAN MOHAN SING IS THE PRIME OF INDIA
May 27, 2010

algebra II
First, you know the formula is a^2 + b^2 = c^2. Next, substitute the values: a^2 + 1^2 = root 10 ^2 Do the operations. a^2 + 1 = 10 Now= a^2 = 10-1 a^2 = 9 a = 3
April 15, 2010

4 hundreds 3 tens 3 ones= 433 4 hundreds 3 tens 5 ones= 435 Count with me. 433, ..., 435 ANS: 434
April 12, 2010

computers
what computers can do?what computers cannot do?what are the advantages and disadvantages of computers?what are the roles of computer in the society?
October 24, 2008

scince maths
1- What volume of hydrogen gas at 273 K and 1 atm pressure will consumed in obtaining 2.16 gm of elemental born(atomic mass=10.8)from the reduction of born trichloride by hydrogen: A- 44.8 lit B-22.4 lit C- 89.6 lit D-67.2 lit
May 27, 2008

astronomy
The parallax of the red giant Betelguese is just barely measurable and has a value of about 0.005 arc seconds. What is its distance? Suppose the measurement is in error by + or -0.003 arc seconds. What limits can you set on its distance? 1/0.005 = 200 parsecs. Convert that to ...
April 30, 2007

astronomy
Arcturus is about half as hot as the Sun but is about 100 times more luminous. What is its radius campared to the sun. If Arcturus is half as hot, it radiates (1/2)^4 = 1/16 as much as the sun PER UNIT AREA. But since it radiates 100 times more totally, it must have 1600 times...
April 30, 2007

astronomy
The parallax of the red giant Betelguese is just barely measurable and has a value of about 0.005 arc seconds. What is its distance? Suppose the measurement is in error by + or -0.003 arc seconds. What limits can you set on its distance?
April 27, 2007

astronomy
Arcturus is about half as hot as the Sun but is about 100 times more luminous. What is its radius campared to the sun.
April 27, 2007

Economics
what it meant by equilibrium in economics?how equilibirum attained? The following site has an ok defintion. (I cannot post the site: instead google economics, equilibrium, definition) Market equilibrium occurs when buyers and sellers, each acting in their own best interest, ...
April 26, 2007

science
Which of the following is a example of a irriversible change. a)Disssolve salt in water b)Freezing water C)Mixing water-colour Which do you think you can't separate? Can you separate salt after it is dissolved in water? I think I could evaporate the water and leave the ...
April 21, 2007

PHYSICS
hf=Hi + Vsin45*t - 4.9 t^2 (v sin 45)t = 1.05 + 4.905 t^2 ___ (1) (v cos 45)t = 10 ___ (2) (2)/(1): 10 tan 45 = 1.05 + 4.905 t^2 Solve for t, t = 1.35 s Substitute t in (2), (v cos 45)1.35 = 10 v = 10.47 m s^-1
November 1, 2006

geography
are alps bigger or mountains?or wat's the difference between them? Alps are mountains in one specific geographic region. It is a historic name, there is no difference between the geography of "alps" and "mountains". need a definition of tall grass in ...
October 29, 2006

geography
whr do cattles and sheep live like in high altitudes or middle or low altitudes? Cattle need food, water, and a temperature range that does not cook, nor freeze them. So if you choose to examine an altitude, check to see if those are available. If so, cattle and sheep can ...
October 29, 2006

Math
Proove that half of 9 is 4...i know the answer i am just chking whether u all know the answer or not..;P if u cut IX in halves(horizontally)...u'll get IV n=56 if n=11
October 4, 2006

Math quiz
Proof that half of 9 is 4.. uhm..it's proove instead of proof need a clue?
September 27, 2006

1. Pages:
2. 1