# sanjay

Most popular questions and responses by sanjay-
## Chemistry

Which radioactive sample would contain the greatest remaining mass of the radioactive isotope after 10 years? A. 2.0 grams of 198 Au B. 2.0 grams of 42 K C. 4.0 grams of 32 P D. 4.0 grams of 60 Co By the way the numbers next to the elements are their

*asked on March 3, 2007* -
## maths

Four bells tolls at an interval of 8,12,15 &18 second a respectively. How many times will they toll together in one hour excluding the one at the start?

*asked on September 18, 2015* -
## science

Which of the following is true? ( a ) when plant is kept in sunlight ,photosynthesis and cellular respiration occurs. ( b ) when plant is kept in sunlight ,only photosynthesis occurs (c ) when plant is kept in dark place ,photosynthesis &cellular

*asked on January 9, 2015* -
## maths

Given that root 2 is a zero of the cubic polynomial 6x3+2x2-10x-4root2, find its other two zeroes

*asked on July 5, 2015* -
## Science

If 5 equal pieces of 25 ohm (omega) is joined in parallel then what is the equivalent resistance of it. Is it 5 or 1.please urgent

*asked on March 17, 2017* -
## calculus

A particle is moving along the curve below. y = sqrt(x) As the particle passes through the point (4,2), its x-coordinate increases at a rate of 4 cm/s. How fast is the distance from the particle to the origin changing at this instant?

*asked on October 26, 2010* -
## maths

Find all possible pairs of two natural numbers whose sum is 77 and their g.c.d. is 7

*asked on December 8, 2016* -
## math

The length of Paulo’s lunch break follows a normal distribution with mean μ minutes and standard deviation 5 minutes. On one day in four, on average, his lunch break lasts for more than 52 minutes. Find the value of μ.

*asked on February 13, 2014* -
## math

12. IF 1/SinA+1/CosA=1/SinB+1/CosB ,PROVE THAT: Cot{(A+B)/2}=TanA.TanB

*asked on March 8, 2018* -
## statics

A former student of ENG8101 wishes to weigh him/herself but only has access to a scale A with capacity limited to 400 N and a small 80-N spring dynamometer B. With the rig shown, he/she discovers that when he/she exerts a pull on the rope so that B

*asked on April 9, 2016* -
## maths

If one of the zeroes of the cubic polynomial x3+ax2+bx+c is -1 then the product of the other two zeroes is -------(A) b -a +1 (B) b-a-1 (C) a-b+1 (D) a-b-1

*asked on July 6, 2015* -
## Math

Point B is 10 KM north of Point A and Point C is 10 Km from B on a bearing of 060 from b. Find the bearing and distance of C from A

*asked on March 1, 2012* -
## maths

When 6 boys were admitted and 6 girls left the %of boys increased from 60% to 75% . Find the original no. Of boys and girls in the clasa

*asked on July 5, 2015* -
## PHYSICS

A mass of 100 gm is attached to the end of a rubber string 49 cm long n hving sn area of cross section 20 sqmm. The string is whirled around, horizontally at a cnstnt speed of 40 rps in a crcl of radius 51 cm. Find the young's modulus of rubber.

*asked on October 6, 2015* -
## science

A wire of resistance 12 ohm per metre is bent to form a complete circle of radius 10 c.m.the resistance between its two diametrically opposite point A and B

*asked on December 26, 2014* -
## Maths

Cos^4(θ)/cos^2(α) + sin^4(θ)/ sin^2(α)=1 Prove that cos^4 alpha/cos^ thetha + sin^4alpha/ sin^2thetha= 1

*asked on July 5, 2017* -
## physics

3 charges are placed in a equilateralABC of side l.a point is kept between the sideBc such that the chargeA remains.find the magnitude and sign of the point charge

*asked on March 8, 2017* -
## Chemistry

What will happen if an iron spoon is used to stir an AgCl solution?

*asked on September 18, 2018* -
## Maths

In a cricket, a bowler throws a ball at the height 5m. A ball bounces on the pitch at 8m away. A wicket keeper catches this ball from 5m away at the height of 8m. How much distance the ball has covered after pitch. Please show the method.

*asked on March 23, 2017* -
## Chemistry

Will there be a reaction if a magnesium strip is placed in a solution containing Zn2+ ions?

*asked on September 18, 2018* -
## maths

A wire from a square of area 324 cm2. If A wire from a semicircle then area becomes ------

*asked on March 7, 2017* -
## maths

For which values of a and b , are the zeroes of q(x)=x3+ 2x2+a also the zeroes of the polynomial p (x)= x5 -x4-4x3+3x2+3x+b? Which zeroes of p (x) are not the zeroes of q (x)?

*asked on July 5, 2015* -
## science

The focal length of a concave mirror, that produces four times larger real image of an object placed at 5 cm distance from the mirror, is------

*asked on July 18, 2015* -
## physics

A horizontal, straight wire carrying 12 A current from east to west is in the earth's magnetic field B. At this place, B is parallel to the surface of the earth, points north and its magnitude is 0.04mT. Determine the Magnetic Force on 1 m length of wire.

*asked on March 23, 2016* -
## maths

If the circumference of a base of a hemisphere is 2 pie then it's volume is ---' cm3

*asked on March 12, 2016* -
## science

The focal length of a concave mirror, that produces four times larger real image of an object placed at 5 cm distance from the mirror, is------

*asked on July 19, 2015* -
## maths

Given that^2 is a zero of the cubic polynomial 6x3+2x2-10x-4^2, find its other two zeroes

*asked on July 5, 2015* -
## maths

A series of steps lead to a temple.The number of step is 30. The height of each step is 20 cm.Then find the height of the temple from the base.

*asked on March 16, 2015* -
## maths

In a cricket, a bowler throws a ball at the height 5m. A ball bounces on the pitch at 8m away. A wicket keeper catches this ball from 5m away at the height of 8m. How much distance the ball has covered after pitch

*asked on February 3, 2017* -
## maths

The cost of 100 fruits is rupees 500. Cost of 1 watermelon ,1 guava,1 banana respectively rupees 50,10 and 1 find the no.of fruit of each type

*asked on September 16, 2015* -
## maths

If sphere is divided in to four equal parts then find the total surface area of one part of sphere.

*asked on December 26, 2014* -
## Maths

If a cone of radius r and slant height 2r is surmounted on a cone having radius 2r and slant height 4r then find total surface area of solid

*asked on December 8, 2017* -
## Maths

if a spherical medicine with radius r is broken down in to 1000 spherical small tablets then the css of original spherical medicine will become---- times

*asked on November 22, 2017* -
## Maths

The diameter and length of a roller are 84cm and 120 cm respectively in how many revolution can the roller level the playground of area 1584 Sq meter

*asked on August 28, 2017* -
## Maths

9^x+2 - 6* 3^x+1= 0 find x Answer earlier I got confused

*asked on August 11, 2017* -
## maths

In the green rectangular board of measure 20×15 ,there is a white square with side 10 units. In the square, there is a orange right angle triangle of measure 3×4×5 . Find the probability that a dart strikes in orange portion

*asked on January 2, 2017* -
## maths

Mr. Ahmed age is 47 yes and sani's age is 15 years .In how many years will Ahmed 's age be double of Sani's age?

*asked on March 3, 2016* -
## chemistry

Treatment with sodium borohydride converts aldosterone A in to an optically inactive alditol. Ruff degradation of A from B, whose alditol is optically inactive. Ruff degradation of B from D - glycerol dehydration. Identify A and B

*asked on July 7, 2015* -
## maths

Angle AOP is an acute angle .circle (O, OP ) is passing from A. Line l touches at A. No is perpendicular on line l from P. If AN =15 PN =9 then radius=-----

*asked on March 7, 2017* -
## maths

Find the two natural no in the ratio of 5:7 such that it's lam is 210 with method

*asked on November 23, 2016* -
## Math

Rushil and Timmy shared a sum of money in the ratio 3:4. If Timmy received R 6 more than Rushil, find the total sum of money shared between them.

*asked on August 20, 2016* -
## maths

If one of the zeroes of cubic polynomial x3 + ax2 + bx + c is - 1 then the product of the other two zeroes is -----

*asked on December 21, 2015* -
## Gr.12 Chemistry

What will happen if an iron spoon is used to stir an AgCl solution?

*asked on September 18, 2018* -
## Maths

Please show the method of showing root 42 on number line.

*asked on August 16, 2017* -
## maths

If six cubes of 10 cm edge are joined edged to edge then the surface area of the resulting cuboid is ------please show method

*asked on January 3, 2017* -
## maths

The probability of card being an ace of heart in a pack of 52 card is----

*asked on October 5, 2015* -
## science

In which of the following statement the word light year is used correctly? (A) Ceres dwarf galaxy is 2.46 million lightyear away from us.(B) light travels with the speed of 1 lightyear in the universe (c) the next complete solar eclipse will be seen after

*asked on March 16, 2015* -
## maths

If lemon is divided into four equal parts then find the total surface area of one part of lemon

*asked on December 25, 2014* -
## chemistry

how many liters of carbon dioxide produce when 6kg sodiumcarbonate react with excess hcl at 37 c

*asked on December 11, 2011* -
## Maths

If the sum of circumferences of two circles wirh radii r1 & r2 is equal to the circumference of a circle of radius r, then what is true 1 r1+ r2 = r or sum of their squares= r2

*asked on December 26, 2017* -
## Maths

(a^2 - b^2) sin theta+ 2abcos thetha= a^2 + b^2 then find tan theta

*asked on July 10, 2017* -
## Maths

Cos4theta/cos2alpha + sin4theta/ sin2alpha=1 prove that

*asked on July 4, 2017* -
## maths

If mewi=xi-25/10 and sigma fiui=20 and sigma fi=25 what is the mean?

*asked on September 23, 2016* -
## Math

66:36::18:?

*asked on March 26, 2016* -
## maths

If radius and height are equal for a cylinder,cone and hemispere are same,the ratio of their volume will be------

*asked on December 21, 2015* -
## maths

In TRIANGLE ABC points P,Q,R arethe points lies inside triangle in such a way that Ap= PR, BQ=QP &QR=RC n area of triangle PQR =100 then find the Area of ABC

*asked on November 13, 2015* -
## maths

Given that√2 is the root of cubic polynomial 6x3 + 2x2-10x -4√2 find the other two roots

*asked on July 5, 2015* -
## biology

Through which are the chromosomes, transmitted according to the path of transmission of factors from the parental generation to offspring's as indicated by Mendle?option are as follows (1) hereditary chapters (2) evolution (3) heredity (4) gametes

*asked on February 11, 2015* -
## science

Through which are the chromosomes, transmitted according to the path of transmission of factors from the parental generation to offspring's as indicated by Mendle? (1) hereditary chapters (2) evolution (3) heredity (4) gametes

*asked on February 11, 2015* -
## science

Through which are the chromosomes, transmitted according to the path of transmission of factors from the parental generation to offspring's as indicated by Mendle? (1) hereditary chapters (2) evolution (3) heredity (4) gametes

*asked on February 11, 2015* -
## maths

Radius of a circle inscribed in a regular hexagon is 24 c.m. then find the length of hexagon

*asked on January 24, 2015* -
## maths

If (k,1) , (0,d) , (1,1) are collinear then find 1/k + 1/d =---

*asked on January 23, 2015* -
## math

Fill up the grid with the help of clues given below-

*asked on June 2, 2014* -
## physics

if a boy runs along a circular field of 200m diameter in 40 seconds. How much distance will he cover in 2 minutes and 20 seconds and what shall be his displacement

*asked on April 25, 2012* -
## science

what is the science?

*asked on May 7, 2008* -
## Algebra 2

Let f(x) = 3x^2 – x + 2 and g(x) = 5x^2 – 1. Find f(g(x)). Show each step of your work. I got 75x^4 -35x +6 If that is wrong can you correct me. Thank you!

*asked on April 8, 2017* -
## Maths

The party of kejriwal walks from gwalior to Bhuvneshwar. They first walk straight for 150km and then turn 45 ddegree towards Varansi and again go straight for 120km how for have they travelled from the initial place. Please show the method.

*asked on March 23, 2017* -
## Maths

10 marks add to each of the 12th standard students marks due to poor result which of the following measure does not change? (A)mean (b) median (c) mode(d) standard deviation

*asked on March 19, 2017* -
## Maths

At present what you are answering my question ,what is the probability of getting 1 out of 1 marks

*asked on March 18, 2017* -
## Science

Which tunable property is the great thrust in biological and medical sciences? A) physical B) chemical C) biological D) none

*asked on March 11, 2017* -
## maths

The measure of the side of an equilateral triangle is 6cm. Then area of circle touching all three sides of given triangle is ------cm2 (a) pie (b) 3 pie (c) 12 pie (d) 36pie

*asked on February 25, 2017* -
## maths

Angle of elevation of sun from earth is called? (A) sunset (b) sun's altitude (c) sunrise (d) none

*asked on February 25, 2017* -
## maths

Find two natural numbers in ratio 5:7 such that their l.c.m.is 120

*asked on February 22, 2017* -
## maths

Find two natural numbers in ratio 5:7 such that their lives. L C.m. is 210

*asked on February 3, 2017* -
## chemistry

In equation He +Br2------>2HI why chemical rate of Br2 is taken as 1/2 . It's a reversible reaction. Please explain in detail. While H2 rate is taken as 1 why?

*asked on December 24, 2016* -
## maths

If the graph of f (x)=ax2+bx+c then how do we know the value of b from the graph. We will come to know the value of a & c by the shape of the graph like open upward or downward but what about 'b' explain

*asked on December 21, 2016* -
## maths

Find all possible pairs of two natural numbers whose sum is 77 and their g.c.d. is 7

*asked on December 6, 2016* -
## maths

Find all possible pairs of two natural numbers whose sum is 77 and their g.c.d. is 7

*asked on December 6, 2016* -
## maths

If 6 cubes of 10 cm edge are joined edged to edge then the surface area of the resulting cuboid is ----

*asked on February 24, 2016* -
## science

Two wires if the same metal and of the same dia. And same length are connected in series 1st n then parallel, the ratio of energy produced during series n parallel connection will be ..... A. 1:2 B. 2:1 C. 1:4 D. 4:1

*asked on February 11, 2016* -
## maths

In triangle PQR QM perpendicular to PR, RN perpendicular to PQR, H is ortocentre of triangle PQR then PNHM is -----

*asked on February 6, 2016* -
## maths

In triangle PQR QM perpendicular to PR, RN perpendicular to PQR, H is ortocentre of triangle PQR then PNHM is -----

*asked on February 4, 2016* -
## science

Resistivity dependent on length and area or not

*asked on December 16, 2015* -
## science

Rheostat varies what 1. Current 2. Resistance 3 . voltage

*asked on December 16, 2015* -
## maths

60 students appear for examination. Out of which 1/15 th were failed and total percent of students who got more than 90% were 0.125% .then if 1 student randomly choose find the probability of getting that students to be passed

*asked on December 10, 2015* -
## maths

In TRIANGLE ABC points P,Q,R arethe points lies inside triangle in such a way that Ap= PR, BQ=QP &QR=RC n area of triangle PQR =100 then find the Area of ABC

*asked on November 11, 2015* -
## sanket study centre

In triangle ABC p,q,r such that they lie interior of triang ABC and AP=AR and all the three sides of triangle PQR are scalan if area of triangle PQR is 100 then find area of triangle ABC

*asked on November 11, 2015* -
## science

In which part of the alimentary canal digestion of starch began?

*asked on October 25, 2015* -
## science

What is not present in animal cell if nucleus is absent

*asked on September 17, 2015* -
## maths

Arrange 10 people in 5 rows in such a manner that there are 4 people in each row

*asked on September 16, 2015* -
## chemistry

Treatment with sodium borohydride converts aldosterone A in to an optically inactive alditol. Ruff degradation of A from B, whose alditol is optically inactive. Ruff degradation of B from D - glycerol dehydration. Identify A and B. Please help urgently.

*asked on July 8, 2015* -
## chemistry

Treatment with sodium borohydride converts aldosterone A in to an optically inactive alditol. Ruff degradation of A from B, whose alditol is optically inactive. Ruff degradation of B from D - glycerol dehydration. Identify A and B.please give satisfactory

*asked on July 7, 2015* -
## maths

The number of polynomial having zeroes as -2 and 5 is --------(A) 1 (B)2 (C) 3 (D) more than 3

*asked on July 6, 2015* -
## science

How many sex chromosomes are found in the reproductive cells of human being?

*asked on March 13, 2015* -
## maths

Radius of a circle inscribed in a regular hexagon is 24 c.m. then find the length of the side of hexagon

*asked on January 24, 2015* -
## science

An inverted image of a candle is formed when kept in front of a convex mirror .If half lens is covered by an op equestrian material than how will the image be?

*asked on January 9, 2015* -
## science

A 2 kw&22 heater works on domestic voltage main supply. What should be the current rating of fuse explain

*asked on December 26, 2014* -
## trig

How much does it cost to paint a triangular surface of sides 6m,5m, and 11m at the rate of rs.20/-per metre square.

*asked on December 3, 2014* -
## Science

Express mass of the Earth in unit of M. Take ME = 6 x 1024kg.

*asked on December 2, 2012* -
## Science

Express mass of the Earth in unit of M. Take ME = 6 x 1024kg. The apparent magnitude of the sun is £¡ 26.81 and that of another star is£¡1.81. How much brighter the sun is with respect to that star ?

*asked on December 2, 2012*

## Pages

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