# rohit

Most popular questions and responses by rohit
1. ## math

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

2. ## 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)

3. ## physics

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

4. ## maths

Divide 54 into two parts such that one part is 2/7 find the other

5. ## 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

6. ## 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

7. ## math

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

8. ## 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?

9. ## 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?

10. ## 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

11. ## Maths

In a parallelogram the base and height are in the ratio of 5:2 ,if the area of parallelogram is 360 find base and height

12. ## 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

13. ## physics

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

14. ## 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)?

15. ## 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.

16. ## 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?

17. ## science

find the number of moles in 48 gm or carbon

18. ## physics

You must have seen actors in Hindi films jumping over huge gaps on horse backs and motor cycles. In this problem consider a daredevil motor cycle rider trying to cross a gap at a velocity of 100 km h–1. (Fig. 4.13). Let the angle of incline on either

19. ## Chemistry

25ml of 0 3 3. M HNO are mixed with 75ml of 0 3 4. M HNO . If the volumes are additive, the molarity of the final mixture would b

20. ## 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.

21. ## 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?

22. ## 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?

23. ## 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

24. ## Math

Triangle ABC is a right angled at A. AD is perpendicular to BC,AB=5cm,BC=13cm andAC=12cm. Find the area of triangle ABC.also find the length of AD

25. ## 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

26. ## 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)|

27. ## 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

28. ## 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

29. ## 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.

30. ## chemistry

what increasing order of dipole moment among nitrobenzene methylbenzene phenol and toluene

31. ## science

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

32. ## 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

33. ## 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

34. ## dav

determine the concentrated of mohrs salt solution with the help of supplied n/10 kmno4 solution preparred?

35. ## 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?

36. ## maths

Find the number of positive integers

37. ## 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

38. ## Math quiz

Proof that half of 9 is 4.. uhm..it's proove instead of proof need a clue?

39. ## 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.

40. ## 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 ?

41. ## 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

42. ## 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?

43. ## 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

44. ## 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

45. ## 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?

46. ## 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,

47. ## math

For what value of 'k' the points ( -k + 1, 2k), (k, 2 - 2k) and ( - 4 - k, 6 - 2k) are collinear.

48. ## maths

5 geometric mean betweem 16 and 1/4

49. ## math

a circular pizza is cut along four diameters into eight identical sectors. If the total perimeter if each sector is 10 inches what is area of the whole pizza? express answer as a decimal to nearest tenth

50. ## maths

write numeral for thirty seven crore thirteen thousand nine hundred forty eight

51. ## 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

52. ## 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.

53. ## 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

54. ## 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

55. ## maths

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

56. ## 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.

57. ## 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

58. ## 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?

59. ## calculus

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

60. ## 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

61. ## uni of huddersfield

An electron (m = 9 x 10-31 kg) leaves the cathode of a radio tube with zero initial velocity and travels in a straight line to the anode, which is 1 cm away. It reaches the anode with a velocity of 6 x 106 m s-1 i)calculate the acceleration and the force ?

62. ## chauhan

sinx/1 cosx sinx/1-cosx=4 ,x lies in 1st quadrant then value of x is

63. ## 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

64. ## 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

65. ## maths

Determine 208/207+208/207×206/205+208/207×206/205×204/203+…

66. ## 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.

67. ## maths

How many positive integers n are there such that 10^n≤n^10?

68. ## maths

What is the smallest positive integer with exactly 12 (positive) divisors?

69. ## math

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

70. ## maths

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

71. ## 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?

72. ## 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

73. ## 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 arithmetic

74. ## Math

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

75. ## 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

76. ## maths

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

77. ## math

underoot 2x square +3x + underoot 2 by alpha into beta method.

1. ## math

Actually you need to find series that means sum of the sequence.. That is formula of Sn=? By using Tn=Sn-S(n-1)

posted on July 4, 2019
2. ## Physics

It is 100 percent correct answer

posted on April 5, 2019
3. ## math

FIND 3 TERMS IN GP WHOSE SUM & PRODUCT RESPECTIVELY ARE 28 AND 512

posted on February 11, 2018
4. ## math

HHHHHHHHH

posted on February 11, 2018
5. ## math

posted on January 29, 2018
6. ## maths

Y=60

posted on March 5, 2017
7. ## Math

2+3 =5

posted on January 11, 2017
8. ## 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?

posted on November 3, 2016
9. ## phsics

24.5

posted on October 18, 2016
10. ## maths

Sorry I don't know

posted on May 15, 2016
11. ## math

posted on January 16, 2016
12. ## Citizens

the rights and responsibilits of citizens

posted on January 14, 2016
13. ## general maths

7+9+15

posted on January 6, 2016
14. ## 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 = 25 144 =169 Therefore, AC =13

posted on September 28, 2014
15. ## PHYSICS

hey have u got this@Anonymous

posted on November 10, 2013
16. ## Math

evaluate r. if12Pr=1320

posted on August 30, 2013
17. ## Math

evaluate r. 12Pr=1320

posted on August 30, 2013
18. ## 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

posted on July 16, 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

posted on June 16, 2013
20. ## math

posted on June 15, 2013
21. ## pls heeelp math

answer is 6/11 or 11+6= 17

posted on June 8, 2013
22. ## maths

419.....go and get points

posted on June 6, 2013
23. ## Geometry and combiantorics.

yes randy morico is correct

posted on June 5, 2013