# Sanjay

Popular questions and responses by Sanjay
1. ## 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

2. ## maths

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

3. ## Maths

Under root x+ under root x up to infinite time =6 find x

4. ## 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?

5. ## 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.

6. ## 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

7. ## Probability

Let 𝑋 and 𝑌 be independent positive random variables. Let 𝑍=𝑋/𝑌. In what follows, all occurrences of 𝑥, 𝑦, 𝑧 are assumed to be positive numbers. 1. Suppose that 𝑋 and 𝑌 are discrete, with known PMFs, 𝑝𝑋 and 𝑝𝑌.

8. ## Maths

9^x+2 - 6* 3^x+1= 0 find x

9. ## science

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

10. ## 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?

11. ## Chemistry

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

12. ## Maths

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

13. ## Maths

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

14. ## 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------

15. ## 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

16. ## maths

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

17. ## 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

18. ## Chemistry

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

19. ## math

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

20. ## Maths

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

21. ## 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!

22. ## Maths

What is the probability of a question (mcq)you are writing now to get 1 Mark out of it.

23. ## 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

24. ## maths

Line AB touches circle (p,12) at A and circle (Q, 5) at B. If PQ = 25 and A and B are either side of line PQ then AB=-

25. ## 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

26. ## 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

27. ## maths

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

28. ## 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.

29. ## maths

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

30. ## 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)?

31. ## 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

32. ## maths

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

33. ## math

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

34. ## 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 ?

35. ## chemistry

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

36. ## Gr.12 Chemistry

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

37. ## Maths

A tetrahedeon is a four sided object .each side or face is an equilateral rriangle . the number 1,2,3&4 are used to number the different faces. A trial consist of rolling the retrahedron and reading the number that face down then p(4) is____

38. ## 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

39. ## 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

40. ## 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

41. ## 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

42. ## Maths

In trapezium ABCD AB Parallel to CD diagonal intersect at O(AC and BD)how can we prove that AOD and COD are similar

43. ## Maths

(Cos/1+cosec) + (sin/ 1+cot ) = sin + cos prove that

44. ## Maths

What is added to 5,9,17,27 to be in proportion

45. ## 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

46. ## Maths

Cos4theta/cos2alpha + sin4theta/ sin2alpha=1 prove that

47. ## Science

Which is more harmful tannin or caffeine?

48. ## Math

Find the three rational number of 5 and -2

49. ## 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.

50. ## 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.

51. ## Maths

(1+a+b+c)(1+ 1/a +1/b +1/c )= 16 then find a+b+c. Show the method

52. ## 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

53. ## Maths

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

54. ## Maths

What is the probability of the question that you are answering To get 1Mark out of 1mark in that question.

55. ## Maths

please explain this mcq- According to Euclid's division of Lemma, for a and 5 if a=5q+r is unique then r = ...... is not possible. A. 0 B. 2 C. 4 D. 6

56. ## 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

57. ## maths

Angle AOP is an acute angle .circle (O, OP ) is passing from A on the circle. Line l touches at A. N is perpendicular on line l from P. If AN =15 PN =9 then radius=-----

58. ## Science

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

59. ## Science

What is the increment in power if current increases by 1% and resistance remain constant

60. ## maths

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

61. ## 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=-----

62. ## maths

A two digit number is k times the sum of the digit. By interchanging the digits, Find the number is how many times its sum of the digits. Explain method

63. ## maths

AB touches circle (P, 12) at A and circle (Q, 5) at B. If PQ= 25 and A&B are either side of PQ tthen AB= -------- please explain with diagram

64. ## 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

65. ## maths

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

66. ## maths

In triangle ABC a=8 b=9 c=7 then what is radius (a) 2.5 (b)3.5 (c)4.5 (d) 1.5

67. ## maths

How are the angles to be constructed in distinct half plane of a line segment for division of line segment? (A) obtuse (B) acute (c)right (d) A OR B

68. ## maths

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

69. ## 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

70. ## maths

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

71. ## maths

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

72. ## 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

73. ## 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

74. ## Maths

If the angles of triangle ABC are in increasing order and in an arithmetic progression then find sinB

75. ## 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?

76. ## 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

77. ## maths

If a spherical medicine with radius R is broken down into 1000 spherical small tablets then the surface area of original medicine will become ----------times. Please show method how to do

78. ## maths

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

79. ## maths

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

80. ## maths

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

81. ## maths

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

82. ## chemistry

What is n+1+m for 4p orbital and what is n+l+m for 4p orbital

83. ## maths

How many circles are there whose central lines on X axis and passes through origin?

84. ## maths

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

85. ## 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.

86. ## 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

66:36::18:?

88. ## 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.

89. ## maths

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

90. ## science

Metal obtained by chemical reduction is it iron or aluminium?

91. ## English

Are your guides kind to you? l asked (questions tag) (A) are they? (B) aren't they?

92. ## 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?

93. ## maths

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

94. ## English

I m silver and exact. I have no preconceptions. Whatever I see I swallow immediately. Just as it is, unmisted by love ordislike. I m not cruel, only truthful-.The eye of a llittle god, four cornered.Most of the time I meditate on the opposite wall.It is

95. ## 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

96. ## 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

97. ## 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

98. ## maths

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

99. ## maths

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