pooja

Most popular questions and responses by pooja
1. If alpha

If alpha& beta are the zeroes of the polynomial 2x2-7x+3. Find the sum of the reciprocal of its zeroes

2. chemistry

concentrated aqueous sulphuric acid is 98% sulphuric acid by mass and has a density of 1.80 g/l. Volume of acid required to make one litre of 0.1M sulphuric acid solution is

3. maths-probability

The diagram shows a spinner with six numbered sections.(where it has number 2 twice, # 1 triple & # 6 once ) Some of the sections are shaded. Each time the spinner is spun it stops on one of the six sections. It is equally likely that it stops on any one

4. Physics

Hi guys, Im a bit stumped on how to solve an online physics homework problem and it's really bothering me. I have no idea how to come up with the angles or even attempt the problem and neither do my friends. We'd all really appreciate it if someone could

5. maths

from the top of a light house the angle of depression of a ship sailing towards it was found to be 30 degrees . after 10 seconds the angle of depresion changes to 60 degrees. assuming that the ship is sailing at uniform speed. find how much time it will

6. Science

What is the equivalent weight of HCL in given reaction : k2cr2o7+14hcl=2kcl+2crcl3+3cl2+h2o

7. Science

How do I draw a particle diagram to show how ear defenders work?

8. Math

The product of 1000 whole numbers is 1000. What is the largest possible value the sum of these numbers can have? A)1000 B)1992 C)1993 D)1999

9. maths

a floor is 5m long and 4m wide. a square carpet of 3m is laid on the floor. find the area of the floor that is not carpeted

10. chemistry

1.what is meant by atomic number of an element? 2.the mass number of an element is 18,it contains 7 electrons.what is the number of protons and neutrons in it?what is the atomic number of the element? 3.an element has an atomic number of 11 and its mass

11. Maths

The circumference of a given circular park is 55m.it is surrounded by a path of uniform width 3.5m.find the area of the path

12. Science

Write the balanced chemical reactions using the appropriate symbols​

13. Physics

Three particles have charges +20μC each.They are fixed at the corners of an equilateral triangle of side 0.5m .The force on each of particle has magnitude

14. chemistry

When 10.g of NaCl is reacted completely with 65g of Pb(NO3)2 according to the following reaction? How much (grams) of PbCl2 can be produced? 2 NaCl + Pb(NO3)2 ----> PbCl2 + 2 NaNO3

15. Chemistry

A biochemical engineer isolates a bacterial gene fragment and dissolves a 15.1 mg sample of the material in enough water to make 32.7 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C. a) What is the molar mass of the gene

16. maths

An isosceles right triangle has a hypotenuse of 18m. Find the other two sides?

17. Maths

Integration of sine square theta from 0 to 2pi

18. math

Given is the Income Statement for the year ended December 31, 2015, Statement of Retained Earnings for the year ended December 31, 2015 and Comparative Balance Sheets for 2014 and 2015 of Maris Corporation:    Maris Corporation Income Statement Year

19. biology:plz someone help

The heart lung machine is used so that surgeons can operate on the arteries supplying heart muscle. These arteries may be diseased. (a) Name these arteries and explain how they may become diseased. (b) suggest why a patient is put on a heart lung machine

20. chemistry

Mg+2 is isoelectronic species with ................ (give 2 species)

21. physics

Whn sand is poured on a rotatory disc what happens to its angular velocity. Explain

22. biology

humans have a double circulation system. there is a low pressure circulation and a high pressure circulation. (a) explain how the structure of the heart enables it to pump blood into two circulations at different pressures

23. biology

The heart lung machine is used so that surgeons can oprate on the arteries supplying heart muscle.the arteries may be diseased. (a) Name these arteries and explain how they may become diseased (b) suggest why a patient is put on a heart lung machine during

24. programming

Write a Java application that computes and prints the grade of a student according to the following algorithm: 1) It should read from the user TMA score and MTA score. 2a) If their sum is less than 15, the grade "FC" should be printed and the program will

25. biology:plz help

state the name for the action of two oppposing miscles, such as the biceps and the triceps.

26. math

A solid wooden cube is painted blue on the outside. The cube is then cut into 27 smaller cubes of equal size. What fraction of the total surface area of these new cubes is blue?

27. science

A Boy of mass 25 kg climbs atop a playground slide of height h= 3 m. When the boy slides down the inclined board, the work done to overcome friction is 550 Joule. What is the boy’s speed before he touches the ground.

28. Intro to chem

What is the volume of 19.7g of oxygen at STP? Heres what i got but did not get the same answer..pls tell me where i am wrong! (grams to moles) 19.7g x 1 mol/ 16.00 = 1.23 mol Oxygen (Pv=nRT) looking for V 1.23 mol x 0.0821 x 273K / 1.00 atm = 27.57 CORRECT

29. Chemistry

Show that the reaction caco3 ->cao+co2 is not a redox reaction

30. biology

The heart lung machine is used so that surgeons can operate on the arteries supplying heart muscle. These arteries may be diseased. (a) Name these arteries and explain how they may become diseased. (b) suggest why a patient is put on a heart lung machine

31. Math

A bag contains 2 red, 2 blue, and 2 green marbles, Sue takes one marble at a time from this bag without looking. What is the least number of marbles Sue must take from this bag to be sure that she has taken 2 marbles of the same color? A) 2 B)3 C)4 D)6

32. chemistry

1. name the three fundamental particles present in an atom? mention the masses of the particles in M.K.S. system? 2.what is a proton? stste its relative mass and charge? 3.how many times a proton is heavier than an electron? 4.what important information

33. physics

Why is Tangential acceleration equal to alpha*Radius?

34. science

how far a science satellite should be from the earth's surface.

35. maths

cos(a+b)=m(cos(a-b) then tan a=?

36. Physics

Lisa drops a stone from a wall that is 7.00m from the ground. How long is the stone in the air?

37. english

i have to write on a topic for about 300-400 words . topic is 'IS HOMEWORK HARMFUL OR HELPFUL'

38. English

start with the word cage.make a new,two syllable word by replacing one le1tter with a different letter.

39. Math

In the list of numbers 1,2,3,4,5,6,7,8,9, how many of the numbers in the list are exactly 2 more than some other number in the list? A)2 B)7 C)9 D)11

40. science

what is brain

41. Biology

If gene frequency for PTC nontaster is 0.4, then what will be the number of heterozygotes tasters in a population?

42. science

What is the balanced molecular equation for titration of oxalic acid?

43. probability

consider the experiment of the rolling a pair of fair dyes 1white and the other red are the events (a)doubles is rolled (b)The red is shown two or three,independ

44. physics

a 125 cm long string has a mass 2.0g and it is stretched with a tension of 7.0 IN between fixed support

45. chemistry

1 the mass of one mole of electron is ...... mg. 2 copper(I) ions contains .......... electrons in its 3rd orbitals 3 if both K and L shells of an atom are full,what is the total number of electrons contained in them? 4 what is maximum number of electrons

46. Physics

In its own frame the average pi meson lives 2.60 x 10^-8s. Suppose it moves at 0.985c relative to the Earth. According to us, on Earth, what is a pi meson's average lifetime? (b) according to us, what is the pi meson;s average travel distance before

47. geometry

In Triangle ABC, AD is median. If AB is 8, BC is 18, AD is 7, find AC

48. Math

It is a 5 digit no. ,palindrome,divisible by 4,10 digit is cube root of 1 digit,product of 100 digit and 1 digit is 54 ,sum of hundred and ones digit is 15.what is the number?

49. Math

What is the largest number which is both less than 2*3*5*7 and also a divisor of 2*3*5*7

50. integrated science

what is soil profile?

51. Math

Find area of rectangle whose length is 3 cm and 1 diagnal is 5 cm

52. Math

I am a 3 digit number whose tens place is 5 more than the ones and hundreds place is 8 less than the tens place. Who am i

53. physics

what will be the speed of a 500 kilogram satellite if we apply 100N force on it after each second till 10 hours.the current velocity of this satellite is 16,800 miles per hour?

54. maths

Determine the value of log 18/12 + log 8/12?

55. maths

IF the sum of areas of two squares is 610msquare and the difference of their perimeters is 32m,then find the lengths of their sides?

56. maths

Show that log(1+2+3)=log 1 + log 2 + log 3( with the formula)?

57. maths

in d given figure,AB=12cm and pt=8cm.if PAxPB=PTsquare(square is only for PT), then write a quadratic equation for finding the length of PA?

58. math

If there are two farmers who have grown grass in the circular field then what should be length of rope so that equal crop is distributed to both if rope is tied at the center of the circular field if r is radius of the circle

59. chemistry

1.64 L of a 4.95 M solution is diluted to form a 2.58 M solution. (Rounded to 3 sig figs) there are __________ L of the 2.58 M solution formed.

60. math

what is the common ratio for this geometric series? 15 11 7 3 .5

61. chemistry

1state relative mass and charge of an electron 2 an atom of an element X may be written as 4X^9 (a)What does the figure 9 indicate? (b)what is the number of protons in an atom X? (c)what is the number of electrons in an atoms X? (d)what does the number 4

62. english

whole history from early man to indus valley civilization.

63. chemistry

1 The size of cation is ...... and the anion is ........ than atom. 2 The removal of an electron from an atom results in the formation of a ....... the size of which is ........ than that of the atom.

64. chemistry

what is the shape of p-orbital.........

65. US History

What are proposals for new laws called?

66. math

DRAW a line l construct a line p such that lparallel ro p is at a distance of 3.5cm from l

67. Physics

How do the initial and final horizontal velocities of a projectile compare?

68. Physics

What factors affect the period of a pendulum?

69. Physics

How do you determine the average velocity on a position-time graph?

70. science

why do plants bear fruit?what are plant tissues?

1. Ed. Tech. ~Microsoft Excel~

c

posted on March 29, 2019
2. Chemistry

0.6

posted on December 17, 2018
3. physics

20 cm

posted on May 7, 2018
4. physics

20 cm

posted on May 7, 2018
5. Maths

I 1.21 how can it will be 21

posted on January 3, 2018
6. chemistry

21.15

posted on September 6, 2017
7. science

SIO2

posted on August 26, 2016
8. chemistry

26calk/mol

posted on February 21, 2016

First we have to calculate the seconds ... 34min*60s=2040s therefore, 2040s/9.8m= its may be about 208.16m . They walked...

posted on September 10, 2014

3x 6=2x 13 3x-2x=13-6 1x=7 x=7/1 x=7

posted on September 10, 2014
11. 6th math

3.250kilogram

posted on March 6, 2013
12. area of circle

In fig o is the center of circle AB- 3cm and BC -4 cm then find the area of the shaded region

posted on January 21, 2013
13. chemistry

this questions are related to class9 and the academic sessions hasn't started but since i'm n IIT student we have been given a lot of assignment for the holidays and the portion has to be done. so it would be alot of help if you help me. PLEASE HELP ME I

posted on May 5, 2012
14. math

216/1000

posted on June 26, 2011
15. Intro to chem

Thank you SO MUCH!

posted on April 14, 2011
16. Physics

Thanks!

posted on December 14, 2010
17. Physics

Thank You!!

posted on December 13, 2010
18. Math

In a list of the numbers 1,2,3,4,5,6,7,8,9 how many of the numbers in the list are exactly 2 more then some other number in the list?

posted on October 24, 2008