# Neha

Most popular questions and responses by Neha
1. ## Physics

1. Question: Consider two planets with uniform mass distributions. The mass density and the radius of planet 1 are p1 and R1, respectively, and those of planet 2 are p2 and R2. What is the ratio of their masses? Ans: M1/M2 = (p1/p2)(R1/R2)^3...I got this

2. ## Science

How many moles of mercury will be produced by electrolyzing 1.0M Hg(NO3)2 solution with a current 2.00A for 2 hours.

3. ## maths

The sum of two opposite angles of a parallelogram is 130 find all the angles of the parallelogram

4. ## Physics

An object of mass 0.5 kg is whirled at the end of a string 0.8 m long.If the string makes three revolution in 1.2 s,find the tension in the string.

5. ## Chemistry

92.01 grams of N2O4 (g) is placed in a container and allowed to dissociate. N2O4 (g) --> 2NO2 (g) The mixture of N2O4 and NO2 resulting from the reaction occupies 36.0 liters at a total pressure of 773 mmHg and 45 °C. A. Let x equal the moles of N2O4 that

6. ## Physics

A box of books weighing 303 N moves with a constant velocity across the floor when it is pushed with a force of 400 N exerted down-ward at an angle of 38.6 degrees below the horizontal. Find ìk between the box and the floor. Well I know that I have to use

7. ## Physics

You are riding on a flatbed truck moving at 50 kilometers per hour. You have two identical guns, one aimed forward and one aimed backward, and you fire them at the same time. According to an observer in the ground, 1. the backward bullet appears to move

8. ## math

The product of two rational numbers is -28/81 if one number is 14/ 27 find the other

9. ## math

Yasmin wants to serve 150ml of juice to each of 15 guests. How many 500ml cartons of juice she buy? How much juice will she be left after serving her guests?

10. ## chemistry

when x gram of carbon is completely burnt in certain amount of oxygen y gram of carbondioxide is form.what mass of Co2 will be produced when 2x gram of carbon is burnt in z gram of oxygen. which law of chemistry will help me to find the answer

11. ## Chemistry

What type of isomers are [Pt(NH3)2Br2]Cl2 and [Pt(NH3)2BrCl]BrCl? A. Structural B. Geometric C. Linkage D. Coordination E. Optical

12. ## Chemistry

Determine the mass of CuSO4.5H20 needed to make 100.00mL of a .100M CuSO4.5H20 aqueous solution..

13. ## Chemistry

Rank the following solutions in order of increasing acidity. 1 M phenol 1 M boric acid 1 M cyanic acid 1 M formic acid 1 M hydrochloric acid 2. Rank the following solutions in order of increasing basicity. 1 M C3H5O3Na 1 M KF 1 M KOCN 1 M KOCl All I know

14. ## physics

A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.

15. ## physics

A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.???

16. ## physic

a cold drink bottle of 500 ml weight 25g .when a liquid is filled in it ,it weight 80g .find the density of liquid .

17. ## math

the cost price of16 books is equal to the selling price of 30 books.Find the gain%?

18. ## chemisry

Q2. Distinguish between the following- 1. CH3OH and C2H5OH 2. Phenol and methanol 3. 1-Propanol and 2-Methyl-2-propanol 4. Ethenol and 1-propanol 5. Propanol and propanone 6. Acetaldehyde and benzaldehyde 7. Benzaldehyde and benzoic acid 8. Propanoyl

19. ## math

a retangular field measures 400m by 100m and a square field 200m by 200m A -do the two fields have the same area? B - which field requires more fencing and by how much?

20. ## Chemistry

The iodide ion can be oxidized in an acidic solution by hydrogen peroxide. One proposed mechanism for the reaction is as follows: Step 1: H2O2 (aq) + I-(aq) → H2O (l) + OI-(aq) slow Step 2: H+(aq) + OI-(aq) → HOI(aq) fast Step 3: HOI (aq) + H+(aq) +

21. ## AP Chemistry

2 Al + 3 Cu(NO3)2 --> 2 Al(NO3)3 + 3 Cu 1. Write balanced equations for the oxidation and reduction half-reactions. Identify each half-reaction as oxidation or reduction. 2. In the balanced overall reaction, determine which is the oxidation and reduction

22. ## science

how does a hurricane form?

23. ## maths

Solve and verify 7/x+35=1/10

24. ## Chemistry

2 NO + O2 --> 2 NO2 The reaction rate is increased five­fold when the temperature is  increased from 1400 K to 1500 K. What is the activation energy for the reaction?  I have no idea how to do this and would greatly appreciate some

25. ## maths

If a= 2cosx+ isinx and b = 2cosy +isiny then prove that a+b = 2cos(x-y)(cos(x+y)+isin(x+y))

26. ## maths

Abcd is a rectangle with

27. ## Chemistry

2NaF + CaCl2 ¨ CaF2 + 2NaCl An excess of 0.20 M NaF is used to precipitate the calcium ions from a 50.0 mL sample of a calcium chloride solution. What is the concentration of the original calcium chloride solution?

28. ## math

A man travels 12km towards west then 3 km towards south and then 8 km towards east. How far is he from the Start?

29. ## Science

The mass of sodium carbonate required to prepare 250ml of 0.4N solution is

30. ## mathematics

2cosx=√2+√2+2cos4x

31. ## math

Shreya walks 2/3 km to her school and rosy walk 3/4 km to the school who has to walk a longer distance to reach the school and by how much

32. ## chemistry

What is the largest amount of H2O in grams that can be formed when 5.70 g of H2 reacts with 5.70 g of O2, based on the balanced reaction below. 2 H2 + O2 2 H2O

33. ## chemistry

A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a constant mass is reached. The mass of anhydrous CaSO4 is 1.577g. what is percent by mas of water in the hydrated calcium sulfate

34. ## Physics

Determine Centripetal Acceleration acting on the person standing at the equator? (the radius of earth is given)

35. ## math

find the volume of cube,one face of which has an area of 64 m square

36. ## numericals

A 100g bullet is firred from a 10 kg gun with a speed of 1000 m/s.What is the speed of recoil of the gun.

37. ## math

The capacity of a rectangular tank is 5.2cubic metre and area of its base is 2.6Ã—1000 square centimetres.find its height

38. ## Physics

An airplane has an airspeed of 770 kilometers per hour at a bearing of N 48 degrees E. If the wind velocity is 28 kilometers per hour from the west, find the angle representing the bearing for the ground speed? I found Rx and Ry which are 543.23 and 572.22

39. ## ENGLISH

can someone read my english essay and correct it for me?

40. ## math 12

A)a shed, in the shape of a square based prism, is to have volume 800meters cubed. determin the dimentions of the shed, with the minimum surface area. B)how would the answer change if the minimum surface area did not include the bottem of the shed?

41. ## Physics

A high diver of mass 69.4 kg jumps off a board 9.6 m above the water. The acceleration of gravity is 9.8 m/s2.If his downward motion is stopped 2.21 s after he enters the water, what average upward force did the water exert on him? Answer in units of N

42. ## Chemistry

Nitrogen and hydrogen, with volumes of 12.0 L each, are injected into a sealed rigid reaction chamber containing a catalyst. The pressure of the chamber is 8.00 atmospheres and at a known temperature. The reaction is allowed to proceed to completion while

43. ## Chemistry

You want to determine the molar heat of solution of sodium chloride using a 10.0 g sample of NaCl(aq) and 50.0 mL of water in a coffee cup calorimeter. Which of the following equations would you use? Assume the specific heat of the solution is the same as

44. ## science

suppose your mom is boiling water near the window where did the mist came from and why was there mist on the window

45. ## Science

A cyclist move 4km in the east diraction then he turn to north and move 3km . Find displacement.

46. ## math

A park is in the form of a rectangle 100 m×80 mat. At the centre of the park there is a circular lawn. The area of the park excluding the lawn is 4150 m^2 find the radius of the circular lawn

47. ## math

a body is projected at an elevation alpha with a velocity of 9.8m/s in what time Wii be direction of motion be alpha/2?

48. ## physics

A river flow of width 100 m is flowing with velocity of 1.5 m/s .A man start from one end with rest relative to river .He raws with an acceleration of 2 m/s^2 relative to the river if the man want to cross river in minimum time by how much distance will he

49. ## Stats/Probability

If 23% of the cars that pass by your house each day are red, 12% green, 4% yellow, and 31% black; what is the probability the next car to pass your house will be red or yellow? (Assume every car is only a single color). I have to pick which formula to use.

50. ## Chemistry

Which of the following substances exist(s) as a resonance hybrid? CO2 (g) SO3 (g) HCO2- (aq) A. I only B. II only C. III only D. I and II only E. II and III only Ans w/i 12 hrs please!!

51. ## Chemistry

For each compound, draw a line structural diagram of all isomers. Identify the kind(s) of isomers illustrated. A. CH3CH=CHCH3 B. C3H7OH C. CHIFCl

52. ## Science

1. I got a list of solutions. We did a test in the lab to figure out what was there pH. How do you figure out which one is the most acidic and the most basic? 2.When might you need to know whether a solution is acidic or basic? 3. Dishwasher detergent,

53. ## PreCalc

A contractor plans to build an artist's studio with a roof that slopes differently on the 2 sides. On one side, the roof makes an angle of 33 degrees with the horizontal. On the other side, which has a window, the roof makes an angle of 65 degrees with the

i need a written example of an article.

55. ## science

what is pluto called? i think it is a star is that correct. im doingit for extra credit. and why do they call it stars

56. ## physics

What is the value of current when charge of 5 uc paases through a conductor in 2seconds

57. ## proposal writing for high school english

how to write a proposal in brief for a 10 marks question? What structure should be followed for just 10 marks?

58. ## Math

When doing translation you have to write for example A(1,1) then when you write it you write A'(2,2) how would you write it to the fourth. Would you tally or do Roman numerals

59. ## college physics

the question is that what happened when the ozone layer becomes destroyed?

60. ## Math

wat r the factors for 125-50-54 and 48?

62. ## s.g (math)

if a triangle with sides 12 unit and 5 unit is inscribed in a circle with BC as diameter, then find the value of sin square theta +cos square theta -1

63. ## real analysis

Arbitrary union of closed set is closed Prove or disprove

64. ## real analysis

Closure of the set of irrational number is phi

65. ## math

Roger buys six 1.5- litre bottles of fresh juice. he distributes 20 cl of juice to each of his pupils. calculate the number of pupils in his class if 600 ml is left.

66. ## math

In a test which had 30 questions carrying 1 mark each ajay scored 60persant marks. How many questions did he answered correctly

67. ## science

How food travels through various compartments

68. ## math

What should be added to (2/3+3/5) to get -2/15

69. ## math

Evaluate 6/7-2+-7/9+19/21

70. ## maths

Solve : 1/x+1+1/x+2= 2/x+10

71. ## Maths

A hand fan is made by stitching 6 equal size triangular strips of two different types. The dimensions of equal strips are 25cm, 25 cm and 14 cm.Find the area of each type of paper needed to make the hand fan.

72. ## Physics

An ant climbs onto the side of a bicycle tire a distance of 40.0 m from the hub. If the 0.010 g ant can hold onto the tire with a force of 4.34*10 to the -4, at what frequency would the tire fling the ant of assuming the wheel is spun on a horizontal

73. ## science

an aircraft travelling at 600km/hr accelerates steadily at 10 km /h every second. Assuming speed of sound is 100 km /h t the aircrafts altitude , how long will it take to reach the sound barrier

74. ## Math

determine the value of k for which the fuction f(x)=4x^2-3x+2kx+1 has 2 zeros.

75. ## math g 11

the kwans will need \$50,000 in 3years to expand their business. what is the equivalent value today if inflation is projected to be approx 3.5% per year compounded anualy

at giant tv sales, you can chose between 2 payments options for a new tv. 1st option is 2 pay \$2399.99. 2nd option is to pay a \$399.99 downpayment plus \$2200.00 after one year. if interset is 4.2% per year, compunded quarterly, wich option is a better deal

77. ## Chemistry

What you can predict about a reaction whose activation energy is zero?

78. ## Chemistry

On the basis of MOT, explain why the stability of N2 decreases on ionization but the inverse is true for O2.

79. ## Chemistry

Why Energy of is smaller than π2px and π2py in case of O2 but it is opposite in case of N2.

80. ## physics

the magnitude of 2 vectors are 4 and 5 units and the angle b/w them is 30,taking first vectoron x-axis.find the magnitudeof resultant vectorand its direction?

81. ## maths

The mean of 10 observations is 21. If each score is divided by 3, find the new mean.

82. ## social studies

Between 1935 and 1957, a period that included World War II, the birth rate rose from 16.9 to 25 per 1000 people. What was the most likely cause of this "baby boom?"

83. ## religion

When jesus took the _________ one of the soilders took a lance or a sword and pierced his side.

84. ## science

suppose your mom is boiling water near the window where did the mist came from and why was tehre mist on the window

85. ## math

which store is cheaper kroger or meijers?

do people live in mars?

87. ## science

do people live in mars?

88. ## science

do people live in mars?

89. ## social studies

WHAT IS THE TROJAN WAR?

90. ## english

which are nouns? This experienced adventurer loved to climb mountains.

91. ## science

what is the full name of RDF?

1. ## math

I love the way they are solving

posted on April 16, 2019
2. ## math

No

posted on January 12, 2019
3. ## math

posted on October 24, 2018
4. ## the length of a rectangular plate is measured by a

a

posted on July 15, 2018
5. ## math

-7,0and7

posted on January 7, 2018
6. ## Science

how the N becomes 85 in first ?

posted on November 27, 2017