Ariana

Most popular questions and responses by Ariana
1. Physics

An astronaut of mass m in a spacecraft experiences a gravitational force F=mg when stationary on the launchpad. What is the gravitational force on the astronaut when the spacecraft is launched vertically upwards with an acceleration of 0.2g? A 1.2mg B mg C

2. English

Choose a selection from the crossing borders unit. Write a short explanation of how one of the individuals in this selection is affected by a border crossing. Use specific examples or details to support your answer. I picked the story "Delfino II: Diez In

3. Math

what is the circumference of the circle round your answer to the nearest foot the circle is 28 ft. A.) 88 ft B.) 84 ft C.) 66 ft **** (ANSWER) D.) 44 ft

4. Maths Vector Helpppp

The points A and B have position vectors, relative to the origin O, given by −−→OA = i+2j+3k and −−→OB = 2i+j+3k. The line l has vector equation r = (1−2t)i+ (5+t)j+ (2−t)k. (i) Show that l does not intersect the line passing through A and

5. Maths!

Find the sum of all multiples of 5 between 100 and 300 inclusive. Ans: 8200 I do not know how to do this. Really do appreciate step by step workings and explanation. Thanks!

6. chemistry

What type of intermolecular forces would you expect to find between molecules of H2O? of BrCl? of hexane (C6H14)?

7. Chemistry

Which process could be used to calculate the bond energy for the covalent bond X-Y by dividing its ∆H by n? A XYn(g) → X(g) + nY(g) B 2XYn (g) → 2XYn-1(g) + Y2(g) C Y(g) + XYn-1(g) → XYn(g) D nXY(g) → nX(g) + n/2 Y2(g)

8. Chem Help!

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons

9. History

The Thirteenth, Fourteenth, and Fifteenth Amendments reflected the growing 19th century American trend of A) granting universal manhood suffrage. B) upholding rights of free speech and religion. C) decreasing the power of the Federal government.

10. Chemistry

(True or False) Wax is nonpolar, yet it exists as a solid at room temperature. Its solidity is best explained by the presence of dispersion forces.

11. Chen help!

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3?

12. Chem help

Which reaction of ammonia does not involve the non-bonding pair of electrons on the nitrogen atom? A NH3(g) + CH3I(g) → CH3NH 3+ I –(s) B NH3(g) + HCl (g) → NH4Cl (s) C 2NH3(l) + 2Na(s) → 2NaNH2(s) + H2(g) D 2NH3(aq) + Ag+(aq) → [Ag(NH3)2]+(aq)

13. Physics

A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle of 56° with the horizontal. The coefficient of static friction between the ladder and the ground is 0.36. If your mass is four times that of the ladder,

14. Chemistry

The relative molecular mass of a molecule of chlorine is 72. Which properties of the atoms in this molecule are the same? 1 radius 2 nucleon number 3 relative isotopic mass Answer: 1 only Can someone please explainnn! Thanks :)

15. Physics

You drop a 1.60 kg book to a friend who stands on the ground at distance D = 12.0 m below. If your friend's outstretched hands are at distance d = 1.40 m above the ground (see the figure), (a) how much work Wg does the gravitational force do on the book as

16. CHEM HELP!

A car burning lead-free fuel has a catalytic converter fitted to its exhaust. On analysis its exhaust gases are shown to contain small quantities of nitrogen oxides. Which modifications would result in lower exhaust concentrations of nitrogen oxides? 1 an

17. Chemistry

How are the three types of intermolecular forces similar? How are they different?

18. math

DVD cases are 9/16" wide. If Juan has 60 DVDs, how many will fit on a 2 1/2 feet long shelf?

19. chemistry

If 0.500 mol NaN3 react, what mass in grams of nitrogen would result?

20. pre algebra

1. what is the sum of 5/6 + 2/3? a.1 1/3 b.1 1/2 c.1 2/3* d.1 3/4 2. sylvia has 6 1/2 boxes of chocolate to share at a family picnic. if she gives each person 1/3 of a box, how many people can receive chocolate? a.13* b.17 c.19 d.21 my answer=* please

21. English 12

"Dressing up for the Carnival" by Carol Shields Comment on the title of the story. What is "the carnival"?

22. math

Find the x intercept and the y intercept: x – 5y = –5 I think the y intercept is 1 so do I just substitute?

23. Math

7. Ben earns \$9 per hour and \$7 for each dilivery that he makes. He wants to earn more than \$120 in an 8-hour work day. What is the least number of deliveries he must make to reach his goal? A. 5 B. 6 C. 7 D. 8 E. 10 12. Mark went shopping with \$110 to

24. Chemistry

At 2000°C the equilibrium constant for the reaction is Kc = 2.4 ✕ 103. 2 NO(g) equilibrium reaction arrow N2(g) + O2(g) If the initial concentration of NO is 0.160 M, what are the equilibrium concentrations of NO, N2, and O2? I do not even know how

25. Chem Help!

Which pair of reagents will take part in a redox reaction? A CH3CH2OH + concentrated H2SO4 B CH3CHO + Tollens’ reagent C CH3CO2C2H5 + dilute H2SO4 D CH3COCH3 + Fehling’s solution Ans: B Someone please explain! Thanks! :)

26. Chemistry

How are mm Hg, torr, psi, atm, and Pa related to each other mathematically?

27. math

A farmer planted 3 2/3 acres of oats, 5 3/4 acres of wheat, and 2 5/6 acres of barley. Compute the total number of acres planted?

A New Hampshire resort offers year-round activities: in winter, skiing and other cold-weather activities; and in summer, golf, tennis, and hiking. The resorts operating costs are essentially the same in winter and summer. Management charges higher nightly

30. Algebra

For which value of x must the expression 59x be further simplified? a.10 b.13 c.15 d.18

Explain how gravitational, electrical and magnetic force act on a maglev train?

32. chemistry

Why are the published values of the boiling points of substances always taken at 1 atm?

33. algebra

the last 10% of CRYPTOGRAM II DON'T GET THIS????

34. chemistry

How are mm Hg, torr, psi, atm, and Pa related to each other mathematically?

Cyanohydrins can be made from carbonyl compounds by generating CN– ions from HCN in the presence of a weak base. In a similar reaction, –CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an aldehyde and

36. algebra 1

a roll of carpet 9 ft wide is 30 ft longer than a roll of carpet 15 ft wide. both rolls have the same area. make a sketch and find the dimensions of each.

37. chemistry

Why is carbon dioxide gas that carbonates fountain drinks stored in sturdy canisters?

38. math

I'm working on a project that says "a common bit of financial wisdom is that a car payment should be no more than 20% of your monthly take-home pay. Set up and solve an equation to determine how much you would need to be making in take-home pay each year

39. Physics Helpppp

Q11 a(ii)A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V. The frequency deviation of the carrier wave is 20 kHz V^–1 Describe, for the

40. Chemistry Help!

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3?

41. Chem

Cyanohydrins can be made from carbonyl compounds by generating CN– ions from HCN in the presence of a weak base. In a similar reaction, –CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an aldehyde and

42. Pure Maths

A container is in the shape of a right circular cone (inverted) with both height and diameter 2 meters. It is being filled with water at a rate of (pi)m^3 per minute. Fine the rate of change of height h of water when the container is 1/8th full(by volume).

43. Trigonometry

John stands on top of a little lighthouse looking out at a nearby tall lighthouse that is 200 feet away. He looks at the top of the tall lighthouse with a 3 degree angle of elevation, but looks at the bottom of the tall lighthouse with 6 degree angle of

44. Managerial Economics

As vice president of sales for a rapidly growing company, you are grappling with the question of expanding the size of your direct sales force (from its current level of 60 national salespeople. You are considering hiring from 5 to 10 additional personnel

45. math

Given that R = 3 x + 9 y Find x when y = 6 and R = 7 Give your answer as an improper fraction in its simplest form

46. algebra

A car travels 350 miles on 20 gallons of gallons of gasoline.How many gallons will be used to travel 875 miles under the same conditions

47. Physics Help!

The Fly wheel has a small magnet of mass M mounted on it. Each time the magnet passes the coil, a voltage pulse is generated , which is passes to the c.r.o the display of the c.r.o is 10 cm wide . The flywheel is rotating at a rate of about 3000

48. Math

Write an equation of the line satisfying the given conditions Parallel to the line y=-4x+3 and a y intercept of -5 Please help I am really confused

49. AS Physics

A driver leaves his car without applying the hand brakes on a road inclined at an angle of 25 degrees. The car starts to roll down the road with the driver chasing from behind after moving a distance of 20 m the speed of the car is 5.0 ms-1. Calculate the

50. CHEM HELP :(

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons

51. History---Modern World History

Write a short paragraph that traces the rise of Japan from an isolated society to a major industrial and imperial power. I'm good at writing paragraphs but I really don't understand the question! If someone could explain to me what my teacher wants and how

52. chem

Why do you think water is often called the universal solvent and what makes it such a good solvent?

53. chemistry

Why are the published values of the boiling points of substances always taken at 1 atm?

54. algebra

If it takes 4 ounces of insecticide to make 2/1/2 gallons of garden spray, how much spray can be made with 6 ounces of insecticide My answer was x=24 is it right???

55. Chem

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons

56. Chemistry

Full question: An alcohol of molecular formula C4H10O2 contains two OH groups and has an unbranched carbon atom chain. On reaction with excess hot potassium permanganate this alcohol is converted into a compound of molecular C4H6O4 To which carbon atoms in

57. Physics

A 4.1 kg bundle starts up a 31° incline with 148 J of kinetic energy. How far will it slide up the incline if the coefficient of kinetic friction between bundle and incline is 0.39?

58. Chemistry

The boiling points of the following compounds increase in the order in which they are listed below: CH4 < H2S < NH3 Discuss the theoretical considerations involved and use them to account for this order.

59. Math

Hi! So this question kind of has two parts to it. If someone could help me with this, that would be great! Thanks! :) Juan lives in a large city and commutes to work daily by subway or taxi. He takes the subway 80% of the time because it costs less and he

60. algebra

the ratio of the weight of an object on jupiter to its weight on earth is 8 to 3. how much would a 100 pound person weigh on Jupiter? i`ll tell you the answer when am done solving so you can check if am right

61. geometry

round to the nearest tenth. a rectangular plot of land is 80 meters wide and 98 meters long. Find the length of the diagonal and if necessary, round to the nearest tenth.

62. Math

Jessica wants to seed her backyard with grass seed. Her yard is 120 fet long and 90 feet wide. If Jessica buys bags of seeds that cover 600 square feet, how many bags of seed will she need?

I am very bad at fractions.Can anyone tell me what a multiplication sentance is? The book gave me a model. It is an expression in math or written form. John had 1/2 of the pizza, and he ate 3/8 of that. How much did he eat of the original pizza. 1/2 x 3/8

64. Science

Are euglena unicellular or multicellular? They are unicellular

66. social stody

what parts of canada are good for growing crops

67. Math

Leah liked to balance objects she found around the house using the science kit she got for Christmas. She found that 3 identical apples and a 5-gram weight exactly balanced a 50-gram weight. Leah said she could tell how much each apple weighed by solving

68. World History

Which principle of the Just War Theory is best supported by the declaration of war? Why?

69. Music

What would a researcher who studies the tango dance music of Argentina be called? ethnomusicologist historical musicologist ** i think it is this one musical theorist systematic musicologist

70. Math

How do you find the angle, θ, between the vectors? If needed, round your answer to the nearest tenth. 1.) u = 2i - 3j v = i - 2j 2.) u = v =

71. Math

What does the word benchmark percent means?

72. Chem

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3?

73. AS Chemistry

which ions are present in a solution of ethanol in an excess of concentrated sulphuric acid? 1 CH3CH2O- 2 CH3CH2OH2 3 HSO4- Explain please! Thanks :)

74. statistics

The students in your class with three children in their families are asked to state the number of boys in the family. What are the possible numbers? If X is the number of boys minus the number of girls in each of these families, state all the possible

75. Physics

Two blocks A and B are connected by a light in extensible cord passing over a frictionless pulley. Block A starts from rest and moves up the smooth plane which is inclined at 30 degrees to the horizontal. Calculate at the moment that A has moved 4 m along

76. math

Mrs. Zimmerman spent \$55 at the grocery store. 40% of that she spent on meat. How much did she spent on meat?

77. chemistry

how do i balance SO3 + H2O = H2SO4

78. history

What is Anne franks legacy?

79. Geography

I'm doing mapping and I need to put Bogota, Rio De Janeiro, and Buenos Aires on a map of the western hemisphere. I know if they're in north of south america, but I need exact location by Monday.

80. Math

Becky used 5 teaspoons of mustard to make 32 ounces of potato salad. How many teaspoons of mustard does she need to make 4 pounds of potato salad.

81. math

Estimate each qutioent 35 divided by 4is what

82. geometry

In class we are doing overlapping triangles and I have the measures of the angles I just need to know how to solve if there's an angle that isn't congruent between both sides?? if that makes any sense.

83. Algebra 2

find the real zeros of each polynomial f(x)=5x^3-40 Please show work I want to learn how to did it

84. Math

Direction:Write each power as a product of the same factor. Ten find the value. 1. 3^5

85. Physics

When maximum power is transferred to an external resistor R by a battery of emf E and internal resistance r, the ratio of r/R is? Answer 1:1 Can some please explain? Thankkks!

86. Chem AS

When either chlorine or hydrogen chloride is passed over a heated metal M, the same chloride is produced. An aqueous solution of this chloride is acidic. Which one of the following could be M? A: Al B: Ba C: Cu D: Fe E: Na Ans: A Help w explanation please!

87. Chem AS

On addition of aqueous sodium hydroxide to an aqueous solution of salt R, a white precipitate is obtained, soluble in an excess of the hydroxide. A white ppt is also obtained when R is treated with aqueous ammonia , but it is insoluble in excess. Which of

88. Maths

Mortgage is for \$300,000 for 30 years, Fixed interest rate = 7% per year. Annual payments = \$23,500 At end of 30 years, must make balloon payment. How much is the balloon payment?

89. pre a-p math

a playground is 100ft by 150 ft. you want to make a scale drawing of the playground on a 8.5 by 11 paper what scale could you use? please help

90. CHEM

Pu-239 has a half-life of 24110 y. If 1.00 kg of this isotope is present in the used fuel rods of a nuclear power plant approximately how long will it take for this amount of Pu-239 to decay until there is less than 1 mg left ? Please help. I do not know

91. accounting

1. Describe the roles and responsibilities of management and independent auditors in the financial reporting process 2. Define the following three users of financial accounting disclosures and the relationships among them: a) Financial analysts b) Private

The U.S. cigarette industry has negotiated with Congress and government agencies to settle liability claims against it. Under the proposed settlement, cigarette companies will make fixed annual payments to the government based on their historic market

93. World History

What impact did the everyday Russian citizen have on the Russian Revolution? Does the Russian Revolution show us why history should discuss the everyday citizen and their impact, or should history stick to focusing on the leaders?

94. Vector Calculus

Can someone help me with this please. A vector field in cylindrical polar co-ordinates is given by V = R Rˆ + R 3 s i n ( φ ) c o s ( φ ) φˆ + 3 z kˆ where Rˆ, φˆ, kˆ are the appropriate unit vectors. Translate this vector field into the

95. vector calculus

Can someone help me with this please. A vector field in cylindrical polar co-ordinates is given by V = R Rˆ + R 3 s i n ( φ ) c o s ( φ ) φˆ + 3 z kˆ where Rˆ, φˆ, kˆ are the appropriate unit vectors. Translate this vector field into the

96. Math

The least common multiple of two numbers is 60 and one of the numbers is seven less than the other number what are the numbers? justify your answer

97. Chemistry

How does changing the volume of strontium nitrate solution, added to 8 cm3 of sodium carbonate solution, affect the amount of precipitate formed? Is it the more the strontium nitrate solution is increased, the more precipate formed?

98. bio

which invertebrate phylum contains the sub phylum vertebrata

99. Math

A section of rope is 0.5 feet long. The rope is cut into six equal lengths. How long is each section?

100. Trigonometry

from your apartment balcony, you look down and see two of your friends walking toward your apartment building. As you look East, you see Maria with a 60 degree angle of depression. As you look East, you also see jack with a 45 degree angle of depression.

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