# Questions Asked in August 2012

## Most Popular Questions of August 2012

1. ### English

Write a debate on the topic;Boys should not help in the kitchen.Speak for or against the motion.

asked by Vanessa on August 14, 2012
2. ### Physics

While working on her bike, Amanita turns it upside down and gives the front wheel a counterclockwise spin. It spins at approximately constant speed for a few seconds. During this portion of the motion, she records the x and y positions and velocities, as

asked by Sam on August 19, 2012
3. ### Science(Chemistry)

HCL+Al=AlCl3+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?

asked by Timothy on August 18, 2012
4. ### Math

The grocery store sells kumquats for \$4.25 a pound and Asian pears for \$2.25 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with \$18.

asked by Tony on August 3, 2012
5. ### calculus

The point P(4, −2)lies on the curve y = 2/(3 − x). (a) If Q is the point(x, 2/(3 − x)),use your calculator to find the slope mPQ of the secant line PQ (correct to six decimal places) for the following values of x. 1) 3.9 mPQ= 2) 3.99 mPQ= 3)3.999

asked by student on August 28, 2012
6. ### science

A chair of mass 15.5 is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force = 38.0 that is directed at an angle of 42.0 below the horizontal and the chair slides along the floor.Use Newton's laws to calculate

asked by John on August 3, 2012
7. ### prealgebra

At the same time that a 60-foot tall building casts a shadow that is 21.5 feet long, a nearby tree casts a shadow that is 18 feet long. Which measure is closest to the height of the tree?

asked by Mary on August 15, 2012
8. ### physics 102

The output voltage of an AC generator is given by Δv = (180 V) sin (70πt). The generator is connected across a 13.0-Ω resistor. (a) By inspection, what is the maximum voltage? V (b) By inspection, what is the frequency? Hz (c) Find the rms voltage

asked by Matt Will on August 9, 2012
9. ### physics

a particle is dropped under gravity from rest from a height and it travels a distane of 9h/25 in the last second. Calculate the height h?

10. ### math

How many arrangements can be made using 4 letters of the word HYPERBOLAS if no letter is to be used more than once?

asked by cha-cha on August 2, 2012
11. ### physics

an ideal spring of negligible mass is 12.00 cm long when noting is attached to it. When you hang a 3.15kg weight from it, you measures its length to be 13.40 cm. if you wanted to store 10.0 J of potential energy in this spring, what would be its total

asked by zianna on August 22, 2012
12. ### math 213

The amount of money in cents in a jar containing some nickels and d dimes and some quarters if there are 4 times as many nickels as dimes and twice as many quarters as nickels

asked by susan on August 18, 2012
13. ### PHYSICS

Two bulbs are connected in parallel across a source of emf EMF = 10.0V with a negligible internal resistance. One bulb has a resistance of 3.0 Omega , and the other is 2.5 Omega . A resistor R is connected in the circuit in series with the two bulbs. What

asked by sarah on August 23, 2012
14. ### math

What's the quickest way for an ant to go from the ground to the tree trunk?

asked by ben on August 22, 2012
15. ### English

“The Marginal World” by Rachel Carson Selection Test A Critical Reading Identify the letter of the choice that best answers the question. 1. What is Carson’s main reason for writing about nature in “The Marginal World”? A. to share the meaning

asked by lenecia on August 13, 2012
16. ### biology

1.What is the % concentration of oil in the first, second, and third trophic levels in our food chain? 2.How did the concentration of oil change from one trophic level to the next? 3.How does the change in concentration represent biomagnification? 4.How

asked by kiesha on August 9, 2012
17. ### Physics

A police car traveling at 94.5 km/h is traveling west, chasing a motorist traveling at 77.2 km/h. (a) What is the velocity of the motorist relative to the police car? The magnitude and its direction (b) What is the velocity of the police car relative to

asked by John on August 1, 2012
18. ### chemistry

Two liquids of different densities (ρ1 = 1500 kg/m3, ρ2 = 500 kg/m3) are poured together into a 100 L tank, filling it. If the resulting density of the mixture is 800 kg/m3, find the respective masses of the liquids used.

asked by nick on August 29, 2012
19. ### Physic

You walk 55 m to the north, then turn 60° to your right and walk another 46 m. How far are you from where you originally started? Can someone help me with this question please? I have tried Pythagorean but it did not work. thank

asked by John Yi on August 28, 2012
20. ### chemistry

A chemist must dilute 55.6 ml of 1.48 M aqueous silver nitrate (AgNO3) solution until the concentration falls to 1.00M. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in

asked by Lizzy on August 31, 2012

Jeff Jones earns \$1,200 per week. He is married and claims four withholding allowances. The FICA rate is as follows: Social Security rate is 6.2% on \$97,500; Medicare rate is 1.45%. To date his cumulative wages are \$6,000. Each paycheck, his employer also

asked by no name on August 31, 2012
22. ### chemistry

A volume of 100mL of 1.00 M HCl solution is titrated with 1.00 M NaOH solution. You added the following quantities of 1.00 M NaOH to the reaction flask. Classify the following conditions based on whether they are before the equivalence point, at the

asked by Anon on August 6, 2012
23. ### physics

A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?

asked by Ben on August 13, 2012
24. ### English

In the following sentence, identify the part of speech of the italicized word. Thousands of years ago, fish were caught in nets and traps. A. Verb B. Preposition C. Pronoun D. Conjunction Is it B?

asked by Sara on August 16, 2012
25. ### Chemistry

Balance the equation and then write the net ionic equation a. (NH4)2 CO3(aq) + Cu(NO3)2(aq) to CuCO3(s) + NH4NO3(aq)

asked by PJcotieboi on August 20, 2012
26. ### math

Your iron works has been contracted to design and build a 500-ft3 square-based, open-top, rectangular steel holding tank for a paper company. The tank is to be made by welding half-inch-thick stainless steel plates together along their edges. As the

asked by ibranian on August 7, 2012
27. ### chemistry

How many moles of HNO3 are present if 0.236mol of Ba(OH)2 was needed to neutralize the acid solution?

asked by Anon on August 6, 2012

Explain the types of Signals & Towers used in triangulation.

asked by rakesh on August 7, 2012
29. ### MATH

You wish to mentally estimate the total cost of items that have the following prices: \$1.85, \$.98, \$3.49, \$9.78, and \$6.18. Rounding off the items to the nearest half-dollar, your estimate of the total cost of these items is A. \$22.50. B. \$22.30. C.

asked by Sara on August 18, 2012
30. ### algebra

ABC and DCB are right angles .That A and D respectively.And AC=DB. Prove that angle ABC is equal to angle DCB?

asked by TUHITUHI on August 15, 2012
31. ### chemistry

How many moles of chloride ions are present in 18.4g of CaCl2? I don't know how to set this up...

asked by lola on August 4, 2012
32. ### geometry

Campsite F And G Are On Opposite Sides Of The Lake.A Survey Crew Made Measurements Shown On The Diagram .What Is The Distance Between The Two Campsites?

asked by emma on August 17, 2012
33. ### Literature- Urgent!!

Can anyone help me find a hyperbole in the book the lord of the flies, please? I've been trying to find one for the past two months! And now, school is about to start. The quotation, page number and a brief summary would be appreciated!!

asked by IB student on August 10, 2012
34. ### physics

A small mailbag is released from a helicopter that is descending steadily at 1.01 m/s. (a) After 4.00 s, what is the speed of the mailbag? v = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the

asked by roger on August 30, 2012
35. ### Chemistry 2

Supposed you stoppered the flasks after your titration to determine the equilibrium constant and kept the solutions for another day so that the equilibrium was re-established. What would happen to the amount of ethanol present? What would be the

asked by Robert on August 3, 2012
36. ### Physics

A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 0.8 m/s2 for 4.4 seconds. It then continues at a constant speed for 13.5 seconds, before getting tired and slowing

asked by David on August 27, 2012
37. ### precalc

use power reducing identities to prove the identity sin^4x=1/8(3-4cos2x+cos4x) cos^3x=(1/2cosx) (1+cos2x) thanks :)

asked by skye on August 16, 2012
38. ### physics

A plane traveling at 80 m/s lands on a runway and comes to rest after 10 seconds. What was the plane's deceleration

asked by d mac on August 31, 2012
39. ### Physics - Electromagnetism

A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant when the angle between the field and the normal to the plane of the loop is equal to 20 and increasing at the rate of

asked by Robert on August 12, 2012

Consider the reduction of 4-t-butylcyclohexanone. If the procedure calls for 153 mg of 4-t-butylcyclohexanone, what mass of sodium borohydride should be added?

asked by Hannah on August 19, 2012
41. ### Algebra

Please let me know if i answered these correctly thanks 1.Which property of the real numbers is illustrated by the following statement? 4(3x) = (4 ∙ 3)x answer: distributive property 2. Which property of the real numbers is illustrated by the following

asked by Ron on August 3, 2012
42. ### maths

prove that tan(45+theta)+tan(45-theta)=2sec2theta

asked by tina on August 10, 2012
43. ### statistics/ Help!-thanks!

The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people use the new toothpaste for 6 months. The mean number of cavities at their next check up is 1.5. In the general population

asked by StudentD on August 25, 2012
44. ### Physics

Assume that 0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20° C. The gas then undergoes isobaric heating to a temperature of 300° C. What is the final pressure of the gas? What is the final volume?

asked by VW on August 4, 2012
45. ### physics

A locomotive is pulling 17 freight cars, each of which is loaded with the same amount of weight. The mass of each freight car (with its load) is 37,000 kg. If the train is accelerating at 0.7 m/s2 on a level track, what is the tension in the coupling

46. ### chemistry

Determine the electron geometry, molecular geometry, and idealized bond angles for each of the following molecules. In which cases do you expect deviations from the idealized bond angle?1.pf3 2.sbr2 3.ch3br 4.bcl3

asked by ana on August 23, 2012
47. ### Statistiscs

Students in the psychology department consume an average of 5 cups of coffee per day with a standard deviation of 1.75 cups. The number of cups of coffee consumed is normally distributed. • What proportion of students consume an amount equal to or less

asked by StudentD on August 28, 2012
48. ### math

In the following, write an expression in terms of the given variables that represents the indicated quantity: a. The cost of having a plumber spend h hr at your house if the plumber charges \$30 for coming to the house and \$x per hour for labor b. The

asked by mary on August 18, 2012
49. ### physics

An object moves with constant acceleration 3.65 m/s2 and over a time interval reaches a final velocity of 10.4 m/s. (a) If its initial velocity is 5.2 m/s, what is its displacement during the time interval? m (b) What is the distance it travels during this

asked by roger on August 30, 2012
50. ### Science

A car starts from rest and moves with constant acceleration during the 5th second of its motion,it covers a distance of 36 meters. what is the acceleration

asked by Mariam on August 31, 2012
51. ### Chem

Consider the reduction of 4-t-butylcyclohexanone. If the procedure calls for 153 mg of 4-t-butylcyclohexanone, what mass of sodium borohydride should be added?

asked by Hannah on August 18, 2012
52. ### chemistry

How do you make a venn diagram of the 6 branches of chemistry? (Inorganic chemistry, organic chemistry, biochemistry, nuclear chemistry, physical chemistry, and analytical chemistry) like where would they go in the 3 circles

asked by jake on August 26, 2012
53. ### math

Your company can make x-hundred grade A tires and y-hundred grade B tires a day, where 0≤x≤4 and y= (40-10x)/(5-x). The profit on each grade A tire is twice the profit on each grade B tire. Assuming all tires sell, what are the most profitable numbers

asked by ibranian on August 7, 2012
54. ### algebra 2

what is the answer for "what might you have if you don't feel well ?

asked by jocelynn on August 29, 2012
55. ### physics

a wire under tension vibrates with a fundamental frequency of 256Hz. what would be the fundamental frequency if the wire were half as long, twice as thick, and under 1/4 tension?

asked by Anonymous on August 16, 2012
56. ### Chemistry

What will happen when 100 ml of diethyl ether are added to 100 ml of water and thoroughly mixed? a.) Water will form a separate layer on top of the ether layer. b.)The temperature of the mixture will significantly increase. c.)There will be a chemical

asked by Anna on August 12, 2012
57. ### Physics

A. A baseball is seen to pass upward by a window 28.1 m above the street with a vertical speed of 13.7 m/s. If the ball was thrown from the street, what was its initial speed? B. What altitude does it reach? C. How long before the ball passed the window

asked by Ashley on August 21, 2012
58. ### Math

Find the 95% confidence interval for the standard deviation of the lengths of pipes if a sample of 26 pipes has a standard deviation of 10 inches

asked by Anonymous on August 3, 2012
59. ### chemistry

Find the number of disintegrations per minute emitted by 1.1 mol of 232-Th in 1 min. The half-life of 232-Th is 1.4 x 1010 year I was able to do this with the following technique: 1.1 x 6.022 x10^23 =6.62x10^23 1.4x10^10=7.358x10^15 minutes I think then it

asked by Nancy on August 2, 2012
60. ### Pre-Calculus

Find the maximum and minimum values of the function for the polygonal convex set determined by the given system of inequalities. x + y > 2 8x – 2y < 16 4y < 6x + 8 f(x, y) = 4x + 7y

asked by Zakiyyah on August 29, 2012
61. ### english

The textbook stresses that your writing Fill in the Blank 01; that is, you must have "a goal of demonstrating the truth of your conclusions and clarifying and illuminating your idea about the topic and also about the work."

asked by Anonymous on August 30, 2012
62. ### french

I want to learn french how can I start please advise me thank you

asked by Anonymous on August 24, 2012
63. ### Chemistry

38.0kg mass of copper is melted to be cast into a graphite mold at a copper pipe foundtry. If the solid copper starts off at the normal melting temperature of copper and the liquid copper is put into the mold at the crystallization point of copper, how

asked by Jacob on August 15, 2012
64. ### math

An 8 ft wall stands 27 ft from a building. Find the length of the shortest straight beam that will reach to the side of the building from the ground outside the wall.

asked by rolan on August 10, 2012
65. ### Calculus

The percentage of the moon's surface that is visible to a person standing on the Earth varies with the time since the moon was full. The moon passes through a full cycle in 28 days, from full moon to full moon. The maximum percentage of the moon's surface

asked by Jillian on August 23, 2012
66. ### Chemistry

Suppose you have a strong peak at 2230 cm–1. What is the wavelength of the radiation that was absorbed?

asked by Jen on August 25, 2012
67. ### College Algebra

The area of a rectangular wall of a barn is 24 square feet. Its length is 8 feet longer than twice its width. Find the length and width of the wall of the barn

asked by Lucy on August 15, 2012
68. ### math

Assume that a dart is randomly thrown at the dartboard shown here and strikes the board every time. The payoffs are listed on the board. How much should you be willing to pay for the opportunity to play this game? (Give your answer to the nearest cent.)

asked by Anonymous on August 30, 2012
69. ### math

How many edges are in K15, the complete graph with 15 vertices. Any help would be appreciated, thanks.

asked by Meredith on August 25, 2012
70. ### chemistry

The reaction of 9.3 grams of ﬂuorine with excess chlorine produced 4.1 grams of ClF3. What percent yield of ClF3 was obtained?

asked by Nick on August 30, 2012
71. ### physics

A passenger on an interplanetary express bus traveling at = 0.95 takes a 9.0-minute catnap, according to her watch.How long does her catnap from the vantage point of a fixed planet last?

asked by julie on August 10, 2012
72. ### physics

Starting from rest, a boat increases its speed to 4.92 m/s with constant acceleration. (a) What is the boat's average speed? (b) If it takes the boat 5.07 s to reach this speed, how far has it traveled?

asked by stoic-rider77 on August 29, 2012
73. ### math

The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria triples every 30 sec. (Hint: The answer should contain q as well as n.)

asked by mary on August 18, 2012
74. ### art history

Imagine that you are a prehistoric artist and write a 350 to 500 word story explaining why you are an artist and what the purpose of your art is. Be clear about what time period and location you are from. You may do research about prehistoric art, but be

asked by Help!! on August 14, 2012
75. ### Chemistry IR Spectroscopy

Sort the compounds: conjugated or non conjugated. -but-2-enoic acid -butanoic acid -hex-4-en-3-one -hexan-3-one

asked by Jen on August 25, 2012
76. ### Physics

In the school cafeteria, a trouble-making child blows a 12.0 g spitball through a 25.0 cm straw. The force of her breath as a function of the distance along the length of the straw can be modeled as 10-50x^2-70x^3 where force is in newtons and x is in

77. ### physics

A 10kg runaway grocery cart runs into a spring with spring constant 260 n/m and compresses it by 50 cm . Part A What was the speed of the cart just before it hit the spring?

asked by shari on August 7, 2012
78. ### math

1. Find the LCD of 3/5 and 1/6. a. 5 b. 6 c. 11 d. 30 2 Add the fractions and write your answer in lowest terms. 2/5 + 1/9 a. 1/15 b. 23/45 c. 3/14 d. 19/45 3. Subtract the fractions and write your answer in lowest terms. 4/5 - 3/8 a. 1/40 b. 1 7/40 c.

asked by Nyla on August 29, 2012
79. ### Statistics

A random sample of forty-eight 200 meter swims has a mean of 3:12 minutes and a standard deviation of .09 minute. Construct a 95% confidence interval for the population mean time. I know u: 3.12, sx: .09, n:48, c:.95 What is the formula I use to find the

asked by Brian on August 1, 2012
80. ### math

Leslie has been offered the choice of either a \$1,000 rebate or a 5.5 percent, 48-month loan for the new car she is purchasing. If Leslie will be financing \$15,000 and she can get a 7.5 percent, 48-month loan at her credit union, should she take the \$1,000

asked by Steven on August 5, 2012
81. ### Math

Joelle earns her regular pay of 7.50 per hour for up to 40 hours a week. for each hour over 40 hours of work in a week, joelle is paid 1.5 times her regular pay. how much does joelle earn for a week in which she works 42 hours?

asked by David on August 14, 2012
82. ### writing skills

7. The best way to ensure parallel construction in your essay is to use similar A. paragraph lengths. [B. sentence structure throughout.] C. topic headings in your outline. D. details in each paragraph.

asked by jake on August 23, 2012
83. ### CHEMISTRY

The standard molar entropy of lead(II) bromide (PbBr2) is 161 J/mol • K. What is the entropy of 2.45 g of PbBr2? a. +1.07 J/K d. –161 J/K b. –1.07 J/K e. 0 J/K c. +161 J/K

asked by MONICA on August 1, 2012
84. ### chemistry

treatment of a 0.400g sample of impure potassium chloride with an excess of AgNO3 resulted in the formation of 0.733g of AgCl. calculate the percentage of KCl in the sample. show balanced equations in support of your answer

asked by Andrea on August 15, 2012
85. ### sig figs

I am having trouble with my sig figs Many scientific data are reported at 25°C. What is this temperature in kelvins and in degrees Fahrenheit? I got 3.0e2 degrees kelvin since it will have to have two sig figs but it said it was wrong

asked by Hannah on August 15, 2012
86. ### math

The stiffness S of a rectangular beam is proportional to its width (w) times the cube of its depth/height (h). find the dimensions (i.e.: w and h) of stiffest beam that can be cut from a log which has a circular cross-section with diameter of 12-in.

asked by deel on August 9, 2012
87. ### Calculus

(a) By graphing the function f(x) = (cos 2x − cos x)/x2 and zooming in toward the point where the graph crosses the y-axis, estimate the value of lim x → 0 f(x). (b) Check your answer in part (a) by evaluating f(x) for values of x that approach 0.

asked by Anonymous on August 30, 2012
88. ### Algebra

Find k, given that (2,k) is equidistant from (3,7) and (9,1). The answer is : k=0 How do I solve this problem?

asked by Alex on August 13, 2012
89. ### physics

A 1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30 ° below thehorizontal just before it strikes a horizontal surface. The ball leaves this surface 0.50 slater with a velocity of 2.0 m/s directed 60 ° above the horizontal. What is

asked by Ben on August 12, 2012
90. ### college chemistry

Rank from highest to lowest vapor pressure.CH3CH2CH2CH2OH,CH4,CH3CHCH2CH3CH3,CH3CH2CH2CH2CH3

asked by deb on August 31, 2012
91. ### physics

Find the Magnitude of the force exerted by each cable to support the 625 N punching bag. One cable is connected to the ceiling with an angle of 37 degrees and the other cable is connected perpendicular to the side wall (Horizontal). HELPP

asked by kacey on August 9, 2012
92. ### statistic

A researcher conducts an experiment comparing three treatment conditions with a separate sample n = 8 in each treatment. An analysis of variance is used to evaluate the data, and the results of the ANOVA are presented in the table below. Complete all

asked by jay on August 28, 2012
93. ### chemistry

A solution of sodium cyanide NACN has a PH of 12.10. How many grams of NACN are in 425ml of solution with the same PH? Please helps me to solve it for me

asked by Fai on August 5, 2012
94. ### physics

Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. The initial speeds are such that both arrows reach their maximum heights at the same instant, although these heights are

asked by Anonymous on August 26, 2012
95. ### american history

Which of the following statements is true of the Gulf of Tonkin affair? A. Congress was divided and only reluctantly passed the Gulf of Tonkin Resolution. B. The destroyer Maddox was sunk by North Vietnamese gunboats. C. Johnson approved covert amphibious

asked by hilorie on August 26, 2012
96. ### Chemistry

500ml of 0.250M Na2SO4 solution is added to an aqueous solution of 15.00 g of BaCl2 resulting in the formation of white precipitate of BaSO4. How many moles and how many grams of BaSO4 are formed?

asked by Natasha on August 9, 2012
97. ### Chem

What is the PH of 0.40 M Na2SO3? (K1 for H2SO3 = 1.5 * 10^-2; K2 = 1.0 * 10^-7

asked by XIA on August 2, 2012
98. ### math

A spherical baloon expands when it is taken from the cold outdors to the inside of a warm house. if its suface area increases 16%, by what percentage does the radius change

asked by tasha on August 24, 2012
99. ### math

A silo is to be made in the form of a cylinder surmounted by a hemisphere. The cost of construction per square foot of surface area is twice as great for the hemisphere as for the cylinder. Determine the dimensions to be use (in terms of V) if the volume

asked by ibranian on August 7, 2012
100. ### Chemistry

Assume the solubility of benzoic acid in ice-cold water is 1.70 g/L and the solubility of benzoic acid in hot water is 68.0 g/L. Calculate the minimum volume of water (in mL) needed to recrystallize 0.950 g of benzoic acid.

asked by Jen on August 12, 2012