# Questions Asked in December 2008

## Most Popular Questions of December 2008

1. ### Physics - Buoyant Force

A piece of metal weighs 50.0 N in air, 36.0 N in water, an 41.0 N in an unknown liquid. Find the density of the unknown liquid.

asked by Phillip on December 16, 2008
2. ### algebra with pizzazzi

Do Elephants know how to gamble

asked by lizzy on December 5, 2008
3. ### help plzzz

ALGEBRA PIZZAZZ: IN MUSIC, WHAT DOES "ALLEGRO" MEAN?

asked by jessica on December 3, 2008
4. ### physics

A rectangular trough, 2.0 m long, 0.50 m wide, and 0.50 m deep, is completely full of water. One end of the trough has a small drain plug right at the bottom edge. When you pull the plug, at what speed does water emerge from the hole? (in m/s)

asked by Sandhya on December 5, 2008
5. ### math

you want to draw an enlargement of a design that is printed on a card that is 4 in. 5 in. you will be drawing this on a piece of paper that is 8 1/2 in. by 11 in. what are the dimensions of the largest complete enlargement you can make??? plz include

asked by asha on December 9, 2008
6. ### Walquist

Geometry question. a Math riddle. What does a cat need to play baseball?

asked by Jim on December 8, 2008
7. ### 11th grade CHEMISTRY TITRATION LAB!

i have a tritation lab due tomorrow and i am stumped on a couple things. its a titration lab using sodium hydroxide (NaOH)- 250 mL 0.300 M concentration, 10 mL of an unknown substance of vinegar, the avg. of titrated NaOH in the flask with vinegar is 27.7

asked by student on December 14, 2008

Surface ocean currents located at 40 degrees south latitude and 90 degrees west latitude generally flow toward the (1) northeast (2) southeast (3) southwest (4) west

asked by Angie on December 27, 2008
9. ### physics

A horizontal disc rotating freely about a vertical axis makes 90 revolutions per minute. A small piece of wax of mass “m” falls vertically on the disk & sticks to it at a distance “r” from the axis. If the number of revolutions reduces to 60, then

asked by hriday on December 30, 2008
10. ### biology

Bromothymol blue (BTB) is a chemical that turns yellow in the presence of carbon dioxide. In the presence of oxygen, BTB stays blue. In his science class, Sanjay used BTB to test for the presence of those two gases in three situations. *Sanjay's Procedure*

asked by Cody on December 17, 2008
11. ### Physics

A crate is pulled right with a force of 82.0N to the left wtih a force of 115N upward with a force of 565N and downward with a force of 236N Fine the net external force in the X direction Find the net external force in the y direction find the the

asked by Physics on December 14, 2008
12. ### Chemistry

BrO3- + 5Br- + 6H+ 3Br2 + 3H2O If 25.0 ml of 0.200-molar BrO3- is mixed with 30.0 ml of 0.45-molar Br- solution that contains a large excess of H+, what is the amount of Br2 formed, according to the above equation? The answer is 0.00810 moles but I don't

asked by Andrew on December 16, 2008
13. ### Chemistry

what is the name for the following coordination compounds or ions? 1. [Al(H2O)6] Br3 2. [Cr(NH3)6] Cl3 3. K3[FeF6] 4. [Zn(OH)4]-2

asked by Rachel on December 4, 2008
14. ### chemistry

how many grams of glucose are required to produce 50mL of 0.1 m solution?

asked by kelsie on December 3, 2008
15. ### Physics

A simple pendulum consists of a 3 kg point of mass hanging at the end of a 2 m long light string that is connected to a pivot point. a. Calculate the magnitude of the torque (due to gravitational force) around this pivot point when the string makes a 5

asked by Kathrine on December 7, 2008
16. ### Math

The leaning tower of Pisa is 55.9 m tall and leans 5.5 degrees from the vertical. If its shadow is 90 m long, what is the distance from the top of the tower to the top of the edge of its shadow, assuming the ground around the tower is level?

asked by Pam on December 19, 2008
17. ### Chemistry

Calculate the heat released when 25.0 grams of water freezes at 0 degrees celsius.

asked by Completely Lost on December 28, 2008
18. ### physics

A 1175 kg car carrying four 82 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude when its speed is 24 km/h. The car now stops,

asked by johnny on December 11, 2008

2. A .12 kg ball is moving at 6 m/s when it is hit by a bat, causing it to reverse direction and have a speed of 14 m/s. What is the change in the magnitude of the momentum of the ball? 4. Lonnie pitches a baseball of mass .2 kg. The ball arrives at home

asked by kim on December 3, 2008
20. ### chemistry

the specific heat of a gas is found to be 0.075 calories at constant volume & its formula weight is 40. the atimicity or the valency of the gas is ............

asked by hriday on December 27, 2008
21. ### Science, Chemistry

I have been told that to prepare 1L of 70% H2SO4 from concentrated sulphuric acid (96% with density 1.84g/ml), I should use the following equation to find out the volume of conc. acid needed (Vml). V x 1.84 x 0.96={(1000-V)+ 1.84V}0.7 i.e. V= 594ml of conc

asked by Tricia on December 3, 2008
22. ### physics

In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. Suppose the slope angle is è = 37.5°, the snow is dry snow with a coefficient of kinetic friction ìk = 0.0400, the mass of

asked by johnny on December 13, 2008
23. ### Math

Two spotlights, one blue and the other white, are placed 6 m apart on a track on the ceiling of a ballroom. An observer standing on the ballroom floor sees that the angle of elevation is 45 degrees to the blue spotlight and to degrees to the white one. How

asked by Linda on December 19, 2008
24. ### Science

How do I prepare 1% H2SO4 from concentrated sulphuric acid (96% with density 1.84g/ml)? Thank you very much for your help.

asked by Tricia on December 2, 2008
25. ### Chemistry

Hey, for chemistry class we are given days in the lab to conduct an experiment, then answer a number of questions that correlate with that experiment and how we can make use of it. This week we looked at the Molar Fusion of Ice and there are some questions

asked by Cody on December 15, 2008

Refer to Figure 4. Assume that Cliff and Paul were both producing wheat and corn, and each were dividing their time equally between the two. Then they decide to specialize in the product they have a comparative advantage in. As a result, total production

asked by Anonymous on December 6, 2008
27. ### Physics

A woman on a bridge 90.0m high sees a raft floating at a constant sped on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 6.00m more to travel before passing under the bridge. The stone

asked by mary on December 28, 2008
28. ### chemistry

are these right? How many atoms are there in 1.3x10^22 molecules NO2? atoms=(1.3x10^22 molecules NO2) x (2atoms/1molecule) = 2.6x10^22 atoms NO2 A 5.0g sample of O2 is in a container at STP. How many atoms of oxygen are in the container? atoms = (5.0g O2)

asked by s on December 14, 2008
29. ### math

what is the cost of tiling a rectangular plot of land 500m long and 200m wide at the rate of rs 8 per hundred sq m?

asked by mimo on December 23, 2008

the population of a town is decreasing at a rate of 1.8% per year. The current population of the own in 12000. a)write and equation that models the population of the town b)how long will it take for the population to decline to one quarter of its current

asked by james on December 10, 2008
31. ### Math

a gasoline pump delivers 4 2/5 gallons of gas per minute. How many minutes will it take to fill a gas tank that holds 16 1/2 gallons?

asked by Andy on December 11, 2008
32. ### calculus

at a given instant the legs of a right triangle are 5cm and 12 cm long. if the short leg is increasing at the rate of 1cm/sec and the long leg is decreasing at the rate of 2cm/sce, how fast is the area changing

asked by mark on December 4, 2008
33. ### physics

A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 1.85 s later. How deep is the ocean at this point?

asked by Sandhya on December 9, 2008
34. ### physics

The mean distance of the planet Neptune from the Sun is 30.05 times the mean distance of Earth from the Sun. a.) Determine how many Earth-years it takes Neptune to orbit the Sun. b.) The mass of the Sun is 1.99 x 10^30 kg, and the closest distance of

asked by Michelle on December 16, 2008
35. ### math

what do you call it when someone pays back a loan quickly

asked by mm on December 15, 2008
36. ### Animal Farm

According to Benjamin, what is the one unalterable law? How does his idea compare to actual conditions in the Soviet Union today? --------------------------------------------------------------------------------------- This is the passage this question is

asked by Emily on December 7, 2008
37. ### chemistry

how many moles of oxygen atoms does 1.2x10^25 diphosphorus pentoxide molecules have? hwo many oxygen atoms are in 1.25 mol sulphur trioxide? i don't understand these

asked by lisa on December 4, 2008
38. ### physics

The position of a particle moving along an x axis is given by x = 15t2 - 2.0t3, where x is in meters and t is in seconds. (a) Determine the position, velocity, and acceleration of the particle at t = 3.0 s. x = m v = m/s a = m/s2 (b) What is the maximum

asked by help on December 14, 2008
39. ### science

Where in the United States is there measurable evidence that the plates are moving realtive to one another?

asked by Anonymous on December 6, 2008
40. ### math

the purchase value of an office computer is 12,500. Its annual depreciation is \$1875. find the value of the computer after 6 years..

asked by Anonymous on December 15, 2008
41. ### Chemistry pls help

I have a chemistry question Please advise how do I prepare 1L of 75% H2SO4 from concentrated H2SO4 (98% of density 1.84g/ml)? Do you have an equation which i can use? Someone gave me the following equation but I do not understand it. Vx1.84x0.98={(1000-V)+

asked by tricia on December 3, 2008
42. ### English

Queen Elizabeth II came to Korea on April 21st, 1999. 1. Queen Elizabeth Two 2. Queen Elizabeth the Second (How do we read 'Queen Elizabeth II? #1 or #2?)

asked by John on December 8, 2008
43. ### physics

2. a 755N diver drops from a board 10.0 m above the water's surface. Find the divers speed 5.00 m above the water's surface. then find the diver's speed just before striking the water. 3. if the diver in item 2 leaves the board with an initial upward speed

asked by gaby on December 4, 2008
44. ### physics

A firefighter with a weight of 722 N slides down a vertical pole with an acceleration of 3.11 m/s2, directed downward. (a) What are the magnitude and direction of the vertical force (use up as the positive direction) exerted by the pole on the firefighter?

asked by johnny on December 11, 2008
45. ### english

Ok, I really need help with this one. I need to finish this Lesson, I have an exam tomorrow..I need to understand what this poem "Lake of Bays" by Raymond Souster mean. This girl is jumping from the railing, does that mean she died, or it's just for fun?

asked by Yana on December 17, 2008
46. ### ap biology

Meiosis reduces chromosome number and rearranges genetic information. a. Explainhow the reduction and rearrangement are accomplished in meiosis.

asked by Yaneth on December 7, 2008
47. ### geometry

The Hubble Space Telescope is orbiting Earth 600 km above Earth's surface. Earth's radius is about 6370 km. Use the Pythagorean Theorem to find he distance a from the telescope to Earth's horizon. Round your answer to the nearest ten kilometers.

asked by sarah on December 9, 2008
48. ### the novel

After having lived with her for a year, Chad studied Marilou's eyes across the table, realizing he had never had a clue about what make her tick." This sentence from a hypothetical novel suggests what kind of narrative voice?

asked by Anonymous on December 12, 2008
49. ### Calculus

If x + 7y = 29 is an equation of the line normal to the graph of f at the point (1,4), then f'(1) = PLEASEEE HELP!

asked by Nina on December 2, 2008

Math has a 150 page book. he has read 1/3 of it. How many pages has he read so far? Is 50 the correct answer?

asked by Hayley on December 15, 2008
51. ### Trig

Find all the solutions in the interval [0,2pi). 2sin2x - sqrt(2) = 0 sin2x = sqrt(2)/2 I'm confused by the double angle. Please help.

asked by Travis on December 2, 2008
52. ### PHYSICS 102E

a brass ring of diameter 10.00cm at 20.0 degrees Celsius is heated and slipped over an aluminum rod of diameter 10.01cm at 20.0 degrees Celsius. Assuming the average coefficients of linear expansion are constant, (a) to what temperature must this

asked by Akitsuke on December 13, 2008
53. ### physics

Panic escape. The figure below shows a general situation in which a stream of people attempt to escape through an exit door that turns to be locked. The people move toward the door at speed vs = 3.7 m/s, are each d = 0.20 m in depth, and are separated by L

asked by john on December 14, 2008
54. ### PHysics

a 15g bullet strikes and becomes embedded in a 1.1kg block of wood placed on a surface in front of the gun. if the coefficient of kinetic friction between the block and the surface is 0.25 and the impact drives the block a distance of 95m before it comes

asked by Anne on December 6, 2008

the function S(d)=93logd+65 relates the speed of the wind, S, in mile per hour, near the centre of a tornado to the distance that the tornado travels, d, in miles. a)Calculate the avg. rate of change for the speed of the wind at the centre of a tornado

asked by james on December 10, 2008
56. ### physical science

List the two equivalent conversion factors for the molar mass of silver, Ag.

asked by Jameisha on December 4, 2008
57. ### chemistry

Please help ~~ Because i don't ever know the reaction in organic compound .. Do anyone has the data bank of the organic chemicals ? I cannot find out what are the compound in the reaction with it ~~ 1. What do butylamine give when it is dissolved in water

asked by initial D on December 4, 2008
58. ### math

how can i rearrange R=pl/A to make p the subject. thx Bronson.

asked by bronson on December 15, 2008
59. ### Social Studies

What basic problem confronted the Puritans who wanted to migrate to America? a. They didn't have enough money to survive in the harsh environment of New England. b. Many people feared the danger of going to the colonies after the Mohawk revolt. c. King

asked by John on December 4, 2008
60. ### 12th Calculus

water drains fromteh conical tank shown in the figure at the rate of 5 ft^3/min. a. what is the relation between the variables h and r? b. how fast is the water level dropping when h =6ft?

asked by may on December 3, 2008
61. ### physics

An automobile can be considered to be mounted on four identical springs as far as vertical oscillations are concerned. The springs of a certain car are adjusted so that the oscillations have a frequency of 3 Hz. (a) What is the spring constant of each

asked by johnny on December 11, 2008

balance Al+CuSO2=Al2(SO4)3+Cu

asked by taylor on December 10, 2008
63. ### math

2 cubes whose faces are numbered 1 through 6 are tossed. what is the probability that both cubes show the same number? 1 36 2 6/36 3 1/36 4 5/6

asked by Anonymous on December 15, 2008
64. ### physics

a very light rigid rod with a length of .500m extends straight out from one end of a meterstick. the meterstick is suspended from a pivot at the far end of the rod and is set into oscillation. determine the period of oscillation (hint: use the

asked by Mischa on December 4, 2008
65. ### Chemistry

How Many Molecules are contained in 0.25 moles of Fe?

asked by Zach on December 11, 2008
66. ### Physics

a rocket following a parabolic path through the air suddenly explodes into many pieces. what can you say about the motion of this system. and If only an external force can change the momentum of the center of mass of an object, how can the internal force

asked by Steve on December 6, 2008
67. ### Chemistry help needed

How do I prepare 90% formic acid from conc. formic acid (98%-100% of density 1.22g/ml)? Please help me check if my calculations are correct. Assuming conc. formic acid is 99%, 0.99 X 1.22 = 1.2078 Add 1.2078 / 9 = 0.1342ml H2O to 1ml of conc. acid to have

asked by tricia on December 17, 2008
68. ### indices

Find a common factor of (527 to the power 379 + 473 to the power 379) and (527 to the power 166 - 473 to the power 166)

asked by rakesh on December 13, 2008
69. ### Microeconomics [Urgent!]

I have an exam tomorrow and I really need to know how you get the following answers. Please show me! I know it's a lot of questions, but I don't understand how you get the answer... ------------------ 40. At Nick's Bakery, the cost to make his homemade

asked by Anonymous on December 8, 2008
70. ### physics

asked by rory on December 14, 2008
71. ### Chemistry

suppose that you have a n unlimited supply of copper II chloride to react with iron. how manyt moles of copper would be produced by reacting 34.0g of iron with the copperII chloride solution?

asked by Lily on December 10, 2008
72. ### chemistry

1. how many grams are in 5.66 mol of CaC03 (3 is the subscript)? --------------------------------------- mass= 5.66 mol CaCO3 x mass/1 mol CaCO3 How do i finish this off? 2. find the number of moles in 508g of ethanol (C2H6O)? 2 and 6 are subscripts

asked by STEPHANIE on December 10, 2008
73. ### Potassium (chem)

Confirm that the experimentally observed electronic configuration of K, 1s22s22p63s23p64s1 is energetically more stable than the configuration 1s22s22p63s23p63d1. __ i know that it is energetically more stable for the electron to occupy the 4s orbital than

asked by Kimora on December 10, 2008
74. ### Calculus

Let f be the function given by f(t) = 2ðt + sin(2ðt) a) Find the value of t in the open interval (0,20 for which the line tangent at (t, f(t)) is parallel to the line through (0,0) and (2,4ð) b) Suppose the given function describes the position of a

asked by Aaron on December 19, 2008
75. ### spelling paragraph

I need to write a paragraph using the following words, acculturation,affable, aggrandize, approbation, callow, erudite, expedite, hackneyed, innuendo, inscrutable, intercede, peculate, querulous, remonstrate, repudiate, resilient, sedulous, tenuous Could

asked by Bill on December 7, 2008
76. ### math

Carl drove from his house to work at an average speed of 35 miles per hour. The drive took him 25 minutes. If the drive home took him 30 minutes and he used the same route in reverse, what was his average speed going home?

asked by Jen on December 31, 2008
77. ### statistics

The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability that a person would score 130 or more on the test?

asked by Robby on December 8, 2008
78. ### physics

The Sun and Earth each exert a gravitational force on the Moon. What is the ratio FSun/FEarth of these two forces? (The average Sun-Moon distance is equal to the Sun-Earth distance.)

asked by johnny on December 6, 2008
79. ### Economics

1. Suppose that the money supply is currently \$500 billion and Fed wishes to increase it by \$100 billion. Given a reserve ratio of 0.25 what should it do? 2. Determine the impact on each of the following if 2 million formerly unemployed workers decide to

asked by woedred on December 7, 2008
80. ### PHYSICS 102E

1. A glass flask whose volume is exactly 1000cm^3 at 0 degrees Celsius is completely filled with mercury at this temperature. When the flask and mercury are heated to 100 degrees Celsius, 15.2cm^3 of mercury overflow. If the coefficient of volume expansion

asked by Akitsuke on December 13, 2008

10% (m/m) sodium hydroxide solution, NaOH, is used to break down wood fibre to make paper. a) What mass of solute is needed to make 250mL of 10% (m/m) solution? b) What mass of solvent is needed? c) What is the molare concentration?

asked by Kairi on December 10, 2008
82. ### Chemistry

Why does MgO have a higher melting point than CaS? They are both ionic compounds with the same charges, but CaS is heavier so shouldn't it have a higher melting point?

asked by Shaniquaa on December 7, 2008
83. ### physics

Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 14.0 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 54.0 cm. What is the

asked by Anonymous on December 2, 2008
84. ### physics!

In a scene in an action movie, a stuntman jumps from the top of one building to the top of another building 4.0m away. After a running start, he leaps at an angle of 15 degrees with respect to the flat foor while traveling at a speed of 5.0 m/s. will he

asked by emily on December 9, 2008
85. ### chemistry

why are BeF2, AlCl3 and BeCl2 covalent compounds and not ionic compounds?

asked by sandra on December 19, 2008
86. ### physics

One of the curators at the art museum is tilting a large cylinder backward. At what angle (theta) will the cylinder of height h and radius r will tumble? My thinking is that the length = height = h 2r = w It seems that this cylinder will tumble when the

asked by Evelyn on December 10, 2008
87. ### physics

A horizontal disc rotating freely about a vertical axis makes 90 revolutions per minute reduces to 60,then find the moment of inertia of the disc? 1. mr2 2. 3/2mr2 3. 2mr2 4. 3mr2 (the last ‘2’in each option should be considered as square, please)

asked by hriday on December 27, 2008
88. ### Algebra help

If loga 8=2.079, loga 5=1.609, and loga 3=1.099, find the following? 19.) loga 8/3 is this 1.89? 20.) loga 24 Not sure 21.) loga 25 not sure how to do this

asked by Shawn on December 1, 2008
89. ### algebra 1

what do you call a duck that steals?

asked by Anonymous on December 11, 2008
90. ### Physics

In a physics lab, a small cude slides down a frictionless incline, and elastically strikes a cube at the bottom of the inclince that is only one-half its mass. If the incline is 30 cm high and the table is 90 cm off the floor, where does each cube land? I

asked by Steve on December 7, 2008

The distance from the pole in the center of the tetherball circle to the painted circle was about six feet. What was the approximate radius of the tetherball circle? Thank you. A. 12 ft B. 4 yd C. 3 ft D. 2 yd

asked by Mary on December 14, 2008
92. ### geometry

A painter leans a 15 ft ladder against a house. The base of the ladder is 5 ft from the house. a) To the nearest tenth of a foot, how high on the house does the ladder reach? b) The ladder in part (a) reaches too high on the house. By how much should the

asked by sarah on December 9, 2008

i need help making an acronym for A-S-T-C i need it to be funny... i cant think of anything! help!

asked by Hanahila on December 3, 2008
94. ### Thermodynamics

5 mol of an ideal gas is kept at 394◦C in an expansion from 1 L to 5 L .How much work is done by the gas? Answer in units of J.Given: R = 8.31 J/K/mol ,

asked by Sandhya on December 4, 2008
95. ### chemistry

a vessel has 6 g oxygen at a pressure P & temp 400 K . a small hole is made in it so that oxygen leaks out . how much oxygen leaks out if the pressure is P/2 & temperature 300 K ? 1. 5g 2. 4g 3. 2g 4. 3g

asked by hriday on December 24, 2008
96. ### chem

describe what happens when a nucleus is stabilized by converting protons into neutrons

asked by melissa on December 10, 2008
97. ### Science

As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? A) Sugar

asked by Lily on December 25, 2008
98. ### Biology

-Rank the following terms from simplest to most complex: cells, organelles, organs, tissue, organism. -If a cell is like a school, then the nucleus would be...? -Which organelle serves as a "workbench" for the ribosomes?

asked by Astrid on December 4, 2008
99. ### social help needed

1 how did the earliest people adapted their environment? 2 how the development of agriulture changed the way people lived? 3 describe the contributions early people made yo later civilizations?

asked by Anonymous on December 4, 2008
100. ### Physics

A 0.145-kg ball, moving in the positive direction at 13 m/s, is acted on by the impulse. What is the ball's speed at 4.0 seconds?