# Questions Asked onMarch 29, 2011

1. ## Physics

When spiking a volleyball, a player changes the velocity of the ball from 4.5 m/s to -20 m/s along a certain direction. If the impulse delivered to the ball by the player is -9.7 kg * m/s, what is the mass of the volleyball?

2. ## Physics

A satellite with an orbital period of exactly 24.0 h is always positioned over the same spot on Earth. This is known as a geosynchronous orbit. Television, communication, and weather satellites use geosynchronous orbits. At what distance would a satellite

3. ## chemistry

Potential of a cell is 0.1776 volts Pb|Pb2+(??M)||Pb2+(1.0M)|Pb I know i have to use Nernst's equation .. i just have no clue how to attempt this :S

4. ## geometry

what is the area of a rhombus with a 60 degree angle and sides 5 cm long? (round to the nearest 10th)

If the theoretical probability of rolling a 3 is 1/6, what is the experimental probability of rolling a 3 if the cube is rolled 300 times? Need a formula to show answer.

16. ## chemistry

a 25.0 sample of nitrogen has a volume of 50.0L and a pressure of 630. mmHg. what is the temperature of the gas?

17. ## Physics 203

A puck of mass 0.60 kg approaches a second, identical puck that is stationary on frictionless ice. The initial speed of the moving puck is 5.0 m/s. After the collision, one puck leaves with a speed v1 at 30° to the original line of motion. The second puck

18. ## Geometry

Find the area of the polygon with vertices at (1,3) , (7,3) ,(7,7) and (4,7)?

19. ## Physics

A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 9.00×10−3 {\rm m/s^2} less than that at sea level.What is the observatory's altitude?

20. ## Physics

A 0.125-kg baseball is dropped from rest. If the magnitude of the baseball's momentum is 0.750 kg * m/s just before it lands on the ground, from what height was it dropped?

21. ## math (word problem)

Suppose a car tire has a diameter of 26 inches. How many rotations will thee tire make if the car travels 1 mile? Round to the nearest tenth. If you get answer please show work of how to get there. Thanks!

22. ## Spanish

Cada verano, las chicas _______ el sol. (There is a picture of two girls laying out at the beach tanning)

23. ## physics

A gymnast with mass m1 = 47 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 118 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the

24. ## Physics

A 5.00x10^2-g block of metal absorbs 5016 J of heat when its temperature canges from 20.0 C to 30.0 C. Calculate the specific heat of the metal ..?

25. ## Environmental Science

Debate the claim that famines are caused more by human actions (or inactions) than by environmental forces. What scientific evidence would you need to have to settle this question? What hypotheses could you test to help resolve the debate?

26. ## prob/stats

Nationwide, the amount charged by doctors for performing a particular minor surgical procedure averages $1220 and varies with a standard deviation of$270. We randomly select 140 bills from the population of all bills charged for this surgery. Let

27. ## Macroeconomics

. Atlantis is a small, isolated island in the South Atlantic. The inhabitants grow potatoes and catch fresh fish. The accompanying table shows the maximum annual output combinations of potatoes and fish that can be produced. Obviously, given their limited

28. ## chemistry

If a bottle of nail polish remover contains 179 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 {\rm{g}}/{{\rm{mL}}}

29. ## prob/stats

Nationwide, the amount charged by doctors for performing a particular minor surgical procedure averages $1220 and varies with a standard deviation of$270. We randomly select 140 bills from the population of all bills charged for this surgery. Let

30. ## Chemistry

If 25.5 grams of NaOH is dissolved in 750 ml of water, find: [H+]= [OH-]= pH= pOH=

31. ## maths

A ball is launched into the air from below a cliff. after t seconds its height above the cliff top is h metres, and is given by the equation h = − 4.9t 2 + 19.6t − 14.6. Calculate, to the nearest metre, the maximum height the ball achieves above the

32. ## Human Development

Blake amuses and challenges his teachers with his independent thinking. He’s self-reliant and responds appropriately to corrections and criticism. Blake’s parents probably use the _______ style of child rearing. A. permissive C. authoritative B.

33. ## physics

A merry-go-round of mass 1640kg has a radius of 7.5m. How much work is required to accelerate it from rest to a rotation rate of 1 rev. per 8 seconds? (assume a solid cylinder) /

34. ## Chemistry

If 3.00 mol of calcium carbonate is heated to produce calcium oxide and carbon dioxide, how many grams of carbon dioxide gas are produced?

35. ## geometry

the perimeters of 2 similar polygons are 20 and 28. One side of the smaller polygons is 4. What is the congruent side of the larger polygon?

36. ## physics

In a typical golf swing, the club is in contact with the ball for about 0.0010s. If the 45-g ball acquires a speed of 41 m/s, estimate the magnitude of the force exerted by the club on the ball.

37. ## math

Please check my answers Would you be more likely to get at least 70% tails if you flip a fair coin 10 times or if you flip a fair coin 1000 times? same Consider a bowl containing 36 different slips of paper. Ten of the slips of paper each contain one of

38. ## Literature. The Odyssy

What are 3 reasons Odysseus was an epic hero?

39. ## science

given 90 ml of Hydrogen gas collected with the temperature is 27 degrees C. What volume will the Hydrogen occupy at 42 C ?

64. ## physics

A car traveling at 98 kilometers an hour comes to a stop in 15 seconds. What is the car's acceleration in kilometers an hour per second

65. ## ALGERBRA

CAN YOU PLEASE TELL ME THE SOLUTION FOR THE FOLLOWING 5X>-4 BUT THE SIGN HAS A LINE UNDER IT I REALLY NEED HELP

66. ## math

There are fifty marbles in a sack: red, blue and green. There are ten more green than blue marbles in the sack. The probability of drawing a red or blue marble is one-half. Write and solve an equation to determine how many of each color marble is in the

67. ## Chemistry

How much water can be produced from the complete reaction of 2.56 L of oxygen gas, at STP, with hydrogen gas answer in units of g.

68. ## Chemistry

1. How much heat energy is needed to transform 125g of ice at 0 degrees Celsius to warm water at 80 degrees Celsius?

69. ## Chemistry

Urea, (NH2)2CO, is dissolved in 73.5 g of water. The solution freezes at -0.095°C. How many grams of urea were dissolved to make this solution? (Answer must be in grams)

70. ## Physics

Can an electron at rest in a magnetic field be set into motion by the magnetic field? What if it were at rest in an electric field?

71. ## english- macbeth

well i have a couple of questions about the tragedy of macbeth that i have no clue how to answer so if you could lend me some help i'll appriciate it. it's act 2: Q1) Though Macbeth encounters no actual opposition until long after Duncan is murdered,

72. ## algebra

What is the basic principle that can be used to simplify a polynomial? What is the relevance of the order of operations in simplifying a polynomial?

73. ## accounting

Neer Department Store uses the retail inventory method to estimate its monthly ending inventories. The following information is available for two of its departments at August 31, 2011. Sporting Goods Jewelry and Cosmetics Cost Retail Cost Retail Net sales

74. ## math

pauline has 35 cups of flour. She makes cakes that require 2 1/4 cups each. if she makes as many such cakes as she has flour for, how much flour will be left over?

99. ## Physics

A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8380 N/C. The mass of the water drop is 3.40 10-9 kg. How many excess electrons or protons reside on the drop?

You want to bring up concerns about security with your brother. Joseph asks you, "If the Internet is inherently not secure, then why are so many business, government, and military transactions being processed online?" Your brother feels that the security

101. ## Pre-Cal

Four couples have reserved seats in a row for a concert. How many ways can they be seated if the two members of each couple wish to sit together? How do I go about doing this problem? I'm not sure what/how I should multiply this out...

102. ## Chemistry.

The complete combusion of 0.5763 grams of glucose in a bomb calorimeter (Cbomb = 6.20 kJ/degrees C) raises the temperature of the calorimeter by 1.45 degrees C. what is the food value of glucose in calories per gram? (Hint: remember 1 Cal = 4.184 kJ) i do

103. ## Geometry

1. Graph the quadrilateral with vertices C(-9,4), D(-4,8), E(2,6), and F(-3,2). What specific shape is it? 2. Include the work with explanations of how you solved this. 3. List at least 2 other ways you could have proved this. You do not have to prove

104. ## math

A banner in the shape of an isosceles triangle has a base that is 2 inches shorter than either of the equal sides. If the perimeter of the banner is 34 inches, then what is the length of the equal sides?

105. ## social studies

Describe the evolution of integration movement in the Caribbean

106. ## PHYSICS

5.00x 10^-2 mass with charge +0.75 micro coulombs is hung by a thin insulated thread. Charge of -0.9 micro coulombs is held .15meters directly to the right so that the thread makes an angle with the vertical. What is the angle and the tension in the

107. ## Math

After the first 41 games of the baseball season, the Red Sox have a winning percentage of 0.585 and the Yankees have 0.512. How many games behind the Red Sox are the Yankees?

108. ## maths

Calculate the discriminant of the quadratic expression 4x^2-x-3

109. ## science

A cylindrical bottle of oil-and-vinegar salad dressing whose volume is 1/3 vinegar (p=1.01 g/cm^3) and 2/3 oil (p=.910 g/cm^3) is at rest on a table. Initially the oil and the vinegar are separated, with the oil floating on top of the vinegar. The bottle

110. ## Calculus

Function f(x)= e^-x^2 a) Inflection Values b) Intervals on which f(x) is concave downward c) Intervals on which f(x) is concave upward.

111. ## physics

The load across a 12 V battery consists of a series combination of three resistors 21 ohm, 22 ohm, and 56 ohm. What is the total resistance of the load? Answer in units of .

142. ## Physics

.17 kg hockey puck initial velocity 21 m/s stops 62m away. what is coefficient of friction?

143. ## Math

What is the median of this set? {π, √25, 15%, √15, 10/4}

158. ## English

Are there any compounds besides and,but,or,nor

159. ## 5th Grade Math/Making a Duplicate

I need help with a worksheet that has a line going down with a y with positive numbers at the top and negative numbers at the bottom and the it has a line going across with an x with negative numbers on left and positive on right. It has a tic tac toe

160. ## Chem

Can you show me step by step how to do the following problems? How many grams of KI are in 25.0 mL of a 3.0 % (m/v) KI solution? How many milliliters of a 2.5 M MgCl2 solution contain 17.5 g MgCl2?

161. ## English

I need to interview a group of American 16-year-old-students who are visiting our school. I hope you can help me wiht the questionnaire. Thank you. 1) How often do you have English a week/during the week/every week/per week? 3) How much free time do you

162. ## General

Are their any search engines I can use besides bing and google? Any places I can access historical journals? Thanks!

163. ## Chemistry

How to prepare 1000 nM stock solution using Tam (1 gm) Mol Weight=563.6

164. ## Dante's inferno project Question

So I just received a project from my english teacher.. and Dantes Inferno is our topic. We have to choose one person. ( can be alive or dead) on the world to put in hell, for a sin or something and choose which level to put he/she on. I'm doing george

165. ## Physics

Specifically, which of the following best expresses your view: i. Many physics concepts make a lot of sense and connect to everyday experience; but formulas are more of a problem-solving tool than a sense-making tool. ii. It really depends on the formula.

166. ## chemistry

Calculate the Rate constant, k, at 20 degrees C and 30 degrees. run 1-3 slope avg is .03439 slope at 30 degrees is .10554

167. ## math

Two angles with measures (5x+7) and (15x-7) are supplementary. What is the value of X?

168. ## Physics

two point masses are located in the same plane. the distance from mass 1 to the center of mass is 3.0m. The distance from mass 2 to the center of mass is 1.0m. What is m1/m2, the ratio of mass 1 to mass 2?

169. ## algebra

Two sides of a triangle have equal length. The third side is seven inches shorter. How long are the three sides if the perimeter is 23 inches?

170. ## physics

A volume Vi = 23.1 L of air at temperature T = 21 ¢XC is compressed at constant temperature to a volume Vf = 7.7 L. The relative humidity of the air before compression is R = 56.4 %. Saturated water vapour in air at this temperature has a vapour pressure

Monuments in Paris... -Grand Palais -Saint Chapelle -Le Louvre -Mur de la Paix -Notre Dame Any others that are well known?

172. ## Physics

A submarine has run into trouble and is stuck at the bottom of the ocean. Several people are on board and must make their way to the surface without any diving gear. The air pressure aboard the submarine is 3.100 atm. The air temperature inside the

173. ## sociology

Identify a movie or book, identify with examples from the movie or book three main sociological concepts (not theories) that we have studied, identify which theory (conflict, functionalist, feminist, or interactionist) was evident in the movie or book, and

I am desperately trying to help my 5th grader figure out how many ways can we make this equation true 24 x 18 = 432 x

175. ## Calculus

Find the absolute maximum value and the absolute minimum value, if any, of the function. g(x) = -x(^2) + 2 x + 9

176. ## maths

Derive an expression for sin(alpha minus beta) and cos(alpha minus beta) with neccesary diagrams

177. ## statistics

1. Observe the number of customers visiting a particular ATM Centre during any day from March 21 to 26, 2011 between 10 a.m. – 12 noon with a time interval of 5 minutes (number of customers using the ATM every 5 minutes). Calculate the average number of

178. ## stats 3

2. Collect the data pertaining to the number of customers serviced (by you or by one of the branch employees) and the number of leads generated through them during any 10 consecutive working days in February 2010. The data has to be tabulated as under. The

179. ## stats 4

4. RBI is analyzing the total credit flow in the economy and the circulation of money in the economy. In order to formulate its annual Monetary & Credit policy, RBI is assessing the credit off take in the banking sector and has classified as low, moderate

180. ## geometry

I got this problem wrong on a test and i want to know how to fix it. In triangle ABC, angle A is 20 degrees and side AC is 7.89 units, find the other sides and angles

181. ## physics

A charge is uniformly distributed over a linear section from 0

182. ## Physics

An elevator is moving down with an acceleration of 2.46 m/s^2. What would be the apparent weight of a 66 kg man in the elevator?

The area shaded is the matting and it is 64 square inches. What side length of a picture frame do you need to cover the entire picture? There is a 6inch square opening in the matting.

184. ## statistics

Assume that you own a small factory. A critical piece of machinery in your factory will need to be replacedin 180 days. If the machinery does not show up on time, you will need to shut down until it arrives. This might cause you to permanately lose

185. ## Math

The following data show the number of Chinese citizens who immigrated to the U.S. Use the data to predict how many Chinese immigrated to the U.S. during the 1990. Decade No. of Chinese Immigrants 1950s 10,000 1960s 35,000 1970s 124,000 1980s 389,000

186. ## US History. Please, help.

How were President Truman and President Eisenhower similar? How were President Truman and President Eisenhower different?

187. ## Math

I have to do a 4x4 magic square with the digits 2011 so that each row column and diagonal contains one 2 one 0 and two 1s. But the hard part is that the sum of each row column and diagonal has to be 4. Please help if you can i've been at it for hours and

188. ## science

what would happen if a large amt of light colored dust was added to the atmosphere? dark black soot from fire?

189. ## chemistry

formulas para determinar las cantidades y proporciones o porsentage de los componentes de una mescla.

190. ## Algebra

Square root of 14abc times the square root of 2ab

191. ## physics

(Conservation of Linear Momentum)How do you find the kinetic energy lost during a collision when you already have both the masses and both the initial and final velocities?

192. ## math

You meet a woman who tells you. "I have two children. One of them is a boy." What is the probability that both children are boys?

193. ## chemistry

1.44 liters of gas at 0.935 atm are compressed to 0.275 l. Find the new pressure in atm.

194. ## physics

find the mean free path of the molecule of oxygen at normal pressure, if the coefficient of diffusion of oxygen at the same pressure and temperature of 0 ° C is equal to 0,19 cm ² / sec. найти среднюю длину свободного

195. ## Economics

You are a utilitarian social planner and have a very limited number of vaccines to a new and potentially deadly virus. How do you allocate them? Do you: (A) give them to specific groups, such as high-risk populations, or (B) sell them to the highest bidder

196. ## Physics- 2D Collisions

nitially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic?

197. ## calulas

Find and identify the location of the extreme points of f(x)=8xln4x

198. ## Physics

A tennis ball of mass 0.0609 kg is served. It strikes the ground with a velocity of 52.5 m/s (117 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 50.5 m/s at an angle of 17.7° above the horizontal. If the

199. ## Math/Corrdinate Plane

I need help with a worksheet that has a line going down with a y with positive numbers at the top and negative numbers at the bottom and the it has a line going across with an x with negative numbers on left and positive on right. It has a tic tac toe

200. ## Chemistry

A student titrates HCl with 0.0125M KOH. Starting with 50.00 ml of the acid it takes 40.0 ml of base to reach equilavence point. A. What is the concentration of the HCl? B. What is the initial pH of the acid solution? C. What is the pH of the reaction

201. ## calculus

where is f(x)=12cos(3x) equal to zero. so far i have pi/2+n2pi.. i am not sure about pi/2

202. ## social studies

explain briefly four factor led to enclousers in england

203. ## math

how many ways can this equation be made true 24 x 18 = 432 x

204. ## chemistry

formic acid is a monoprotic acid with a ka at ml solutionof m of formic acid solution is titrated with m naoh what is the ph at the equivalence point

205. ## Chemistry

How much water can be produced from the complete reaction of 2.56 L of oxygen gas, at STP, with hydrogen gas answer in units of g.

275. ## math

The following data show the number of Chinese citizens who immigrated to the U.S. Use the data to predict how many Chinese immigrated to the U.S. during the 1990s. Decade No. of Chinese Immigrants 1950s 10,000 1960s 35,000 1970s 124,000 1980s 389,00

276. ## reserch

what changes would you half to make to a human being phisical features if it were to live in an enviroment with a temprature over 50c every day.

277. ## government

Provide a current event example that you think illustrates the power of one branch of government to check another.

278. ## Pre Calc Trig

Verify the following: tan( a + p/2) = -cot a a= alpha and p= pie since I do not have that button.

279. ## geometry

what is the area of a rectangle that's 15 feet long and 20 feet wide

280. ## chemistry

what gas law did you use to answer my questions earlier?

281. ## Health

I have a female red eared slider that has swollen eyes. I found out that it has a disease. I do not know where to get the antibiotics to help treat this disease and care for my turtle. If you know of any places or things I can do to help my turtle, then

282. ## chemistry

The calcium phosphate in a phosphate rock weighing 7.4kg was found to be 477.92mg. What is the concentration of calcium and phosphorous in ppm in the rock sample.

283. ## ETH

Should United States government policy favor certain kinds of immigrants?

284. ## science....need answer in 8 minutes!!!!!!

Which of the materials is NOT recently mined from the ocean floor? 1.oil and gas 2.nodules 3.diamonds 4.phosphorites HELP!!!!

use backtracking to solve each e quations ?. 2x +1=9, 7k-3=32, 5(n-8)=25 2(2t-1)=14 8x-1=63 ,2x-5=15,

286. ## math similiar figures

The pyramid above has a base of 48 square inches and a height of 17 inches. Which set of dimensions would produce a similar figure?

287. ## Chemistry

An unknown material absorbs 1,930 J of heat when it changes from 25 °C to 35°C. The sample weighs 500g. What is the specific heat of this material?

288. ## marketing

discuss the legal and ethical implications that could affect the marketing process with nutrition life cycle of school age children

289. ## Pre Calculus 1

ln(3x-1) - ln(x+2) = 2ln5

290. ## biology 101

describe ecosystem of temperate rain forest population growth and regulation through community interactions

291. ## math

is each sum greater than or less than 4? 1.7 +0.6 +2.0 = 1.3 +0.86+1.6=

292. ## Government

If a person had to prove his or her innocence instead of the government how would our legal system differ?

293. ## public health

Most of the increase in medical cost is due just to normal inflation that has affected the entire economy.” Comment on the above statement.

294. ## math

what is the average total 0f 60 90 and 120

295. ## algebra 2

find the 5th term for the expression (u+2v) ^4

2+2=

297. ## Math

How do i graph and do this problem Y=x

298. ## science

i need to solve this : 1. we should show the chemical structure of oligosaccharide which contains 2 galactoses and 1 saccharose. 2. compare the difference in physical features og dicarboxylic acids and glucose beta chain 3. determine the calorific value of

299. ## News

Is the situation in Libya similar to what happened in Egypt? Why?

300. ## trig

solve csc^2x=3 for all possible solutions

301. ## Math

what is 1/5 in base 5?

I learn about canada government. I from India. There questions I don't understand. 1. Why do some politicians think that the senate should be reformed? Identify a possible solution to the issue of Senate reform.

303. ## Maths

solve by Gauss elimination x+y-z=2 -x+3y +z=3 4x-y+3z= 5 show work for each step please

304. ## math

round n359,641 to the nearst 1,000

305. ## Pre Calculus 1

lnx + ln(x+3) = 2

306. ## general knowledge

how can we write 17. march.2011 in 5 letters without using any numbers

307. ## math

which quadrilateral has only one pair of parellel lines? need answer in 1 min.

308. ## calculus

sketch the curve of function y = (x-1)/ (x^2-x-6)

309. ## math

2.1L over 13hours after 5 hours 1.5 liters remain. Is there an adjustment needed what should be the adjusted flow rate

310. ## algebra 2

Find the 5th term of the expression (r+s) ^10

311. ## english - Contrast Advertising

What are some companies that sell produtcs to the average consumer?

312. ## science

(1) what measurements and what calculation would you need to make in order to determine the density of a rectangular wooden block? (2) a student announced that she had made a sample of a new material that had a density of 0.85g/cm3. from the inforation

313. ## math

what is 132+45=?

314. ## equal to greater than and less than

bryce and jewel were playing with kick balls in gym class. Bryce kicked seven tenths of the kick balls into the net. Jewel kicked twenty three thirtieths of the balls into the net. Which athlete scored more goals?

315. ## chemistry

how to make 0.5%glacial acetic acid from glacial acetic acid

316. ## us history

how is the 1860 vote of Missouri related to its stand on the question of secession?

317. ## math

name all the properties to a equilateral triangle and a obtuse triangle

319. ## Pre Calc

ln (x^2 +x-12)=3ln2

320. ## Math

what is the circumference of a circle that has a diameter of 16 mi?

321. ## job fair questions

are performance appraisals necessary why how do they enhance future performance

3#3 - 8