# Questions Asked onDecember 7, 2010

1. ## Chemisty.....Help =))

What is the molarity of ZnCl2 that forms when 30.0g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL . (please explain step by step I have no clue!) Zn(s) + CuCl2(aq) --> ZnCl2(aq)+ Cu(s)

2. ## Calculus

If the volume of a cube is increasing at 24 in^3/min and the surface area of the cube is increasing at 12 in^2/min, what is the length of each edge of the cube? I know that dV/dt=24 and ds/ds=12. I also know that Volume=s^3 and Surface Area=6*s^2, but what

3. ## Physics

When four people with a combined mass of 320 kg sit down in a car, they find that the car drops 0.80 cm lower on its springs. Then they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (when it is

4. ## Chemistry

Palladium-107 undergoes â decay (t1/2 = 6.5 x 105 yr) to form silver-107. How long will it take for 0.150 mol of silver-107 to form from 1.25 mol of palladium-107? help please...thank you :)

5. ## Calculus

A particle is moving around the unit circle (the circle of radius 1 centered at the origin). At the point (.6 , .8), the particle has horizontal velocity dx/dt=3. What is its vertical velocity dy/dt at that point? I don't know what equation to use or

6. ## Chemistry

WHAT IS THE BOILING POINT OF THIS SOLUTION? 1.00x10^2g C10,H8,O6,S2 (1,5-naphthalenedisulfonic acid) in 1.00x10^2g H2O (nonionizing solute)

7. ## Calculus

What is the linearization of f(x)=e^x at x=1?

8. ## physics

A diver runs horizontally off the end of a diving board with an initial speed of 1.75 sec. If the diving board is 3.0 m above the water line, what is the diver’s speed just before she enters the water?

Can you please tell me if these are right? Determine the pH for the following solutions A [OH-] = 1.0 X 10^-7 M I got 7 B. [H3O+ = 4.2 X 10 ^-3M I got 2.4 C. [H3O+]= 0.0001M I got 4 D. [OH-] = 8.5 X10^-9M I got 5.9 What are the [H3O+] and [OH-] for a

10. ## math

mike has two mats in the shape of triangles. the scale factor of the two mats is 7/9. what is the ratio of the perimeters?

11. ## College Physics

A vacuum cleaner has a measured sound level of 75.7 dB. What is the intensity of this sound? Answer in units of W/m^2

12. ## Physics

The A string of a violin is 31 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 5.8×10^−4 kg/m. What are the wave speed in the string? What are the tension in the string? What is the length of the tube of

13. ## statistics

the quality control inspector of a production plant will reflect a batch of syringes if two or more defectives syringes are found in a random sample of ten syringes taken from the batch of two percent defective syringes.what is the probability that the

14. ## calculus

use the graph of f(x) in the graph to find the sign (positive or negative) of dy/dx and d2y/d2x at the points A,B,C, and D

15. ## ipc

A sailboat is traveling at a steady speed of 13 mph. The force of the wind pushing against the sail is _______ the opposing force of the water resistance.

16. ## physics

the maximum height a typical person can jump from a crouched start is about 60cm. By how much does the gravitational potential energy increase for a 72kg person in such a jump? Where does this energy come from? I know the formula for gravitational

17. ## english

I need two examples where in the book Huckleberry finn. Huck doesn't believe in himself or he is having self doubt. does anyone know an example or two where this happens in the book? thanks

How many moles of H+(aq) ions are present in 1.25 L of 0.75M Nitric Acid? A. 0.60 mol B. 0.75 mol C. 0.94 mol D. 1.7 mol E. 1.9 mol Please show me how to work this!

19. ## Chemistry

What is the molecular weight of a gas if a 21.0g sample has a pressure of 836mm Hg at 25.0 degrees C in a 2.00L flash?

at 20 degrees celsius, how much sodium chloride could be dissolved in 2 L of water?

21. ## Physics

A 60 dB sound wave strikes an eardrum whose area is 4.1×10^−5 m^2. How much energy is absorbed by the eardrum per second? At this rate, how long would it take your eardrum to receive a total energy of 4.6 J?

22. ## Chemistry

What is the mole of oxalic acid? Equation:H2C2O4 + 2NaOH---> Na2C2O4 + 2H2O *Moles of oxalic acid dihydrate is 0.032 mole. * Molarity of oxalic acid solution is 0.128 M oxalic acid solution. * Initial volume of Oxalic acid is 19.8 ml and Final volume is

23. ## MATH

The path of a large stone fired from a catapult can be modeled by y= -0.00545x^2+1.145x where x is the distance the stone traveled (in yards) and y is the height of the stone (in yards). 1. find the distance the stone traveled. 2. find the maximum height

24. ## Help Chemistry

Can you please tell me if these are right? Determine the pH for the following solutions A [OH-] = 1.0 X 10^-7 M I got 7 B. [H3O+ = 4.2 X 10 ^-3M I got 2.4 C. [H3O+]= 0.0001M I got 4 D. [OH-] = 8.5 X10^-9M I got 5.9 What are the [H3O+] and [OH-] for a

25. ## MATH

If the corresponding angles of 2 polygons are congruent and the lengths of the corresponding sides of the polygons are proportional, the polygons are... a. Regular b. Congruent. c. Symmetric d. Similar

26. ## physics

A horizontal pipe contains water at a pressure of 108 kPa flowing with a speed of 1.5 m/s. The pipe narrows to one-half its original diameter. What are the speed and the pressure of the water when the pipe narrows?

27. ## Chemistry

A 50.0-mL sample of 0.10 M HNO2 is titrated with 0.10 M NaOH. What is the pH after 25.0 mL of NaOH have been added?

28. ## Physics

A 30 N fishing pole is 2.00 m long and has its center of gravity .350 m from the heavy end. A fisherman holds the end of the pole in his left hand as he lifts a 100 N fish. If his right hand is .800 m from the heavy end, how much force does he have to

29. ## chemistry

At 7.0 degrees C, the volume of a gas is 49ml. At the same pressure, its volume is 74 mL at what temperature?

30. ## chemistry

Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011 % Pb by mass. How much of the water (in mL ) contains 165mg of Pb? (Assume a density of 1.0 g/ml.)

31. ## MATH

Which of the following normal distributions has the smallest spread? A. A normal distribution with mean 1 and standard deviation 3 B. A normal distribution with mean 0 and standard deviation 2 C. A normal distribution with mean 3 and standard deviation 2

32. ## Chemistry

A pure sample of tritium, 3H, was prepared and sealed in a container for a number of years. Tritium undergoes â decay with a half-life of 12.32 years. How long has the container been sealed if analysis of the contents shows there are 5.25 mol of 3H and

33. ## physics

What is the minimum downward force on the box ( m=30 kg)that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.40 and 0.30, respectively.One person is pulling the box forward with a force of 125

34. ## physics

a child twirls a yo-yo about in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yo-yo? thanks!

35. ## arithmetic

2. Find the general term and 25th term of the sequences c) 15, 13, 11, 9 ...

36. ## Calculate Osmotic Pressure

69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm3 of solution at 20 degrees C. What is the osmotic pressure of the soluton?

37. ## Math

A string is cut in half,and one of the halves is used to bundle newspapers. Then one fifth of the remaining string is cut off. The piece left is 8 feet long. How long was the string originally? Please work this out. The anwser is 20 ft. THANKS

38. ## physics

A water tank springs a leak. Find the speed of water emerging from the hole if the leak is 2.5 m below the surface of the water, which is open to the atmosphere.

94. ## Geometry

The area of a triangle is 6.75 m squared. If the base of the triangle is 3 m, what is the height of the triangle?

95. ## Chemistry

Experiment on Titration of Acids and Bases Suppose some deionized water was left in the buret before it was filled with the oxalic acid solution you were using as a primary standard. When you perform the standardization of sodium hydroxide in Part 3, how

96. ## Geometry

In an equilateral triangle, what is the difference between the sum of the exterior angles and the sum of the interior angles?

97. ## physics

A car traveling 72.0 km/h along a straight, level road is brought uniformly to a stop in a distance of 40.0 m. If the car weighs 8.8 x 103 N, what is the braking force?

98. ## Math

Use lagrange multipliers to find the point on the plane x-2y 3z-14=0 that is closet to the origin?(try and minimize the square of the distance of a point (x,y,z) to the origin subject to the constraint that is on the plane) Help me please!

99. ## algerba..plz help

A 400 g solution is 25% salt. How much salt must be added to produce a solution that is 40% salt?

100. ## algebra

what three digit number is less than 300 and the ones digit is 4 times the hundreds digit and the tens digit is 5 more than the hundreds digit and the sum of the digits is 17

101. ## statistics

The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz. cups. When 15 cups were selected at random, they were found to have mean of

Ellie has 22 coins that equal $3.85. What are the coins? asked by Trent 103. ## advance language arts base: abase:: prolific:soporific mobile:immobile parley:parliament fortification:fortify CAN ANYONE HELP?? asked by irene 104. ## science How to write 5,800 million metric tons in standard form and in scientific notation? asked by Robert 105. ## chemistry 2 Na202 + 2H20 -> 4NaOH + 02 When 200.g of Na202 were reacted, 32.0 g of 02 were collected. The yield of 02 collected was (how many percentages) asked by andy 106. ## Math Which of the following has 2 parallel bases that are not polygons? a. Cone b. Prism c. Pyramid d. Cylinder asked by SquarePants 107. ## physics a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the asked by jacquie 108. ## 6th grade explain how you would decide whether the product of three numbers is positive or negative asked by Anonymous 109. ## algebra 1 Hi Ms. Sue again, I hate to be a pest but how did you get the two in 2/10, I am really brain dead today. asked by robbie 110. ## math draw a 16-mile trail map with five locations where a hiker could start at any location, walk all 16 miles, and return to the same location without walking over any trail twice. I am confused here. At first I thought I would draw the map with the stops asked by m 111. ## Calculus A ladder 10 ft long rests against a vertical wall. If the bottom on the ladder slides away from the wall at 2 ft/s, how fast is the angle ladder makes with the ground changing when the bottom of the ladder is 5 ft from the wall? asked by Tina P 112. ## PHYSICS A stationary horn emits a 135-Hz tone. What frequency is heard by a passenger on a train which is moving towards this horn with a speed of 31.3 m/s? asked by aok 113. ## english The essayist's role is to a. study a subject from various points of view. b. put together a believable plot. c. present an accurate account of an event. d. ridicule those who disagree with his or her opinions. A? asked by Lily 114. ## Physics At t = 0, a 785 g mass at rest on the end of a horizontal spring (k = 125 N/m) is struck by a hammer, which gives the mass an initial speed of 2.70 m/s. (a) Determine the period of the motion. T= .4979201367s Determine the frequency of the motion. f= asked by Anon 115. ## spanish I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 2 (el tiempo libre) ¿Cuáles asked by lauren 116. ## Chemistry As one descends group 6A of the periodic table, the number of valence electrons found in each element? A. Increases B. Decreases C. Remains the same asked by Ivy 117. ## Chemistry...Help!! To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ? asked by Lisa, Help needed! 118. ## Physics When a mass-spring system oscillates with a small amplitude of A1, it has a period of 1.0 s. If the system is then made to oscillate with a larger amplitude of A2 = 2*A1, what is the new period? Thanks! asked by Linda 119. ## College Chemistry Really Need Help THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol) asked by KEVIN 120. ## physics a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the asked by jacquie 121. ## Chemistry A 23.6 molar solution of formic acid (methanoic acid) has a density of 1.16 g/ml. The molar mass of H, C, and O are 1g/mol, 12g/mol and 16 g/mol, respectively. What is the molality of this solution? asked by Eddie 122. ## physics 5. A truck is travelling at a constant velocity of 16.7 m/s. A pumpkin is shot vertically (at a 90o angle to the ground)at a velocity of 120. m/s from the bed of a this pickup truck. The bed of the pickup truck is one meter high (from the ground). Complete asked by Alex 123. ## algebra Find a pair of complementary angles such that the difference of their measures is 12 degrees. asked by Northeast Middle School 124. ## MATH urgent!!! My problem: From 1992 to 1996, the annual income for all the private golf courses in the United States can be approximated by the model: I=59t^2+2254, where I is the annual income in millions of dollars and t is the year, with t=0 corresponding to 1990. 1. asked by Shannon 125. ## statistics An Urn contains 7 red and 3 white balls. Two balls are drawn in succession without replacement. If the second ball is white, what is the probability that the first ball was white? asked by Emily 126. ## math if possible, change each comparison of concentrate to water into a ratio. If not, explain why. a. the mix is 60% concentrate. b. the fraction of the mix that is water is 3/5 c. the difference between the amount of concentrate and water is 4 cups asked by Jack 127. ## Mathematics Show that 2i and 1-i are both solutions to the equation x^2-(1+i)x+(2+2i)=0 but their conjugates,-2i and 1+i are not. Then explain why this does not violate the Conjugate Zeros Theorem. asked by Sarah 128. ## Chemistry An unlabeled bottle containing a solution was found in the lab. It contains one of the following: AgNo3, CaCl2, or Al2(SO4)3. Describe how you would test the solution to determine which solution it is. Include equations in your answer. asked by Abigal 129. ## pre algebra 6th grade Tara's bank account contains$250.00. She made only one deposit exactly one year ago. The bank account pays a simple interest rate of 8%. How much money did Tara deposit in the account one year ago?

a yo-yo has a mass of 0.20kg and i attached to a string 0.8m long. what isthe velocity of the yo-yo?

131. ## Pre-Calc

I am seeking help with this problem Please...Thank you! Find the point on the line y=x+3 in the xy-plane that is closest to the point (3, 2)

132. ## Chemistry

Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1

133. ## Physics

Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec. Compare

134. ## Chem

did I do this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the volume of the reaction

135. ## physics

The displacement from the equilibrium caused by a wave on a string is given by: y(x, t) = (-0.00200 m) sin [40 m-1)x – (800 s-1)t]. What are the number of waves in 1 m

136. ## Math

In a survey of 204 people, the following incomplete information was recorded relating gender to color-blindness: Complete the table on a separate sheet of paper, then complete Parts (a) - (d). There are no required fill-ins within the table. Color-Blind

137. ## college Chemistry

A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of NaOH?

138. ## Micro Economic Theory

How do you find the budget constraint given the utility function u = q1^(1/3) + q2

139. ## English

Choose the correct word to complete each sentence. 1. Despite wanting to pass the exam, Julia just couldn't get down to revising. She seemed to have a mental ___ about it. a. brick b. gap c. block d. space 2. When the counsellor listened to George's

140. ## Chemistry

A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of H2SO4?

141. ## Russian

A study of the causes of the American Revolution of 1776, the French Revolution of 1789, and the Russian Revolution of 1917 best supports the generalization that revolution is most likely to occur when

190. ## Physics-Please check if I did this correctly

I posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the

191. ## Social Studies

Explain briefly the people and their culture. 1. Africa 2. Asian 3. South Pacific

192. ## physics

A model rocket is launched with an initial velocity of 10 m/sec at an angle of 45° to the ground. What is the total time of flight? What is the highest point in its trajectory? What is the horizontal range archieved?

i need help in Math with Fractions can i have some pointer to remember it. P.s. Thank you guys if u can help

194. ## Math 7th

Mrs.Flores bought 5 pounds of cheese. He used 2 1/4 pounds for cheese spread. 1 3/4 pounds for nachos and the rest for sandwhichs. Write a procedue that could be used to find the number of pounds of cheese he used for sandwhiches

195. ## Pre-Calc

Seeking step by step help with this question...Thank you much. Let f(x) =|9x|. For the area above the x-axis and between the lines x= -9 and x=18

196. ## Math 7th

Mrs. Jones bought 3 1/2 pounds of ajita meat at $2.50 per pound, 1 3/4 pounds of pinto beans and a package of tortillas for$2.23. She gave the cashier 20.00. What other information is needed to find the correct change Mrs.Jones will receive?

197. ## physics

This refers to passive solar collector, where solar radiation is used to heat water. It is therefore not on the solar cells. What characteristics should solar collectors have, to function in an optimal way? Why should these properties be fulfilled? If

198. ## English

Sunlight hits the solar cells on the backpack. The solar cells change sunlight into electricity. The electricity is stored in the battery. A cell phone or an MP3 player can be plugged into it. (In this passage, what does 'it' refer to in the last

199. ## english

What are the adjectives in this sentence? A giant sequoyia is ancient.

200. ## History/ English

I have to write a thesis statement and a prompt for my research paper and my topic is the Tet Offensive, how do i write a good one? I don't even know where to begin!

201. ## Chemistry

As one descends group 6A of the periodic table, the number of valence electrons found in each element? A. Increases B. Decreases C. Remains the same

202. ## accounting

Does the flexible budget term mean A series of budgets for varying rates of activity?

203. ## algebra 1

I need someone to help me fiqure this equation out and then explain how you got the answer. x + 7/10 = -1/5

204. ## english

Assuming that you are a mirror' explain it is a man's best friend in his youth and worst enemy in one's old age

205. ## chemistry

Explain jhow you would make 400 milliliters of an 18% solution from dry glucose and distilled water.

206. ## math

the regular season for professinal baseball is 162 games.a player was bat in each game ,and he played in 2/3 timesof the game. a. how many times was the player at bat during the season? b.the player hit 0.250,which means he got a hit 25% of the time,or oce

207. ## Physics

While traveling to school at 27 m/s your car runs out of gas 15 hm from the nearest gas station. If the station is 16m above your current elevation, how fast will the car be going when it reaches the gas station? Ignore friction.

208. ## physics

A car that is initially at rest at the top of a roller-coaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10-m-high circular hill at the bottom?

209. ## HEAT

A container holds a quantity of liquid nitrogen at a temperature of -200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a

210. ## Chemistry

Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the

211. ## Math

The problem tells us to approximate the integral using the midpoint rule. n=5, sin(x)2 dx 0 to 1. I understand that the answer is .2(sin(.1)^2 + sin(.3)^...). When I use my calculator to get the decimal answer, I cannot get the same answer the book has. I

212. ## Social Studies Urgent

Does the size of the planet affect the time it takes for one revolution around the Sun? The answer is No, but why is it because of the gracity pull from the Sun? Thank you

214. ## Physics

posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the

215. ## English

Hello. I wonder if English has certain rules concerning word division (I mean when there isn't enough space for a word on the line (or-ga-nize). I will appreciate it if you give a reference (if any)to this material. Thank you for all your detailed answers.

216. ## Psychology

The question is true or false. Language that elicits defensiveness usually involves giving both individuals equal power. I know that when you remove defensiveness then there is equal power, but I don't know what 'elicits' means in this sentence.

217. ## Physics

A spherical concave mirror has a radius R=360 mm forms an image of a h(object)=12 cm high object located d0=p=0.9 m from the vertex of the mirror. Find the position di=q(cm) and the height cm of the image.

218. ## math

The net is 3 feet high. The distance from where the ball is hit to the net is 24 feet. Assume the ball travels in a straight line. At what height must a tennis ball be hit so that it will just pass over the net and land 21 feet away from the net on the

219. ## Chemistry

You know the solution forms a precipitate when? (A) when it changes color (B) when you can’t see through it (C) because it bubbles (D) you have stirred it for more than 5 minutes (E) the solution thickens

220. ## Math

In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.

221. ## ALGEBRA/ CONFIRMATION

I am told to graph and write in interval notation for 6 < x < 13. This is my answer (6,13) I would then graph with open ends to show that the endpoints are not included?? Please tell me if I am correct.

222. ## physics

A model rocket is launched with an initial velocity of 10 m/sec at an angle of 45° to the ground. What is the total time of flight? What is the highest point in its trajectory? What is the horizontal range achieved?

223. ## Earth's Heat Sources

most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really don't get this question.

224. ## calculas

if the length is decreasing at a rate of 2 in./min. while width is increasing at a rate of 2 in./min., what must be true about area of the rectangle

225. ## physics

A strong man from the circus is being driven in a car which is moving at a constant speed of 5km/h. He decides he will test his strength by trying to stop the car so he pushes on the seat as hard as he can in the direction opposite to the motion of the

226. ## Pre cal

Find the area of a triangle with sides of 12, 14 and 20

227. ## spanish

how do you say this sentence in spanish ..How much do you wiegh.

What is the thesis of how would Bryan evaluate the ambitions of Albert Beveridge?

229. ## social studies

In world war ll did hitler die in his bunker?

230. ## Social

Why is the Plain of Abraham such important event in Canada's history?

231. ## Chemistry Intro

If the solubility of alum is 1g @ 1 degree celcius and 1.7 g at 6 degree celcius how much alum (KAl(SO4)2.12H20) would you expect to dissolve at 5.5% C?

After each snowstorm in Big City, USA plows remove snow from 762 lane miles of road, which is equivalent to about 48,000,000 square feet. The snowfall total was 34.2 inches in Big City, USA last winter. Suppose every snowfall evenly blanketed all road

The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long? Also to find the circumference of a circle do you use the radius or diameter x 3.14?

234. ## English

· Read two of the five paragraphs on the second page of this appendix. Write a brief paragraph of about 150 words in which you do the following: · o Identify which paragraph was more effective and analyze why this is so. o Include a discussion of

235. ## Thermodynamics

A combined seperating and throttling calorimeter was used to determined the dryness fraction of steam flowing through a steam main at a pressure of 900kPa. The pressure and temperature after throttling were 100kPa and 110C respectively. The mass of water

236. ## Alg I

Three towns A, B, and C lie on a straight road in that order.The distance from B to C is 6 miles more than twice the distance from A to B.The distance from A to C is 2 miles more than four times the distance from A to B.What is the distance from A to B?

Please suggest a few topics to present in micro-soft power point

245. ## statistic

The ball team was accused of cheating their soda drinkers by not putting enough soda in their 12 oz. cups. 15 cups were selected at random and found to have a mean of 11.7 oz., sd of 0.5 oz., at a significance level of .01. Test the claim that the

246. ## physics

brandon launches a projectile at an angle of 75 degrees above the horizontal, which strikes the ground a certain distance down range. for what other angle of launch at the same speed would the projectile land just as far away?

247. ## math

a roof is 2.5 feet vertically and 12.3 feet horizontally. what is the grade of the roof?

248. ## energy conservation

A car that is initially at rest at the top of a roller-coaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10-m-high circular hill at the bottom?

249. ## Childcare Mangment

i have 2 questions 13. Following the nutritional label on a jar of peanut butter, you determine that 1 ounce of the peanut butter contains 115 calories and 9 grams of fat. What percent of the calories come from fat? A. 30 C. 70 B. 40 D. 80 i think is B 5.

250. ## physics

Suppose 560.0 J of heat is added to a 111-g piece of aluminum at 23.0° C. What is the final temperature of the aluminum?

251. ## Math

Determine whether each general term defines a geometric sequence. Explain. a) f(n)= 2/(3n+1) b) f(n)= 11/(13^n)

252. ## Math

If a wall is 6th tall and a ladder is leaning against it. The ladder is 8th tall, how far apart is is the base of the ladder away from the wall?

253. ## geometry

if mBA=44 find the measure of mBA

254. ## chemistry

A solution of acetic acid, CH3COOH, has a concentration of 0.201 M and a density of 1.00 g mL-1. What is the molality of this solution?

255. ## Social Studies

i need help on some questions first question: What does the democratic government provide to the country hope you can help me please and thank you

256. ## physics

If a particle goes from location Xi = 10i + 5j + 2k to location Xf = 15i – 7j + 10k in a time ∆t = 5 sec. what is the average velocity and average speed of the particle?

for a frequency table what is the best interval for the data 1,14,6, 8, 10, 12, 15, 22, ans 25

258. ## Chemistry

What is the theoretical justifaction for the order of reaction rates of a cycloalkane, cycloalkene, and benzene?

259. ## MATH

Which of the following is NOT true? a. -3 > -8 b. -8 < -4 c. -8 < -9 d. -7 > -8

2x-y=-5 -2x-5y=11

261. ## social studies

Did someone kill Hitler in world war ll?

262. ## english

I am i stupid?

263. ## physics

what happens to the force of frictionif the coefficient of friction was reduced by one thrid

264. ## INTRODUCTION TO COMPUTERS

The Internet may best be compared to a(n) A. large network of roads. B. series of colored lights. C. loud truck motor. D. enormous skyscraper.

265. ## chemistry

how many mL of 1M HC2H3O2 are required to neutralize a spill of 25mL of 6M NaOH?

266. ## Chemistry-Help!!!

How many grams of chloride ions are in 2.5L of a 1.0 M calcium chloride solution?

I posted this question this morning but I'm not sure of the response Damon provided. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction

268. ## Chemistry

The volume of a balloon is 120L at 25 degrees celcius. What is it at 75 degrees celcius?

269. ## English

a living thing which grows in earth: plant (What does "in earth" mean? Does it mean under the ground or on the ground?)

270. ## chemistry

If 840 mL of 0.0140 M aqueous Al3+ and 500 mL of 0.0680 M aqueous Br- are reacted, what mass (g) of Br- is produced? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s) Molar Mass (g) Br- 79.904 Al3+ 26.982 Br- 79.904 Molar Volume (L) 22.400 at STP

271. ## Pre-CALC

Can anyone help me with this problem step by step please... Find the area inside the ellipse in the xy-plane determined by the given equation x^2 y^2 ____ + ___ =1 10 25

272. ## Algebra

Solve by elimination method. 7r-3s=14 3r+7s=64 Could never figure out the elimination method. Would love some help with this one. Thanks

273. ## Earth's Heat Resources

How is the energy that reaches earth's surface returned to space? is is by radiation?

274. ## Spanish

you are preparing for a job interview for your dream profession. the job application asks you to write a paragraph eh espanol discussing the following things. please explain why you are interested in this profession, what activities will you do on a daily

275. ## com155

Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives. What is the most effective way to determine whether a word is an

276. ## economics

what is the history on credit cards?

277. ## physics

A block of wood is moved by a man with a force of 150 N from place A to place B with a uniform velocity of 1.2 m/s. The time taken by him in this process is 30 s.

If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction between clothes and wall is 0.5, how do you find minimum speed you would need to stick to

279. ## math

George ran 3/8 mile on Sunday and 2/8 mile on monday. How much farther did george run on sunday than on monday?

280. ## MATH

K we are learning about Linear Equations and Graphs. And I'm doing the Slope-point Form, but I'm kind of having troubles with it. Liek I don't really get how to change the slope point form to the slope intercept one. Here is an example: y-5 = -1/2(x+4) y-5

281. ## Social Studies

Name one person from the unite state and talk about their culture

282. ## math

Solve. 2-8x=22

5x/5=-3x/8+1

284. ## Math

Calculate the monthly payment by loan amortization table Loan $26,000 Down payment$5,000 11% 36 Months

285. ## world studies

when & why did the cultures of Egpyt & Nubiabegin to mix?? plz help

286. ## math

We have a circle that has 270 degrees listed outside the circle at the top left. Inside the circle at the bottom right side is a an angle inside the circle with a P. Find the measure of Angle P. Would this be that we take 360-270 to get the measure of

287. ## music

In a round with 4 people singing Jingle bell rock who would end last if person 1 and 2 start at the same time then person 3 is next then person 4 is last?

288. ## Chemistry

How do I calculate the thckness of tin if I am only given the density which is 7.28grams

289. ## science,

how are sesons caused

290. ## math

Determine the domain and range of the function. 4-X^2 if x2

291. ## math

lennifer can you help... -20 divided by (10)= p.s. i don't have a divided by sign.

292. ## Physics 40

A pendulum bob of mass M1 oscillates with a period of 1.0 s. If the length of the pendulum remains the same, but the pendulum bob is replaced with another one of mass M2 = 2*M1, what is the new period? I need help.

293. ## spanish

I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammar, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 3 (Chicago) ¿Cómo es Chicago?

294. ## chemistry

the element germanium has a diamond-type structure.describe the structure of germanium.draw diagram

295. ## Physics

I need help solving for q. Here is the formula. F=(k*q*2q)/r^2

296. ## university of phoenix

I need 700 words explaining what your point of view will be and what plan to accomplish in your paper

297. ## algebra

P(1, 3) and R(5, 5) are the endpoints of a diagonal of the rectangle PQRS. Which sides of the rectangle are parallel to the x-axis? To the y-axis? What is the perimeter of the rectangle?

298. ## MATH

Max’s credit card charges him 1.575% interest per month on his average daily balance in that month. Max’s average daily balance for January is \$810. What is the interest that he will pay for January

299. ## Chemistry

Which is not a ground state electron configuration? A. 1s2 B. 1s2 2p1 C. 1s2 2s2 D. 1s2 2s2 2p1

What are some of the similarities between the Israelites and Mesopotomians?

301. ## math

the seasonal operating cost in dollars per square meter of grain bed for such a dryer consists of the cost of heating the air. heating cost=0,002Q(delta T) and blower operating cost Blower cost=2.6^(10^-9)Q^3 where Q= air quantity deliverd through the bed

302. ## algebra 1

Hi Ms. Sue can you tell me how you got 2/10 in the equation that I submited a few min. ago the equation was, x + 7/10 = - 1/5

303. ## Algebra

Whenever I see an expression like this, f(x)=-5x+6, how do I know if it is a function? Thank you.

304. ## math

franklin school has 3 boys for every 4 4 girls in fifth grade . there were 140 students in the fifth grade. A.how many are boys B.how many are gorls

305. ## Pre Alg.

How do you figuer H/9.6=5/12?

306. ## english

the mother seal looks fat and scary. in this sentence is the verb used as a linking verb or an action verb

307. ## Math question

I don't understand how to find the aproximate area of a shaded region This problem has a big cirlce with 1/4 shadded with a radius of 20 cm. the answer chocies are A. 90 cm squared B. 270 cm squared C. 314 cm squared D. 1.256 cm squared how do I find the

308. ## ENGLISH

Peace Like a River by Leif Enger HELP PLEASE!? In Peace Like a River by Leif Enger how are Jape Waltzer and Davy Land similar and different?

309. ## physics

Two masses m1 and m2 are suspended from the ceiling by two string segments. What is the tension in each string segment? Let m1 = 10 kg and m2 = 20 kg.

310. ## Industrial Hygiene

How much vinyl chloride is needed to fill a tank of 250 liter with a 13.5 solution?

need help to unscramble compound words

312. ## math

HOW CAN YOU REMOVE ONE OF THE NUMBERS FROM 68 AND HAVE 18 LEFT?

313. ## English

Hello. I need some grammar and lexical help. 1)Is it possible to use the infinitive with "purpose/goal/objective/aim": "the initiative has a purpose/goal to improve the situation" 2)is it possible to say "the visit intends to demonstrate..." (or is

314. ## physics

A 3 kg ball is thrown horizontally off a 78.5 m cliff with a speed of 12 m/s. How long does the ball stay in the air?

How many moles are in 8.8*10 to the 34

316. ## math

If the numerical values of the perimeter and the area of a square are equal, what are the dimentions of the square?

317. ## Social Studies

Name one person and talk about their culture from Europe

318. ## English

Hello. Will you please help me with the following: 1)Which article is to be used in "This event caused a/the exodus of British citizens." 2)Is "get acquainted with" possible with inanimate nouns (facts, situation, idea, concept)? 3)Is it possible to say

319. ## math

Not sure how to answer this m(

320. ## government

what is something i would find on commissioners court AGenda and not in city council court agenda?

321. ## chemistry

Explain what is required to create a buffer that needs to protect the pH between 8.1 and 8.5

what is a good web site to find a fill in the blank persuasive essay format! please reply ASAP this is due thursday......i only have 2 more days!!!!!!!!

323. ## science

whatis the deiffecnce between revoule and rotaian

324. ## Computers

I tried to use Google Video Uploader. However, I was not able to log in. I entered my e-mail address and then I entered the pass word, but it didn't work. Many times I tried to log on, but failed. How can I use the Google video Uploader? Would you let me

325. ## Math

If the length of a rectangle is x - 5 and the area is 4x(exponent2) - 12x +9, what is the width?

326. ## English

Sunlight hits the solar cells on the backpack. (Can we use reaches instead of 'hits' in this sentence?)

327. ## math

Sum of a 3 digit # is 24. Ones digit is 2 more than 2xs the hundred dig. Tens dig is 1 more thn 3xs the hund dig. Wats the #??

328. ## Math

A family is moving and has a number of electronic devices in the same packing crate. One of the devices beeps every 8 minutes, another device beeps every 10 minutes, and a third device beeps every 12 minutes. If all the devices beeped together at 3:00pm,

329. ## Algebra

find the product of (x^2 - 3x + 5) with the quotient of (10x^6 - 15x^5 - 5x^3)

330. ## poetry

can you teach me poetry

331. ## Chemistry

If all of the energy from a 60-watt bulb was put into 1 gram of water at room temperature for 2 seconds, how much would the temperature of the water increase?

332. ## Almeida

The two largest diner chains in Kansas compete for weekday breakfast consumers. The two chains, Golden Inn and Village Diner, each offer weekday breakfast customer a â��breakfast clubâ�� membership that entitles customers to a breakfast buffet

333. ## Math hw help

Four candidates, Allen (A), Bryant (B), Chula (C) and Ditka (D), are running for president of a club. The club uses a "First/Second/Third" ranking system. After the polls close, votes are tallied and the following results are obtained ranking 3565 1655 478

334. ## Calculus

Find the slope of the tangent line to the curve at (2,1) x/y + x^2y^2 = 6

how much would a trapizoid worth if the triangle eqauls 1/3

336. ## Pre-Calc

Can someone please be kind and show me the steps on this? Thanks Find the equation of the circle centered at the origin in the uv-plane that has twice the circumference of the circle whose equation equals (u-5)^2 + y^2 =9

337. ## Commercial Law

What is the difference between an offer and an invitation to treat and why is the difference important

338. ## Algebra

The points L(4, 0),M(10, 0), and N(7, 5) form LMN.What is the sum of the slopes of the three sides of the triangle?

339. ## CHOIR

MY TEACHER WANTS US TO PRACTICE TO SINING BUT I LEFT MY MUICS ON THE BUS WHAT SHOULD I DO

340. ## science

why are green plants important to humans?

341. ## Math

In a subdivison, 67% of homes have detached garages, 32% have a patio, and 13% have both. What is the probability that a house has a pation if you know that it has a detached garage? Please explain how you did the work, thanks.

MY TEACHER SAID WE HAVE TO READ SHIOLH AND HAVE ONLY 1 WEEK WHAT TO DO ABOUT 16 CHARTER WHAT TO DO

343. ## math

what whole number does N stand for if the number sentence bleow is true? [N+5]+[3 times 2]=18

344. ## math

a circular pool has a radius of 8 ft. what is the longest distance a swimmer can swim without making a turn?

345. ## science

convert 270g to moles

346. ## math help!

bernardo folds the 2 top corners of a rectanglular piece of paper to form 2 conguent triangles and an isosceles trapezoid. The triangles each have an angle that measures 65. what are the measures of the 2 top angles in the trapezoid? a. 25 and 25 because

347. ## math

How do you multiply -3/5 by -3 and write it as an improper fraction?

348. ## algebra

Find the value of this expression. 2/7 times 42/45 plus 2/5 times 11/3

349. ## social studies

Give an explanation on how the Unite State was founded

350. ## Re:Social Studies Urgent

socialist government: who is eligible to vote i've been searching this forever well most of all the socialist question need help on. please help and thank you

351. ## Social Studies Urgent

what freedoms does the people have when the country is run under a socialist government please and thank you

352. ## English

1.Most clarinets (are, is) made of wood. 1.are

353. ## science

does the moon have light

-17-(-5)

355. ## college

Support sentences for the sentence high rise apartments are efficient housing

356. ## complex Analysis

\int_{-\infty}^\infty {1 \over (4+x^4)} ,dx

-17-(-5)=

358. ## Chemistry

How do I calculate the thckness of tin if I am only given the density which is 7.28grams

359. ## methodologies

hmo director wants to know ifmanaged care plan meets industry standared. what is on way to do this?

360. ## Logic Help

1. G > H 2. A > (G • E) 3. A / A • (H v B) 4. 5. 6. 7. 8.

361. ## algebra

50e-.367x=125

-20 / (-10)=

363. ## Chemistry-Confused!!

You have 10mL of a 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?

364. ## bio 102

assuming the standard values for the atmospheric partial pressure of N2, O2, AND CO2 at sea level, what is the approximate total partial pressure of the remainig atmospheric gases?

365. ## biotech

write an sop that detail how to create 125 mM potassium phosphate buffer ph 7.1 at 32 degree celcius

366. ## Earth's Heat Resources

list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.

367. ## Chemistry-Help!!

If I have 10mL of 1.0 M Ba(OH)2 solution and add it to 2.5L of water. What is the concentration of hydroxide ions in the diluted Ba(OH)2 solution?

368. ## chemistry

what steps do i take when trying to figure out how many atoms of copper are contained in 1.15 moles of Cu?

369. ## physics

A 3 kg ball is thrown horizontally off a 78.5 m cliff with a speed of 12 m/s. How long does the ball stay in the air?

370. ## spanish

how do you say "i need help now" in spanish

371. ## math

Billy goes to soccer at 12:49 he ends at 3:45 ..... how many minutes or hours is soccer practice

372. ## MATH

N X 15 N=20,25,30 HOW DO YOU EVALUATE THE EXPRESSION FOR EACH VALUE OF N

373. ## english

In Peace Like a River by Leif Enger how are Jape Waltzer and Davy Land similar and different?

374. ## Chemistry

why do isomers have different properties? please give examples.

4 reasons europeans came to the coloines

compkete the pattern 25____61____97

377. ## English

1.These reeds (come, comes) from cane plants. come

-17-(-5)

379. ## excluded values

excluded value of: 12m²n/24mn³

380. ## algebra

1. 100x^2-9 2. 8x^2+14x+6

381. ## disease

WHAT IS CANCER AND HOW DOES ITSTART

382. ## math

how do you explain how all triangles have lines of symmetry

383. ## math

-20 divided by(-10)

384. ## math

-20 / (-10) =

385. ## math

4/6 + 5/6 THEN MUITLP