# Questions Asked onFebruary 27, 2012

1. ## English

i read this story today and need help with few questions. sorry it a bit long. i actually not real understand it, especially ending. THE WHITE KNIGHT by Eric Nicol Once upon a time there was a knight who lived in a little castle on the edge of the forest

2. ## Chemistry

Find the pH of each mixture of acids. 0.115 M HBr and O.125 M HCHO2. I TRIED DOING THIS PROBLEM THE SAME WAY AS THE ONE BEFORE BUT IT DIDN'T WORK. THE PH SHOULD BE 0.939. I did HBr as stronger acid and got concentration of H+ and put it into the ka

3. ## Physics!!!

A 24-V battery is connected in series with a resistor and an inductor, with R = 5.6 Ω and L = 2.0 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value. (b) Find the energy stored in the inductor one time

4. ## Geometry

To the nearest degree, what angle does a hill with a grade of 11% make with a horizontal line?

5. ## chemistry

A galvanic cell consists of an electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C.

A trough is 5 meters long, 1 meters wide, and 4 meters deep. The vertical cross-section of the trough parallel to an end is shaped like an isoceles triangle (with height 4 meters, and base, on top, of length 1 meters). The trough is full of water (density

7. ## physics

a car is traveling 20.0 m/s when the driver sees a child standing in the road. he takes 0.80 seconds to react, then steps on the brakes and slows at -7.0 m/s squared. how far does the car go before it stops?

8. ## Chemistry

Determine whether each cation is acidic or pH neutral. For those cations that are acidic, write an equation that shows how the cation acts as an acid. A) Sr+2 B) Mn+3 C) C5H5NH+ D) Li+

9. ## Chemistry

Find the pH of each mixture of acids. 0.020 M HBr and 0.015 M HClO4. They are both strong acids Si they dissociate completely. Si do I just add 0.020 and 0.015 and take the -log of that concentration to get the pH? Like thus.... 0.020+0.015=0.035

10. ## physics

A cart starts from position 4 (which is 20m above ground) in the figure below with a velocity of 11 m/s to the left. Find the speed with which the cart reaches positions 1, 2, and 3. Neglect friction. speed at position 1 m/s? speed at position 2 m/s? speed

62. ## help help help chemistry

why will no one answer this question? For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction

77. ## physics

a body of mass 5kg is thrown vertically upwards with a speed of 10m/s. what is its kinetic energy when its thrown? find its potential energy when it reaches at the highest point. also find the maximum height attained by the body[g=10m/s]

78. ## science

The density of liquid oxygen at its boiling point is 1.14 \rm{kg/L} , and its heat of vaporization is 213 \rm{kJ/kg} . How much energy in joules would be absorbed by 4.0 L of liquid ox

Mixture Problem... An auto tech needs a radiator to have a 40% antifreeze solution. The radiator currently is filled with 4 gallons of a 25% antifreeze solution. How much of the antifreeze mixture should be drained from the car if the mechanic replaces it

80. ## geometry

If the m of angle AMD =x+2y and m og angle ABC=2x-y. Find the values of x and y

92. ## physics

A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. The weight of the ladder is 18.4 lb. A 60.8-lb boy climbs 4.18 m up the ladder. What is the magnitude of the frictional force exerted on the

93. ## PRE-CAL

How can I solve this questions and get those answers???? answers sec 13pi/4=? =>-ã(2) csc 13pi/4=? =>-ã(2) sec (-pi/6)=? =>2ã(3)/3

94. ## maths

The triangle has vertices A(0,1),B(1,6) and C(5,2).Prove that the triangle is isosceles.

95. ## Physics

A positive test charge is moving between two oppositely charged plates. As the charge moves toward the negative plate, its potential energy? does it decrease, increase, or remain the same?

96. ## MATH HELPPPP

in the diagram below,

97. ## Chemistry

Consider the following equilibrium reaction: NaHCO3(s) Na2CO3(s) + H2O(g) + CO2(g) When 100 g of sodium hydrogen carbonate are added to a reaction vessel, the temperature is increased to 200°C, and the system comes to equilibrium. What happens to the

104. ## maths

Given that the equation of the parabola is 5y^2 + 24x = 0. Find (1)The Axis and vertex of the parabola (ii)The focus and the directrix (iii)The distance from the directrix to the focus

105. ## Physics

In her physics lab, Stephanie rolls a 30 g marble down a ramp and off a table with a horizontal velocity of 2 m/s. The marble falls in a cup placed 0.4 m from the table’s edge. a. How long is the ball in the air? 0.2 s b. How high is the table? m

106. ## math

kim ate 3/2 slices of an apple. Did he eat less than a whole apple or more than the whole apple. draw picture to show your answer

107. ## statistics

Science scores for HS seniors in the US are normally distributed with a mean of 77 and a standard deviation of 7. Students scoring in the top 4% are eligible for a special prize. What is the approximate cutoff score a student must get in order to receive

108. ## physics

a) A set of crash tests consists of running a test car moving at a speed of 12.6 m/s (27.7 m/h) into a solid wall. Strapped securely in an advanced seat belt system, a 69.0 kg (151.8 lbs) dummy is found to move a distance of 0.600 m from the moment the car

109. ## science

Numbers 1-9 are true and false questions.Check if my answers are right and if I didn't write anything on the blank, I need help with them. Thanks!!!! _____ 1. Velocity could be reported as 50 k/hr. True 2. How far an object travels in a certain period of

110. ## math

How do I set this up and solve? You are planning a rectangular patio with length that is 7 ft less than 3 times its width. The area of the patio is 120 ft squared. What are the dimensions of the patio?

111. ## science

How much energy is required to raise the temperature of 22.8 g of copper from 30°C to 1250°C?

112. ## Scottsdale c c

A baseball has a velocity of 44.0 m/s, directed horizontally, as it is released by a pitcher. The ball’s velocity 0.0100 s before it is released is 42.0 m/s, directed 3.00 degrees above the horizontal. Estimate the ball’s instantaneous acceleration

113. ## trig

Name three values of theta that would result in y equal to cot times theta being undefined.

NAME 2 SMALLER ARRAYS YOU CAN USE TO FIND THE PRODUCT. 8X6=

115. ## chemistry

Indicate whether each solution is acidic, basic, or neutral. a. [H3O+] = 6.9 x 10-1 M This solution is acidic. b. [H3O+] = 8.2 x 10-13 M This solution is basic. c. [H3O+] = 3.2 x 10-1 M This solution is acidic.

116. ## physics

A mass of 1000kg is released from a height of 10m.with what energy will it strike the floor?(g=10m/s/s)

117. ## physics

Can someone please help me solve this: An 7.74g bullet is fired into a 320g block that is initially at rest at the edge of a frictionless table of height h = 1.07 m The bullet remains in the block, and after the impact the block lands d = 2.07 m from the

118. ## mental health

give two examples of negative feedback and two examples of positive feedback.

119. ## Chemistry

What compounds can be formed by the reaction of K2SO4 and BaCI2?

120. ## ACC291

The following stockholders' equity accounts arranged alphabetically are in the ledger of McGrath Corporation at December 31, 2011. Common Stock ($10 stated value)$1,500,000 Paid-in Capital from Treasury Stock 6,000 Paid-in Capital in Excess of Stated

121. ## Physics

A 279 N force is pulling an 75.9-kg refrigerator across a horizontal surface. The force acts at an angle of 26.3 ° above the surface. The coefficient of kinetic friction is 0.259, and the refrigerator moves a distance of 9.14 m. Find (a) the work done by

122. ## science

if Earth's axis were not tilted,could any area have both a hot summer and a cold winter?

123. ## Math

There is a table that shows the percent of adults who used computers from 1984 through 1993. And it says , what is the rate of change from 1989 to 1993? The table shows the years, 1984, 1989, and 1993. And then under it, it says the percent of adults.

124. ## Science

An animal cell has all of the following structures except ________

125. ## physics

A 220-g ball strikes a wall with a speed of 7.0 m/s and rebounds with only 37% of its kinetic energy. What is the speed of the ball immediately after rebounding? What is the magnitude of the impulse of the ball on the wall? If the ball was in contact with

126. ## help!!!!!!!!

in the days of king adobe, what is a character trait describing the two travelers.give two examples to support your description. I picked sneaky. I only know one supporting detail.I need help finding the other supporting detail.

127. ## Math

in the diagram below,

128. ## phsyics

A brick of mass 1.5 kg slides down an icy roof inclined at 30.0° with respect to the horizontal. (a) If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 1.75 m away? Ignore friction. m/s ? (b) Redo part (a) if the

129. ## math

Solution for 2/3x+x+90=180

130. ## Physics

How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for

131. ## calculus

Use Lagrange multipliers to find the max/min values of the function f(x,y)=xy subject to the constraint: x^2/8+y^2/2 =1 Pleasssse help me with this!!

132. ## english FIXED

original thread: cgi?id=1330376726 1. Water is the source of life. We all depend on it. Water is important, and we cannot survive a week without it. 2. Water should be free; it is a basic need for living. We should not consider buying bottled water. 3.

146. ## chemistry

The decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which

147. ## physics

a 9000 kg railroad car moving at 3 m/s strikes a stationary 5000 kg railroad car .what is the momentum of the 9000 kg railroad car before the collision?

148. ## statistics

How do you find standard deviation?

149. ## Math

Jillian must average at least 90 on two quiz scores before she can move to the next skill level. Jillian got a 92 on her first quiz. What scores could Jillian get on her second quiz in order to move to the next skill level? Please help me and show your

150. ## math

if a 6 foot vertical rod casts a shadow 15 feet long, how high is a flagpole that casts a shadow 60 feet long? i know this is multiplication, but i don't know how to set it up. 10 feet?

152. ## Physics

How much heat is required to melt 50 g of mercury at -45 degrees celsius to 425 degrees celsius. (melting point=-38.degree-c, specific heat=0.03325 cal/g-degree c for solid mercury, .2988 cal/g-c degree c for liquid mercury and .2486 cal/g-c degree for

153. ## AB Calculus

So I'm supposed to verify the solution of the differential equation. The solution is y=e^(-x). The differential equation is 3y' + 4y = e^(-x). What is the problem asking me to do here?

154. ## physics

a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine? Please help power= work/time= 1/2 m v^2/8 1/2(1500k)(30)^2 2/8 =168750 is this correct?

155. ## physics

0 Search Results for A 50.0 kg student climbs 5.00 m up a rope at a constant speed in 12.3 s. what's the force the student uses to climb the rope

156. ## Physics

A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 73.0-kg water-skier has an initial speed of 7.1 m/s. Later, the speed increases to 10.9 m/s. Determine the work done by the

157. ## Chemistry

Calculate pH for strong base solution: 1.100 g of KOH in 550.0 mL of solution

158. ## maths

Given that the ellipse x^2/a^2 + y^2/b^2 =1 has foci at(+/-ae,0)where e is the eccentricity and b^2=a^2(1-e^2),find the coordinates of the foci and the value of e^2 for the ellipse X^2+4y^2 =16

159. ## science

A student observes a cell with many mitochondria. This cell is most likely what type of cell?

160. ## Math

You play a game where you win $1.00 for each dot that turns up on a fair die (has 6 sides). You pay$3.50 to play the game (and the money is not returned). Find the expected (average) winnings for this game.

161. ## Science

A student observed two different types of cells under a microscope. She noticed that one cell had many more mitochondria than the other. What can the student predict about the cell with more mitochondria? A. The cell produces more waste. B. The cell makes

162. ## Written Communication

• Choose a topic from your personal knowledge and experience. Remember that you must utilize your first-hand experience to prove your authority to write on a topic. Purely generalized and/or factual information is not acceptable. • Capture your

163. ## Economics

Hi, I was wondering if you know any good websites were I can review for a grade 12 economics exam?

165. ## statistics anova

a professor is interested in whether there is a differnce in counseling student's statistics competency scores among 1) those who have never taken any statistics ourse, 2) those who have only taken an undergraduate statistics course, 3)

166. ## english

i need help in forming my ideas into good sentences. i taken all these ideas from a movie that we watch from the class 1. Water is the source of life, we all depend on it,Water is important, We cannot survive a week without water 2. Water should be free,

167. ## Physics

A 3.50 kg mass, m, on a frictionless table is moving in a circle with radius 0.420 m at a constant speed. m is attached to a 6.40 kg mass, M, by a cord through a hole in the table. Find the speed with which m must move for M to stay at rest.

168. ## english

Is this sentence a simple, complex, or compound sentence? I believe that it is a complex sentence because it is not two sentences put together, is that right? The teacher returned the homework since she was finished grading it.

169. ## Science

State the two broad classes of wood and describe them.

170. ## Calculus

flickr.(dotcom)/photos/77304025@N07/6782789880/ Create a function that closely gives the graph given below. The function may be a piecewise function but it does not necessarily have to be a piecewise function. a. Give a brief narrative explaining what you

171. ## Math

flickr.(dotcom)/photos/77304025@N07/6782789880/ Create a function that closely gives the graph given below. The function may be a piecewise function but it does not necessarily have to be a piecewise function. a. Give a brief narrative explaining what you

172. ## psychology

what are some problems I can discuss that are created by stereotypes based on gender, race, age, and sexual orientation?

173. ## Physics

Object 1 (mass=5.5 kg) traveling in the +x direction at a speed of 12.40m/s undergoes an inelastic collision with Object 2 (mass=4.80kg) which is at rest. Object two flies off at a speed of 7.80m/s and an angle θ2=32.4 °. It is possible that Object 1

174. ## Written Communication

• Choose a topic from your personal knowledge and experience. Remember that you must utilize your first-hand experience to prove your authority to write on a topic. Purely generalized and/or factual information is not acceptable. • Capture your

218. ## PHYSÝCS

The figure shows the paths of a golf ball your friend drops from the window of her apartment and of the rock you throw from the ground at the same instant. The rock and the ball collide at x = 34.14 m, y = 17.75 m, and t = 2.71 s. If the ball was dropped

235. ## biology

list 2 forms of oxygen found in the atmosphere name the process by which oxygen from the atmosphere is used up oxygen is returned to the atmosphere

236. ## math

How do you figure the next geometric sequence of 90,18,3.6,073

237. ## Math (Area)

I need help on where to begin with this problem. You are installing a new deck around your pool. The pool is rectangular with the dimensions 8m by 4m. The deck will surround the pool and will have a width by 2m. What is the area of the deck? I know that

238. ## english

What is the meaning of address with 5 sentences

239. ## health

generally having a positive outlook, being comfortable with self and others, and being able to meet life's challenges.

240. ## algrebra

John wants to rent a car. He knows that a friend used XYZ rental agency in the past. His friend paid $65 to drive 50 miles and$74 to drive 80 miles. What is the linear function the agency uses to find the cost?

241. ## english

sorry for posting it again i just need some help with proof read original thread display.cgi?id=1330379031 1. Water is the source of life. We all depend on it. Water is important, and we cannot survive a week without it. 2. Water should be free; it is a

242. ## help!!!!!!!!

in the days of king adobe, what is a charactertrait describing the two travelers.give two examples to support your description. I picked sneaky. I only know one supporting detail.I need help finding the other supporting detail.

243. ## chemistry

If the reaction Cl2 (g) + O3 (g) = Cl2O (g) + O2 (g) occurred in just two steps, what would be the overall order of the reaction be? a. 1 b. 2 c. 3 d. 4 e. not possible to determine from the information given i have absolutly no idea how to do this

244. ## why will no one answer? chem

If the reaction Cl2 (g) + O3 (g) = Cl2O (g) + O2 (g) occurred in just two steps, what would be the overall order of the reaction be? a. 1 b. 2 c. 3 d. 4 e. not possible to determine from the information given i have absolutly no idea how to do this

245. ## Math

Laurie is holding 6 red cards and 7 black cards. If two cards are selected at random(w/out replacement), what is the probability that the first card selected is red and the second is black?

246. ## English

What is the best connotation for this sentence. Nila likes her chili very hot, burning, or warm.

247. ## Essay Check

My parents always told me to brush my teeth morning and night, but it was not until high school that I actually realized why I did that. So imagine my parents learned from their school and encouraged me, but if a villager living in a shanty town does not

Use Lagrange multipliers to find the max/min values of the function f(x,y)=xy subject to the constraint: x^2/8+y^2/2 =1 so I compare the gradient vectors of both f(x,y) and the constraint: =L resulting in y=Lx/4 and x=Ly now how do i solve for L x and y???

249. ## Math for Liberal Arts Major

Find the solution set for the following inequality: x+1>1/2x-11

250. ## Math

Transform the equation by completing the square: 4x^2 + y^2 - 8x + 6y -3 =0 Also show foci

251. ## COLLEGE CALCULUS. HELP!

1. If f(x)=sin(x^2), Find f'(x) and f'(1) 2. If d/dx(f(3x^3))=9x^2, Calculate f'(x). 3. Let f(x)=cos(6x+6), find f'(x) 4. Let f(x)=-2sec(2x), find f'(x)

252. ## Chemistry

I'm having a difficult time with the Conversion Units in my equation. Attempting to answer this question: My cell phone has an antenna about 10.00cm long. If this is one quarter of the wavelength of the radiation, at what frequency in Megahertz does it

253. ## Math pleez help

Multiply ( x-1) (2x(2)-xt5)

254. ## chem

How much energy is required to raise the temperature of 217 g of solid mercury at its freezing point to mercury vapor at its boiling point.

255. ## General Chemistry

How do I calculate the ratio of weak base to weak acid in a methyl amine buffer solution at pH=10.645 and pH=11.645 and pH=9.645?

256. ## math

A student observes two different types of cells under a microscope. She noticed that one cell had many more mitochondria than the other. What can the student predict about the cell with more mitochondria?

257. ## MATH

in the diagram below,

258. ## algebra2

Can you explain how to factor the following trinomials forms: x2 + bx + c and ax2 + bx + c. Can there be more than one way to factor a problem like this? can you please show it in written word and step by step?

259. ## math

There is 10 white,9 black and 7 red balls in a bucket,In how many ways we can select one or more balls?

260. ## prealgebra

Find the new amount. #6) Decrease 8 by 75%. #7) Decrease 135 by 22%. I don't know how to solve and show work

265. ## PHYSÝCS

At the end of the spring term, a high school physics class celebrates by shooting a bundle of exam papers into the town landfill with a homemade catapult. They aim for a point that is 31.1 m away and at the same height from which the catapult releases the

266. ## Math. Proportions

Can u check these. ? What percent of 230 is 23? I got : 28.75% is this. Right? 80% of what number is 15? I got : 18.75% is that right? Word problem A school holds classes from 8a to 2p For what percent of a 24hr day does this School hold class? I got 25%

268. ## physics

A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance. 1/2 m v^2= mgh v= sqrt

269. ## algebra

how to make a 4x4 magic sqaure which equals 18

270. ## Math

Can the angles 51,88, and 41 form a triangle?

320. ## trig

Choose the percent increase or decrease for the before and after measurements: 12 (before) and 12 (after) a) not given b) increase of 30% c) decrease of 25% d) increase of 25%

321. ## math

The second place finisher in the canoe race lost to the winner by only 1/12 of the winner,s time. If the winning time was 3 1/5 minutes,by how many seconds did the runner up lose?

322. ## math

Which of the following best describes the relationship between the size of a one ounce container compared to a one pound container? 1 the size of a one oz container is 16 times the size of a pound container. 2 the size of a one oz container is 1\16 the

323. ## PHYSÝCS

please any one help me for this questionnnnnnnn ý need urgently At the end of the spring term, a high school physics class celebrates by shooting a bundle of exam papers into the town landfill with a homemade catapult. They aim for a point that is 31.1 m

324. ## math

A driver is headed north on a long, straight highway and sees this sign: Nearville 150 miles Farville 160 miles Then, surprisingly, an hour later she sees this apparently inconsistent sign on the same highway: Nearville 100 miles Farville 109 miles How can

325. ## Mat/117 DQ2

Quadratic equations may be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods? Please provide examples. When might each method be most appropriate? Which method do you

326. ## chemistry

balance: Al(s)+H2O(g)--->Al2O3(s)+H2(g) what is the correct equilibrium expression?

327. ## maths

If the side of triangle are equal, and it was made by placing beads touching it other, how many beads would you use if there are 3 beads on each side?

328. ## math

Ray makes an array that has 4 rows of 4 counters. He wants to make 2 more arrays using the same numbers of counter. Than he wants to move 1. What 2 arrays can he use

329. ## yargo

a garden is shaped like an x. there is a right angle at each corner of the garden and each side of the garden measures 40 feet long. what is the area of this garden?

330. ## calculus

A light is attached to the wall of a building 64 feet above the ground. A ball is dropped from the same height, but 20 feet away from the side of the building. The height y of the ball at time t is given by y(t) = 64 − 16t 2 . How fast is the shadow of

331. ## bio

Many studies have shown that extinction is a natural process that occurred long before humans ever evolved. Explain the importance of conservation genetics in the survival of endangered species. Why should we be so concerned about extinction now?

332. ## Mathematics

What percentage is 2/27?

333. ## English

Writeacher,can you please check if everything is correct? Thank you. 1) Can you give me a hand to finish this exercise, please? 2) The answer to your question is on he tip of my tongue. 3) Behave yourself! Don't shrug your shoulders! 4) I can't see at a

334. ## english fixed-3

here's what i did for number 4. The world is deserting because we are taking water for granted. If people continue to waste water, the earth’s structure will change and it will be the main cause of earthquake and potentially a tsunami. and for number 5.

353. ## PHYSÝCS

please any on help me for this question ý need urgently. The position of a particle moving along the x-axis is given by x = 3.49t2 – 2.21t3, where x is in meters and t is in seconds. What is the position of the particle when it achieves its maximum

354. ## Algebra

Evaluate T = 50m + 300, for the total amount of money Susan has after 5 months

355. ## Basic Math

How do you solve: 5/30 + 3/40 + 1/8

356. ## math

I want to put a 3ft wide walk around a 10ft by 15 ft pool. What is the perimeter around the figure including the path?

357. ## trig

Tan(cos inverse 5x)

377. ## Grammar

I am studying my pronouns right now for sixth grade, while i was looking over the words,i saw that the word THAT is a pronoun, how can it be a pronoun?

389. ## math

Transform the equation or inequality by completing the square. x^2+y^2+4x-10y+20

390. ## Science

what are the positives of NOT having technology ?

391. ## mlk

how did jane goodall solve the problem of living alone in the jungle

392. ## psycology

the meaans of travel within and between neurons is different because

393. ## English

Do you capitalize mom in the phrase your mom?

394. ## algebra

-x^3+x^2+4x-5=0

Need a copy of pages 163 and 164 from Business and Administrative Communication, 8th edition

396. ## math

what is one fourth of 10?