# Questions Asked onOctober 15, 2011

1. ## Trig

Find the exact value of tan 5pi/12 using the half-angle identity.

2. ## physics 911

A force ~F = Fx ˆı+Fy ˆ| acts on a particle that undergoes a displacement of ~s = sx ˆı + sy ˆ| where Fx = 10 N, Fy = −1 N, sx = 5 m, and sy = 3 m. Find the work done by the force on the particle. Answer in units of J b) Find the angle between ~F

3. ## Math

Lee Holmes deposited $16,600 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional$41,600 at 9% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s

4. ## computer

suppose the 640GB western digital hard drive install in the RAID array has failed, find a replacement drive as close to this drive as possible. print three web pages showing the size, features and price of three possible replacement

5. ## physics

Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as in Figure 7.10, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic

6. ## Physics 114

You are riding in a boat whose speed relative to the water is 7.2 m/s. The boat points at an angle of 25.7° upstream on a river flowing at 14.1 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 24.5 m wide.

7. ## statistics

a die is rolled 7 times. find the probability of getting at least one 3.

8. ## college algebra

how long will it take an investment of $5000 to grow to$8000 if it is invested at 7.8% per year compounded weekly?

9. ## CHEMISTRY

AT A CERTAIN TEMPERATURE, THE REACTION CO(g) + 2H2(g) CH3OH (g) has Kc = 0.500 CO= 0.180 M H2= 0.220 M WHAT IS THE CONCENTRATION OF CH3OH?

10. ## CHEMISTRY

IDENTIFY THE CONJUGATE ACID-BASE PAIR IN THE FOLLOWING REACTIONS. A) HSO4^- + SO3^2- HSO3^- + SO4^2- B) S^2- + H20 HS^- + OH^- C) CN^- + H3O^+ HCN + H2O D) H2SE + H2O HSE^- + H3O^+

11. ## physics

When you push a 1.70 kg book resting on a tabletop it takes 2.60 N to start the book sliding. Once it is sliding, however, it takes only 1.50 N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction between

12. ## physics

When you push a 1.70 kg book resting on a tabletop it takes 2.60 N to start the book sliding. Once it is sliding, however, it takes only 1.50 N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction between

13. ## Chemistry

Hi Please help verify my answer to the following question: 0.500g of pure phosphorous was burned in excess pure oxygen to give a product that has a mass of 1.145 g. What is the empirical formula of the resulting compound? By the use of a mass spectrometer

14. ## calculus

A trough is 12 feet long and 3 feet across at the top. It ends are isosceles triangles with a height of 3 feet. If water is being pumped into the trough at 2.5 cubic feet per minute, how fast is the water level rising when the water is 1 foot deep?

15. ## Physics

Relative to the center of the Earth, the position of the Moon can be approximated by (t) = r [cos (ωt) + sin (ωt) ], where r = 3.84 108 m and ω = 2.46 10-6 radians/s. (a) Find the magnitude and direction of the Moon's average velocity between t = 0 and

16. ## chemistry

show how CH4 +O2=CO2+H2O obeys the law of conservation of mass

17. ## chemistry

How many grams of carbon disulfide,CS2 will form if 0.450 mol of carbon is consumed in a 3C+2SO2=CS2 +2CO2 reaction

92. ## chemistry

A certain compound contains only vanadium and oxygen. A 35.00 g sample of the compound contains 19.61 g of vanadium. Determine the empirical formula of this compound.

Im writing a character analysis on the main characters on the movie Heathers but im having a hard time if anyone has seen this movie and understands the characters please help. p.s I went to the websites on google and they havent helped hopefully one of

94. ## geometry

show that points A= (10,12,13), B=(13,14,14), and C=(18,18,16) are not collinear

95. ## Chemistry

If 1.000g of (potash) K2CO3 reacts with H2SO4 to produce 145 mL of CO2 gas at STP, what is percentage of Potassium Carbonate in the marble sample?

96. ## algebra

Find all positive solutions to: x^6 + 7x = 4x^4 - x^2 + 8

97. ## Maths

Simplify 3x-5(2x-4)

98. ## parphrasing

can somebody please help me paraphrase this please ?? For any state to make sex a qualification that must ever result in the disfranchisement of one entire half of the people, is to pass a bill of attainder, or, an ex post facto law, and is therefore a

99. ## math

Three di erent numbers are chosen at random from the set f1; 2; 3; 4; 5g. The numbers are arranged in increasing order. What is the probability that the resulting sequence is an arithmetic sequence?

100. ## math

What temperature is numerically the same in degrees Celsius and degrees Fahrenheit?

101. ## English

The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed.

102. ## English

Identify what is wrong with the following sentence and make any corrections necessary: “I can’t stand drivers that tailgate other cars it is just plain dangerous to do so.

103. ## owning

The __________is the contract that seals the deal when you buy a car. A.loan application B.warranty C.loan agreement D.sales agreement i got C

104. ## Research Methods

A researcher wants to obtain a random sample of the 800 cows from a local farm. He decides to ask the farmer to give him the ear tag numbers of 100 cows he can use in his study. The researcher puts these tag numbers into a hat and randomly chooses 40 to

105. ## Science

Why do lithium and sodium exhibit similar chemical behavior?

106. ## science

Under what circumstances would you expect the shared electron pair to be equal distances on the average from each of the atoms participating in a covalent bond?

107. ## statistics

draw a distribution curve that represents the following distribution of scores: results of 6th grade math test given to college students

108. ## Algebra 2

Describe the end behavior of the graph of the polynomial function. Then evaluate the function for x=-4, -3, -2, -1, 0, 1, 2, 3, 4. Then graph the function.y=x^4-2x^2-x-1 and y=(x-3)(x+1)(x+2)

which part of the comprehensive financial plan do rent and food fall under

110. ## Stats

A Math test has a mean of 51 and standard deviation of 5.0. Find the corresponding z scores for: I. a test score of 64 II. a test score of 47

111. ## Biology

What does it mean to say that two genes are "linked"? Can linked genes assort independently? Why or why not?

112. ## algebra

fidn all solutions to x^4 + 3x^2 = 4x^3 + 1

113. ## math

The mass of one electron is 9.11 * 10(negative 28) grams. A uranium atom contains 92 electrons. Find the total mass of the electrons in a uranium atom. Express your answer in scientific notation.

114. ## physics

a sprinter exerts 850N on the starting blocks at 25 degrees to the horizon at the beginning of a race. what is the vertical force exerted at the blocks?

115. ## nonfiction

Thoreau writes that people should be "mining themselves for gold." By this he is stating, in another way, the ideal of Socrates, which was to A. know thyself. B. deny thyself to learn what is valuable. C. live and let live. D. put first things first

116. ## English

Identify what is wrong with the following sentence and make any corrections necessary: “I went the campus bookstore and purchased my textbooks, a few folders and a pair of AiPO socks.

117. ## calculus

Consider the function y=x/(x+1) a) Find dy/dx b) Find the equation of the line tangent to the curve at x=-2 c) Find the equation of the line normal to the curve at x=1

118. ## english

the difference between a dash and a hyphen. Compose sentences of your own to illustrate your points.

119. ## math-a-matic

okay...is this even possible? because i've tried every way i can think of, and i think this might be impossible to solve? the problem is: find five consecutive odd integers such that the sum of the first and the fith is one less than three times the

120. ## PHI103 Informal Logic

Assume Mary is forced to let her children go hungry or steal some food from a local grocery store. Which should she do? Construct an argument that supports Mary's decision to steal the food or an argument that shows why Mary should not steal the food.

121. ## social studies

whats the holy book of islam

122. ## calculus

Find the equation of the line that is tangent to the graph of: x^2cosy +5y^2=(1/4)x^2 , at the point (2π,π)

123. ## algebra

Considering the following equation: 4y + 7x = -23 I have to solve the equation for y, but I can't use mixed numbers in my answer.

124. ## math

pls. help... The functions f and g satisfy f(x) + g(x) = 3x + 5 f(x) - g(x) = 5x + 7 for all values of x. Determine the value of 2f(2)g(2).

125. ## algebra

Make a box with a square base using only 250 square feet of material. what dimensions for the box will produce a maximum valume? what is the maximym volume?

126. ## Stats

Start with x=75 and add four x values to make a smaple of five data such that the standard deviation of these data equals 0.

127. ## physics

a sprinter exerts 850N on the starting blocks at 25 degrees to the horizon at the beginning of a race. what is the vertical force exerted at the blocks?

128. ## Math

The universal law of gravitation determines the amount of force exerted by a constant mass (M) on another constant mass (m), separated by a distance (r), is given by the expression F = ( -GmM )/r^2 a) What mathematical expression characterises the instant

129. ## chemistry

Mass of tablet is 1.3183g, concentration of HCl 0.1807M, concentration of NaOH 0.1481M, volume of NaOH used 20.36 ml then milimoles of HCl added ?, milimoles of NaOH used ?

130. ## Spanish

Why do people have classes like spanish & french in middle high school ??? I'm curious

131. ## physics

a cannonball is fired horizontally straight up at a modest speed of 9.8. Compute its maximum altitude and the time it takes to reach that height

132. ## Research Methods

A researcher wants to attain a random sample of young drivers who have received DUIs within the last year. Using the PREP system, he asks all first year students at WLU who have received a DUI to volunteer for the study. Thirty-five students actually admit

133. ## history

The entrance to many Egyptian tombs was inscribed with a course or warning,designed to protect the tomb from raiders who might want to steal the treasures within.What would you write to warn off tomb raiders?

134. ## spanish

should I use desde, desde hace or hace in this sentence ------ poco compre un coche

135. ## social studies

who is the mayor of Susquehanna?

136. ## social studies

what is the population in Susquehanna?

137. ## physical

height=42m,speed=250m/s, how long will the object remain in air?

138. ## calculus

Given the function: f(x)=x^3-4x^2+6x-3 a) Find the average rate of change of the function on the interval [2,4] b)find the instantaneous rate of change of the function at x=3.

139. ## English

Hi I have to write about the following and I have no idea what to write. Please help I am so confused, thanks. Identify two parallels (or thematic echoes) between Synge's Playboy of the Western World and Sophocle's, Oiedipus the King. What is the

140. ## algebra

solve system of equations: y = 2x^3 - 2x^2 y = -6x^2 +30x I know (0,0) is one point. How do I get others?

141. ## Stats

A set of 50 data values has a mean of 15 and a variance of 36. Find the standard score of a data value = 30

142. ## law

For an attorney, one of the most common negative aspects of the contingency fee is: (Points: 5) a. that the client may not pay him. b. the high degree of risk involved in the litigation. c. that the costs may be too high. d. that the judge may not grant

143. ## mirror images

Can someone please explain what mirror images to me in simple terms.

144. ## Chemistry

Calculate your Kinetic Energy in Joules if you weigh50 kg and you are walking 2 meters/second. This is what I did: KE is Ek=1/2mv^2 So it would be Ek=1/2(50kg) x 2m/s Then I convert kg to pounds. There are .454kg in 1 lb so 50(.454)=22.7lbs

145. ## math

What are two equivalent fractions for 3/10 and 7/13 and 15/33?

146. ## Physical Science

Why is the viscosity of a liquid important?

147. ## math

what is 27+49%7=

148. ## Social Studies 9

Similarities and Differences between lord protector and reign of terror. PLEASE I NEED HELP !!!!

149. ## Social Studies 9

Similarities and Differences Between Puritans and Jacobins; please don't link me a google search, i already searched it up and none of them were what i was looking for. i need 3-4 facts for each section. THANK YOU .

150. ## Calculus

Compute lim √(3-s)-√(3+s))/s s→0⁡

151. ## English

I've chosen five sentences but I hope the other were possible.Thank you. 1) What are people intolerant about (is "of" also possible)? They are intolerant about the color of the skin, religion and clothes. 2) In the past, she got hurt (is "offended"

152. ## english

. Identify which one of the following sentences contains an unnecessary comma. Please correct the error and explain why the correction is necessary. a. I must have been completely absorbed in my work, because I totally forgot about the meeting. b. Because

Posted by anne on Saturday, October 15, 2011 at 1:03am. Hi, Please advise on the following: - A procedure for the determination of Impurities A & B in a compound says to use a 4.6 x 150mm x 3um column (stationary phase: octadecylsilyl silica gel). The

155. ## English

Where can I find out the history of the words difficult and challenge and be able to write a paragraph on them each? Tried Google.

156. ## physics

A cable is used to raise a 30 urn from an underwater archeological site. There is a 29 drag force from the water as the urn is raised at a constant speed.

157. ## tanks

the weight of a elliptical tank

158. ## Comp 156

Using the Internet, find two examples of what you consider biased writing about the effect of videogames on children?

159. ## owning

The __________spells out the new owner's repayment obligations when finacing a new or used vehicle. A.lone agrrement B.sticker C.buyer's guide D.loan application i got A

160. ## Fibonacci Numbers

I posted the question several days ago and Mathmate helped to guide me along. I am just unsure if I do not understand what he is saying or if I did complete the problem right. I would appreciate any input. 1.618034 - -.618034 = 2.236068/sqrt 5 = 1.00000 I

161. ## Biology (genetics)

The RAS protein acquires a mutation that prevents release of GTP. Which of the following characteristics are these cells likely to acquire? a)Self-sufficiency in growth signals b) insensitivity to anti growth signals c) angiogenesis d) metastasis e)

162. ## English

I urgently need to know if the following sentences are all possible. Thank you. 1)I didn't know your address but I manged to/was able to/ (but not could) find you. 2) When I was young, I was able/could play the guitar quite well. 3) I called Mary many

163. ## English

Could you check this sentence for me, please? Thank you. She offered/agreed/promised to drive me to the airport.

164. ## law

An alternative to an hourly rate is a/an __________ rate. (Points: 5) cost advertised family fixed Is it "Fixed"

165. ## law

The legal business is a __________ industry. (Points: 5) regulatory statutory service judicial is it "Statutory"

166. ## cultural diversity

I already talked about skin tone and using IAT test to do a survey I need to know what other measurements sociologists utilize to calculate prejudice

167. ## English

. Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary. a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and

168. ## Research Methods

A personal trainer wants a random sample of her clients. She gets the list of all her clients from the gym manager and assigns each one a number. She then uses a table of random numbers to select 50 clients from the list.

169. ## film

Was Heather Duke smart in the movie Heathers

170. ## math

let w represent the number of words and m represent the number of minutes. Write a rule to show the relationship between w and m. 280 words in 8 mins

171. ## algebra

how to work y= -x-4

172. ## social studies

what are the metropolitan area of Susquehanna?

173. ## social studies

what landmarks and attractions are in Susquehanna?

175. ## math

pls. help.. The functions f and g satisfy f(x) + g(x) = 3x + 5 f(x) �� g(x) = 5x + 7 for all values of x. Determine the value of 2f(2)g(2).

176. ## english

what do you call a person who can not function with out a leader

177. ## algebra 2

decribe the end behavior of the graph of the polynomial function.then evaluate the function for x=-4,-3,-2...,4. equation is y=x^4-2x^2-x-1

178. ## science

what is the discharged rate of water leaking at a 4 inches diameter pvc pipe with pressure of 35 psi and a leak hole of 5 mm in diameter