# Questions Asked onNovember 20, 2011

A student is asked to standardize a solution of barium hydroxide. He weighs out 0.945 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 33.9 mL of barium hydroxide to reach the endpoint. A. What is the molarity of the

a bicyclist is finishing his repair of a flat tire when a friend rides by at 3.5 m/s. two seconds later, the bicyclist hops on his bike and accelerates at 2.4 m/s^2 until he catches his friend? (a) how much time does it take until he catches his friend?

21. ## health

4. What is the ideal length of time for a cool-down following an intense workout? A. 15 to 20 minutes B. 5 to 15 minutes C. 0 to 3 minutes D. 3 to 5 minutes i think its b?

22. ## Chemistry

Using grammatically correct English sentences describe how the nature of the bonding in MgF2 (s) and Zn(s) differ. (Don't just name the different types of bonding-describe how they are different. Which of the following are metallic? F2(g), Co(s), NaCl(s),

23. ## physics

A car traveling at 91.0 km/h approaches the turnoff for a restaurant 30.0 m ahead. If the driver slams on the brakes with an acceleration of -6.40 m/s^2, what will her stopping distance be?

24. ## physics

On a brisk walk a person burns about 325 Cal/h at this rate how many hours of brisk walk would it take to lose a pound of body fat

87. ## world history

Which of the following was a Chinese school of thought during the fourth century B.C.E. that denounced ethics in favor of obedience? A. Buddhism B. Confucianism C. Daoism D. Legalism i concluded D what you think

88. ## broward college

a decrease in demand for a product, holding other things constant, will

89. ## Calculus

Differentiate x^2*y^2 = (y+1)/(x+1) in terms of x and y. PS My answer is unfortunately at odds with that provided by the authors of the book (i.e. -y (y+1) (3x+2) all over x (x+1) (y+2), and I don't know whether it's a misprint or my method is wrong.

90. ## Chemistry

Why water is a weak electrolyte?

91. ## CALCULUS

evaluate the integral of (e^3x)(cosh)(2x)(dx) A.(1/2)(e^5x)+(1/2)(e^x)+C B.(1/10)(e^5x)+(1/2)(e^x)+C C.(1/4)(e^3x)+(1/2)(x)+C D.(1/10)(e^5x)+(1/5)(x)+C

92. ## math

given sinθ=-5/13 and π

93. ## geometry

ABCD is a rectangle. If AC=5x+2 and BD=x+22, find x.

94. ## chemistry

20g of nitrogen gas and 10g of helium gas are placed together in a 5L container at 25C . Calculate the partial pressure of each gas and the total pressure of the gas mixture.

95. ## maths

how do you simplify surds?

96. ## mechanic fluid

A kite weighs 9.8N having an area of 1m square makes an angle of 7.5 degree to the horizontal when flying in a wind at speeds of 35km/h. If the pull on the string attached to the kite is 50N and is inclined to the horizontal 45 degree. Determine the lift

97. ## physics

a football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.18 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?

98. ## college chemistry

Hydrogen gas is produced when zinc reacts with sulfuric acid: Zn(s)+H_2SO_4(aq)---ZnSO_4(aq)+H_2(g) If 160 mL of wet H_2 is collected over water at 24 Celsius and a barometric pressure of 739 torr, how many grams of Zn have been consumed? (The vapor

99. ## Math homework

Please help me to solve In your industrial oven, you bake two baking sheets with 12 scones each, two baking sheets with 20 cookies each, and one baking sheet with 2 scones and 10 cookies Write an expression that illustrates the total cost of all baked

100. ## Algebra

Could anyone help me write a system of equations with this? Thanks - A theater group sold a total of 440 tickets for $3940. Each regular ticket costs$5, each premium ticket costs $15, and each elite ticket cost$25. The number of regular tickets was three

101. ## science(Ms.Sue)

What does a maple tree do for a community? A)it creates energy B)it creates food C)it looks nice D)it stores water My answer is b,am i right?

103. ## economics

when you are given the units of resource, total product, and marginal product, what do you need to find to determine how many resources the firm will employ, what the MRP would be etc...

104. ## chemistry

what is oxidation state of NO2

105. ## Chem-Repost

it wouldn't let me post after putting spaces in the url and everything, so i just copied and pasted the q instead :P sorry for all the messyness. i'll see if i can delete q's, in the mean time you can maybe look at this please? Initial rate of rxn of

106. ## trigonometry

if cosθ=2/3 and tanθ

107. ## Math

the figures are similar. the are of one figure is given. find the area of the other figure to the nearesr whole number. the area of the larger triangle is 1,589 ft squared

108. ## physics

a disk has a mass of 2kg and a length of 2 meters and it oscillates about an axis that is 1.5 meters from the center of the disk. It is initially displaced at an angular displacement of 0.2 radians and released. A) What is the equation of motion? B)What is

110. ## English

Could you please check these sentences, too? I tried to rephrase the first lines again. 1) Hamlet wonders whether it is better (for him) to endure the assaults of shameless fortune ("the slings and arrows of an outrageous fortune") or to fight against his

111. ## physics

If the brisk walk were done at 4.0mi/h how far would the student have to walk to burn pound of fat

112. ## Calculous

let f be the function defined by f(x)=12x^2/3 -4X a)find the intervals on which f is increasing I got the rest of the question but I'm still not getting the increasing/decreasing thing

113. ## NJHS

what do you do at the National Junior Honor Society Induction Ceremony?

114. ## English

Thank you very much. I still need your help to revise a few more lines. 1) A quietus was a statement which released an accountant from his responsibility for the accounts he was working on; the full Latin phrase was quietus est, “it is at peace”, i.e.

115. ## physics

A 83-kg worker clings to a lightweight rope going over a lightweight, low-friction pulley. The other end of the rope is connected to a 66-kg barrel of bricks. If the worker is initially at rest 16 m above the ground, how fast will he or she be moving when

116. ## chemistry

how can you tell if a combination in a mixture forms a precipatate or not?How can you tell from the sollubility table?

117. ## English

Which new ideas on the relationship between Wilde’s life and art does the first half of De Profundis provide

118. ## English

I tried to clarify the last concept. Thank you for helping me. 1) The image is of the face which loses its healthy red colour and becomes pale when the body is sick. The kind of thought which prevents men from committing suicide is not far from a moral

119. ## history

where can i get facts about winchester cathedral

120. ## algebra

an insect flies 20 ft. in 1 s. how fast does the insect fly in miles per hour? round to the nearest hundredth if necessary.

121. ## Pre Calculus

Find a third degree polynomial P(x) that has zeros at x=-1, x=1, x=2 and whose x-term has coefficient 3?

122. ## Chemistry

Taking into account the "Second Law of thermodynaics", what is the maximum percentage of heat at 700 C that can be converted into electricity if the waste heat was produced as steam at 100 C?

123. ## diff eqn.

y(t) = -0.2451 cos 4t + 0.9804 sin 4t + e^(-3t ) (A cos⁡〖t+B〗 sin⁡〖t)〗 y'(t) = ?

124. ## science

Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A or B. A)Damaged DNA must be identified by DNA repair proteins B)The sequence of nucelotides in the damaged DNA sequence must guide the synthesis

125. ## optimization calculus

A piece of wire 25 m long is cut into two pieces. One piece is bent into a square and the other is bent into a circle. (a) How much of the wire should go to the square to maximize the total area enclosed by both figures? (b) how much of the wire should go

126. ## science

what is the concentration of a sugar solution that contains 8 g sugar dissolved in 500 ml of water? explain in ration form

127. ## math

what are the next 3 terms? 12288, 3072 768 192

128. ## Geometry

the measure of each exterior angle is 45. how many sides does the polygon have?

129. ## physics

a 8.0 kg object undergoes an acceleration of 2.2 m/s squared.what is the resulting force acting on it?

130. ## Science

When is it appropriate to use groundwater at a rate faster than the rate of recharge? Explain. I'm doing an assignment which has this as one of the questions I have to answer. I've been searching online, research articles as well as goggle searches, but so

131. ## english

The groom's family presented this letter to the bride's family. is presented an action( physical or mental) verb also It formally accepted the bride into the groom's family. is accepted (physical or mental) action verb?? I think presented is physical and

132. ## History

can someone help me make a really short, brief history of Chad,Africa?

133. ## calculus

integrate (5-4x^3+2x^6)/(x^6) Just not getting it.

134. ## college Algebra

so i am suppose to to find the max value attained by… g(x) = -3x2 - 24x - 18. but my teacher said "There is a difference between determining the maximum value and naming the location of the maximum value." what does that mean??

135. ## College Algebra..LOG

log4(little four) (40 - 3x) = 0 now i need to solve for x...

136. ## Math

4/3 x (4/3) If you multiply what would it be please show steps and answer

137. ## chemistry

Balancing redox equations reactants: Cu, NO3^- (the negative sign is nex to the O, above the 3). products: Cu^2+, NO2 Medium: Acidic Cu+ NO3^- ----> Cu^2+ + NO2 Okay, I don't understand how to do this problem...but something someone needs to clear up for

139. ## Math

How do I estimate these? 1. 7/8 + 3 1/4 2. 5 1/9 - 2/3 3. 9 5/6 divided 2 1/8 4. 6 divided 1/2

140. ## linear math

Let u=(2,0,k,-1) v=(-4,0,-3,2) and w= (0,1,0,0). Each answer must be justified(there is no answer where k=nothing) a) find all values of k, (if any) for which u is orthogonal to v b) Find all values of k (if any) for which the set {u,v,w} is linearly

141. ## math

according to a recent survey 38% of americans get six hours or less of sleep each night. if 75 people are selected to participate in a sleep survey, find the probability that 30 or more of them get six hours of sleep each night

142. ## math

cos 23pi/12 i tried doing it and i got 0.994.. is that right? can someone explain how to do this to me? thanks!

143. ## math problem

Can you determine which number corresponds to the situation THe record high temperature for a date is 95.6 degree above zero What is the corresponding number for this sentence.

144. ## Physics

What type of mirror is used whenever a magnified image of an object is needed? They say its convex but why? i though convex mirrors reduce an abject ?? plz help

145. ## NJHS Application

What does it says in the NJHS Application when they give it to you?

146. ## English topic sentence please pick one

What does it mean to untie the knot of renunciation? It means all the promises made to one another by a couple in a marriage ceremony have been broken which ends with a divorce. or What does it mean to untie the knot of renunciation? It means getting a

147. ## English

I left out a few more sentences. I really hope you can check them,too. 1) Hamlet considers the reasons which may lead us to take our own life. He thinks of the punishments and insults which people who are good and quiet take from those who are unworthy. 2)

148. ## English

I really need you to consider this rephrase of Hamlet's monologue "To Be or not To Be" and help me check it. I added a few more things and I'd like know your opinion. Thank you. 1)Hamlet wonders if it is better to bear the slings and arrows of outragous

149. ## statistics

Find 10-th, 60-th and 75-th percentiles in each of your data set, then write down each value that corresponds to those percentiles. Now use those values to find sample percentiles empirically (Suppose value “a” corresponds to 10-th percentile in my

150. ## physics

a gate 6m wide requires a force of 5.2 kg.wt. applied at the end to open it. what force would have to be applied (A) at the middle and (B) at 1.5m from the hinges, to open it?

151. ## Finance

Problem 1: You are considering hiring one of two portfolios managers who have actively managed funds last year. Both of the funds these managers have managed are “value” funds that try to enhance the returns relative to the standard value strategy by

152. ## Algebra

How do I create a quadratic equation that passes through the points (-1,2),(1,7),(4,5)?

153. ## chemistry

If a gram of water at sea level is heated from 37 degrees Celsius to 101 degrees. How much heat would be absorbed by the water?

154. ## chem

what are the strong acids and what is a good way to remember them what are the strong bases and what is a good way to remember them I think but am not sure: are the weak acids and bases everything else?

155. ## geometry

find how much air is in a beach ball if the inside radius of the ball is 7 inches used pi=7 over 22 and round to the nearest hundredth of an inch.

156. ## socials

the other poster is Careless talk brings tragedy in wartime i search google and it also come up message i think message is think before you speak because passing on message turn small thing to big thing images used to convey message soldiers, spy, train

157. ## speech

This might be a hard question to answer but I need an example for my speech for speech class. My speech is a persuasive on why you should foster an animal. I am talking about the benfits and how learning responsibility is a benefit. I know there are

158. ## chemistry

Balancing redox equations reactants: Cu, NO3

159. ## Chemistry

Explain the reaction mechanism of the following reaction by showing the types of bond splitting and atom rearrangements. C + O2 = CO2

160. ## Algebra 2

Dividing: Write the expression as a complex number in standard form 1) 2+5i/5+2i 2) 6-i√2/6+i√2 for the first one I solved it and I only got this far: 10+21i-10i^2/25-4i^2

161. ## chemistry

Explain the reaction mechanism of the following reaction by showing the types of bond splitting and atom rearrangements. C + O2 = CO2

197. ## Chemistry

how much sodium is in 1.80 grams of Na3PO4

198. ## Physics

If you pull a 10-kilogram cart along the ground for 5 meters using 2 Newtons of force,how high will it go before it stops?

199. ## Calculus

I need help finding the derivative of this function: f(x)=(X^2+2)^4/5 Thanks in advance! Any help would be greatly appreciated!

200. ## physics

A 450 kg spherical mass is placed 4.40 meters away from a 550 kg spherical mass. What is the magnitude of the gravitational field midway between the two? ...... Im not quite sure how to do this any help would be appreciated.

201. ## math

what is the concentration of a sugar solution that contains 8g sugar dissolved in 500 ml water? answer in the form of a ratio

202. ## science(Ms.Sue)

What term almost always describes top consumers? A)herbivores B)omnivores C)carnivores D)producers My answer is B am i right,if not please explain?

203. ## math

if cosθ=2/3 and tanθ

204. ## English

I checked the rephrase as you recommended to me. Thanjk you 1)Hamlet wonders whether it is better to bear the nasty things which luck throws his (our) way or to make a stand against his mass of troubles. 2) He can oppose his troubles either by committing

205. ## physics

The maximum speed of a 3.7-{\rm kg} mass attached to a spring is 0.66 m/s, and the maximum force exerted on the mass is 11 N. What is the amplitude of motion for this mass? What is the force constant of the spring? What is the frequency of this system?

206. ## Law

A retirement plan based on age in which an employer offers $10,000 as a base early retirement incentive for 55-year-olds,$8,000 for 56-year-olds, and so on, and nothing to persons age 60 or older. Does such a plan amount to illegal age discrimination? My

207. ## College Algebra

(ex)x·e4x + 4 = 1… so i need to solve for x…. how the hell do I do that???

208. ## College Algebra..LOG

log4(little four) (40 - 3x) = 0 now i need to solve for x...

209. ## College Algebra

so i am suppose to to find the max value attained by… g(x) = -3x2 - 24x - 18. but my teacher said "There is a difference between determining the maximum value and naming the location of the maximum value." what does that mean??

210. ## physics

I just need a around about answer if a 250 pund man is travling 8mph and hits his face into a stationary objest around how many pounds of pressure is he getting hit with think of it like getting punched in the face

211. ## Chemistry

Taking into account the "Second Law of thermodynaics", what is the maximum percentage of heat at 700 C that can be converted into electricity if the waste heat was produced as steam at 100 C?