# Questions Asked onNovember 20, 2011

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?

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

3. ## physics

A ball is projected horizontally from the edge of a table that is 1.15 m high, and it strikes the floor at a point 1.70 m from the base of the table. (a) What is the initial speed of the ball? m/s (b) How high is the ball above the floor when its velocity

4. ## chemistry

sulfur dioxide (g) + oxygen (g) sulfur trioxide (g) SO2 + O = SO3 Is this correct for the balanced equation?

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.15×10−23 kg . m/s and 5.19×10−23 kg . m/s, respectively. 1.)What is the magnitude of

6. ## Electrical Circuits

find the number of free electrons in a copper conductor having a diameter of 0.064 in. and a length of 1000ft.

7. ## algebra

The half-life of plutonium-234 is 9 hours. If 40 milligrams is present now, how much will be present in 4 days? (Round your answer to three decimal places.)

8. ## ALGEBRA

From a survey of 100 college students, a marketing research company found that 65 students owned iPhones, 40 owned cars, and 30 owned both cars and iPhones. (a) How many students owned either a car or an iPhone (but not both)?

9. ## Physics

In many locations, old abandoned stone quarries have become filled with water once excavating has been completed. While standing on a quarry wall, a boy tosses a piece of granite into the water below. If he throws the rock horizontally with a velocity of

29. ## Further mathematics

An exponential sequence of positive terms and a linear sequence have the same first term.the sum of their first terms is 3 the sum of their second terms is 3/2,and the sum of their third terms is 6.find their fifth terms.

30. ## physics

Draw a block and tackle system of pulleys with a velocity ratio of 5 is used to raise a mass of a 25kg through a vertical distance of 40cm at a steady rate.

31. ## Health

Which one of the following types of training involves 10 to 30 minutes of high-intensity exercise? A. Medium range B. Anaerobic C. Interval D. Long, steady distance i think its either b or a?

32. ## Chemistry

Larger amounts of methane, in the form CH4*6H20 is trapped at the bottom of the ceans in Clatharate compunds (formed when small molecules occupy the empty spaces in cage like structures). Calculate the mass of methane gas trapped with in one Kg of the

33. ## geometry

Point D is the incenter of triangle ABC. Write an expression for the length x in terms of the three side lengths AB, AC, and BC.

34. ## 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?

35. ## socials

I compare wartime propaganda posters. first one is - remember hong kong! i google search it and it come. message it give out i cant tell. it look like japanese soldier standing and little white girl below. i think maybe show innocence. images used to

36. ## chemistry

Am I headed in the right direction. Sn + MnO4- --> Sn2+ + Mn2+ Sn --> Sn2+ + 2e- 5e + 8H + MnO4- --> Mn2+ + 4H2O If Im right what is the whole number that Im multiplying by

37. ## 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

38. ## physics

A ball is projected horizontally from the edge of a table that is 1.15 m high, and it strikes the floor at a point 1.70 m from the base of the table. (a) What is the initial speed of the ball? m/s (b) How high is the ball above the floor when its velocity

39. ## fitness

VO2max is related to which one of the following choices? A. The efficiency of the body to secrete perspiration and take in lactic acid B. The efficiency of the body to take in oxygen and eliminate carbon dioxide C. The efficiency of the body to take in

81. ## calculus

find the rms value of the function i=15(1-e^-1/2t) from t=0 to t=4

82. ## 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.

83. ## chemistry

Consider the following reaction: C6H5CL+C2HOCL3=>C14H9CL5+H20 If 1142 g of C6H5CL is reacted with 485 g of C2HOCL3, what mass of C14H9CL5 would be formed?

84. ## 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

85. ## english

Hello! I am a senior student who lives in Paris, therefore English is my seocnd language. I need help to my examen oral. Tomorrow, I have to talk about: "Occupy Wall Street" movement (what's happening? analyzing the situation, is the movement important?

86. ## math

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

87. ## calculus

The top and bottom margins of a paster are each 6 cm and the side margins are each 4cm. If the area of printed material on the poster is fixed at 384cm^2, find the dimensinos of the poster with the smallest area. I would like to know if my work is correct.

88. ## Pre calculus

A window is made up of a circle embedded in a rectangle so that the diameter of the circle is a side of the rectangle. Find the demensions that will admit the most light if the perimeter ofthe window is 44 meters.

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. ## geometry

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

91. ## physics

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

92. ## chemistry

A 28.4 L sample of methane gas is heated from 35.0 C to 76.0 C. The initial pressure of the gas is 1.00 atm at 35.0 C. Assuming constant volume, what is the final pressure of the gas

93. ## socials

last poster is the : If they over-run canada your money'll be useless... it right here h t t p : //img341.imageshack . us/img341/3655/214417bhocwbbv . j p g message i don't know who this message pointing at but it look like they say don't give your money

94. ## Math problem

1.You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a$38,250 small business loan. These loans must be repaid in full within

95. ## 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

96. ## Chemistry

The space shuttle uses fuel cells( AFC's) to produce electricity . In these fuel cells,O2 reacts with water and electrons to produce OH- ioins travel to the other electrode where they react with H2 to release electrons and produce more water. Based on this

97. ## 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

98. ## 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

99. ## Biology 11

the genotype of the hybrids of two pure-breeding pea plants that each have white flowers and round seeds (both traits dominant) would be?

100. ## NJHS Application

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

101. ## science

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

102. ## chemistry

what mass of barium sulphate can be produced when 100.0 ml of a 0.100M solution of barium chloride is mixed with 100.0 ml of a 0.100M solution of Iron(lll) sulphate?

103. ## 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

104. ## physics

the occupants of a car traveling at 25.7 m/s become weightless for an instant when traveling over the top of a hill. Calculate the radius of curvature of hill

105. ## poetry

what is the theme for Robert Frost's poem "After Apple-Picking"? My long two-pointed ladder’s sticking through a tree Toward heaven still, And there’s a barrel that I didn’t fill Beside it, and there may be two or three Apples I didn’t pick upon

106. ## High School Chemistry

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

107. ## trigonometry

if cosθ=2/3 and tanθ

108. ## 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

109. ## 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?

110. ## material & structure laboratory

Is the measured normal consistency lies in the range for the Portland cements?

111. ## Algebra

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

112. ## 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

113. ## 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

114. ## 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

115. ## fsu

The individual amounts in the Accounts Receivable Debit column of a sales journal should be posted to the accounts receivable subsidiary ledger, and the column total should be posted to the Accounts Receivable account in the general ledger.is it true or

116. ## 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

117. ## 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

118. ## physics

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

119. ## 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

120. ## trigonometry

tanθ= -2sqrt10/3 and π/2

121. ## 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

122. ## 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.

123. ## chemistry

A 10.6 liter at 25 C and 3.21 atm inside pressure became 12.8 liters at 221 C after driving in summer. What is the pressure in the hot tire?

124. ## 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...

125. ## chemistry

what is oxidation state of NO2

126. ## chemistry

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

If rhys is late for his finite mathematics class, and the probability that he is on time is 3/4. however if he is on time, he is liable to be less concerned about punctuality for the next class and his probability being on time drops to 1/2. rhy is on time

129. ## The Calvin Cycle

How many molecules of CO2 will the calvin cycle consume in generating 2 molecules of fructose 6-phosphate? How many molecules of ATP will the calvin cycle consume in generating 2 molecules of fructose 6-phosphate? How many molecules of NADH will the calvin

130. ## D.E

A particle moves on the x-axis with an acceleration, 246msta. Find the position and velocity of the particle at 3t, if the particle is at origin and has a velocity of 10ms when 0t by using either the method of undetermined

131. ## statistics

Group the largest data set and find mean, median, mode, variance, standard deviation, 15-th, 45-th and 80-th percentiles of the grouped data. Then find the same sample statistics using the ungrouped data. Is there any difference? Comment.

132. ## calculus

Evaluate the integral of xe^2x(dx) A. (1/6)(x^2)(e^3x)+C B. (1/2)(xe^2x)-(1/2)(e^2x)+C C. (1/2)(xe^2x)-(1/4)(e^2x)+C D. (1/2)(x^2)-(1/8)(e^4x)+C

133. ## Chemistry

Why water is a weak electrolyte?

134. ## 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?

135. ## math

if cosθ=2/3 and tanθ

136. ## 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

137. ## 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?

138. ## Chemistry

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

139. ## Physics

The maximum speed of a 3.1-{\rm kg} mass attached to a spring is 0.70 m/s, and the maximum force exerted on the mass is 12 N. What is the amplitude of motion for this mass? Express your answer using two significant figures.

140. ## 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

141. ## To Sra

Thank You Sra!!! :) PARP stand for parents as reading partners it was a reading contest I join 3 contests this year reflections, battle of the books @ my school, and theis gift card contest. I working really hard :) i was chosen to be in ladies club we did

142. ## Chemistry

I just wanted to clarify that although Cody did respond to my question, we were still unable to determine the solution. I will post a link to the question in a minute. (i noticed you replied to the other posts a bit ago, but i hope im not being too abrupt.

143. ## physics

Calculate the tidal force experienced by Io. How does it compare to the tidal force experienced by the Moon due to the Earth? What would the Earth-Moon distance (i.e., distance between their centres) need to be in order for the Moon to experience similar

144. ## Calculus

If f(x) = x ln(1+x) estimate the value of ln (2.1) given that ln2 = 0.6931.

145. ## 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.

146. ## Geometry

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

147. ## 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?

148. ## 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

150. ## 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.

151. ## chemistry

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

152. ## history

where can i get facts about winchester cathedral

153. ## 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

154. ## math

given sinθ=-5/13 and π

155. ## 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?

156. ## 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.

157. ## History

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

158. ## chemistry

Balancing redox equations reactants: Cu, NO3

194. ## 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?

195. ## 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!

196. ## 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?

197. ## 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

198. ## Chemistry

how many moles of lead (II) sulfate will be produced when 500 grams of magnesium sulfate is allowedto react with lead (II) nitrate?

199. ## English

I urgently need you to revise these sentences, too. I made some variations, but I have to be sure that everything is OK. I don't know if sentence 1 can make sense. 1) Two philosophical positions, which remain unreconciled in Hamlet's monologue, are

200. ## English

Use a telescope to see into the sky

201. ## English

Here is the second part. Thank you very much. 1) If death,unlike sleep, is an end in itself, then it is desirable and therefore preferable to life's suffering. Once we have 2) As in sleep there is the possibility of dreaming, Hamlet wonders if there will

202. ## science

What type of environments do leopards need to live in?

203. ## Chemistry

how much sodium is in 1.80 grams of Na3PO4

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. ## College Algebra

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

206. ## 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??

207. ## College Algebra..LOG

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

208. ## geometry

find the values of the variables and the measures of the triangles:x+(x+2)+(6x+10)

209. ## Math problem

evaluate a+b/10 for a = 68 and b =12 a+b/10 =

210. ## Pre-Calculus

I'm having a had time with this problem. Could you please help with step by step resolution? e^-x / e^-1 + 3 dx Thank you..

211. ## socials

what happened after the cypress hill massacre?? The white invaders formed the Northwest Mounted Police ???? what else happened?