# Questions Asked onDecember 5, 2010

1. ## Gilgamesh

How Does Gilgamesh respond to the death of Enkidu? a) He flees the city of Uruk to seek immortality b) He builds up the city of Uruk with monuments and massive walls to honor Enkidu c) He blames the harlot lass for brining this pain and suffering on Enkidu

asked by Johnathan
2. ## physics

A gymnast of mass 63.0 {\rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch.Calculate the tension T in the rope if the gymnast climbs up the rope with an upward

asked by Anonymous
3. ## physics

how do you convert 3x10^-3 rad to 10 min of arce

asked by flame
4. ## math probabilty

Find the (theoretical) probability of the given event, assuming that the coins are distinguishable and fair, and that what is observed are the faces uppermost. Six coins are tossed; the result is at most one head.

asked by Liz
5. ## physics need help!

I really need help on this Q, don;t know what to do with multtiple complex forces: A jet plane is flying with a constant speed along a straight line, at an angle of 27.0° above the horizontal, as Figure 4.30a indicates. The plane has weight whose

asked by angela
6. ## PHYSICS

The space probe Deep Space I was launched on October 24, 1998. Its mass was 474 kg. The goal of the mission was to test a new kind of engine called an ion propulsion drive. This engine generated only a weak thrust, but it could do so over long periods of

asked by hy
7. ## Probability

f two indistinguishable dice are rolled, what is the probability of the event {(3, 3), (2, 3), (5, 3)}? 1 What is the corresponding event for a pair of distinguishable dice? 2 {(3, 3), (2, 3), (5, 3)} {(3, 3), (2, 3), (5, 3), (3, 5), (3, 2)} {(3, 3), (2,

asked by Liz
8. ## algebra

K*T=K*T How would I solve for T?

asked by Jake
9. ## Chemistry

describe how you would make a 2.5L of a .100M KCL solution from a 5.5M stock solution

asked by lily
10. ## algebra

If a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this. m - 2n = 16, 4m + 4 = 1

asked by Anita
11. ## math

Multiply and then simply by factoring (√2y)(√3)(√8y)

asked by beth
12. ## college Chemistry

Why was there condensation of the beaker of cold water when a blue flame was passes underneath? This experiment is from the Gas Burner experiment. A) the product of carbon dioxide from combustion (B) the product of hydrogen dioxide from combustion (C) left

asked by Ivy
13. ## math

Find 0.12 ÷12 calculation steps

asked by ovi
14. ## chemistry

Extraction of caffeine: You had extracted 2 g of crude caffeine and you were in a hurry. Instead of doing the 6 successive extractions with 2ml portions of methylene chloride, you only did 2 successive extractions with 6 ml portions of solvent. Now,

asked by Anonymous
15. ## chem

1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and

asked by Anonymous
16. ## math

If the coordinate of A on the real number line is -2, find the coordinate of B if AB= 5 units

asked by Sabra
17. ## math

A,B are two points on a given line L.L is the midpoint of the section AB. find the coordinate of point B if the coordinate of A=7 and the coordinate of L=4

asked by Sabra
18. ## math

A,B,C are points on the line L, the coordinate of B=-2, c is a point that divides AB in the ration 2:3.if the coordinate of C=4, find the coordinate of A

asked by Sabra
19. ## marketing

Use the University Library or the Electronic Reserve Readings to locate a peer-reviewed article that reports original research. Search "major databases (e.g. - ProQuest)" in the Online Collection, and use the key search words, "research studies in" to

asked by Rowena
20. ## science

can anyone give me examples of energy intercoversions please

asked by paul
21. ## science

can anyone give me 10 examples or energy interconversions and how they work please thankyou.

asked by paul
22. ## math

the perimeter of an equilateral triangle is 9cm.how long is each side?

asked by zainab
23. ## Physics

A bullet of mass 0.02kg is fired at a speed of 500m/s towards a fixed wooden block of thickness 10cm. The bullet penetrates the block and emerges with a speed of 200m/s. a) Find the average retarding force on the bullet when it is passing through the

asked by laura
24. ## chemistry

calculate the molarity of 18.0 ml of h2so4 in 2.0l of solution?

asked by diane
25. ## Psychology

Create an operational definition of self-confidence using peer reviewed articles as reference

asked by Linda
26. ## Physics

A block of mass 0.5 kg rests on a smooth inclined plane. It is then pushed by a horizontal force of 16N. When the block has displaced 5m along the inclined plane. What would be the speed of the block if the plane is rough and a friction of 5N is acting on

asked by Alex
27. ## Sci !!!ASAP!!!

How do people help plants ?

asked by Sumaiya
28. ## English

I need 30 sentences in the past

asked by zozo
29. ## physics

what happens to the gravitational energy of a firefighter when he slides down the firepoles?

asked by lester
30. ## Chemistry

Why is graphite such a good conductor of electricity? Why is diamond the hardest naturally occurring substance?

asked by Olivia
31. ## geometry

the vertices of ABC are A(1,1) B(7,3) and C(2,6) write and equation of the line that contains the median from c to ab

asked by lexus
32. ## chemistry

Predict the products of the chemical reaction aluminum + iron(III) oxide

asked by Pedro
33. ## chemistry

Predict the product: hydrogen peroxide (catalyzed by manganese dioxide)

asked by Nick
34. ## Math

If a grade was drawn at random from the data shown below, what is the probability that the grade is not a B? Grade Frequency A 2 B 8 C 11 D 2 F 1 I think it is 1 out of 5 or 4 but I am not sure? Please help :) Thank you much!

asked by Shannon
35. ## chemistry

Predict the the product for the following reactions. zinc + hydrochloric acid sulfuric acid + sodium hydroxide sodium + hydrogen acetic acid + coppper

asked by Amanda
36. ## chemistry

How many of grams of aluminum would be produced from the decomposition of 21.0 g of Al2O3

asked by Bright
37. ## comm155

Write a paragraph, using several sentences, to describe a recent interaction with a friend or family member about personal finance or credit cards. This interaction may be imagined or real. ·Use at least five different pronouns in your sentences.

asked by queen
38. ## Math

There are three distinct ways to add four positive odd numbers to obtain 10: 1 + 1 + 3 + 5 = 10 1 + 1 + 1 + 7 = 10 1 + 3 + 3 + 3 = 10 Here, distinct means that changing the order of the numbers on the left-hand side of an equation does not count as a new

asked by SkaterGirl
39. ## Math

There is a 4 by 4 grid of points. Each pair of horizontally adjacent or vertically adjacent points are separated by a distance of 1 unit. How many circles of radius 1 pass through exactly 2 of these grid points? Justify your response. (Note: the circles

asked by SkaterGirl
40. ## Math

Find, with justi cation, the smallest integer whose rst digit is 1 and which has the property that if this digit is transferred to the end of the number, then the number is tripled

asked by SkaterGirl
41. ## physics

a simple pendulum with the length of 2.08m oscillates. the acceleration of gravity is 9.8 m/s^2.how many complete oscillations does the pendulum make in 3.75 min?

asked by Harmonie

The price of a new flat panel television is $3500. What is the total price of the television that includes the 6% sales tax? asked by estrella 43. ## English Hello! Does anyone know how to insert pages in Word 2007? I want my fourth page to be numbered with 1. I have been searching for the way to do this for at least 2 years. I have never done it! I have checked all Web pages. Need someone who really knows how asked by tee 44. ## Chemistry For a molecule of fluorous acid, the atoms are arranged as HOFO. What is the formal charge on each of the atoms? Enter the formal charges in the same order as the atoms are listed. (I searched everything online to find the shape of HOFO but could not find asked by Rita 45. ## math-PLEASE HELP Convert to decimal notation. 8.23 * 10^7 asked by Michelle 46. ## chemistry How many grams of methane gas were used to fill a baloon to a volume of 3.0 L at STP? asked by Naples 47. ## College Chemistry How do you calculate the value for Delta U for a system that loses 50 J of heat and has 150 J of work performed on it by the surrondings? I need to know the formula to use and how to use it. Thank you! asked by Heather 48. ## math The price of a new flat panel television is$3500. What is the total price of the television that includes the 6% sales tax?

asked by estrella
49. ## 6th grade

who ordered the great sphinx to be built

asked by erick
50. ## math

Identify the proportion listed below that solves this problem. It will take 13 people to pick 112 watermelons in a day. How many people will it take to pick 200 watermelons in a day?

asked by estrella
51. ## Math

If P(B)=1/5 compute P(not B)? So I am thinking it may be P(not B)=0.2? Is this right?

asked by Shannon
52. ## Math

if the angle between the two lines 3x-5y-1=0 and Kx-y=3 is 45, then find the value of k

asked by Name
53. ## math

Convert to scientific notation: 0.000678

asked by estrella
54. ## english

can you answer this one into correct dangling modifier.Having wrapped up the package carefully it should be tied.

asked by josie
55. ## English

Hello. I need some help from a native speaker of English. 1)Is it possible to say "to make a (peace) treaty" or is it "to conclude a treaty"? 2)is it possible to say "to make a visit to Mexico"? 3)is it possible to say "bipartite relations (between the

asked by Ilma
56. ## Statistics

True or False In Regression Analysis if the variance of the error term is constant, we call it the Homoscedasticity property.

asked by Ben
57. ## Statistics

Use the following results obtained from a simple linear regression analysis with 12 observations.  ￼  =37.2895-(1.2024)X  R2=.6744 sb1=.2934  Test to determine if there is a significant negative relationship between the independent and dependent

asked by Sam
58. ## science

discuss the laws of electrostatic charges. for each of these laws, describe a lab activity you did which demonstrated the law

asked by Anonymous
59. ## com155

What role does eduction play in succesful financil planning? Me going back to school plays a major role in finacila planning

asked by darlene
60. ## com155

What role does eduction play in succesful financil planning? Me going back to school plays a major role in finacil planning. Is this correct in verb tense?

asked by darlene
61. ## Math

A)how do I find an inverse variaton equation that model: Length(in.) 4 6 8 9 10 Breaking weight(pennies)24 16 13 11 9 B)Explain how your equation shows that breaking weight decreases as length increases. Is this pattern reasonable for this situation?

asked by Taylah
62. ## ethics

What if the doctor really can't afford to treat someone who cannot pay? What if the cost of the care is too much to bear? What then?

asked by Anonymous
63. ## Chemistry

What is the solubility equilibrium for Mn3(PO4)2? Isn't it this.. Mn3(PO4)2 (s) --> 3Mn^+2 (aq) + 2PO4^-3 (aq) but i keep getting it wrong. suggestions?

asked by Savannah S.
64. ## chemistry

using the lewis dot structures, predict the formula for the compound formed between lithium and chlorine.

asked by becca
65. ## Chemistry

The volume of 02 collected over water at 25 degree C and 740 torr, was 250 mL. What volume will the dry 02 occupy at STP? (Vapor pressure of water at 25 degre C is 23.8 torr).

asked by dody
66. ## Science

How can i explain the life cycle of nylon?

asked by Laura
67. ## Chemistry

How many unpaired electrons are in the electron structure of 24 Cr, [Ar]4s1 3d5

asked by dody
68. ## Chemistry

Write equations for the following reactions: the combustion of propane the incomplete combustion of propane to for CO and water the complete combustion of 8,8-dimethylpropane in oxygen

asked by Amanda
69. ## physics

What force is necessary for a person to hold a 50 kg mass over their head?

asked by machaila
70. ## Chemistry

how many moles of oxygen are needed to react with 1.6 moles of isopropyl alcohol, CcH7OH Equation is 2 C3H7OH + 9 02 ->6 CO2 + * H2O

asked by dody
71. ## Chemistry

sorry How many moles of exygen are needed to react with 1.6 moles of isopropyl alcohol, C3H7OH Equation is 2 C3H7OH + 9 02 -> 6 CO2 + 8 H20

asked by dody
72. ## Chemistry

If .002 L of .650 M NaOH are added to 1.0 L of 0.9 M CaCl2 what is the value of the reaction quotient and will a precipitate form? I keep getting 0.0011 because I thought the answer was [Ca+][OH-] but that's not correct, I think I'm missing a final step

asked by Maddie
73. ## chemistry

2 Na2 + @H20 -> 4NaOH + 02 Whtes 200. g of Na202 were reacted, 32.0g of 02 were collected The yield of 02 colleced how many percentages?

asked by dody
74. ## Chemistry

What is the atomic mass of an element if one hatom has a mass of 2.107 x 10x10 to the -22 power g

asked by dody
75. ## Chemistry

how do I write the equation for How many grams of sodium nitrate are required to form 90.0 grams of water?

asked by dody
76. ## Chemistry

Wen 4Ag + 2H2S + 02 -> 2Ag2S + 2H20 and the reactants inclde 12 mol Ag, 6 mole of H2S and 96 G of 02 the limiting reactant is?

asked by dody
77. ## Chemistry

What volume will .00 L of Gas occupy if the temperature is changed form 30 degree C to 90 degree C (P is constant)

asked by dody
78. ## chemistry

what is the partial pressure of 02 collected over water at 25 degree C and 630 torr (vapor pressure of H20 at 25 degree C is 23.8 torr)

asked by dody
79. ## statistics

One example of hypothesis testing would be to conduct a testing on how many hours a week a typical truck driver might drive.

asked by Anonymous
80. ## physics

What force is necessary for a person to hold a 50 kg mass over their head?

asked by machaila
81. ## Chemistry

An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis?

asked by MoMto2
82. ## Chemistry

An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis?

asked by MoMto2
83. ## adv. alg.

list all roots of 1) x^5-3x^4+3x^3-x^2=0 2)8x^3-12x^2+6x-1 3) x^4=16

asked by Kaleb
84. ## Precalculus

Evaluate all six trigonometric functions at t, where the given point lies on the terminal side of an angle of t radians in standard position. (40/41, -9/41)

asked by Anonymous
85. ## college

can someone please give me an example of a situation in which personal or religious beliefs might conflict with something that may be asked of you professionally? What should you do in this situation?

asked by Anonymous
86. ## ethics

What are some examples of cultural differences around the world that can affect business practices? Should a business change practices based on cultural sensitivities? Why or why not?

asked by Anonymous
87. ## chemistry

What volume of 0.115M NaOH is required to reach the equivalence point in the titration of 25.00 mL of 0.200M of HF? Ka(HF)=7.4 x 10^-4

asked by csb
88. ## physics HELP

A jet plane is flying with a constant speed along a straight line, at an angle of 27.0° above the horizontal, as Figure 4.30a indicates. The plane has weight whose magnitude is 86500 N, and its engines provide a forward thrust of 103000 N. In addition,

asked by angela
89. ## accounting

Calculate the rate of depreciation for the asset with the help of given data.? Cost of the asset Rs1,20,000 Residual value Rs40,000 Expected life 5 years

asked by pinki
90. ## chemistry

3 CH3NH2 + 11 HNO3 ---> 3 CO2 + 13 H2O + 14 NO RATE OF DISAPPEARANCE OF NITRIC ACID IS 20M/min. what is the rate of reaction? at what rate is the concentration of carbon dioxide changing?

asked by candace
91. ## chem 2

What concentration of NaF is required in order to convert a 0.15M HF solution to a buffer with a pH of 5.50?

asked by emily
92. ## physics

An original stationary car with a mass of 1500 kg reaches a velocity of 15 m/s/s after starting. what is the car's acceleration?

asked by Anonymous
93. ## Computer Science

Write an Assembly program that reads in a number of cents. The program will write out the number of dollars and cents separately.

asked by Anonymous
94. ## Gen. Chemistry

What is the original molarity of a solution of weak acid whose Ka= 3.5 x 10^ -5 and pH is 5.20... I'm lost, please help!

asked by Savannah S.
95. ## physics

what equation would you use if you wanted to find the net x-direction force on the box example: here is the problem... A box of mass 24.0 kg is subject to an applied force of 245 N with a depression angle of 31.2°, and it accelerates to the right. The

asked by andrew
96. ## Precalculus

State whether or not the equation is an identity. Prove your statement. sin(x)/cos(x)+ cos(x)/1+sin(x)

asked by Anonymous
97. ## Physics

A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance of 5.00 cm from its unstretched position when the system is in equilibrium. If the spring constant is 54.1 N/m, determine the mass of the object.

asked by Anonymous
98. ## Physics

A object-spring system oscillates with an amplitude of 4.0 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, determine each of the following values. (a) the mechanical energy of the system J (b) the maximum speed of the object m/s (c)

asked by Josh
99. ## Precalculus

State whether or not the equation is an identity. Prove your statement. sin(x)/cos(x)+ cos(x)/1+sin(x)=sec(x) (sorry about that)

asked by Anonymous
100. ## physik

was kÃ¶nnte passieren,wenn man aluminiumstÃ¤be in eine betonmauer einarbeiten wÃ¼rde?

asked by michelle
101. ## religious study

What is “the problem of evil,” and why is it particularly problematic for Western, monotheistic religious traditions? I am able to address "the problem of evil"; however, I do not know the second part of the question; can someone kind enough to give me

asked by Nathan
102. ## English

Thank you very much for your corrections. Here are some more sentences for you to check. 1)The mirror claims to have no preconception since it projects whatever it sees umisted by love or dislike.It reflects a woman who is becoming (growing, getting old).

asked by Franco
103. ## stat

7. A researcher selects a random sample. A 90% confidence interval for a population mean  A) is an interval with margin of error ± 90%. B) has the property that if we repeatedly selected our random sample in exactly the same way, each time constructing

asked by Anonymous
104. ## physics

A hotdog vendor named Sam is walking from the southwest corner of Central park to the Empire State Building. He starts at the intersection of 59th Street and Eighth Avenue, walks 3 blocks east to 59th Street and Fifth Avenue, and then 25 blocks south to

asked by milly
105. ## physics

A treasure map you uncovered while vacationing on the Spanish Coast reads as follows: "If me treasure ye wants, me hoard ye'll have, just follow thee directions these. Step to the south from Brisbain's Mouth, 6 paces through the trees. Then to the west, 10

asked by julianna
106. ## physics

The volume of the Earth's oceans is approximately 1.4×1018 m3. The Earth's radius is 6.4×106 m. What percentage of the Earth, by volume, is ocean?

asked by julianna
107. ## physics

Density is calculated by dividing the mass of an object by its volume. The Sun has a mass of 1.99×1030 kg and a radius of 6.96×108 m. What is the average density of the Sun?

asked by amber gorman
108. ## Operation management

1. Based on your reading and research explain whether or not you believe ERP and MRP are the only resource planning processes applicable to manufactured processes? 2. Can either ERP or MRP be used for service industries or can they only be used for

asked by daniel
109. ## physics

A Boston cab driver picks up a passenger at Fenway Park, drops her off at the Fleet Center. Represent this displacement with the vector D. What is the displacement vector from the Fleet Center to Fenway Park? a)D b)2D c)0 d)-D aka: D=vector d in the

asked by stephanie m.
110. ## science

a young girl with a mass of 46 kg is hanging motionless from a tree branch. what is the net force on the girl

asked by grayson
111. ## CJS 210

What are the ethical standards in policing? I'm not exactly understanding what they mean by this

asked by Donald
112. ## physics

An aircraft carrier sails northeast at a speed of 6.0 knots. Its velocity vector is v. What direction and speed would a ship with velocity vector –v have? speed should be in knots and direction should be one of the following: northwest,

asked by emily li
113. ## accounting

What benefits do you see for the U.S. economy in tax-sparing credits? Should it be expanded or reduced? Why or why not? The North American Free Trade Agreement (NAFTA) has tax consequences. Discuss the costs and benefits as you see them for the U.S. from

asked by daniel
114. ## Biology

If a heterozygote is crossed with a recessive individual, what % of their offspring will be recessive (have light hair)?

asked by June
115. ## communication

Many businesses now have a Twitter account, MySpace account, or another social media tool they use to attract and maintain business. What value do social media offer for professional use? How has your commercial behavior been affected by social media

asked by shelly
116. ## Physics

A spring stretches 4.3 cm when a 13 g object is hung from it. The object is replaced with a block of mass 22 g that oscillates in simple harmonic motion, calculate the period of motion.

asked by Lynette
117. ## Physics

A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 28.0 s. (a) How tall is the tower? m (b) If this pendulum is taken to the Moon, where the free-fall

asked by Lynette
118. ## physics

Three masses are arranged on a flat surface as shown. Two of the masses are as follows: m2 = 16.3 kg and m3 = 66.5 kg. A horizontal force of 519 N applied to m2 accelerates the masses across the floor, which has a coefficient of friction of μ = 0.312, at

asked by dillon
119. ## Composition

I would like to get a second opinion if I am correct. I had to write five sentences about the role of education in successful financial planning, in which I correctly use a different verb tense in each sentence. Here is what I wrote. Our education plays

asked by Jim
120. ## Precalculus

1.Write the expression as a sum or difference. cos(5x)cos(-4x) 2.Write the expression as a product. cos(4x)-cos(12x)

asked by Lynette
121. ## Exponents

GRE question - What is greater z or 60? z is the degrees of a one of the congruent sidesAn isoceles triangle

asked by Lisa
122. ## physics

Does the multiplication of a scalar and a vector display the commutative property? This property states that the order of multiplication does not matter. So for example, if the multiplication of a scalar s and a vector r is commutative, then sr = rs for

asked by jay
123. ## Math

A rectangular flowerpot is 20 inches long 8 inches wide and 6 inches high. true or false if andy fills the flowerpot 2/3 fullof potting soil the expression 2/3(20 + 8 + 6) could be used to find the amount of potting soil he needed

asked by Lisa
124. ## Math

Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__

asked by Lisa
125. ## Science

What is a 3 dimensional ecosystem? What is a 2 dimensional ecosystem?

asked by Joe
126. ## Physics

omar throws a rock down with speed 12 m s from the top of a tower. The rock hits the ground after 2.0 s. What is the height of the tower?

asked by Jesse
127. ## Physics

An automobile tire has a volume of 0.0185 m3. If the pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire?

asked by Matt
128. ## self-reflection essay

am writeing self-relection essay abt the theme self perceiving society,society perceiving self and i don't know how to start it off?

asked by mercy
129. ## Physics

A vertical cylindrical cylinder, closed at the bottom end, contains 0.0100 moles of gas. It is fitted at the top with a piston, which can move freely. The mass of the piston is 14.0 kg and the initial height of the piston above the bottom of the cylinder

asked by Matt
130. ## french

what does Elle travaille dans un hotel mean in english?

asked by sufain

asked by Ana
132. ## Math

Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__

asked by Lisa
133. ## self-reflection essay

am writeing self-relection essay abt the theme self perceiving society,society perceiving self, i dontknow how to start my outline to starte the thesis

asked by mercy
134. ## Precalculus

State whether or not the equation is an identity. Prove your statement. sin(x)/cos(x)+ cos(x)/1+sin(x)=sec(x)

asked by Anonymous
135. ## physics

what equation would i use if i wanted to find the magnitude for this problem A box of mass 32.0 kg is subject to an applied force (FA) with an elevation angle of 39.9°, and it accelerates to the right at 6.31 m/s2. The horizontal surface has a coefficient

asked by Jessica
136. ## algebra

solve 1-5= -4m^sq

asked by jame
137. ## chemistry

lithium + gold(III) chloride +lithium chloride + gold need to balance equation

asked by jin
138. ## self-reflection essay

what is self perceiving society mean

asked by mercy
139. ## English

I forgot to include the following statements. Thank you. 1) You are fast like a lighning. Better: You are as fast as lightning. 2)Is it possible to write: "I didn't correct this paragraph because it was your first draft. You re-wrote it neatly (?) on your

asked by Franco
140. ## Science

If India had a population of 1.05 billion in 2002 with a steady growth rate of .9%, when would its population reach 4.2 billion?

asked by Anne
141. ## physics

okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59.

asked by Matt
142. ## physics

okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59.

asked by Matt
143. ## Math

johnny is directly in front of dougie, who is playing goalie as shown. johnny is 2.8m from both goal posts. he is also three times as far from dougie as dougie is from either post. he is also three times as far from dougie as dougie is from either post.

asked by Sarah
144. ## Transitional Math

Richard took a loan of $10000 at a rate of 5%. If he paid$2500 in interest, how long did it take him to pay off the loan?

asked by Troy
145. ## composition

I made a correction in my previous paragraph. I want to make sure I identified the verb tenses correctly. Thank you in advance for your thoughts. Our education plays (simple present tense) a significant role in our future financial planning. I have taken

asked by Jim
146. ## Physics

Need help with part b... I got a to be k = 94.985 N/m I can't figure out how to go about doing part b.. A platform of mass 0.79 kg is supported on four springs (only two springs are shown in the picture, but there are four altogether). A chunk of modeling

asked by Anonymous
147. ## Algebra uno help please :)

Write an equation of the line that passes through the given point and is parrel to the given line. 1. (-1,3) Y=2x+2 I'm thinking that you just plug in -1 and 3 for x and y. So, 3=2(-1)+2 Correct? Please help me. :) Thank you -Allyson

asked by Allyson
148. ## chem

Extraction of caffeine: You had extracted 2 g of crude caffeine and you were in a hurry. Instead of doing the 6 successive extractions with 2ml portions of methylene chloride, you only did 2 successive extractions with 6 ml portions of solvent. Now,

asked by Anonymous
149. ## huckleberry finn

in the book huckleberry finn manys words are used that mean something like "to beat someone" for example to lick. i need to find 8 more of words that are used to mean "to beat" if you know any and the page number/chapter it is used in the book that would

asked by hannah
150. ## chemistry

1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and

asked by Anonymous
151. ## Physics

When a drag strip vehicle reaches a velocity of 60 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight line path is a constant -7.5 m/s2. What

asked by Jesse
152. ## writing

i really need help of this writing assigment. i have been working on it for hours now and my brain is just jammed. okay .. the assigment is to Write an eight sentence paragraph that fully develops the topic of how drunk driving can be stoped. this is what

asked by Cas
153. ## Chemistry

How many moles of NaOH must be added to 1.0 L of 1.4 M HC2H3O2 to produce a solution buffered at each pH? (a) pH = pKa mol (b) pH = 3.07 mol (c) pH = 5.15 mol

asked by justin
154. ## Chemistry

What volumes of 0.46 M HNO2 and 0.54 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.40? a) HNO2 b) NaNO2 answer in L

asked by justin
155. ## physics

hummingbird beats wings with frequency of 80.0 Hz. What is period of bird's flaps? I know T = 1/f , but what is the label/units for the answer?

asked by anonymous
156. ## geometry

the area of a triangle is 147 square inches and its height is 1.5 times its base. find the base and the height of the trianle.

asked by michelle
157. ## writing

What does "seek to Serve" mean?

asked by kathy
158. ## 11th grade

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.17 x 10^6 m/s. find the central force acting on the electron as it revolves in a circular orbit of radius 5.42 x 10^-11m.

asked by Julia
159. ## Algebra one help, please.

Determine which lines, if any, are parrell or perpindicular linea= y=4x line B= y=-1/4x line c= y= 4x-1 I think line B and A are parrell. Am I correct? Please help me, thank you.

asked by Allyson
160. ## physics

A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 6.2 m higher than A, with speed v/2. Calculate the maximum height reached by the stone above point B.

asked by anna
161. ## physics

x=12cm and y=14cm, what is 0

asked by anonymus2
162. ## Physics

A 500 g block is released from rest and slides down a frictionless track that begins h = 1.70 m above the horizontal, as shown in Figure P13.56. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring

asked by Anonymous
163. ## Physics

A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 50.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a

asked by Josh
164. ## Physics

I need help with part b... I found in part a that delta L is .29568m and I think I might be doing something wrong with the units because I can't get the right answer. A 156 g hockey puck is attached to a rubber band and rotated with an angular speed of

asked by Anonymous
165. ## Physics

The free-fall acceleration on Mars is 3.7 m/s2. (a) What length pendulum has a period of 4 s on the earth? cm What length pendulum would have a 4 s period on Mars? cm (b) A mass is suspended from a spring with force constant 10 N/m. Find the mass suspended

asked by Albert
166. ## Physics

A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 28.0 s. (a) How tall is the tower? m (b) If this pendulum is taken to the Moon, where the free-fall

asked by Albert

asked by Ana
168. ## physics

A source of sound (1200 Hz) emits uniformly in all directions. An observer 2.99 m from the source measures a sound level of 41.1 dB. Calculate the average power output of the source.

asked by Matt
169. ## science

a fan uses 150j of mechanical energy, 20j of heat and 75j of sound energy a) what is the total input energy b) what is the total useful output energy c)what is the total wasted energy d) what is the energy efficiency e) what percent of the energy was

asked by Anonymous
170. ## Physics

A 45 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 1.3 * sin( 0.6 * t ) where y is measured in meters and t in seconds. (a) What is the spring constant in N/m? k = N/m .016 NO HELP: You are

asked by sarah
171. ## physics

A wheel is roatating freely at an angular speed of 800 rev/min on a shaft of negligible moment of inertia. A second wheel initially at rest and with twice the moment of inertia of the first, is suddenly coupled to the same shaft. (a) what is the angular

asked by Ama
172. ## physics

A steel ball bearing the radius 1 cm is rolling along a table with speed 20 cm/sec when it starts to roll up an incline. How high above the table level will it rise before stopping? Ignore friction losses.

asked by Ama
173. ## physics

A solid sphere of radius 3 cm and mass of 100 g rolls down a 30 degree incline from a height of 1 m. A hoop of the same mass and radius rolls down the same incline from the same height. What is the linear velocity of each body at the bottom of the incline?

asked by Ama
174. ## Math

Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__

asked by Ana

how to use specialized journals, general ledger, and subsidiary ledger sheets to ... business owner purchased $200 product on account to be resold...what does that correctly look like, please? asked by Barb 176. ## physics A phonograph record of radius 6 cm and mass 15 g is rotating with an angular velocity of 33.33 rev/min. A Penny of mass 1 g suddenly falls on the record and lands at the radial distance of 4 cm from the record’s center. What is the angular velocity after asked by Ama 177. ## Math Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__ asked by Ana 178. ## Physics An arrow is shot from a bow at 42 m/s at 70 degrees what is the horizontal and vertical components asked by Ally 179. ## Accounting Specialized Journals what does customer pays$150.00 toward account at store. What does that look like using specialized journals, general ledger and subsidiary ledgers please

asked by Barb
180. ## 11th grade

Consider two vectors where F1 = 38 N, F2 = 58 N, and = 240o and = 25o, measured from the positive x-axis with counter-clockwise being positive. What is the magnitude of the equilibriant?

asked by ray
181. ## Calculus

Find the interval(s) where the function is increasing where and it is decreasing. f(x)=sin(x+(pi/2)) for 0≤x≤2pi so my derivative is f'(x)=cos(x+(pi/2))? and my critical number is -pi/2?

asked by sh
182. ## English-No Country For Old Men

I have an essay to write but I need some help on this question. "Comment on both Sheriff Bell's and Moss's wives. How are they alike? What is your opinion of them? What do you learn about each woman's relationship with their husband because they are placed

asked by Jill
183. ## Accounting Specialized Journals

Store owner makes a $80.00 purchase, goods for resale, and uses check$143. Using Specialized journals, general ledger and subsidiary account, what is the correct posting please.

asked by Barb
184. ## Finance

Calculate die after-tax cost of debt under each of the following conditions: a. Interest rate of 13%, tax rate of 0% b. Interest rate of 13%, tax rate of 20% c. Interest rate of 13%, tax rate of 35%

asked by Anonymo

In store credit customer makes purchase on account for $50.00, invoice #18. What do the enteries look like using specialized journals, general ledger and subsidiary ledger sheets please? asked by Barb 186. ## Chemistry Use average bond energies to calculate delta Hrxn for C(s)+2H2O(g)-->2H2(g)+CO2(g) asked by Kate 187. ## English This is the number of years that someone has lived , or that something has existed. (What is the part of speech of 'that'? Is 'that' a relative adverb or a relative pronoun? What is the antecedent of 'that'?) asked by rfvv 188. ## English 1. Is Sandy a male name or a female name? 2. Is Jeremy a male name or a female name? asked by rfvv 189. ## elementary If P(B)=1/5, compute P(not B) Please Help?? asked by Shan 190. ## Physics A doctor uses an insulated backpack to “hike in” vaccines to a rural village in Papua New Guinea that is too remote for vehicular traffic. The vaccines are kept cold by packing them in 10 kg of ice. If the backpack absorbs heat (leaks cold) at a rate asked by Jimbo 191. ## Commercial Law What are the main requirements for a valid contract? And what is the difference between an offer and an invitation to treat and why is the difference important? asked by MaSa 192. ## algebra 1.)Find the equation of the circle with center (1, 3) and radius r =2. 2.)Find the area of the circle of the above problem? asked by Shan 193. ## statistics Im am so lost.... A bank conducts a survey in which it randomly samples 400 of it customers. The survey asks the customers which way they use the bank the most, (1) interacting with teller, (2)atm use, (3) internet bank service. It was also asked their asked by Kelly 194. ## calculus If f(x)=8x +2 find the exact area under the curve from x=0 to x=2. asked by Anonymous 195. ## English 1. Andy has lived for 40 years. 2. The animal has existed for 7 years. (Are the sentences grammatical?) asked by rfvv 196. ## English Hello again. Thanks for help. Could you please help me with one more sentence: British troops will withdraw from (leave)the country by 2011 OR will have withdrawn (will have left)? Maybe, both? Thank you very much. asked by Ilma 197. ## world history How did movable type help the Chinese to record their knowledge in a permanent form? asked by Alexis 198. ## geometry in a diagram of a scalene triangle ABC, line DE is the midpoint of line AB and line AC and DE=7 find the length of line BC asked by melinda 199. ## Physics An Olympic swimming pool is heated and maintained at 30 °C in the winter. It has a volume of 2500 m3, a length of 50 m, and a width of 25 m. During a storm, the pool receives 1 cm of rain over its surface area. If the rain is 15 °C, what will the asked by Jimmy 200. ## History What were the three major cities in the Islamic world? How did each develop and grow to become important? asked by Hi 201. ## Physics 1. Harry accidentally falls out of a helicopter that is traveling horizontally at 100 m/s. He plunges into the ocean below him 2.2 seconds later. How high above the ocean was the helicopter when Harry fell out? Hiw far did Harry travel horizontally while asked by Anonymous 202. ## chemistry How many grams of Urea would you have to dissolve in 500ml of H2O in order for the mass percent of H2O to be 88.8%? What is the mole fraction of Urea? What are the new boiling and freezing points? asked by regina 203. ## chemistry Dissolve 1.5g of an unknown salt into 37g of water and find that the new vapor pressure at 75C is 277 torr. What is the Molar Mass of the unknown? How many grams of the unknown would have to be used in 100ml of water to make a 11.5% solution by mass of the asked by regina 204. ## U.S. History Where was the greatest single American loss in the war? Charleston ? asked by Taylor 205. ## language okay i read the book Royally Jacked for english and i had to return the book and i need to finsh my book report ASAP ! i need to know 20 vocab words used in the book , venn diagram , plot diagram , summary 3-10 ! and i cant FAIL . so can you please help me asked by taylor 206. ## chemistry How many grams of Urea(CH4N2O) have to be dissolved into 253g of Chloroform in order for the boiling point to increase by 3.1C? asked by regina 207. ## History People of three religions worked and studied together in Cordoba, Spain. What were those three religions? What achievements came from this region of the Muslim world? Why might this time period be termed a “golden age of cooperation”? asked by Hi 208. ## World History The religion based on the teachings of Siddhartha Gautama is known as? asked by Alexis 209. ## algebra K*T=K*T I need help solving for T. How would I do it? asked by Jake 210. ## History Where were Muslim trade routes established? What products and inventions traveled along these routes? How did Muslim scholars preserve and pass on knowledge to medieval Europe? asked by Hi 211. ## Geometry Point H is the midpoint I'd line segment GJ Line segment GH is 7x-5 HJ is 4x+1 what is the value of X? asked by Katie 212. ## History Name the contributions that Islamic civilization made in the following areas: architecture, philosophy, science and technology, geography and navigation, medicine, bookmaking and literature, art and music, and recreation. asked by Hi 213. ## World History Buddhism asked by Alexis 214. ## chemistry If you wanted to have a solution of benzene that would freeze at 0 degrees Celsius with NaCl, what would be the mole fraction of NaCl that you would need? asked by regina 215. ## Physics Two thin rectangular sheets (0.29 m 0.40 m) are identical. In the first sheet the axis of rotation lies along the 0.29-m side, and in the second it lies along the 0.40-m side. The same torque is applied to each sheet. The first sheet, starting from rest, asked by Brandon 216. ## physics A 45 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 1.3 * sin( 0.6 * t ) where y is measured in meters and t in seconds. (a) What is the spring constant in N/m? k = N/m .162 NO HELP: You are asked by sarah 217. ## English This is the number of years that someone has lived , or that something has existed. (What is the part of speech of 'that'? Is 'that' a relative adverb or a relative pronoun? What is the antecedent of 'that'?) English - Writeacher, Sunday, December 5, 2010 asked by rfvv 218. ## Physics - check this work for horizontal displacem A 1.5kg melon is placed on top of the post. A girl lying on the ground fires a 500g arrow at ground level with velocity of 20m/s, 60deg above the horizontal, and hits the melon when the arrow is at its highest point. The melon, with the arrow embedded, asked by Farah 219. ## chemistry Given the compounds H2S, NH3, and SO2. Determine the order o boiling points. Rank them from highest to lowest boiling point. Give an explanation for your ranking by the electronegativity data a by type of intermolecular force. asked by regina 220. ## physics A box slides down a 33° ramp with an acceleration of 1.38 m/s2. Determine the coefficient of kinetic friction between the box and the ramp. asked by Kevin 221. ## algebra Steve ran a distanse of 150 meters in 1 1/2 minutes. What is his meter per hour ? asked by Anonymous 222. ## 10th grade if AB=3x-2 and BC=x+6, what is x? asked by Ian 223. ## Math What is the number of vertices of a triangular pyramid? asked by Ana 224. ## English Hi for my english class, we have to make an invention using cheap material that is useful, original, and provides a solution to a problem. We actually have to show the class like a prototype of it and I have no idea what to do! Mines on tuesday and I'm so asked by John 225. ## chemistry water has a vapor pressure of 23.76 torr at 25C if 1.15 g H2O is enclosed in a 1.0 L container will any liquid be present if so what is the mass of the water? asked by Anonymous 226. ## 6th grade a bicycle wheel must make 13 revolutions to roll 25 meters. How many revolutions must the wheel make to travel 1 km? Hint: 1000 m = 1 km asked by Serrena 227. ## physics A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard asked by Corey 228. ## physics A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard asked by Corey 229. ## physics A 4.8 kg block is pushed along the ceiling with a constant applied force of 87 N that acts at an angle of 55.0° with the horizontal, as in Figure 4-33. The block accelerates to the right at 6.00 m/s2. Determine the coefficient of kinetic friction between asked by Corey 230. ## Math2 if arc AC=140 degrees, what is angle ABC? if angle ABC=28 degrees, what is arc AC? asked by Ian 231. ## physics A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.57, how long does it take to move the box 9 m, starting from rest? (If the box asked by Corey 232. ## physics A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.75, how long does it take to move the box 7 m, starting from rest? (If the box asked by Corey 233. ## statistics A production process is considered to be out of control if the produced parts have lengths with a standard deviation greater than .5 mm. A sample of 41 parts yields a sample standard deviation of .58 mm. At the .05 significance level, does this sample asked by Mallory 234. ## algebra 1 use multiplying by 1 to find an expression equivalent to 11/14 with a denomenator of 56c the equivalent expression is----- asked by robbie 235. ## 7th gd. pre-algebra What is the circumference of a 78.75 cookie using pi= 3.14? asked by Tamia 236. ## Chemistry A student draws four resonance structures for nitromethane (CH3NO2). How many lewis structures should have been drawn to represent nitromethane? asked by Amy 237. ## Pre -calculus An observer 2 km from the launching pad observes a vertically ascending missile at an angle of elevation of 21 degrees. 5 seconds later the nagle has increased to 35 degrees. What was its average speed during this interval? If it keeps going vertically at asked by H 238. ## Chemistry Since BrF3 and ClF5 do not obey the octet rule. Did IF7 obey the octet rule? Yes or No? asked by Sarah 239. ## english Please check the meaning: "Like a cat in a corn crib, the girl pup sneaked in from behind and sank her needlesharp teeth in the coon's back." Just the "like a cat in a corn crib" part. Thanks! asked by Anonymous 240. ## Science I have a paper due where I have to develop a healthy eating plan. I have the paper almost completed but I need a little help in one area. how your plan may be adjusted to fit your changing nutritional needs as a result of age or changes in physical asked by Anonymous 241. ## math At a Amusement PArk you can buy tickets for 12 rides for$15. At that rate, how many tickets would you be able to buy for $22.50? asked by Serrena 242. ## 12th grade I need help in Psychology do you guys do that? Or just ore subjects? asked by Miranda 243. ## English What does the simile "Like a cat in a corn crib" mean? asked by Anonymous 244. ## algebra the population P(t) of a new residential development t years after 2010 is P(t)=8000(1-e^-0.3). What is the population for 2015? asked by math help 245. ## physics A 726 kg car travels from Boone to Blowing Rock along US321. How much working is needed to keep the car traveling at a constant speed of 21.8 m/s around a curve of radius 28.4 m? asked by KC 246. ## math If tanx=5/12 then what is sinx/2? asked by Jon 247. ## Language Arts I have to write a research paper for L.A. and it must be comepletely in 3rd Person. I have all the research information and how i am organizing the paper but i can't seem to figure out how to start it off. How can i write a good introduction? asked by Anonymous 248. ## algebra convert to a logarithmic equation:8^y=4096 Please show work. asked by math help 249. ## Chemistry What is geometry of Ammonia? 1)trigonal planar 2)square planar 3)T-squared 4)trigonal pyramidal 5)tetrahedral What is the bond angle of Ammonia? 1)109.5 2)less than 90 3)less than 109.5 4)90 5)120 asked by Amy 250. ## physics Figure 6-43 shows a "conical pendulum", in which the bob (the small object at the lower end of the cord) moves in a horizontal circle at constant speed. (The cord sweeps out a cone as the bob rotates.) The bob has a mass of 0.060 kg, the string has length asked by :) 251. ## Business How to develop documentation for Small Business professionals to manage a specific employment position that would assist professionals to choose, train, an develop successful employees toward helping the company meet its goals? asked by Jessica 252. ## algebra solve {5-8x}>11 and write interval notation for the solution set. asked by math help 253. ## algebra A*B=A*B Solve for B asked by Bob 254. ## math In a Primary election,64 out of 100 registered voters actually vote. There are 750 registered voters in one precinct. how many people in the precinct voted? asked by Someone 255. ## Chemistry What is the geometry of XeF4? 1)tetrahedral 2)square planar 3)octahedral 4)seesaw 5)bent asked by Sarah 256. ## character traits please name some character traits for a boy that believes in his pups, and waits to see what they do. He also is a little pushy. asked by &lt;3 257. ## AP Physics I have two problems i don't understand if you could solve and show me what you did I would appreciate it :) 1.A 62.0-kg person, running horizontally with a velocity of +3.54 m/s, jumps onto a 13.4-kg sled that is initially at rest. (a) Ignoring the effects asked by Deanna 258. ## Pre Calc Determine how many orders of magnitude the quantities differ. A canary weighing 20 g and a hen weighing 2 kg. I want to say 1 but I am not sure... asked by Courtney 259. ## Chemistry What is the electron domain for: a)CH3I b)ClF3 c)H2S d)SO3 e)SO4^-2 asked by Sarah 260. ## Physics A 0.2 kg hockey puck is placed against a spring lying on a horizontal frictionless surface. The spring is compressed 0.2 m, with the hockey puck, and then released. The hockey puck when released is able to go up a frictionless slope with an angle of 30 asked by Amy 261. ## algebra II if f(x)=1*1 graph and write the rule for g(x) if g(f) represents f (x) shifted right 3 places and up 2 places asked by Anonymous 262. ## reading What was the main problem in the book Mrs. Mack. asked by osi 263. ## physics - speed of electron in magnetic field A beam of electron is accelerated by a potential difference of 2.5okV. The electrons are then allowed to pass into a magnetic field of strength 10.0mT. As the electrons enter the field, the direction of the velocity is at right angles to the direction of asked by Farah 264. ## Chemistry From the lewis structure of AlCl4- where should I place the formal charge? next to Al or Cl? asked by Sarah 265. ## accounting Howell Corporation purchased$350,000 of its bonds on June 30, 2010, at 102 and immediately retired them The carrying value of the bonds on the retirement date was $339,500. The bonds pay semiannual interest and the interest payment due on June 30, 2010, asked by Mayumi 266. ## Math A public opinion poll found that 5 out of 8 people in a community wanted a exercise course. if there are 10,000 people in a community, how many do NOT want a exercise course? asked by Sara 267. ## word meaning what does the word "implied" mean in this sentence?: "What was implied after Billy's mother found him using her scissors?" asked by Thanks to all Jiskha Teachers 268. ## English help Could somebody please link me to a good working power point program? Since my powerpoint trial ran out and I have a project that's due tomorow? Thank you, it's for my english project. :) asked by Allyson 269. ## algebra (a-b)(a^2+ab+b^2) asked by mike 270. ## physics A rocket moves upward, starting from rest with an acceleration of 28.8 m/s2 for 4.13 s. It runs out of fuel at the end of the 4.13 s but does not stop. How high does it rise above the ground? asked by Anonymous 271. ## English In the book Adventures of HuckleBerry Finn, what is the importance of the quote, "Now I say it ain't a-goin' to be more'n two hours befo' this wrack breaks up and washes off down the river. See? He'll be drownded, and won't have nobody to blame for it but asked by PLEASE HELP 272. ## Math a 52g. weight tied to a spring stretches the spring 1.3cm. How many grams would it take to stretch the spring 3cm? asked by Sara 273. ## English Thank you very much for your corrections. I still have a few questions on my previous post. 1. I'm as fast as a lightning. I'm fast like lightning. I'm fast like a lightning. (?) I'm lightning fast. 2.The personification is usually made (recognizable?) asked by Franco 274. ## Physics #1.) A wind turbine has a Cp of 0.42 and extracts 50 kW of power when the wind velocity is 25 m/sec. How long are the blades? (ρ = 1.2 kg/m3) #2.) An electric hot water heater is used to heat 30 gallons of water from 20 °C to 45 °C. a. What heat energy asked by Ricky 275. ## Ancient Greece question What were the main wars in ancient greece? Thank you. asked by Allyson 276. ## Chemistry What are the concentrations of the following solutions: a) a 200mL aqueous solution containing 4.26g sodium solfate. b) a 2.00 L aqueous solution containing 107.0g ammonium chloride NH4Cl. Plz can give me someone the answers for BOTH and the steps how you asked by Tarkan 277. ## physics A 0.280-kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. a)what impulse is delivered to the ball by the asked by Kim 278. ## math 415/10754 asked by diamond 279. ## Physics Assume the optimal coffee drinking temperature is 75°C, and further assume coffee has the same heat capacity and density as water. a. How much energy is required to raise the temperature of 1 cup (0.237 liters) of coffee initially at 25°C to the optimal asked by Steve 280. ## Math A triangle with two congruent sides and two angles that both mesuare 45 is a. scalence and right b. isosceles and acute c. isosceles and right d.equilateral and acute asked by Leah 281. ## algebra Solve x-9/x^2-4 < 0 and write interval notation asked by math help 282. ## physics how can we calculate potential energy if we don't have mass but we have force or newtons? asked by edith 283. ## trigonometry find all degrees solutions to the following equation: sin (A + 50 degrees)=1/square root 2 asked by maria 284. ## Algebra Express the sum below using summation notation. Use 1 as the lower limits of summation and i for the index of summation. 1/3+2/4+3/5+...+18/20 asked by Roger 285. ## algebra log9 1= _______ (fill in the blank) Let x=log2 1/32 . Write the exponential form of the equation and solve the equation for x. asked by math help 286. ## algebra the population P(t) of a new residential development t years after 2010 is P(t)=8000(1-e^-0.3t). What is the population for 2015? * algebra - Reiny, Sunday, December 5, 2010 at 6:19pm replace t with 5 and evaluate using your calculator (I got 6215) I was asked by math help 287. ## physics A 45 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 1.3 * sin( 0.6 * t ) where y is measured in meters and t in seconds. (a) What is the spring constant in N/m? k = N/m .162 NO HELP: You are asked by sarah 288. ## Math an auditorium has 50 rows of seats. THe first row has 20 seats, the row has 21 seats, the third row has 22 seats, and so on. each row having one more seat than the previous row. How many seats are there all together? asked by Brittni 289. ## Math There are three distinct ways to add four positive odd numbers to obtain 10: 1 + 1 + 3 + 5 = 10 1 + 1 + 1 + 7 = 10 1 + 3 + 3 + 3 = 10 Here, distinct means that changing the order of the numbers on the left-hand side of an equation does not count as a new asked by SkaterGirl 290. ## Re chemistry What are the concentrations in mass of the following solutions: a) a 200mL aqueous solution containing 4.26g sodium solfate. b) a 2.00 L aqueous solution containing 107.0g ammonium chloride NH4Cl. Plz can give me someone the answers for BOTH and the steps asked by Tarkan 291. ## language arts chapters 6-10 what is the summery of the witch of blackbird pond??? awnswers asked by person 292. ## English Can you please check these sentences, too? Thank you. 1.Hilary can't live without her mobile phone or without her car. She needs a car for work. 2.In contrast, Jason usually rides his bike around, catches trains and walks. Hilary need her computer to keep asked by Franco 293. ## Statistics True or False, In simple linear regression analysis, if the error terms exhibit a positive or negative autocorrelation over time, then the assumption of constant variance is violated. asked by Zack 294. ## Chemistry What is the ionization energy (in kJ/mole) of the hydrogen-like ion F8+ ? asked by Marissa 295. ## physics A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 800 rad, starting from rest, gaining angular speed at the constant rate α1 through the first 400 rad and then losing angular speed at the constant rate -α1 until it is again asked by Meghan 296. ## english What is the significance of the significance of the passage "Conscience says to me, "What had poor Miss Watson done to you that you could see her !@#$%^&er go off right under your eyes and never say one single word? What did that poor old woman do to you

asked by tracee
297. ## math

the avreage of annes saras and julies test score is 72 julie scored 10 and anne scored 10 points higer than sara. what were annes and sara scores?

asked by riley
298. ## science

how much does gravity affects my cannon shot?

asked by cannon ball
299. ## English

Can you tell me if all my verbs are correct? Not one of the ushers knows where the lounge is. Mumps is a common childhood disease that causes swelling in glands in the neck. Politics is always a popular subject both to debate and to study at college. The

asked by Sam
300. ## algebra

the number of cats that are homeless can be modeled by the equation N= 2.1t squared - 82t + 95 where N is the number of cats that are homeless and t=0 set as the current year.Use the quadratic model to find the number of years from now until the number of

asked by linda
301. ## physics

A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.57, how long does it take to move the box 9 m, starting from rest? (If the box

asked by Bill
302. ## chemistry

How many mL of a 0.90% (m/v) NaCl stock solution will you need to to prepare 250 mL of a 0.225% m/v NaCl solution?

asked by nate
303. ## science

A 75-kg person on skis is going down a hill sloped at 30.0°. The coefficient of kinetic friction between the skis and the snow is 0.15. How fast is the skier going 10.0 s after starting from rest?

asked by Bob
304. ## Advanced Physics

If wind blows at a speed of 30 m/s over the roof of your house, what is the pressure diference on your roof between the air inside and the air outside? What net force does this produce on a roof having an area of 175 m^2? 1.3 kg/m^3 is the density of air.

asked by Katie
305. ## math

-16=2.5k

asked by riley
306. ## advice

could you mark each verb used in bold. identify the specific tense used in parentheses. I have seen many examples of different saving plans. I planned on using these strategies in my personal life.

asked by brittany
307. ## ASU

A weightlifter performing a curl with a 320 N barbell stops the lifting motion with his forearms in a horizontal position. (a) If the line of action of the weight of the barbell is 27 cm from the axis of rotation (elbow joint), what is the magnitude of the

asked by jhkh
308. ## 11th grade

A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.75, how long does it take to move the box 7 m, starting from rest? (If the box

asked by Bill
309. ## US History

The Government and churches have demoralized, dehumanized massacred , robbed, raped, promised, made treaty? after treaty, and lied to us ... We must now destroy this political machine that man has built to prevent us from self-determination. " by Dennis

asked by Anonymous
310. ## BIOMECHANICS

The NCAA requires that a basketball dropped from a height of 1.83 m (measured to the bottom of the ball) bounce to a height of 1.24 to 1.37 m (measured to the top of the ball). Assuming the diameter of a typical basketball is 0.25 m, calculate the

asked by jhkh
311. ## Chemistry

A piece of solid carbon dioxide, with a mass of 6.8 g, is placed in a 4.0-L otherwise empty container at 21°C.

asked by Felicia
312. ## to Anonymous, <3, and Thanks to all Jiskha Teacher

We do not allow students to be successful imposters of our tutors. You have been banned from posting for this reason. Perhaps in a few days, you'll be unbanned ... to see if you've learned acceptable online behavior. =(

asked by Writeacher
313. ## Biomechanics

A weightlifter performing a curl with a 320 N barbell stops the lifting motion with his forearms in a horizontal position. (a) If the line of action of the weight of the barbell is 27 cm from the axis of rotation (elbow joint), what is the magnitude of the

asked by jim
314. ## english

is it grammatically correct to write My great aunthas lived at 1430 green street

asked by Anonymous
315. ## chemistry

the much used drug cocoaine is an alkaloid. Alkaloids are noted for their bitter taste, and indication of their basic properties. Cocaine, C17H21NO4 is soluble in water tot he extent of 0.17 g/100 ml solution, and a saturated solution has a pH of 10.08.

asked by Symone
316. ## Kinesiology

Joey weighs 77 lb and sits on a seesaw at a distance of 30 inches from the fulcrum. Jenny weighs 67 lb and sits on the opposite side of the seesaw at a distance of 48 inches from the fulcrum. Mikey weighs 30 lb and wants to play but doesn’t know where to

asked by Jessi
317. ## chemistry

Acetylsalicyclic Acid, HC9H704, is the active component is aspirin. Two extra strength aspirin tablets, each containing 500 mg of acetylsalicylic acid, are dissolved in 325 ml of water. What is the pH of the solution? (Assume Ka=3.3x10^-4)

asked by Symone
318. ## chem

A 1.00 L volume of buffer is made with concentrations of 0.350 M NaCHO2 and .550 M HCHO2. a) What is the initial pH of the buffer? b) What is the pH after the addition of .0050 mol HCL? c) What is the pH after the addition of .0050 mols NaOH?

asked by Symone
319. ## chemistry

Given .300 L of a buffer solution that is .250 M HC2H3O2 and .50 M NaC2H302, what is the new pH if .0060 mol HCL is added? what about .0060 mol NaOH?

asked by Symone
320. ## chemistry

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

asked by Symone
321. ## General Physic

The time it takes for an object dropped from the top of cliff A to hit the water in the lake below is twice the time it takes for another object dropped from the top of cliff B to reach the lake. If it takes 2.30 s for the object to fall from cliff A to

asked by Tiffany
322. ## Math help

asked by Riley
323. ## chemistry

Prepare 250mL of 2.00M CuSO4 from CuSO4 x 5H2O

asked by margrav2
324. ## chemistry

How many moles are in 3.0L of NO gas at STP?

asked by Jazminn
325. ## MATH

Someone please help me not sure if I even know what I am doing with any of this. write the following ratios in simplest form 5 3/5 to 2 1/10 5 3/5 2 1/10 x 100/100 = 8/20 = 2/5 the ratio of 7 dimes to 3 quarters 7/3 x 100/100 = 700/300 = 175/75 solve the

asked by TANGIE
326. ## Physics

If a large housefly 3 m away from you makes a noise of 43 dB, what is the noise level of 1200 flies at that distance, assuming interference has a negligible effect? Noise level of 1200 flies = ??dB HELP: Using the formula for decibels and the given

asked by HelpPlease
327. ## chemistry

describe the formation of a sr ion as its bons with chlorine to form SrCl2 and properties the compound will posess

asked by kevin
328. ## science

A wagon with a weight of 300N is accelerated across a level surface at 0.5 m/s . What net force acts on the wagon

asked by BJ
329. ## science

Why do I have brown eyes? can it change color?

asked by kayla
330. ## chemistry

Prepare 250mL of 2.00%(w/v) CuSO4 from CuSO4x5H2O

asked by margrav2
331. ## Math Please Help

The premiters of two equilateral triangles are in the ratio 2:3. If the perimeter of the smaller triangle is 16 cm what is the measure of a side of the larger triangle?

asked by Please Help!
332. ## Chemistry Lab Math

Prepare 600mL of a 100mM solution of glucose in 0.9% NaCl.

asked by margrav2
333. ## Chemistry- Buffers

a buffer is prepared by mixing .208 L of 0.452 M HCl and 0.5 L of 0.4 M sodium acetate. When the Ka= 1.8 x 10^-5 I figured out that the pH= 4.74 but then it asks how many grams of KOH must be added to the buffer to change the pH by .155 units?

asked by Mikey
334. ## science

describe how radioactive isotopes decay

asked by kayla
335. ## Spanish

1. "Perdón, ¿cuánto ____ este suéter?" "Veinte pesos." a. cuestan b. cuesta c. compra d. va A or B? 2. Busco una camisa verde ________. a. a tí b. a mí c. conmigo d. para mí D? 3. Quiero comprar unas manzanas? ¿_______ cuestan? a. Cuánta b.

asked by mysterychicken
336. ## English

Hi for my english class, we have to make an invention using cheap material that is useful, original, and provides a solution to a problem. We actually have to show the class like a prototype of it and I have no idea what to do! Mines on tuesday and I'm so

asked by John
337. ## chemistry

Prepare 600mL of a 100mM solution of glucose in 0.9% NaCl. Also need to prepare the 0.9% NaCl solution.

asked by margrav2
338. ## Math

To conduct a scientific experiment, students need to mix 90 mL of a 3% acid solution. They have a 1% and a 10% soulution available. How many mL of each of the two solution must they combine to pruduce 90mL of the 3% solution?

asked by James
339. ## chemistry

A student wants to determine of an irregularly shaped peice of sodium metal . The student is warned not to use water displacement to find the volume of the peice of sodium . Explain the reason for the warning and pffer a effective solution to the students'

asked by nina
340. ## Math

The number is between 3 and 10, you can make exactly 3 arrays with this number and it's not 9. What is it?

asked by Craig
341. ## Math

Which of the following shapes could not represent a top, front, or side view of a pentagonal prism? a. A pentagon b. A triangle c. A square d. A rectangle

asked by Please Help!
342. ## chemistry

How much 2.5mM solution of NaCl can be made from 30g of this pure salt?

asked by margrav2
343. ## business

a presentation conclusion has one purpose: to summarize your key points. True or false

asked by Marisela Cordova
344. ## Physics HELP!

A 650 N boy and a 490 N girl sit on a 150 N porch swing that is 1.70 m long. If the swing is supported by a chain at each end, what is the tension in each chain when the boy sits .75 m from one end and the girl .5 m from the other end?

asked by Jennifer
345. ## Chemistry

The melting point of aspirin : 128-137Celsius degree. The melting point of the crude aspirin was measured to be 128 Celsius degree. What does it indicate about the purity of the product?

asked by Cynthia
346. ## aLGEBRA

Tracy wants to purchase custom-made bumper stickers to advertise her business. Two websites offer different deals: Website A: Pay a fee of $116.00, plus$0.50 per bumper sticker or Website B: Pay a fee of $99.50, plus$0.65 per bumper sticker At least how

asked by math help
347. ## algebra

Solve and check all proposed solutions. Show work for solving and for checking. x+1/x-1 - 2/x^2-x=0

asked by math help
348. ## physics

A 45 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 1.3 * sin( 0.6 * t ) where y is measured in meters and t in seconds. (a) What is the spring constant in N/m? k = N/m .162 NO HELP: You are

asked by sarah
349. ## Chemistry

if 30.0 grams of molten iron (III) oxide reacts with 275 grams of aluminum, what is the mass of the iron produced.

asked by Kalen
350. ## Chemistry

Given the balanced equation, how many milliliters of oxygen gas at STP are released from the decomposition of 5.05 g of calcium chlorate?

asked by Kalen
351. ## Chemistry

Consider the following chemical equation: HgO(s) → Hg(l) + O2(g) How many milliliters of oxygen gas at STP are released from the decomposition of 3.00 g of mercuric oxide?

asked by Kalen
352. ## Chemistry

Consider the following chemical equation. MnCl2(s) + H2SO4(aq) → MnSO4(aq) + 2 HCl(g) How many grams of manganese(II) chloride must react with sulfuric acid to release 50.0 mL of hydrogen chloride at STP?

asked by Kalen
353. ## Chemistry

Consider the following chemical equation. H2(g) + I2(g) → HI(g) Assuming all gases are at the same temperature and pressure, how many milliliters of hydrogen iodide are produced from 825 mL of H2?

asked by Kalen
354. ## Chemistry

Consider the following chemical equation. Cl2(g) + O2(g) → Cl2O3(g) Assuming all gases are at the same temperature and pressure, how many milliliters of oxygen gas must react to give 3.50 L of Cl2O3?

asked by Kalen
355. ## Chemistry

Consider the following chemical equation. SO2(g) + O2(g) → SO3(g) What volume of sulfur dioxide gas reacts with 37.5 L of O2? The reaction conditions are 875°C and 1.00 atm pressure.

asked by Kalen
356. ## statistics

15.34 In a four-digit lottery, each of the four digits is supposed to have the same probability of occurrence. The table shows the frequency of occurrence of each digit for 89 consecutive daily fourdigit drawings. Research question: At á = .01, can you

asked by Anonymous
357. ## Math Please Help

Which statement is not true? Two or angles that are supplementary have a sum of 180 or Two angles that are complementary have a sum ot 45

asked by Please Help!
358. ## bonar law

Colonel Harry a. Froboess of Switzerland jumped upward and outward from a windonw of a blimp and landed in a body of water on June 22, 1936. His jump was 120m, about the height of a 40-storey building. The path of his jump can be represented by the

asked by tina
359. ## Algebra

Four circles with centers A,B,C,and D are mutually tangent. The areas of circles A,B,C, and D are 25pi, 100pi, 16pi, and 225pi respectively. How many units are in the perimeter of quadrilateral ABCD?

asked by Tyler
360. ## math

A rectangular skating rink measuring 30m by 20m is doubled in area by adding a strip at one end of the rink and a strip fo the same width along one side of the rink. Find the width of the strips if the enlarged rink is still rectangular.

asked by tina
361. ## geometry

In right triangle ABC, angle A=3, angle B=60, and angle C=90. Find AB with AC is 12 ?

asked by Eliza
362. ## MATH

A triangle with two congruent sides and two angles that both measure 45 is a.scalene and right b.isosceles and acute c.isosceles and right d. Equilateral and acute

asked by Please Help!
363. ## college

1. How did U.S. manufacturers become vulnerable to offshore outsourcing? Give examples to support your answers.

asked by Lady
364. ## math

Find the value of x. Give answer in simplest radical from. (It's a triangle split into 3 parts)

asked by camber
365. ## 7th grade

How are landform, like dells, formed?

asked by something
366. ## 10th grade

jordan has 2 quarters, 1 nickel, and 3 dimes. if he took 1 out and then a second one without replacing the first coin, what is the probability that both coins were dimes?

asked by audrey
367. ## Chemistry

Describe the spectrum of the light from a fluorescent lamp and from an incandescent (tungsten filament) lamp, and try to explain what you observe. So fluorescent lamps use electricity to excite mercury vapour, and the excited atoms produce short-wave UV

asked by Jon
368. ## chemistry

If the heat of fusion for ethyl alcohol is 26 cal/g, how many grams must freeze to release 780 cal?

asked by jacee
369. ## math

Suppose two dice (one red, one green) are rolled. Consider the following events. A: the red die shows 5. B: the numbers add to 4. C: at least one of the numbers is 3. D: the numbers do not add to 10. Express the event "The numbers do not add to 4." in

asked by Liz
370. ## physics

a 40 kilogram barrel is rolled up a ramp 10 meters long to a height of 5 meters how much work was done?

asked by Anonymous
371. ## Calculus

Find the integral by substitution ∫ [(16 x3)/(x4 + 5)] dx ∫[ 4 x/(√{x2 + 3})] dx ∫ 8 x2 e4 x3 +7 dx PLEASE help with all three. i'd really appreciate it

asked by Erika
372. ## Calculus

∫4 [( ( ln(z) )^ 2)/z] dz ∫[( 7 e^(7 √x))/ √x] dx ∫[(2 x + 5)/( x^2 + 5 x + 2)] dx

asked by Jane