Questions Asked onMarch 23, 2009

1. physics

In the Figure the pulley has negligible mass, and both it and the inclined plane are frictionless. Block A has a mass of 1.3 kg, block B has a mass of 2.7 kg, and angle è is 26 °. If the blocks are released from rest with the connecting cord taut, what

Classify th triangle by its sides and then by its angles.

3. Social Studies

Could you please check the definition that matches with the term. Here are the terms: free enterprise Economics trade-off economic models market econonmy total costs wants marginal benefit fixed costs rational choice Here are the definitions study of the

4. Algebra

The volume of a rectangular box is given by the formula V = lwh, where l is length, w is width, and h is height. What happens to the volume if the length and height are doubled and the width is tripled? I don't know how to solve this problem at all. Thank

5. chemistry help

Determine the empirical formula for each substance. 1. A dead alkaline battery is found to contain a compund of Mn and O. Its analysis gives 69.6% Mn and 30.4% O. 2. A compound is 38.77% Cl and 61.23 %O. 3. Magnetic iron oxide is 72.4 % iron and 27.6%

6. physics

The mass of the blue puck shown below is 10.0% greater than the mass of the green one. Before colliding, the pucks approach each other with momenta of equal magnitudes and opposite directions, and the green puck has an initial speed of 8.0 m/s. Find the

7. Chemistry

If 2.40 g of CuSO4 is dissolved in 8.57 x 10^2 mL of 0.360 M NH3, calculate the concentrations of Cu^2+, NH3, and Cu(NH3)4^2+???? Don't even know where to start.

8. Physics: Lenses

1) A convex lens with a focal lenght of 4.0cm is placed 20.0cm from a concave lens with a focal lenght of 5.0cm. Find the position of the image when the object is placed 12.0c, in front of the convex lens. 2) A double concave lens has a refractive index of

9. Science

what is the source of the magma that fuels the island arc complex? a. continental crust b. the subducted plate c. the overrriding plate d. the volcanoes that make up the complex

10. Romeo and Juliet

Why does the nurse agree to help juliet marry romeo? By the way it's in act 2 scene 5. I can't find the answer. Thanks for your help

11. English

Can any kind person proof this please Change the following from the active into the passive(the first one has been done as an example) A crocodile eats Henry â€“ Henry is eaten by a crocodile. A crocodile is eating Henry â€“ Henry is being eaten

asked by Mick c

List the possible rational roots of 2x^3 + 17x^2 + 23x - 42 = 0 My answer: the possible rational roots are {±1, ±2, ±3, ±6, ±7, ±14, ±21, ±42. ±1/2, ±3/2, ± 7/2, ±21/2}. Correct?

13. Chemistry

Xenon of mass 5.08 g reacts with fluorine to form 9.49 g of a xenon fluoride. What is the empirical formula of this compound? A) XeF6 B) XeF4 C) XeF2 D) XeF E) Xe2F I am not familiar with these types of empirical formula problems. If I'm given the

14. science

Glacial deposits often form at high latitudes near the poles. Explain why glacial deposits have been found in Africa.

15. chemistry DRBOB

Calculate the hydrogen ion concentration, in moles per liter, for solutions with each of the following pH values. pH=1.10 im guessing that this is what i did in my previous question except now i have to do it backwards. but i don't know how to do the

16. biology

what is the relationship between rate of ion exchange and surface to volume ratio?

17. Romeo and Juliet Help

For act 2 scene 4 I don't understand this question. It says what malapropisms does the nurse use?

18. French

Could you please check these answers also thanks. Directions: Use the verb fais in the following blanks. (fais, fais, fait, faisons, faites, and font) Hugo et moi, on est copains. Il est très intelligent. Hugo (1)------ du russe. Moi aussi, je (2)------

19. Pre-Cal.

Which of the following results in the graph of f(x)=x^2 being expanded vertically by a factor of 3 and? reflected over the x-axis? a. f(x)=1/3x^2 b. f(x)= -3x^2 c. f(x)= -1/x^2 +3 d. f(x)= -1/3 x^2

20. math place value numberation

write expanded notation.40,050=----

I need help answering these questions 1. State the Common Ratio of the following Geometric sequence 3/4 , 3/10 , 3/25 , 6/125 2. In the Arithmetic Sequence below, X = ___ 100 , ___ , _X_ , 64 3. For the Geometric Sequence below, X = ___ _X_ , 48 , ___ ,

22. physics, lenses

I need to calculate the magnification, m of an objective lens, so I can then x it by the eyepiece value for M to get the total magnification. I need v/u (v is dist from lens to image; u is dist of object to lens) I'm using 1/f = 1/v+1/u rearranged for 1/v.

23. science

How is magnetism used to support the theory of seafloor spreading?

24. chemistry

Calculate the hydrogen ion concentration and the pH of each of the following solutions of strong acids. (a) 0.00010 M HCl if you could just explain how to do this that would be great! thanks

25. Estimating rounding(Math)

Round each to the nearest ten dollars, then estimate the answer. \$88.99=---dollars +9.69=---dollars ----------------- Total is about---Dollars. \$34.00=----dollars -19.29=----dollars ------------------ Differences is about-----dollars.

26. thermal physics

What mass (in grams) of steam at 100°C must be mixed with 340 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 12.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and

27. To Bob DD

Because of your terribly rude and uncalled-for remarks directed at one of our tutors, your ugly post was removed. Please do not post here again.

28. English

If I had studied harder, I would have passed the test. Is this Future perfect? or based on the condition is it past? If I had studied medicine I would be a doctor. The condition is I would be. So this sounds present perfect. True?

asked by Mick c
29. French

Could you please check my answers thanks. Directions: Give my own answers. 1. Tu fais quelquefois la cuisine chez toi? Answer: Oui, je fais quelquefois la cuisine chez moi. 2. Tu fais études dans un lycée français ou dans une école secondaire

30. HCA 220

Due Week 5 Day 4 This discussion question is an audio dialogue. You will start the discussion and your classmates will help you finish it by responding to you. You must also provide a written transcript of all of your responses. Your portion of the

31. music

i have to do a project about 'west end musicals' can anyone suggest how i structure his and what i should include because I don't know what to include. shall i include a page about a popular musical and so on or not? can anyone find any useful sites which

32. Algebra

Solve using multiplication principle. 2.8x = 22.4

33. Health

I need answer to these questions Research the Walkerton Tragedy. Explain what happened, why and what specifically is being done to prevent it happening elsewhere. Your report should be one to two pages long. Air Pollution Often we do not think of air

34. math(story problem

I still cant figure out the problem with the rider of the scorpion. Riders of the scorpion must be at least 48inches tall.Jim is 4feet 2 inches tall. Kim is 3 inches shorter than jim. Give their height in inches and tell who may ride.

35. English

1. I am in the first grade in London Middle School. 1-2. I am in the first grade at London Middle School. (Are both prepositions correct?) 2. How many hours does Bora study in school? 2-2. How many hours does Bora study at school? (Which preposition do we

36. physics

A 5.00 g bullet moving with an initial speed of 340 m/s is fired into and passes through a 1.00 kg block. The block, initially at rest on a frictionless, horizontal surface, is connected to a spring of force constant 860 N/m. (a) If the block moves 5.50 cm

37. Social Studies

Could you check this answer that goes with this passage. It was... the greatest aggregation of labor and capital eber gathered in one place. It employed 30,000 men; it supported directly 250,000 people in its neighborhood, and indirectly it supported

38. story problem(math)

Riders of the scorpion must be at least 48inches tall.Jim is 4 feet 2 inches tall. Kim is 3 inches shorter than jim. Give their heights in inches and tell who may ride.

39. Spanish

¿Qué le duele mucho a Andrea? I have: El estómago ha dolado mucho a Andrea. I'm not sure if the le has to be in the answer though because I don't really understand what the le means.

40. Algebra

Use multiplying by 1 to find an expression equivalent to 16/7 with a denominator of 42z.

41. Social Studies

Could you check this question it goes along with the passage. Passage: Manufacturing establishments become a blessing or a curse according to the facilities which they create for acquiring a living, to the necessary articles which they provide, and the

42. English

1. Do you know what? 2. What do you know? (What is the difference between them?) 3. Which club do you go to? 3-1. I go to a dram club. 3-2. I go to the drama club. (Which answer is right? Are both correct?) 4. I am Bora, your student from last year.(Is it

43. Chemistry

I did a lab where I had to decompose the compund patassium cholorate (KClO3)by heating,I had to weight the test tube then the test tube with the potassium chlorate to get the weight. I then had to heat it for several minutes and letting it cool down before

44. math

Four quilters are preparing patches for a quilt. When finished, the quilt will contain 200 patches. The quilters’ contributions thus far are in the table below. Name Number if patches Lia 65 Brian 17 Elle 88 len 6 Find the probability that a randomly

45. Independent and dependent events

A six-sided-cube is labeled with the numbers 1, 2, 2, 3, 3, and 3. Four sides are colored red, one side is white, and one side is yellow. Find each probability. Tossing 2, then 2. Tossing red, then white, then yellow.

46. Algebra

Solve: Type an integer or fraction 8x=4=6x=5 I think the answer is 1/2 or .5 Thanks

47. chemistry

A solution is prepared by dissolving 10.00g of a monobasic salt in a total volume of 1.00litres. Th pH of this solution was measured at 13.07 and a conductivity experiment determined that this salt was completely ionized in solution. What is the molecular

48. math

a string of lights is strung from the top of a fence post that = 4 ft tal flagpole=16 ft tall. the fence post=9 ft tall from the flagpole what's the length of the string of lights from the top of the post to the top of the pole? /

49. math (place value numeration)

What is ten less than65,403?

50. estimation rounding(math(

round each to the nearest ten dollars, then estimate the answer. \$34.99=---dollars. -19.29=---dollars ----------------- Difference is about---Dollars.

14-6(-8)+5 =

52. Math

For each of the following, find the parametric equations of the line that passes through the point P with direction vector d. In each case, find two points on the line different from P. a) P(1,1) d=(4,-4) b) P(5,0) d=(1,3) answer at the back of the book

53. Social studies

Could you please check these other sets of terms. Here are the terms: scarcity cost benefit analysis marginal revenue needs incentives economy opportunity cost variable costs capitalism marginal cost food, clothing,shelter, and other things required for

54. French

Could you please check these answers thanks so much. Directions: give own answers 1. Qu' est-ce que tu fais comme langues? Du français? De l'espagnol? Answer: Je fait du français. 2. Et tes copains, qu'est-ce qu'ils font comme langue(s)? Answer: Ils font

55. Statistics

A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1- hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will

56. Chemistry

Rank from most to least active based on placement on periodic table : Magnesium, potassium, sodium.

57. Math

Find the smallest N such that N!is evenly divisable by 12^19.

58. college

Maximize z=16x + 8y subject to: 2x + y0

59. college math

Maximize z=16x + 8y subject to: 2x + y0

60. astronomy

Observations with the Hubble Space Telescope revealed a planet about 16 AU from a star whose mass is the same as our Sun’s mass. How long does it take the planet to orbit the star?

8{6-4(2-5)}=

-9 - (-3) =

63. French

Could you check this answers also thanks. Directions use the correct form of the verb faire. Je vais chercher Sophie. On va ---------- les courses. Answer: fait Vous ------- souvent les courses? Answer: faites Mon cher ami, nous -------- les courses tous

64. Physics 30

How would I figure out the horiz. distance if I have the velocity and the vertical distance? I also have the acceleration. What formula could I use?

65. science

Why do many earthquakes but few volcanic eruptions occur in the Himalaya?

66. Social Studies

I need help with these two multiple choice answers could you check them first. First here's the passage that goes with the two questions. Let our farmers make and wear their homespun; raise in greater plenty corn and wheat, which will enable them to raise

67. english

Throughout the novel it is evident that Lennie and George share a deep and faithful relation with one another. For example, Although George acts as Lennie’s caretaker, they both have a sense of trust, companionship, togetherness which no other characters

68. history

How did the Beatles change music and affect today's music? I have found some information on this, but I am doing a presentation and feel like I am repeating the same thing about peace and their song lyrics over and over again. Any more in-depth info would

69. Chemistry

Are volume and temperature directly proportional?

Four quilters are preparing patches for a quilt. When finished, the quilt will contain 200 patches. The quilters’ contributions thus far are in the table below. Name Number if patches Lia 65 Brian 17 Elle 88 len 6 Find the probability that a randomly

71. English

I'm writing an essay that goes into how important body language and voice tone is. I remember reading a quote online that said something about how BLANK percent of what people take away from what you say is from how you say it, not what you say. But I

72. math(vocabulary concepts facts

A------is 1/1000 of a dollar.

73. English

What would the following time expressions change to in reported speech? Write a sentence in direct speech followed by one in reported speech to illustrate each change. The first one has been done for you as an example. a) today â€“ that day Direct

asked by Mick c
74. Math(place value numberation)

in 92,370 the nine stands for-----.

75. Calculas

how to find the x intercepts for f(x) = 3x^3+7x^2+3x+1 please show your steps

76. english

Even as mankind evolved from Neanderthals to humans, It has never officially withdrew its inherent selfish predatory trait. Evolution has taught mankind an evil lesson: “Survival of the fittest”. Likewise, in the text George shoots Lennie not only as

Explain why volcanoes do not form along the San Andreas Fault.

78. science

Explain why the fossil of an ocean fish found on 2 different continents would not be good evidence to continental drift.

79. math

this is fractional parts what is 1/10 of 50

80. Math

Assigning each letter of the alphabet the numerical values of its position in the alphabet (a=1, b=2, c=3, etc) find a familiar first name witha product of letter values that is equal to 100,000.

81. english

what is a pronoun

82. law...?

Hi, l'm wondering, what are laws about assisted suicide and euthanasia, and the thing l need the most is: What countries allow euthanasia? Which states allow euthanasia? Which countries allow assisted suicide? Which states allow assisted suicide? Thanks!

83. math

how to factor 3x^3+7x^2+3x+1

84. Final thought+Suggestion

Okay, I recently made a post about converting the homework help section into a homework help forum. I have heard that many tutors have suggested this but there were some problems that occurred. What do you guys think? I want to here opinions from all the

85. college english papre

I have paper written in english, not sure its correct or not. My english is kinda bad. grammar and spelling mistakes. If someone can help me out with this one. the paper is not long 2 pages. so i think it a couple minutes work. You can mark the mistakes

asked by YW paper
86. Physics

Calculate g at the midpoint of the earth moon system.

asked by Christina AAAA
87. Math

Estimate the velocity of the groundwater flowing from a point 1000 feet from a creek. The point is 30 feet above the surface of the creek and the permeability of the subsurface is approximately 10-5. Approximately how long would it take the groundwater to

88. Algebra

Evaluate (-6y) to the second power and -6y to the second power when y=2 I did not know how to put the little two by the numbers. Thank you!

89. Algebra

Find an equivalent expression without parentheses: - (a-14) =

90. math

The cost, in millions of dollars to remove x% of pollution modeled by c=6000/200-2x. A) what is the cost to remove 75% of the pollutant? B) what is the cost to remove 90 % of the pollutant ? C) what is the cost to remove 99 %of the pollutant?D) for what

91. english

could anyone proof read my essay? could i send it to someone? If i post it here people might steal it. please i really need someone to proofread it.

92. Math

y = a(x - h)2(sqaured) + k Where would I put a number in order to stretch or compress the graph vertically in the equation above? And what does the a represent?

93. Physics

Regading my question yesterday about the ball being caught by the man on the scales (Sun. 3:47), I'm now wondering if, to get the final weight on the scales I need to add the actual ball's mass of .50 kg AS WELL AS the force of the ball on the man to his

94. french

what type of adjectives are these? beau nouveau vieux

95. circuits

the zero input response of a series RLC circuit with R=80 ohms is V(c)=2e^(-2000t)cos(1000t)-4e^(-2000t)sin(1000t) V for t>0 if the initial conditions remain the same, what is the zero-input response when R=40 ohms

96. Math

How many rectangles are thre in a 6 by 9 grid that are not squares?

97. CDA

I need two resource for challenger behavior like, biting, hitting, or shyness

98. english

explain Romeo and Juliet Scene 4 A street near the Capulet house.

99. Geography

What are the namesz of insects that live on cattle?

100. Environmental Science

1. Estimate the velocity of the groundwater flowing from a point 1000 feet from a creek. The point is 30 feet above the surface of the creek and the permeability of the subsurface is approximately 10-5. Approximately how long would it take the groundwater

101. math

a-------is1/100 of a dollar.

102. Physics

Hi again, Can anyone help me with the physics problem I posted earlier today (Sunday) at 3:47 p.m. I would really appreciate it!!Thanks!

103. 5th grade math

an someone help me learn an easy way to remember metric conversions?? thanks, Seth

104. math place value numberation

in 92,370 the nine stands for what.

105. Math

How do you write an equation for the line that is parallel to the given line and that passes through the given point: y=-3x;(3,0) I know how to do this using point-slope form, but not with slope intercept form..

106. English

If it rains tomorrow, I'll buy and umberella. Is this future tense?

asked by Mick c
107. science

at which type of plate boundary does rift volcanish occur

108. English

Can someone check this for me please. Report these spoken remarks to a freind, making the necessary changes. 1. I live it a. she....said that she loves it. 2. I am leaving in half an hour. a. He said that he's leaving in half an hour. 3. The rain has

asked by Mick c
109. calculas

how to find the x intercepts for f(x) = 3x^3+7x^2+3x+1

110. Natural Logs

When you are subtracting functions with ln, I know you divide the numbers after ln, but what do you do with constants in front of ln? For example, I'm currently dealing with: 4ln8 - 4ln3 Thanks!

111. world geo.

Hi can anybody help me with some websites leading to interesting facts about mt everest. For example its history,the culture,first women to climb.etc. Thank you.

112. health

During an emergency room examination for an injured arm, the physician palpates the arm’s entire length, starting at the shoulder and ending at the fingers of the hand. This process takes him from a/an _______ position. A. right to left C. anterior to

113. Math

If lynn can ytpe a page in p minutes, what piece of the page can she do in 5 minutes?

114. science

Combining a base and an acid forms A. DNA and gas. C. sodium hydroxide. B. ions. D. salt and water I think (b) Is this correct?

115. Math

What is the area of a circle with a diameter of 12 ft by pi? Please help me with the formula~thanks!

116. social studies

Can someone give me a link that explains the problem of scarcity or if you have any facts feel free to share them.

117. TECHNOLOGIES IN THE OFFICE

you have a small business and must decide what method to use to prepare bills for your 107 CHARGE customers. you want to send the customer the original copy and want to keep three copies in-house. THE MOST EFFICIENT CHOICE IS TO

118. Algebra

Find -x when x=-49/39. Thanks!

119. Social Studies

Can I get someone's opinion on this: How has electricity over the past century and a half chaged the way we manufacture things? I'm not going to take your answer but I just want to know what you think.

120. Math

When y-1=-4/5(x-3) is written in standard form using positive integers, what is the smallest possible coeficcient of x?

121. AP World History

When the civil war ended, who was in control of the Russian government? And what actions related to social and religious issues were taken by that government in the 1920's and 1930's

122. Sociology

I'm currently writing an essay for a Sociology class(Sociology of Everyday life), my topic was on love and prior to the essay we had to write three proposals for our essay addressing our topic with a focus on the micro-sociological aspect of it. The

123. chemistry

A solution is prepared by dissolving 10.00g of a monobasic salt in a total volume of 1.00litres. Th pH of this solution was measured at 13.07 and a conductivity experiment determined that this salt was completely ionized in solution. What is the molecular

124. french

is it correct to say "je vais mettre les affiches" or should it be "je vais monter les affiches" (as in "I'm going to put the posters up")? Merci

why do many earthquakes but few volcani eruptions occur in the Himalaya? PLEASE HELP!!!!!!!!!!!

126. Science

the black hills are an example of which type of mountain building? a. uplifted mountains b.fault-block mountains c.volcanic mountains d. oceanic mountains

127. Math

Assigning each letter of the alphabet the numerical values of its position in the alphabet (a=1, b=2, c=3, etc) find a familiar first name witha product of letter values that is equal to 100,000.

128. Geometric Series

I need to know the equations of these were n = 1 1) 1/2 - 1/4 + 1/8 - 1/16 + . . . 2) 1 + 2 + (2^2)/2 + (2^3)/6 + (2^4)/24 + (2^5)/120 + . . . 3) 0 + 3 + 8 + 15 + 24 + . . .

129. Math

Most natural numbers can be expressed as a sum of two or ore consecutive positive intergers. Find all natural numbers between 1,000 and 10,000 which cannot be expressed as a sum of tow or more consecutive positive intergers.

130. Algebra

The area of a circle is given by the formula A = pi*r^2 and the circumference of the circle is given by C = 2*pi*r. Find the ratio of the area to the circumference. What happens to this ratio if the radius is quadrupled? Thank you!

131. Math

is the slope of the equation y=x 0?

132. Science

List 10 Tundra producers. Thank you!

133. math

what is the inverse of addition?

134. history

Submit a 150- to 200-word response comparing Nixon’s policies of engagement with foreign policy strategies used during the Cold War.

135. math

what is 1/100 of a dollar?

136. Math

Define a parallelogram

137. Suggestion to Website

I was just wondering if it was a good idea to convert this part of the website into a homework forum? It would be alot more organized that way because everything would be under sections and stuff. People can also distinquish between tutors and students as

138. ARTS

I LIVE IN WATER IF YOU'LL CUT MY HEART I AM AT YOUR DOOR IF YOU CUT MY TAIL I A FRUIT KNOW IF YOU'LL CUT BITH MY HANDS AND TAIL I AM WITH YOU WHO AM I?

139. social studies

i need to know hre diffrent trading goodes for each province in canada

140. Help HEALTH

where can I find the meaning of root words? for example:furc/o valve phag/o

141. math

3 ducks and 1 chick cost the same as 2 geese. one duck, 2 chicks, and 3 geese cost \$25. what is the price of each? i get: 3d+c=2g d+2c+3g=\$25 i'm stuck from there. is there something missing? thanks in advance for any help.

142. chemistry

AgNO3 + KOH formula and name

143. circuits

in a parallel RLC circuit you have L=100mH and i= inductor current i=50e^(-4000t)-10e^(-5000t) mA how do you find R and C??

What is the name of the large island that is part of New York?

145. World History

What were the goals of "The Big Four"?

147. italian

I realy don't want this with a computer translation because it never comes out the right way could someone translate it for me? If I won 1.000.000 dollars I would go to Sardegna with all my friends for a whole year.To get their since we live in America we

148. english poem

how to write a poem about mrt train

1/6 of42

150. health

The most serious type of allergic reaction is A. atrial fibrillation. C. anaphylaxis. B. psoriasis. D. lupus. I think it is (c)

151. 9th Pre Algebra

I need help with exponents -n6 for n=2

152. social studies

I need help with this question according to economists do all societites face scarcities?

153. Science

Is orogeny the process that all 3 types of convergent boundaries have in common?

154. Science

What does a 3d model of cesium look like?

155. french

what type of adjectives are these? beau nouveau vieux