# Questions Asked onJanuary 27, 2011

1. ## Chemistry

If each tablet of a dietary supplement contains ~20 mg of iron how many tablets should we analyze to provide ~.50g of Fe2O3?

2. ## 5th math

what is the average number of hot dogs sold? 12,12,13,17,21,22,22,22,22,30,32,37. please! show me this how to solve this problem? my last question for today.thank you very much without your help . it;s impossible to understand this problem.

3. ## math

please explain how to get the answer to this question. five students make the following guesses on the number of jelly beans in a jar: 72, 78, 68, 60 and 84. the guesses were off by 14, 2, 4, 6 and 10 (not in order). how many jelly beans are in the jar?

4. ## 5th math

Mr. davison has 30 students in his class . He has four more girls than boys. How many boys are in Mr. Davision class? can you please check my answer? I got 11 boys . does it sound about right ?

5. ## Trig

The diameter of the wheels on your car (including the tires) is 25 inches. You are going to drive 305 miles today. Each of your wheels is going to turn by an angle of how many degrees.

6. ## arithmetic

can you show me how to do 5/6 x 4

7. ## 5th math

how do you divide 302 by 33,593? how do you divide 67 by 48,384? show me step by step pleae! if you can?

8. ## Chemistry

I'm sorry I'm just really confused by ionization energies and the heat of formation. Could you explain how to set up this problem? Use the data (kJ) for ionization energies, electron affinities and heats of formation to find the lattice energy of Fe3O2(s)

9. ## Biology

What is the relationship between an increase in light intensity and photosynthetic rate in leaves from a corn plant? How does this relationship compare with the tomato plants?

10. ## Chemistry

If the mass of isolated Fe2O3 were .300 g, what is the average mass of iron per tablet?

11. ## Chemistry

What mass of 3.0 wt% H2O2 solution is required to provide a 25% excess of reagent for the following reaction with 12 dietary iron tablets that contain ~15 mg of iron per tablet?

12. ## math

how many 16 and 15 in 319?

13. ## Chemistry

Will Zinc react with Zn(NO3)2, Cu(NO3)2,Pb(NO3)2, Mg(NO3)2, AgNO3, Al(NO3)3, or Fe(NO3)3

14. ## physics

A stationary 1.67 kg object is struck by a stick. The object experiences a horizontal force given b F = at-bt^2, where t is the time in milliseconds from the instant the stick first contacts the object. If a = 1500 N/ms and b = 20N/ms^3, what is the speed

15. ## chemistry

how can i make saturated CuSO4.5H2O saturated solution.Please tell temperature also?

16. ## chemistry

A solution is prepared by mixing 5.00 grams of compound Z (molar mass 15.00 g/mol) in 100.0 ml of water. The density of the solution is 1.09 g/ml. Calculate the molarity of the solution

17. ## chem

a solution of A (molar mass 100g/mol) and B (molar mass 1.10 x 10^2 g/mol) is prepared by mixing equal masses of the two. Find the mole fractions of each component in solution

18. ## Organic Chem

What is the monomeric unit of a chain of molecules joined by peptide bonds? Answer:?? If anyone can help answer this question. Thank you.

19. ## chemistry

when should the temperature be recorded for an experiment in order to determine the boiling point?

20. ## Physiology

Pure gold has a density of 19 g/ml. If you bought a gold ring and found it had a volume of 0.3 ml and it weighed 5.7 grams, is it real gold? Show me your calculation

21. ## Physiology

What is the volume of 0.23 kg of pure water?

22. ## Calculus

Under what conditions for f'(x) and f''(x) can a graph be "straight" without being horizontal? (I'm learning critical points and points of inflection...) Thank You.

23. ## physics

Explain why the occupants in a running car observe objects on the roadside as though they are running backwards.

24. ## chemistry

How much heat is associated with converting 100 g of steam at 112 degrees C to ice at -5.3 degrees C

25. ## Spanish (URGENT)

Habia una vez hay un conejo pequeno. El no estaba contento. Queria mirar como les otros animales. Cuando él vio Mr. Bushy Tail, la ardilla, él quise una cola que se parecio las ardillas. Entonces, él vio Mr. Porcupine y el quise (quills). Entonces él

26. ## ART

i need to describe my public identity by drawing. can you please give me some ideas? please? i want to know your public identity so that i understand mine. i don't know anything ... but is it ok if i say, i catch the bus to school everyday and i like

27. ## math

given AB and AD are tangents of C, and the m

28. ## Algebra

Find the midpoint M of the line segment joining the points C = (-4,-5) and D = (2,-1). I got (-1,-3) can you check me? Thanks

29. ## math

The masses of newborn children are normally distributed with a mean of 3.4 kg and a standard deviation of 0.8 kg. A newborn is at risk if the baby'd mass falls in the lowest 4%. These babies have a mass of less than ____?

30. ## Algebra

Compute the value of the discriminant and give the number of real solutions to the quadratic equation. 2x^2+5x-7=0 Discrimnant= number of real solutions=

31. ## English

I need a sentence with the word tree

32. ## HELP

Calculate the change in energy when 665.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K So i used the formula change in energy = change in H - nRT

33. ## geometry

PLEASE HELP ME! i have this homework due tomorrow and i only have 1 question left and am sooo desperate for an answer: The diameter of the Dome of the Rock in Jerusalem is 20m. If it is plated with gold that is 5cm thick, find the cost of plating the dome

34. ## English

Can someone explain to me the following answer: swan cow spider mice Why doesn't the mice belong here?

35. ## math

what is 0.775 rounded to nearest cent

36. ## MATH

A dartboard has the numbers 3, 6, 9, 12, 15, 19, 21, 25, 27, and 30 on it. What is the fewest number of darts that could be thrown if two darts tcannot land on the same number and if the sum of the scores must be 50?

37. ## science

how do hydrogen bonds relate to the transfer off heat from the equator towards the poles of earth

38. ## chemistry

A student graphs the data from the experiment to determine how pH affects reaction rate and finds that the slope of a line through the data for pH = 7 is 5 seconds per absorbance unit. What has he/she done wrong?

39. ## Math

what is the GCF and the LCM fo 10-75-55 could you please explain to me how to do this. Thank you

40. ## trig

simplify (3x^2-5x+4)-(5x^2+7x-7)

41. ## Science

Calculate the change in temperature with respect to height for the following, Height (KM) Mid-Lattitude Temp (C) 0 15 11 -56 16 -56

42. ## MATH

The eaves of a roof sloping at 23° overhand the walls, the edge of the roof being 75 cm from the top of the wall. The top of the wall is 5.4 metres above the ground. What is the height above the ground of the edge of the roof, to the nearest centimeter?

43. ## Elementary Math

What if we made a pattern by joining pentagons? If the length of each side of the pentagon is 1 unit, then what would be the perimeter of n pentagons joined together? Note: The perimeter is the distance around the outside of the figure.

Describe two planning processes typically used in programs for children, youth, and families.

Discuss generally the role of planning in each of the three levels of positive behavior support (PBS).

Why does the chosen developmental theorist appeal to you? Relate the chosen theory to a recent or upcoming developmental stage or phase in your own life.

47. ## world literture

How do the villagers respond to the spider girl? What do you think their response symbolizes -- how does it relate to the rest of the story?

48. ## English

Hello! What could I do as a lead in activity with two 5th graders? We have a 45 minute lesson tomorrow and I want to break the ice with a funny game. The topic is not important. Does anyone have something that lasts for 10 minutes?

49. ## Math Algebra 2

Evaluate p² - r² for p = 10, r = -4 and t = 5.

50. ## Chemistry

Complete combustion of 7.70 g of a hydrocarbon produced 23.7 g of CO2 and 10.9 of H2O. What is the empirical formula of the hydrocarbon? I first calculated the moles of both the carbon dioxide and the water, but I have no idea where to go from there. Any

51. ## Chemistry

Many power plants produce energy by burning carbon-based fuels, which also produces CO2. CO2 is a greenhouse gas, so over-production can have negative effects on the environment. Use enthalpy of formation data to calculate the number of moles of CO2 (g)

52. ## Geography

explain how Western Europe's physical geography affects its climate, settlement patterns, culture, and economy. Can anyone give me a website link to go to for this information?

53. ## joe has a mass of 50 kg and sally has a madphysics

joe has a mass of 50 kg and sally has a mads of 30 kg. they sit in class with a separation of 0.5 meters. Find hhe gravitational attraction between joe and sally

54. ## Com 220

How does the author of “A Nation Apart” organize information to build his argument? He organizes the information by first presenting problems of China's economic issues. He then goes on to show you some statistics from his sources and quotes the

55. ## physics

An automobile weighing 15000n crashes into a wall with a velocity of 5m/sec. If the car moves .15m before coming to a stop, what average force does the car exert? on the wall?

56. ## science

A baseball player throws a ball vertical upwards describe this motion of ball in words

57. ## geometry

francisco designed a triangular garden surrounded by three square gardens. the area of garden c (the largest garden) is 400 sq. ft. and the length of a side of garden b is 12 ft. find the lengths of all sides of the triangular gardens and find the areas of

compare the organizational and procedural process needed to manage information in a small business and medium business and a large global business

59. ## chemistry

how many grams of ethenol do i need to burn in excess oxygen in order to recover 5.0 g of h2o in a 75% yield

60. ## chemistry

How many milliliters of 1.9 M HCl must be transfered from a reagent bottle to provide 24 g HCl for a reaction?

61. ## Math EASY

Say that I saw my mark in gym. I am at 83% right now. In the following last 2 days before the term ends, I get 3/5 and 5/5. What percent (grade) am I at right now?

62. ## Spanish!!

Can You Check My Answers?? Questions:: 1.¿Qué enciendes cuando tienes calor? 2.¿Qué apagas cuando tienes frío? 3.¿Qué usas en tu cama cuando hace frío? 4.¿Dónde están las cosas muy frías en tu cocina? 5.¿Dónde está tu ropa? 6.¿Qué hay en

63. ## physics

in 35s, sam lifts his 8 kg case from the floor to .8m above the ground (in his arms) carries it 24m across the room(at the same height), and puts it on a conveyor belt 1.8 m above the floor. at this point, the machine raises the bag 13 more meters in a

64. ## history

a. Which statement about the Ku Klux Klan during Reconstruction is NOT true? 1. Southern governments never created policies that resulted in the arrest of members. 2. They attempted to stop blacks from using their right to vote. 3. Blacks and whites who

65. ## chemistry

f you have 150 milliliters of water and it freezes, how many grams of ice do you have?

66. ## chemistry

f you have 150 milliliters of water and it freezes, how many grams of ice do you have?

67. ## Precalc

Solve for x log[1/3](x^(2) + x) - log[1/3] (x^(2) - x) = -1 Steps too please. so far I tried this and I got 3 = (x+1) / (x-1)

68. ## history

a.Which statement about lynchings in the South in the 1890s is true? 1. Lynchings decreased compared to the Reconstruction era. 2. Leaders of lynch mobs tended to come from the wealthy ruling class. 3. Lynchings and acts of violence against blacks

69. ## Maths

1/3[22(x-8)+1=19.Show working

70. ## Calculus

Consider a car whose position, s, is given by the table (s) 0 0.2 0.4 0.6 0.8 1 (ft) 0 0.3 1.4 3.8 6.5 9.6 Find the average velocity over the interval 0

71. ## Costs and Awards

Find two programs that interest you at Education Planner and complete the chart below for each program. Hint: After searching for your programs (in the search engine at the top of the webpage), under the Planning Information section on the left side of the

72. ## Chemistry

The order is given for an injection of 120mg of x and 10mg of y. On the shelf you have 50mg/mL of x and 75mg/mL of y. what will be the total volume in your syringe?

73. ## Math

A 26 inch ribbon is cut into three pieces. One piece is 12 inches. The remaining two pieces must have one piece two inches longer than the other. How long is the shortest piece of ribbon?

74. ## English

Can you please check these sentences about Hamlet? Thank you. 1) Hamlet wonders whether he should make a stand against his sea of troubles or leave things as they are. 2) He believes that both active and passive resistance is bound to meet failure. 3)

75. ## Chemistry

Ok this is my last hope, I totally don't get this question. Suppose you have one beaker of H2O at a certain mass and temperature and another beaker of H2O at a different mass and temperature. You then pour these two beakers into one separate beaker. How do

76. ## English

I forgot to include the following sentences. Can you check them please? Thank you 1) The medieval perspective of death, which saw death as a liberation from the prison of the body is countered by the Renaissance one, which was doubtful about (?) the

77. ## Exponents

x^(-2) = 9 solve for x Steps too I first squared the x on both sides and I was left with x^(-1) = -3,3 but then what would the answer be for x? the answer is supposed to be 1/3, -1/3 but I don't know why

78. ## English

How does this quotation - Man's best possession is a sympathetic wife - by Euripides (484 BC - 406 BC), Antigone relate to A Street Car Named Desire by Tennessee Williams and Death of a Salesman by Arthur Miller

79. ## Spanish

1. Me gusta hablar por teléfono. _______ a. Soy trabajador b. Soy callado c. Soy sociable d. Soy antipático C? 2. Jaun no es serio. Es ______. a. paciente b. atrevido c. gracioso d. prudente C? 3. Rosa es atrevida, no es ____. a. prudente b. callado c.

80. ## Chemistry

Given the reaction system; 2 NO (g) + O2 (g) -> 2 NO2 (g) Write a brief explanation for each of the following statements in terms of the collision model and/or reactions mechanisms. (1)Increasing the concentration of NO (g)makes the reaction go faster.

81. ## Pyschology

Provide an example of how one domain of development affect or impact the other two domains

Experimental Procedure, Part F. A 1.0- mL volume of 0.010 M H2SO3 is added to a mixture of 12 drops of 0.01 M HIO3, 8 drops of deionized water, and 1 drop of starch solution. A color change in the reaction mixture occured in 40 seconds. a. Assuming 25

83. ## English

How does the quotation -A lie told often enough becomes the truth- by Lenin relate to A Street Car Named Desire by Tennessee Williams and Death of a Salesman by Arthur Miller

84. ## Math

Two Boats left the harbour at the same time. One travelled at 10km/h on a bearing of N47°E. The other travelled at 8km/h on a bearing of N79°E. How far apart were the boats after 78 mins? Round the distance to the nearest tenth of a kilometer. Use

85. ## algebra

write an inequity in terms of x for no less than $8,000 and no more than$12,000

86. ## algebra

polynominal An appliance company sells x machines total revenue R in dollars, given by polynominal R=221.19x-0.2x^2. What is revenue from sale of 273 machines. I do not know what I am suppose to multiply first. Please help.

87. ## PHYSICS NEED HELP FAST

someone spinns with an angular velocity of 4.55rad/s with arms held out. his rotational inertia is 2.7kgm^2. whn the he pulls his arms in his angular velocity increases to 7.60rad/s. what is his rotary ek?

What are the advantages of an organization existing as a single business entity?

89. ## physics

A clump of soft clay is thrown horizontally from 30.63 m above the ground with a speed of 30.0 m/s. Where is the clay after 3.8 s? Assume it sticks in place when it hits the ground

90. ## PHYSICS NEED HELP FAST

someone swings down pendulem and rescue the lady in distress by grabbing her. inelastic collision at the equallibrium point o fthe pendulem. his mass is 90kg her mass is 50kg. what is the masimum height of the oppsite legde that he. he is standing on a 10m

91. ## English

In what way does Roger Ebert do his criteria in Harry Potter and the Sorcerer’s Stone? I know that an effective evaluation is that the writer explains the criteria on which he or she bases the evaluation. In what ways does ROGER EBERT do this?

92. ## STUDY UNIT: MAIN IDEAS

Both Greta and Fred were on the bus that arrived in Pittsburgh. Fred was glad to be home. He looked forward to visiting with old friends. Greta, on the other hand, dreaded seeing her old boyfriend. She already missed her days in New York City. 2. What can

93. ## engineering

How fast can a Farrari FXX go?

94. ## Health

I need an example of a health fraud item/ product. I need to find one product that has health fraud and that I can write 150 words about. I tried searching on google but cant find anything/ don't know what to search. do you know of any products? thanks

95. ## chemistry

convert 4.37 moles of NaOH to grams.

"Most Americans would follow a thinker rather than become one themselves." Please help me explain that sentence, and also give me examples!!!who is a thinker?? in what situation do they follow the thinker, and why????

97. ## PHYSICS NEED HELP FAST

A 5kg bullet fired from a gun at 725m/s becomes embedded in a .50kg block of wood that is free to move along a surface and the coefficient of friction .355 between the surface and block of wood. find the distance it slides acroos the table.

98. ## Chemistry

8.76g of aluminum sulphide is added to 0.0350L of 0.250mol/L lead(II)nitrate solution. calculate the maximum mass of precipitate, PbS that can form

99. ## enginireiring

How fast can a Farrari FXX go?

100. ## Human Geography

I have to make a list of five different names of settlements, rivers, hills, subdivisions, or any other features in the landscape of my home region which I have done: -Frenchman Bay, Altona Road, Petticoat Creek, Rouge Valley and Liverpool next I have to

101. ## Government high school

A G.P has 6 terms. If the 3rd and 4th terms are 28 and -56 respectively,find: (a) the first term (b) the sum of the G.P

102. ## French

Hi, all! I'm trying to right a small and simple paragraph in french. This is what I'm trying to say: Yesterday, I read an article "Skills and Accuracy in Criminal Profiling" by Richard N. Kocsis in English. I liked it a lot because law is my favourite

103. ## Algebra 1

In 1920 the record for a certain race was 45.1 sec. In 1960, it was 44.3 sec Let R(t)-the records in the race(t)=the numbeer of years since 1920. Thank you for your help.

104. ## Math

Use factorization to simplify the given expression in part (a). Then find the indicated limit in part (b). (a) 3x3 + 9x2 + 9x + 3 x4 + x3 + x + 1 (b) lim x → −1 3x3 + 9x2 + 9x + 1 x4 + x3 + x + 1

105. ## Anthro/Soci/Psych

What is "material pop culture"? I am supposed to write a question on my exam that explains how Canada has a culture through multiculturalism, social insitution and material pop culture thanks!

106. ## Algebra 1

Write an equation of the line containing the point and perpendicular (4,-8);2x+5y=4. I still don't get it. I really appreciate your help.

107. ## Anthro/Soci/Psych

I also have to write a question for my exam on "is it appropirate for social sciences to use the word 'abnormal' with mental illnesses. Explain" I just need help with comming up with points i was going to say no becauae -it is just like any other illness

108. ## probability and statistics.

So here I am trying to do my prob/stat homework and I keep coming across this word that I don't understand. The word is "inferior". My book has no glossary and I cannot find a definition that makes sense.Can somebody help me understand?

109. ## physical science

A system gives off 196 kJ of heat to the surroundings and the surroundings do 4.20 x 10³ kJ of work on the system. What is the change in internal energy of the system?

110. ## Precalc

2^(x) = 0 what should x be to get 0?

in order to meet graduation requirements a student must demonstrate all of these traits except for.. -being able to pass a physical test -having sound nutritional habits -understanding emotional health management -making postive health choices Would it be

112. ## trig

convert to degrees, minutes and seconds 3pi/2 radians can u plz help

113. ## PHYSICS NEED HELP FAST

A 5kg bullet fired from a gun at 725m/s becomes embedded in a .50kg block of wood that is free to move along a surface and the coefficient of friction .355 between the surface and block of wood. find the distance it slides acroos the table

114. ## algebra 2

2X^4-9X^3+3X^2-X-5=0 Given that one root is 2+i, solve the equation. So far I have it set up like this: 2X^4-9X^3+3X^2-X-5/X^2-4X+5 I don't know how to get the answer, I know that I have to use long division but when I started to try it I kept getting

115. ## Math

Rupert flew 3/16 of the way around the world but George flew 4/9 as far as Rupert. How far around the world did George Fly?

116. ## math

a farmer needs to buy fencing to go around his garden. The garden is a 20 by 15 rectangle . How much fencing will he need?

117. ## math

what is the percent of 3 over 8?

3-2x+4=21

119. ## Precalc

How to solve for x: 2^(2x) + 2^(x) -12 = 0 Steps too I tried solving this but I ended with ln(12) / 2ln(2) + ln(2) but the real answer is supposed to be ln(3) / ln(2) or 1.585

120. ## spelling

brother:mother::fly:?

121. ## Gym

how do you get 24 by using numbers 1-12 by going up,down,and diagonal and by using addition

181. ## gr.10 History

What were Robert Laird Borden's successes, failures and overall view of Canada? I know that he was the most successful Prime Minister,and I also know that he adopted conscription, and he was indispensable to the war effort. I don't know what his failures

182. ## Chemistry

What will be the final temperature of the water in an insulated container as the result of passing 6.00g of steam at 100.0 degrees Celsius into 100.0g of water at 24.0 degrees Celsius?

183. ## ap physics

a man is on the ground level on a compressed spring. the man has a mass of 60kg and the spring is compressed 0.5 and has a spring constant of 500n-m. a)what is the maximum height will the man achieve and the spring decompresses? B)find the velocity right

184. ## U.S history

Analyze Wilson’s attempt to forge a peace based on his Fourteen Points and explain why developments at home and abroad forced him to compromise.

185. ## Career Plans

Does this make sense? My Plan A is to do something with geology. I take deep interest in learning about Earth's structure and about the universe. Exploring and discovering solution connecting with earth would be very intersting. I would somewhat be able to

186. ## Bobpursely

Bobpursely would you mind looking at my physics post. Just provide me with the formulas.

187. ## Calc.

Evaluate the definite integral. S b= sqrt(Pi) a= 0 xcos(x^2)dx I'm not sure if this is right? u= x^2 du= 2xdx du/2= xdx S (1/2)cos(u) S (1/2)*sin(x^2) [0.5 * sin(sqrt(Pi))^2] - [0.5 * sin(0)^2] 0 - 0 = 0, so zero is the answer?

188. ## history

how do religions having common geographical origins tend to share somewhat common codes of behavior and view of the nature and reason for existence?

A man with mass m =96.4 kg (weight = 212.1 lbs is walking towards a patio at 2.00 m/s (4.47 mph) when, at the last moment, he realizes the sliding glass door is closed. He puts out his hand suddenly to stop himself, and comes to a halt in 90.0ms. Find the

190. ## physics

The max speed of a 3.1 kg mass attached to a spring is .68 m/s and the max force exerted on the mass is 11N. What is the amplitude of motion on the mass? What is the force constant of the spring? And what is the frequency of oscillation?

191. ## MATH

10*9*8*7*6*5*4*3*2*1 = 10! Can this be true?! Why or why not? Im totally confused with this. Miley would like your help, please and thank you

192. ## physics. need help fast

A 5kg bullet fired from a gun at 725m/s becomes embedded in a .50kg block of wood that is free to move along a surface and the coefficient of friction .355 between the surface and block of wood. find the distance it slides acroos the table.

193. ## math

Rectangle ABCD is 12 inches long and has a perimeter of 54 inches. Rectangle LMNO is similar to rectangle ABCD and is 2.4 feet long. What is the width of the rectangle LMNO?

194. ## math

write an equation that represents the problem.The automatic tennis server holds 110 balls that shoot out one at a time.Andres 3 friends took turns hitting 27 balls each.Andre hit the remaining balls.How many balls did Andre hit?

195. ## Math

2 mi.x _ = _ ft.?

196. ## physics

What is the resistance of 6.2mi of copper wire with a diameter of 0.57mm ? The answer is suppose to be in Kohm for the resistance i got 656.9 ohm but don't know how to convert it in to kohm

197. ## Algebra

Solve for w. 8-(3/w+1)=(7/w+2)

198. ## MATH

HOW MANY 1FT TILES ARE NEEDED TO COVER A 15FT BY 25 FT PATIO

199. ## Chemistry

For a solution that is 0.20 M HCN(aq) with a Ka=4.9x10^-10 a. calculate the [H+] b. calculate the [OH-] c. what's the pH? Please show your work on how to solve it. Thank you

200. ## Math help once again

y = log x If y = 10, then what is x? How do I figure this one out? Miley is confused.

201. ## physics

A Corvette, initially traveling at a speed of 6 m/s, speeds up (accelerates) at a rate of 0.2 m/s2 for 3 s. How far does it travel during that time? I tried d=vi*t-.2*t^2 but I did not get the correct answer

202. ## Photography

Suppose you have three negatives: an over-exposed one, an under exposed one, and a correctly exposed one. Which would require the longest exposure during contact printing?

203. ## math

hey, this is my first time using this site so I'm not sure what I'm doing exactly! So i need a REALLY simple way how to convert fractions into a percent! i be confused!! :(

204. ## physics

The anchor shackle supports a cable force of 600 lb. If the pin has a diameter of 0.25 in., determine the average shear stress in the pin.

205. ## Physics

Two blocks are arranged as shown. The pulley can be considered to be massless, and friction is negligible. M1 is four times more massive than M2. M1--->0(Pulley) V V (down direction) V M2 If the system is released from rest, how far will M1 travel in 0.523

224. ## Algebra 2

Can you please help me simplify this problem? It probably is an easy problem but I do not understand the way my teacher taught it. 1/ [1+(1/ x-2)]

225. ## math

a school production ended at 8:06 p.m. the production lasted 1 hour 32 minutes.at what time did the production begin?

226. ## English

Which is correct? You should never believe ( these kind, these kinds ) of stories. Think the correct answer is ( these kinds)

227. ## MATH

STATE THE SLOPE AND Y-INTERCEPT OF THE EQUATION 5X-2Y=-10

228. ## English

Which is correct? You should never believe ( these kind, these kinds ) of stories. Think the correct answer is ( these kinds)

229. ## math

3.4 + (5x-1.7) for x=2.2

230. ## Chemistry 2

An aqueous solution has a vapor pressure of 81.1 at 50 . The vapor pressure of pure water at this temperature is 92.6. What is the concentration of in mass percent?

231. ## algebra

a motorboat can maintain a constant speed of 11 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 21 minutes; the return trip takes 1 minutes. That is the speed of the current?

232. ## math

my teacher gave me exam review booklets and there is something i don't understand.. the question is : Find the slope of a line that passes through the points (-9,-3) and (-7,-1). if someone can please explain to me how to solve this it would help majorly !

asked by HELP exam review !
233. ## lit

i need chapter summaries of the book The Quiet American by graham greene

234. ## Math

A refrigerated truck leaves a rest stop traveling at a steady rate of 56 mi/h. A car leaves the same rest stop 1/4 h later followinf rhe truck at a steady rate of 64 mi/h. How long after the truck leaves the rest stop wil the car overtake the truck. In

what is 2z^2

236. ## Geometry

The area of a circle is 72pi. What is the circumference?

237. ## Spanish

18. ________ ¿tocas la guitarra? a. Miguel b. Juan y Carlos c. Felipe, Ana y Barbara d. Señora Carreras A? 19. Me gusta ir a las cuatro y _______ a. cuarto b. cuarta c. quinta d. séptima I don't really understand this one.. 22. ¿Qué quiere hacer ____

i need help with fraction 3/5-3/15= ? PLEASE SHOW ME HOW TO DO THIS PROBLEM,THANKS!!

239. ## Geometry

The diagonal of a rectangle is 24 inches. The width is 15 inches. What is the area?

240. ## Chemistry

The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrogen fluoride. 5 F2(g) + 2 NH3(g) N2F4(g) + 6 HF(g) (a) If you have 73.7 g NH3, how many grams of F2 are required for complete reaction? b) How many grams of NH3, are required

241. ## chemistry

What volume does a mixture of 14.2g of helium and 21.6g of hydrogen gas occupy at 28 degrees celcius and .985atm?

242. ## computers

When you press the power button on your computer, it doesn’t turn on. There is nothing…silence…absolute zero. There are no beeps, no whistles, nothing. The monitor is getting power and the power strip is turned on. 1.Draw a diagram of the wiring

243. ## algebra

Suzies flower shop estimates that supplies cost for one month will be given by the polynomial 3x^2+7x-3. She estimates the utilities costs for one month is given by 5x+2 Find and simplify an expression that would estimate suzie's total cost for one month.

244. ## math

find the difference (6x^2-3x-9)-(2x^2+8x+3)

245. ## physics

a hockey puck rebounds from a board. the puck is in contact with the board for 2.5 ms. dertermine the acceleration of the puck over the time interval. V(i) = 26 m/s...at angle of 22 degrees. V(f) = 21 m/s...at angle of 22 degrees. a=?

246. ## Chemistry

Calcium carbonate reacts with phosphoric acid to produce calcium phosphate, carbon dioxide, and water. 3 CaCO3(s) + 2 H3PO4(aq) Ca3(PO4)2(aq) + 3 CO2(g) + 3 H2O(l) How many grams of phosphoric acid react with excess calcium carbonate to produce 3.47 g

247. ## physics

how much energy was released by a 60 kg cannon shooting an 8 kg projectile horizontally at 50m/s?

If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.27 kg SO2 reacts with an excess of CaCO3 and O2? 2 CaCO3(s) + 2 SO2(g) + O2(g) 2 CaSO4(g) + 2 CO2(g)

249. ## Chemistry

An unknown element Q has two known isotopes: 61Q and 62Q. If the average atomic mass is 61.4 amu, what are the relative percentages of the isotopes?

250. ## UsHistory

"The individual can be free only when the power of one governmental branch is balanced by the other two" Baron de Montesquieu, 1735 This idea is best illustrated by which aspect of the US government?

251. ## Chemistry;

for a solution of the weak base, 0.075 M ethylamine C2H5NH2(aq), the hydroxide ion concentration (OH-) is 6.6x10^-3 M. Assume that temperature is constant and volumes are additive. a. Write the equilibrium dissociation equation. b. What's the pH of 0.075 M

Will Na2CrO4 react exactly the same as Na2CrO7 when mixed with Pb(NO3)2

253. ## Math

How do I figure out the GCF and the LCM of these three numbers 10-55 and 45

254. ## English

How many adjectives are in this sentence? That glossy, red apple rolled out of the grocery bag and across the smooth table.

255. ## physics 2

1)what potential differences must be applied across across a 1500 resistor in order that the resulting current be 50.mA?

256. ## MAth

Find the critical numbers, increasing intervals, x-values where f has an inflection point, and where the graph is concave down from the equation f(x)=2x^4-3x^3-10x^2+20

257. ## English

I know this because, a student told me that the whole class likes working in pairs or groups. Is this sentence correct or should it have this ; after because

258. ## mass to grams

A hummingbird has a mass of 5.90×10−3 {\rm kg}. What is the mass of the hummingbird in grams?

259. ## english

What is the main idea of the shepards daughter

260. ## math

Mr. Miller teaches a class with 15 boys and 5 girls. If he randomly chooses a student from the class, what is the probability that the student chosen is NOT a boy? A) .25 B) .33 C) .50 D) .75

261. ## algebra

write each square as a trinomial: (-11t^2 - 2)^2 (22t^4 + 44 + 4)

262. ## chemistry

A crystalline material containing 30 grams of barium chloride crystals was placed into an oven at 400 degrees c and heated for two hours. It was then cooled and weighed. the new mass was less than before it was heated, containing 20 grams if barium

263. ## Calc.

Evaluate the indefinite integral. Please check my work? Not sure if I am doing this correctly. S= integral symbol S x^3*sqrt(x^2 + 1) dx u = x^2+1 x^2= u - 1 du = 2xdx du/2 = xdx 1/2 S x^2 * x sqrt (x^2 + 1) du 1/2 S (u - 1) * sqrt (u) du multiply square

264. ## physics, I'm stuck

In an aortic aneurysm, a bulge forms where the walls of the aorta are weakened. If blood flowing through the aorta (radius 1.0 cm) enters an aneurysm with a radius of 2.5 cm, how much on average is the blood pressure higher inside the aneurysm than the

265. ## Statistics

Given a mean of 60 and a standard divation of 7, what percentate of scores ae 73 or less? What is the formula for determining this value?

266. ## Chemistry!

1. Write balanced equations for each of the following processes. a. Chromium- 51, which targets the spleen and is used as a tracer in studies of red blood cells, decays by electron capture. b. Iodine-131, used to treat hyperactive thyroid glands, decays by

267. ## Statistics

Given a mean of 60 and a standard divation of 7, what proportion of scores is between 45 and 78? What is the formula for determining this proportion?

268. ## english

Is it self-monitor or self monitor

269. ## algebra

decide whether each trinomial is a perfect square. if so, factor it. x^2 - 4x + 4 how do i solve this?? i don't understand the method..

270. ## Algebra

can someone show me how or explain to me how to get the slope of 2x +3y=7

271. ## algebra

what is the inverse ƒ(x) = x2 - 9

272. ## math

Where does the graph of x2 - x - 2 = y cross the x-axis?

273. ## math

Where does the graph of x2 - x - 2 = y cross the x-axis?