# Questions Asked onMarch 22, 2009

1. ## Physics--Pressure

a house at the bottom of a hill is fed by a full tank of water 5m deep and connected to the house by a pipe that is 110m long at an angle of 58 from the horizontal. a) determine the water gauge pressure at the house b) how high could the water shoot if it

2. ## chemistry

Can someone please explain the behavior of HCl/NaOH mixture as to why it started bubbling/dissolving when combined with Mg and with NH4Cl and why when blue litmus paper was dipped in the HCl/NaOH mixture it turned red. Also can someone explain the correct

3. ## physics

As shown below, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the minimum value of v such that

4. ## precal

A 20-foot ladder makes an angle of 62 degrees with the ground as it leans against a wall. How far up the wall does the ladder reach?

5. ## physics

Water falls without splashing at a rate of 0.220 L/s from a height of 2.20 m into a 0.720 kg bucket on a scale. If the bucket is originally empty, what does the scale read 3.20 s after water starts to accumulate in it? The answer is supposed to be in

6. ## Math

A shoe box is an example of what geometric solid?

7. ## chemistry

The enzyme Y catalyzes the elementary reaction AB-->A + B An enzyme concentration of 1.0M Y can convert a maximum of 0.5M AB to the products A and B per second. What will happen when each of the following is added to a solution that contains 1.0M Y and

8. ## statistics

The mean of a normal distribution is 400 pounds. The standard deviation is 10 pounds. What is the area between 415 pounds and the mean of 400 pounds? The area between the mean and 395?

10. ## Chemistry

Decide which of the substances listed can form hydrogen bonds? H20 H2O2 HF NH3 NaF H2 NO CH4

11. ## Chem problem- percent yield

Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron(II) sulfide. Sb2S3 (s) + 3Fe(s) ¨ 2Sb(s) + 3FeS(s) When 15.0 g Sb2S3 reacts with an excess of Fe, 9.84 g Sb is produced. What is the percent yield of this

12. ## chemistry

Can someone please explain the behavior of HCl/NaOH mixture as to why it started bubbling/dissolving when combined with Mg and with NH4Cl and why when blue litmus paper was dipped in the HCl/NaOH mixture it turned red. Also can someone explain the correct

13. ## physics

A rod of length 39.0 cm has linear density (mass-per-length) given by the following equation, where x is the distance from one end. ë = 50.0 g/m + 21.0x g/m2 (a) What is its mass? (b) How far from the x = 0 end is its center of mass? I think you would

14. ## History

The "Critical Period" took place during the years when... w. the United States was governed by its 1st president x. George Washington served as the 1st president y. None of these answers are correct

15. ## Physics

A 2 cm object is placed 42 cm from a screen. Where should a converging lens of focal length 7 cm be placed between them to form a clear image on the screen? What two possible magnifications could the image have?

16. ## Chemistry

If you mixed water and dilute sulfuric acid, rather than concentrated sulfuric acid, would the exothermic reaction be greater or less than the exothermic reaction that occurs during hydration of a concentrated sulfuric acid? If so, why?

17. ## Chemistry

What is meant by the hyrdration of the hydrogen ion? Does this mean you add water? Does this mean you create hydronium ions? Are hydronium ions only created when you hydrate a concentrated acid?

18. ## Fluid Mechanics

A supersonic wind tunnel is to be operated at M=2.2 in the test section. Upstream from the test section, the nozzle throat area is 0.07 m². Air is supplied at stagnation conditions of 500 K and 1.0 MPa (abs). At one flow condition, while the tunnel is

19. ## Algebra

Amy paid \$71.85 for a pair of running shoes during a 20% off sale. What was the regular price?

20. ## Geometry

To construct an angle equal to a given angle, you need a pencil and a ....?

21. ## English

1. He was shot in his left arm. 2. He shot the bird on the electricity line. 3. He shot shoulders of North Korea during the Korean War. 4. He is shooting the target on the field. 5. The country produces a variety of wheats. 6. The company produces steels.

22. ## 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

23. ## computers

Mow do you use a bookmark?

24. ## AE

I am doing a final paper on Should Teachers Have the Authority to Remove Disruptive Students from Their Classes Permanently? what can be possibly a main point.. can defining distruptive be a main point?

25. ## Algebra

Solve using the elimination method. 2x +3y = 2, 4x + 6y =4.

26. ## physics--pressure

how high would the atmosphere extend if it were of uniform density throughout, equal to half the present density at sea level?

27. ## pressure

ab open tube mercury manometer is used to measure the pressure in an oxygen tank. when the atmospheric pressure is 1040 mbar, what is the absolute pressure (in Pa) in the tank if the height of the mercury in the open tube is a)28 cm higher b)4.2cm lower,

28. ## college

Please help. I need to write a journal entry. I do not know how to even start. Is it the same as essay writing?

29. ## Physics

I've been stuck on this problem and hope someone can help me. A man is standing on scales which show his weight as 607.6 N. A .50 kg ball is dropped from a height of 1 m into his hands. His hands drop 25 cm from chest level to waist level during the

30. ## Math

I'm struggling with the equations for the following problem: a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use x to represent floor plan #1 and y to represent

31. ## Social Studies

What is the name of the group formed by three white supremacists who tried to run Georgia after the Civil War. hints - it's 18 letters long - The second letter is an O

32. ## English

1. He was shot in his left arm. 2. He shot the bird on the electricity line. 3. He shot shoulders of North Korea during the Korean War. 4. He is shooting the target on the field. 5. The country produces a variety of wheats. 6. The company produces steels.

33. ## 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

34. ## science

how hot can the sun get?

35. ## FRENCH

I just read the following in one of my books: "Je suis importateur d'objets d'art de France et du Maroc." I am wondering why it is "du Maroc" but not "de la France". Thank you for your explanation.

36. ## Math

When you use this: (0,2);m=4/5 and write it in point-slope form, does it become (y-2)=4/5(x-0)?

37. ## philosophy

i am writing a paper on eminent domain and apply the moral theory act ultilitarianism to the case. help having a hardtime starting off.

38. ## math 116

-x/9=1/16 This is suppose to be solved using the multiplication principle. If possible please show me not just the answer but how you came up with it so I understand how to do these problems. Thank you

39. ## Physics

IMAGE: img7.imageshack.us/img7/4994/lenses.png Do I use the image distance from one mirror as the object distance from the next mirror?

40. ## Math

When you use this:(4,0);m=1 and write it in point-slope form, does it become y=(x-4)?

do the moon rotates around the sun?

42. ## Math

Is it possible to use these points: (4,-2),(9,-8) and write an equation in slope intercept form, without first writing an equation in point-slope form, and then rewriting it to slope-intercept form?

43. ## psy

In what stage of development is Michael in and what factors about this stage might be impacting his perspective of this situation?

44. ## Stoichiometry

6 NaOH + 2 Al ---> 2 Na3AlO3 + 3 H2 How many moles of NaOH are required to produce 3 g of hydrogen?

45. ## Social Studies

How did interchangeable parts transform the manufacturing process in the industrial revolution?

46. ## English!!

Hi!! Do I need to take the word, "now" out in the sentence below?: Mouschi, Peter Van Daan’s cat, has been missing for several months now. (Or should I just leave the word, "now" there?) Please Help!! Thank You!!

how many quarts are in a gollon?

48. ## math

to find the cordinates of the maximum or minimum point of a quadratic relationship?

49. ## Algebra

Solve. 8x-(4x+5)=7 8x-1(4x+5)=7 8x-4x-5=7 4x-5+5=7+5 4x=12 x=3. Is this right?

50. ## Social Studies

This form of violence is used when two races want to hurt each other. hints - it's 9 letters long - It starts with an E

51. ## Algebra.

Solve using the addition and mulitplication method principles. 4+9x1?

52. ## English!!

Hi!! Should there be a comma before the word, "as" in the sentence below?: Everyone is waiting quietly as Mr. Frank walks to the door. Thank you for your help!!

53. ## social studies

How and why did the republicans try to undo Hamilton's financial program?

64^2/3

55. ## Algebra

collect the like terms. 11u+4v-8u-9v? Is 19u+5v right?

56. ## Russian Literature

I have to write out a thesis and outline about how Russians view American medical technology/advancements/procedures/doctors. I have no idea how to start this and how to prove my topic. Here is the magic thesis statement: By looking at ________, we can see

32^2/5

58. ## English!!

Hi!! Does this sentence need a comma after the word, "Mouschi"?: Everyone is now relieved that it is only Mouschi, and not the Green Police. (Or does it not need a comma?) Please help!! Thank you!!

59. ## Algebra

How do I solve by the substitution method? 7x +6y=13 x= 35-5y. I need help figuring this out.

60. ## Chemistry

How many moles of sodium chloride must be added to an aqueous solution that contains 2.0 moles of silver nitrate in order to precipitate 0.50 moles of silver chloride? A) 0.25 mol B) 0.50 mol C) 1.0 mol D) 2.0 mol E) 1.5 mol The answer is B. I have no idea

61. ## English

Why do young people sometimes put themselves at risk? What are three things young people can do to reduce risks and avoid injury? What risk-reduction strategies would work well for you?

62. ## FUND OF BUSINESS LAW

Facts: Frank owns a well-known restaurant in downtown Milwaukee within easy walking distance from the city's convention center. The Organization of Chemical Research has a contract with the city of Milwaukee for the use of the convention center for its

63. ## Fluid Mechanics

A large tank supplies air to a converging nozzle that discharges to atmospheric pressure. Assume the flow is reversible and adiabatic. For what range of tank pressures will the flow at the nozzle exit be sonic? If the tank pressure is 600 kPa (abs) and the

64. ## Algebra

Is this right? Simplify 7[62-(-5-46)] 7[62-(-5)] 7+113 120

65. ## 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

66. ## Fluid Mechanics

A converging-diverging nozzle with a throat area of 2 in² is connected to a large tank in which air is kept at a pressure of 80 psia and a temperature and a temperature of 60°F. If the nozzle is to operate at design conditions (flow is isentropic) and

67. ## social studies

Sorry to keep posting, I thought I had this one figured out, however it is the last one that I have. She helped to end the Bourbon Triumvirate and pushed for Women Rights Hints - 13 letters - ends with an t _ n

68. ## Science

How were the Aleutian Islands's mountain peaks most likely formed?

69. ## Statistics

A multiple regression model has the form: As x2 increases by 1 unit, holding constant x1, then the value of y will increase by: ^ is over y = 5.25 + 2.5x1 + 4x^2 A) 2.5 units B) 7.75 unit C) 4 units on average D) 11.75 units on average

70. ## Statistics

When the purpose of sampling is to detect when a process becomes too variable, the chart of choice will be an R chart. True False I picked True.

71. ## MATH

4217.9 ROUND TO TWO DECIMAL PLACES

72. ## Physics

Find the angle of refraction if there is one. If there isn't, tell which substance reflects the light: n=1.36 ~~~~~~~~~~~Angle=15.60 degrees n=1.73 ~~~~~~~~~~~Angle=17.94 degrees n=1.51 ~~~~~~~~~~~Angle=27.71 degrees n=1.0003 ~~~~~~~~~~~Angle=11.08 degrees

73. ## Statisitics

When the purpose of sampling is to detect when a process becomes too variable, the chart of choice will be an R chart. I picked true on this? True False

74. ## Statistics

If a point is more than 3 sigmas away from the centerline, or if two out of three consecutive points are on the same side of the centerline and more than 2 sigmas away from it, the process is deemed to be in control. True False

75. ## french

we are learning about the passe compose, and about using irregular verbs like voir and lire, so do we just have to memorize the irregular verb forms? will -er verbs always end with an "e" with an accent mark? merci!

76. ## Statistics

When no point lies outside the control limits of a chart, we conclude that: A) variation in the process is caused by assignable causes and there is enough evidence to infer that the process is in statistical control. B) variation in the process is caused

77. ## Statistics

Much of the emphasis in TQM is an understanding and reducing variation within the process through which the product is produced, and samples of output are used in reaching inferences about the stability of the process. I choose True. True False

78. ## Algebra

How do I solve -22

79. ## Chemistry Lab+Help

Okay, basically what we did in the lab was fill up an empty soda can with about 5mL of water, and we had to heat it up to a boiling point. After that we turned the soda can upside down into a beaker with cold water. After a minute or so, the can just

80. ## grammar

Hello, I need a grammatical correction in the following excerpt from my essay, "We can see the benefits of having a husband for a woman in the following excerpt..." My teacher circled the phrase "having a husband for a woman" (which means that there is

81. ## To Cassandra -- Com140

Your complex post has been removed because it (1) contains references to materials that we can't access, and (2) give no clue about what you do and don't know about this assignment. Please note that Jiskha Homework Forum has no connection with Axia or any

82. ## Science

Are all of these true? 1. Ocean ridges are not associated with orogeny at convergent boundires. 2. At a convergent boundary involving two oceanic plates, you would expect to find a fault-block mountain. 3. Convergent plate boundaries are most often

83. ## Algebra

Solve. -0.1x < -4. The solution is { x| }.

84. ## Math

how do you factor 2x^2-3x+1

85. ## AP Calculus

I need help with Volume of Revolutions. The question is: Find the volume of the solid generated bt rotating about the designated line the region bounded by: 1. y= x squared + 2, x = negative 1, x = 1 about y = 1.

86. ## Fluid Mechanics

A small rocket motor, fueled with hydrogen and oxygen, is tested on a thrust stand at a simulated altitude of 10 km. The motor is operated at chamber stagnation conditions of 1500 K and 8.0 MPa (gage). The combustion product is water vapor, which may be

87. ## Pre-Calculus

Im having trouble with this. Find an equation of the tangent line to the parabola at the given point and find the x-intercept of the line. x^2=2y (4,8)

88. ## Statistics

Much of the emphasis in TQM is an understanding and reducing variation within the process through which the product is produced, and samples of output are used in reaching inferences about the stability of the process. I choose True. True False

(.6^-2)^-1/2

90. ## Algebra

Is this right? 5/4x + 1/8 x =9/8 +x 11/8x= 9/8 +x 3/8 x = 9/8 x= 3

91. ## Algebra

Is this right? 9x- 7y= -14 7y - 9x = 14. It is going to have a point. It is going to be consistent. And it is dependent.

92. ## Science

If I use a measuring cylinder to measure 55cm3 of water, what is the degree of accuracy of my measuring cylinder?

93. ## Geometry

A part of a circle bounded by an arc and a chord is..?

94. ## science

Do clown fish encounter problems in its habitat?

95. ## algebra 2

how do i find the radical notation of 25 -1/2?

97. ## Role of the Media

can you give me an introductory paragraph and facts?

98. ## Chemistry

When HCl reacts with Na2CO3, what is created? More specifically, what are the crystals that remain? The questions that I need to answer: 4) What is the shape of the crystals of the product? 5) Have you seen crystals like these before, where? I wasn't able

99. ## English

I need help writing my introduction... I have to write an argument paper...

Describe the business reasons to limiting monitoring . Also, explain how monitoring causes stress in the workplace.

101. ## Algebra

Please factor the following expression: x^2-48x-100

102. ## Science

I'm trying to hypothesize what caused a fishkill. Is it possible that chemicals can raise the temperature of a river?, causing lower oxygen levels? This seems a bit far-fetched, but I'm wondering if this could happen. Thank you.

103. ## college statistics

The mean of a normal distribution is 400 pounds. The standard deviation is 10 pounds. What is the area between 415 pounds and the mean of 400 pounds? The area between the mean and 395?

104. ## Chemistry-simple explanation needed

How do you explain why ionic compounds are generally soluble in water without using the term "polar solvents"?

105. ## college algebra

Buying and selling land. Anoa bought two plots of land for a total of \$120,000. When she sold the first plot, she made a profit of 15%. When she sold the second, she losT 10%. Her total profit was \$5500. How much did she pay for each piece of land.

106. ## English

I need an activity idea for teaching future perfect continuous? Any ideas please.

107. ## English

Ooops sorry make that two ideas for teaching future perfect contiuous. If anybody can help?

108. ## physics pre-lab

By trial and error with your calculator, find the angle theta for which sin theta and theta differ by 5%. This calculation must be done in radians. When you have found theta, express it in degrees. plzzz help thanx

109. ## Chemistry-help-thanks

Ethanol is an organic solvent. In general, will it dissolve ionic compounds?

110. ## math

from a base elevation of 8500 ft, a mountain peak in colorado rises to a summit elevation of 14595 ft over a horizontal distance of 15842 ft. find the grade of the peak.

111. ## Algebra

The length of a retangle is fixed at 21 cm. What widths will make the perimeter greater than 76 cm?

112. ## FDR+OBama

Do you see any similarities between FDR and Obama as leaders? What about similarities between the economic challenges faced then and now? Compare and contrast the two presidents and their responses to economic issues during their administrations. Well, I

113. ## math

4/9 +1/3 7/8 + 1/16 9/10 + 1/15 11/12-7/12 4/5 -2/5 3/8-2/8 7/8-1/16 5/8-1/3 5/7-1/3

114. ## 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

115. ## Social Studies

I'm doing a project on immigration, which group do you think would be most intersting? Which should I choose? The English The Germans The Italians The Irish The Africans The Japanese The Chinese The Jewish

116. ## Chemistry

Is sulphuric acid covalent? Please explain. Thanks.

117. ## Torque and shear stress

A solid shaft of 65mm outside diameter and a hollow shaft of 85mm outside diameter are connected by 6 bolts with the mean pitch of thread being 155mm. The shear stress due to the torque on the shafts is equal to the shear stress on the bolts. a) Find the

118. ## Chemistry

Which liquid is more viscous at room temperature water or molasses? explain

119. ## Language Arts

Riddle: I'm a 10 a 3 yet I'm 1, people fear me yet,they use me everyday. I'm silent yet loud, yet I'm a mute. Sometimes confused,I'm very clear under light. What am I ?

120. ## Religion

Is there a certain age you should be when you give thing up for Lent or should you give something up at any age?

121. ## mat115

Use the world population and land area table. What was the population per square mile of Oceana in 2000?

122. ## Algebra

The equation y= -1777x + 27,153 can be used to predict the number of gun deaths in the United States x years after 2000, that is x=0 corresponds to 2000, x=2 corresponds to 2002, x=5 corresponds to 2005, and so on. Predict the gun deaths in 2005 and 2007.

123. ## Cultural Diversity

What are two characteristics of Orientalism?

124. ## Environmental Studies

I am trying to find the EPA standards for the maximum amounts of phosphate per liter of water. I went on their site, but I couldn't find it. Could anyone find out for me? THank you

125. ## Algebra

Solve by elimination method.. 3r - 5s = 14 5r + 3s = 46.

9x^2-27y2

127. ## Chemistry

Is fertilizer usually basic or acidic? I'm referring to fertilizers that contain nitrates, phosphates, and arsenic. Thanks for investigating this.

128. ## social studies

Hi. In my class we are in the Plessy V Ferguson case. I need to write a paragraph on how the decision of this case helped African Americans gain more. I am confused on the decision. In my text book, it reads "The majority rejected the argument that

129. ## English

Find the student who looks sad. Find a student who looks sad. (Which one is correct and common?) How does Junsu look? He looks sad. Do you know why? Yes, I do. He got 100 points in English. He got 60 points in math. He got the best points in

130. ## Math

How many ways can 6 people line up for a race. This is is a combination, but I do not know how to solve it. Help is appreciated.

. Which of the following activities would be a part of a manager’s leadership function? (Points: 1) Devising a new strategic plan to compete in an established market by introducing radically lower prices. Recruiting qualified workers to join the

132. ## science

how many times the earth travels around the earth?

133. ## Algebra

Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 80 mile per hour and train B is traveling at 88 miles per hour. Train A passes a station at 9:20 P.M. If train B passes the same station at 9:50 P.M., at what

134. ## other

when do u get out of school 4 summer

135. ## math

a ball balances nine 10-gram masses and three 5-gram masses. what is the mass of the ball?

136. ## chemisrty

a 445 g sample of ice at -58 degrees celcious untill its temperature reaches -29 degrees celcius. find the change in heat content system

137. ## Math/Algebra

Could someone please help me with this problem. I posted it yesterday but the teacher who tried to help me didn't know what I was fully talking about and I hope you can. Directions: Find the area of each shaded region in simplest form. (Imagine a medium

138. ## Algebra

In 1992 the life expectency of males in a certain counrty was 73.4 years. In 1999 it was 76.7 years. Let E represent the life expectancy in years t and let t represent the number of years since 1992.

139. ## Any

II know this might be lame, but I have to write 6-7 oage a research paper. How do I decide what topic to write on? Once I have a topic, I can usually run with it, but the decision of the topic sometimes takes up more time than I can to spend.

140. ## English

What is the dating relationship short term effects and long term effects if you can find them?? please help