# Questions Asked onOctober 7, 2011

1. ## Physics

A boat moves through the water with two forces acting on it. One is a 1500 N forward push by the motor, and the other is an 1400 N resistive force due to the water. (a) What is the acceleration of the 1100 kg boat? m/s 2 (b) If it starts from rest, how far

2. ## Chemistry

The bond in O2 is shorter than the O-O bond in compounds that contain an O-O single bond. Explain this observation.

3. ## Physics

The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground some

4. ## chemistry

Finding molarity and molality(best answer)? An aqueous solution is prepared by diluting 3.30 mL acetone,(d= 0.789g/mL) with water to a final volume of 75.0 mL. The density of the solution is 0.993 g/mL. What is the molarity, molality and mole fraction of

5. ## MATH: Functions

The radius, r, in centimeters, of a melting snowball is given by r=50-2.5t, where t is time in hours. the snowball is spherical, with volume V=4/3(pi)r^3 cm^3. Find a formula for V=f(t), the volume of the snowball as a function of time.

6. ## Chemistry

NaCl is soluble in water, but I2 is not. Explain

7. ## earth

Some people have proposed building a giant elevator from Earth's surface to geosynchronous orbit. The top of the elevator would then have the same orbital distance and period as any satellite in geosynchronous orbit. Suppose you were to let go of an object

8. ## physics

Two objects (41.0 and 20.8 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find the acceleration of the objects and the tension in the string.

9. ## exact differential equation

(x2-4xy-2y2)dx+(y2-4xy-2x2)dy=0

10. ## statistics

SAT Exam Scores – A school administrator wonders if students whose first language is not English score differently on the math portion of the SAT exam than students whose first language is English. The mean SAT math score of students whose first language

11. ## Chem

Epsom salts consist of magnesium sulfate heptahydrate. Write its formula. a) How many atoms of oxygen are in 5.15g of Epsom salts? b) How many formula units of the compound are present in 5.15g? c) How many moles of water molecules are in 5.15 g of Epsom

12. ## Physics

In a location in outer space far from all other objects, a nucleus whose mass is 3.57232e-25 kg and which is initially at rest undergoes spontaneous "alpha" decay. The original nucleus disappears, and two new particles appear: a He-4 nucleus of mass

13. ## English ll

I dentify the complete adj. clause. 1. Many Californians who own homes live on hillsides. A: Who own homes live on hillsides. What word does the adj. clause modify? 3. I elected totake astonomy, which is not a required course. A: Astonomy 4. This course

14. ## chem

if a fractional distillation failed to separate two components efficiently, what alternatives would one consider to effect clean separation by distillation?

15. ## College Physics

The top layer of your goose down sleeping bag has a thickness of 5.0 cm and a surface area of 1.0 m^2. When the outside temperature is -18 degrees celcius you lose 24 Cal/hr by heat conduction through the bag (which remains at a cozy 34 degrees celcius

16. ## Math

The point P(8, −3) lies on the curve y = 3/(7 − x). (a) If Q is the point x, 3/(7 − x)), use your calculator to find the slope mPQ of the secant line PQ (correct to six decimal places) for the following values of x. (i) 7.9 mPQ = (ii) 7.99 mPQ =

17. ## physics

A boat propelled so as to travel with a speed of 0.50m/s in still water, moves directly (in a straight line) across a river that is 60m wide. The river flows with a speed of 0.30m/s. How long in seconds does it take the boat to cross the river?

18. ## physics

2. A tiger jumps horizontally off of a 1.7 meter tall rock with a velocity of 3.2. How far from the base of the rock does the tiger land?

19. ## geometry

Triangle XYZ above is similar to triangle UVW (not shown). If the length of one side of triangle UVW is 60, then what is one possible perimeter of triangle UVW

20. ## Statistics and Probability

In a game of skill, a player has probability 1/3,5/12,1/4 of scoring 0,1,2 respectively and the game ends when he scores a zero. Assuming independence of trials, find the probability of the total score being 'n' when the game ends?

21. ## English

Im doing a thesis statement on GAY ADOPTION , and i wanted to know if mine was good so far.. : The majority of states (34) of them , lacks statewide legislation , case law or department regulation addressing gay adoption!

22. ## math

If the perimeter of a parallelogram is 140 m, the distance between a pair of opposite sides is 7 meters and its area is 210 sq m, find the length of two adjacent sides of the parallelogram.

23. ## math models

the length of a rectangle is 8 inches more than its width. the perimeter of the rectangle is 24inches. what are the lenth and width of the rectangle?

24. ## English II

I dentify the complete adj. clause. 1. This course deals with facts that everyone should know. 2. Many Californians who own homes live on hillsides. What word does the adj. clause modify? 3. I elected totake astonomy, which is not a required course. 4.

25. ## psychology

. Which of the following is not an early school of psychology? (Points : 1) behaviorism voluntarism nativism functionalism

26. ## Physics

A cannon ball is shot from a cannon with a horizontal velocity of 200m/s. What is the time until impact on a target 50m downrange? What is the objects horizontal velocity at impact (ignoring air resistance)?

27. ## physics

The air exerts a forward force of 10 N on the propeller of a 0.20 kg model airplane. If the plane accelerates forward at 5.0 m/s2, what is the magnitude of the resistive force exerted by the air on the airplane in Newtons ?

28. ## Calculus

A steady wind blows a kite due west. The kite's height above ground from horizontal position x = 0 to x = 60 ft is given by y = 150 − 1/40(x − 50)^2. Find the distance traveled by the kite. (Round your answer to one decimal place.) THe answer is

29. ## Chemistry

Explain why it is necessary to form a double bond in the Lewis structure.

30. ## physics

A body hangs from a spring balance supported from the roof of an elavator. If the elavator has an upward acceleration of 3m/s2 and the balance reads 50N, what is the true weight of the body?

31. ## Finance

There are various stakeholders in an organization. The two key stakeholders are the customers and the stockholders. Some financial managers believe that the customer is always right and an organization must do everything possible to win customer delight,

32. ## Chemistry

The dipole moment (mu) of HBr (a polar covalent molecule) is 0.851 D (debye), and its percent ionic character is 12.6 %. Estimate the bond length of the H-Br bond in picometers.

33. ## chemistry

The distribution coefficient of a compound between ether and water is 5.8. A student takes 1.5.g of the compound and dissolves it in 45 mL of water. The resulting solution is placed in a separatory funnel and an extraction is performed using 15 mL of

I have a foster child (my niece) who has been through a lot in the past year. She is having huge difficulty in school. She is in 1st grade. My 21 year old daughter is home with her trying her best to help her but it is getting overwhelming to get her to

35. ## College Physics

A 2.30-cm-thick wood floor covers a 4.0 m x 5.5 m room. The subfloor on which the flooring sits is at a temperature of 16.4 degrees celcius, while the air in the room is at 19.3 degrees celcius. What is the rate of heat conduction through the floor? Use

36. ## English

Could you please check these sentences? 1) I haven’t been here for long. How long have you been married? Since 1998. (Could you say: How long is it since you got married?) . 2) It’s two months since I last saw Mary. Mrs Brown hasn’t seen her son for

37. ## Fine Arts

The Hellenistic style was exemplified in A)Seasted boxer B) geometric cases C) Kouros D)Classical I said B Greek sculpture of the Classical period was characterized by? Greek sculpture of the Classical period was characterized by A)theatrical, emotional

38. ## College Physics

The top layer of your goose down sleeping bag has a thickness of 5.0 cm and a surface area of 1.0 m^2. When the outside temperature is -18 degrees celcius you lose 24 Cal/hr by heat conduction through the bag (which remains at a cozy 34 degrees celcius

39. ## English

Can you please tell me if the following phrases are possible? I really don't know if the adjetives or the school equipment is correct. 1) intolerant of albinos. 2) It is better not to be very sensitive and not to take people's comments too hard (to get

41. ## Science

1. What is the question that this study aimed to answer? State the hypothesis that you tested. I completed the lab but I don't understand what it is that I am testing. The lab had me test fragmentation at 0,25,50 and 75%.Included Spiny Grass, Blue bunch

42. ## statistics

To test H0:µ =80 versus H1:µ < 80, a simple random sample of size n = 22 is obtained from the population that is known to be normally distributed. (a) If = 76.9 and s = 8.5, compute the test statistic. (b) If the researcher decides to test the hypothesis

43. ## Chemistry

A student synthesized 6.895 g of barium iodate monohydrate by adding 30.00 mL of 5.912 x 10-1 M sodium iodate, NAIO3. 125 mL of distilled water as used to wash and transfer the precipitate, rather than 20 mL of chilled distilled water (at 4* C). The

44. ## 3rd

to the nearest ten, a jar contains 60 marbels. What is the least number os marbels that can be in the jar? What is the greatest number?

45. ## Pre-Calculus

Sorry to be a pest but I never got an answer and I'm really stuck Can you please check this equation. Find polar equation of x^2 + y^2 = 10y x^2 + y^2 = r^2 r^2 = 10sin(theta)

46. ## Science

What is a good website to find interesting facts? Can you please give several possible website?

47. ## government

What do you think of the government limiting services for medicaid holders?

48. ## algebra

What happens when you plug 1 in for x into this rational expression (x^2-1)(x-1)-x

49. ## algebra

How would you solve 3/4 x 8/9

50. ## algebra

How would you solve 7/12 divided by 7/6

51. ## algebra

How would you solve 2/3 + 5/4

52. ## nutrition and wellness

does water in the human body helps transport waste products in and out of cells

53. ## mathematics

The London eye in England is the biggest big wheel in the world. it rotates with people on it so that they can get a view of the city of London from high up. there are 32 cabins attached to the wheel that carry passengers and it takes one approximately 30

58. ## chemistry

if burning one mole of a carbohydrate generates 50 joules of heat, burning 0.2 mol(or one fifth of a mole) of that same carbohydrate will generate how many joules of heat ?

59. ## math

y*x=30 I need super help please

60. ## precalculus

if side x=15 and side y=8 what is sin of the angle.

61. ## geometry

I have 4 pairs of parallel sides and each angle is 45 degrees, what am I

62. ## chemistry

Calculate the final temperature of 289 of water initially at 35 upon absorption of 20 of heat.

63. ## Algebra

Maria bicycles 8km/h faster than Dennis. In the same time it takes Dennis to bicycle 33km, Maria can bicycle 37km. How fast does each bicyclist travel?

64. ## math

3 Normally distributed Test scores for a police exam is a normal distribution TEST,150,20. 5) Find the probability that a randomly chosen candidate’s score is greater than 165. 6) Find the cut-off score for the top 10% of test-takers.

65. ## chemistry

How do you find the molecular weight of hydrogen carbonate and the atomic weight of the unknown metal in the hydrogen carbonate?

66. ## physis

an engine was used to lift up a load of 200kg to a platform 40m high in 20sec. calculate the power out put by the engine (take g =100n /kg).

67. ## World History

What is the Minoan civilization known for?

68. ## H.W in Partial economy

Bundle** Oranges/Week ** Total Utility A 0 50 B 1 80 C 2 100 D 3 115 E 4 125 F 5 133 G 6 139 H 7 144 I 8 146 J 9 147 K 10 147 L 11 147 M 12 147 N 20 147 From the above table draw TU curve and MU curve find MU when using the fourth oranges, then derive the

What argument could the SLOC members make that the payments made do not fit the meaning of an illegal bribe? (FCPA)

70. ## MATHS

A woman borrows 100000 euro to improve her house. she borrows the money at 15% interest and repays it in full after three years. What interest will she pay? PLEASE HELP

71. ## HSM 270

I have started this but I am stuck I do not really understand it I need help Stakeholder Influences Programs must often cater to the needs or expectations of many stakeholders, which may include the program administrator and staff, the funding institution,

72. ## Math Elementary

Carol reads four times as many pages than John. They read 40 pages together. How many more pages did Carol read than John. My answer is Carol read 16 pages more than John. Am I correct.

73. ## statistics

What SPECIFIC statistical test would be applied to these data collected to answer the following questions? What’s the average amount of pain Mr. Smith reported yesterday? Is there a significant difference in depression levels (using a scale of 0-60)

74. ## English

I urgently need to check these sentences. I did the corrections myself. I just want to know if my corrections are OK. 1) A smaller stage, called inner stage, was hidden by a curtain at the bottom of the main stage and was used, for example, for the

75. ## physics

How fast must a 3000 lb car be traveling to hit a 4000 lb minivan on the side rear to spin it 180°

76. ## english

Sukie and Lee get up early.Tey are going to grandma today. They will ride in the car with mother and father to get to grandma's house. please can anybody define the major charaters in this paragraph? I think Sukie and lee

77. ## English Lit

I have two questions about these Emily Dickinson's "Wild Night" 1.Which best describes the rhyme in the second stanza--internal rhyme,slant rhyme,feminine rhyme,descending rhyme or no rhyme Would it be slant rhyme? 2.Which is the following sound device

78. ## Physics

A bicycle is moving at a constant speed of 12m/s as it covers a distance of 200m. it then applies its brakes and stops over the next 350m. how much time doe sthis total motion take?

79. ## Written Analysis

I would really appreciate help with a paper i'm having mental block with! The should be a paper on a topic that is hotly debated in American society and the article should be written by an author with an opposing view to my own. The article should include

80. ## english

Please tell me the anthropological perspective. Is the culture, the cross-disciplinary discipline etc? Thanks!

81. ## English

Was my correction OK? You can't say the Juliet's tomb scene (but scenes such as Juliet's tomb) I left out a sentence. 1)Women were not allowed to play so men had to play their roles. (Is this sentence OK?) Better: Female roles were replaced by boy-actors.

82. ## organic chem

How do injector temperature and detector temperature affect retention time of a compound in gas chromatography?

83. ## math

What is the function rule for input 2 output 6 input 4 output 7 input 6 output 8 input 8 output 9

A researcher was given the assignment of predicting which of three actions would be taken by the 280 employees in the Desota plant that was going to be sold to its employees. The alternatives were to: a. Take severance pay and leave the company. b. Stay

85. ## west ashley middle

find e,if a=8,d=22,b=4

86. ## Math help

6y³(2x - 5y² + 8) help solve

87. ## calculus

Find the points at which the following function is discontinuous.Indicate the intervals at which the function is continuous. f(x)= (x^2 if x

106. ## physics

A sign that has a mass of 10.0kg is suspended by two wires, as shown below. (wire 1 is at a 40 degreee angle with the sign, wire 2 is at no angle) Determine the force exerted by each wire in supporting the sign. \in cluse a free-body diagram as part of

107. ## Physics

Two packing crates of masses m1 = 10.0 kg and m2 = 6.60 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 6.60-kg crate lies on a smooth incline of angle 37.0°.

108. ## Math: Functions

A circular oil slick is expanding with radius, r in yards, at time t in hours given by r=2t-0.1t^2, for t in hours, 0

109. ## statistics

The sum of the draws from a box is 440. If the average of these draws is 2.20, how many draws were there?

110. ## Math

A certain soccer team wins (W) with P(W)= 60%, loses(L) with P(L) = 30%, and ties (T) with P(T) = 10%. The team plays three games over the weekend. a.Determine the elements of the event A that the team wins at least twice and does not lose. b.Find P(A)

111. ## Chemistry

Ethanol (C2H5OH) boils at a temperature of 78.3oC. What amount of energy, in joules, is necessary to heat to boiling and then completely vaporize a 28.6 g sample of ethanol initially at a temperature of 10.8oC. The specific heat of ethanol is approximately

112. ## Statistics

Four people(North, South, East, West) are each dealt 13 cards from an ordinary deck of 52 cards. a. If South has exactly one ace, what is the probability that his partner North has the other three aces? b. If North and South together have 10 hearts, what

A researcher was given the assignment of predicting which of three actions would be taken by the 280 employees in the Desota plant that was going to be sold to its employees. The alternatives were to: a. Take severance pay and leave the company. b. Stay

114. ## Physics

A block of mass m = 5.9 kg is pulled up a è = 21° incline as in the figure with a force of magnitude F = 34 N. (a) Find the acceleration of the block if the incline is frictionless. 1 Your response differs from the correct answer by more than 10%. Double

115. ## Geography

Graticules on small scale map represents ________ and ______. Graticules on large scale map represents ________ and ______.

116. ## chemistry

Antimony forms 2 chlorides having widely different properties. One of the chlorides is a solid that melts at 73*C and contains 46.5% chlorine by mass. The other is a liquid that boils at 140*C and contains 59.3% chlorine by mass. Show how these results

117. ## chemistry

calculate the weight of copper in the Cu(NH3)4SO4 H20 you made. Mass of Cu(NH3)4SO4 H20 = 0.1140g

118. ## algebra

-7|2x+21|-7=42 set notation and solution

119. ## physics

A mass M can slide with negligible friction inside a tube bent in a circle of radius R = 1.45 m. The tube rotates about its diameter; the mass is in equilibrium at ¦È = 47.3¡ã. Calculate the number of revolutions the hoop makes in 115 s.

120. ## college chemistry

For the equilibrium Br2 + Cl2 goes to 2BrCl at 400 K ,Kc = 7.0. 0.30 of Br2 and 0.30 of Cl2 are introduced into a 1.0 L- container at 400 K.a) What will be the equilibrium concentration of Br2? b) What will be the equilibrium concentration of Cl2 ? c) What

121. ## math

3x+y+2z=1 x+2y-z=-8 3x-y-3z=18 after I isolate x what is the 2nd equation

2/x+3=3/x-2

123. ## calculus

Find the limit as x approaches -4 of 4-lxl/4+x

2/x+3=3/x-5

125. ## mathematics

x^2+8x+15/x^2+x+3

126. ## mathematics

5/2x+7=4/2x-7

127. ## Calculus

A plane flying with a constant speed of 4 km/min passes over a ground radar station at an altitude of 5 km and climbs at an angle of 45 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 4 minutes later?

128. ## trig

I have to factor the expression and use fundamental identities: sins^2xcscx^2-sin^2x sec^4x-tan^4x

129. ## Physics

To create artificial gravity, the space station shown in the drawing is rotating at a rate of 0.600 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB = 3.00. Each chamber A simulates an acceleration due to gravity of 5.10 m/s2. Find

130. ## AP Chemistry

What volume of 0.149 M K3PO4 is required to react with 41 mL of 0.793 M MgCl2 according to the equation 2 K3PO4 + 3 MgCl2 → Mg3(PO4)2 + 6 KCl Answer in units of m

131. ## ap history

please help with this DBQ to what extent it is justified to characterize the industrial leaders of the 1865-1900 era as either robber barons or industrial states-man? ive looked at the internet but not much about industrial statesman. what do you think?

132. ## Science

What body system is most like the mitochondria in cells? It has to be one of these: Respiratory Muscular Immune Nervous Since I already used the other systems.

133. ## Finance

how do solve a math question that states an employee has an annual salary of 26,965. after he arranges to have deducted from his salary 12% for the purchase of bonds, 17% for federal withholding tax, and 3% for a retirement fund, how do you solve this

134. ## College Chemistry

What is the final temperature, in oC, after a 26.5 g piece of ice, at 0oC, is placed in a styrofoam cup with 122 g of water initially at 73.8oC the specific heat of water = 4.184 JK-1g-1 The heat of fusion of ice = 333 Jg-1

135. ## Chemistry

How do you calculate the concerntartion of vinegar?

136. ## English-Writing

Many students fear the thought of college. It is not only the transition from high school that intimidates them, but large classrooms, two hour seminars, and worse part, the fear of failure is what keeps them from going. Hence either take shorter hours,

137. ## Statistics

People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 90% confidence? Initial survey results indicate that standard deviation= 15.5 books.

Use the equation y = ax^2 + bx + c where x is the horizontal distance a baseball has traveled and y is the height of the ball at the given distance. 1)Are some values of y unreasonable? 2)How is this information important for choosing a window for the

139. ## chemistry

In a reaction, 37.5 g of chromium(III) oxide reacts with 13.3 g of aluminum to produce chromium and aluminum oxide. If 25.7 g of chromium is produced, what mass of aluminum oxide is produced?

140. ## english

which are stressed syllables in not lured by any cheat of birth

141. ## solid mechanics 1

a load p is supported by a steel pin that has been inserted in a short wooden member hanging from the ceiling. the ultimate strength of the wood used is 60 MPa in tension and 7.5 MPa in shear, while the ultimate strength of the steel is 145 MPa in shear.