1. Physics

A 0.006-kg bullet traveling horizontally with a speed of 1.00 103 m/s enters an 21.1-kg door, imbedding itself 10.4 cm from the side opposite the hinges as in the figure below. The 1.00-m-wide door is free to swing on its hinges. (c) At what angular speed

2. Physics

Four objects - a hoop, a solid cylinder, a solid sphere, and a thin, spherical shell - each has a mass of 4.59 kg and a radius of 0.252 m. (a) Find the moment of inertia for each object as it rotates about the axes shown in the table above. hoop____ kg·m2

3. Statistics

If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the point in the distribution in which 75.8%

4. physics

A block weighing 8.3 N requires a force of 2.6 N to push it along at constant velocity. What is the coefficient of friction surface? A weight W is now placed on the block and 8.2 is needed to push them both at constant velocity. What is the weight W of the

5. Chemistry

When 35.0 mL of 1.43 M NaOH at 22.0 degres Celsius is neutralized by 35.0 mL of HCL also at 22.0 degrees Celsius in a coffee-cup calorimeter, the temperature of the final solution rises to 31.29 degrees Celsius. Assume that the specific heat of all

6. Math

An insurance company wishes to examine the relationship between income (in \$,000) and the amount of life insurance (in \$,000) held by families. The company drew a simple random sample of families and obtained the following results: Family - Income - Amount

7. physics

Two 72.0 kg hockey players skating at 5.25 m/s collide and stick together. If the angle between their initial directions was 125 degrees, what is their speed after the collision?

8. physics

on a air track, a 400g glider moving to the right at 2.00m/s collides elastically with a 500g glider moving in the opposite direction at 3.00 m/s. Find the velocity of the first glider after the collision Find the velocity of the second glider after the

9. math

A boat is spotted in the water with an angle of depression of 25° from the top of a lighthouse that is 89 feet tall. To the nearest foot, how far away is the boat from the base of the lighthouse

10. Chemistry

Suppose that two hydroxides, MOH and M'(OH)2, both have Ksp = 1.0 10-12 and that initially both cations are present in a solution at concentrations of 0.0036 mol · L-1. Which hydroxide precipitates first? I know MOH ppt's first...but am not sure how to

11. high school physics

3seconds after a gun is fired, the person who fired the gun hears an echo. How far away was the surface that reflected the sound of the shot? (book answer is 510m) speed of sound 340m/s time = 3seconds dont know what to do

12. chemistry

Will this solution form a buffer? 100 mL of .10 M NH3; 100 mL of .15 M NH4Cl Work: NH3= .01 moles NH4Cl= .015 moles .... not sure what else to do. I think we use the H-H equation, but I don't know how to find pKa, or even what pKa is. This should give the

13. high school physics

a string 180 cm long resonates in a standing wave that has 3 segments when driven by a 270hz vibrator. What is the speed of the waves on the string? (answer in book 324 m/s) frequency = 270 hz segments of wave = 3 v= f x wave I don't know what to do....

14. Physics

How far apart are an object and an image formed by a 62 cm focal-length converging lens if the image is 2.75X larger than the object and is real?

15. Chemistry

Determine the volume of a 0.550 M KMnO4 solution required to completely react with 2.55 g of Zn.

16. English

1. Each one of us has his room. 2. Each one of us has her room. 3. Each one of us has its room. (Is Only #1 correct? What about the others?) 4. Move the chair to the front of the class. 5. Move the chair on the front of the class. 6. Move the chair in the

17. Pre-Cal

Find the exact sine value of the angle in standard position whose terminal side goes through the point (-1,5) I do not know when to start

18. Physics

A pilot flies an airplane in a vertical circular loop at a constant speed õ = 160 m/s. If the pilot’s apparent weight at the top of the loop is one-third of his true weight when he is on the ground, find the radius R of the plane’s circular path.

19. English

1. We should not eat and drink in the library. 2. We should not eat or drink in the library. (What is the difference between them?) 3. We should not both eat and drink in the library. (Does this mean that we can either eat or drink? Does #3 mean #1?) 4. We

20. Physics

A 600 N uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal, 6.00-m-long, uniform, 90-N rod. The left end the rod is supported by a hinge and the right end is supported by a thin cable making a 30.0° angle with the

21. Chemistry

A typical fat in the body is glyceral trioleate, C57H104O6. When it is metabolized in the body, it combines with oxygen to produce carbon dioxide, water, and 3.022 x 10^4 kJ of heat per mole of fat. B)How many kilokoules of energy must be evolved in the

22. Chemistry

I am not sure about this question I tried a) but am very confused with b. Experiments were preformed with four metals and solutions of their ions: A- A+, B-B2+, C-C2+, D-D2+. The results of the experiment were: D2+ + C --> No reaction B2+ + C --> B + C2+

23. English

1. We should not scribble in books in the library. 2. We should not write down in books in the library. 3. We should not make a noise in the library. 4. We should not walk making sounds in the library. 5. We should not tear books in the library. 6. We

24. MATH 209

Ace manufacturing has determined that the cost of labor for producing x transmissions is 0.3x2+400x+550 dollars, while the cost of materials is 0.1x2+50x+800 dollars. Find the total cost of producing x=500 transmissions.

25. Biology

I'm stuck on these--- 9. Most of the end products of digestion are absorbed into the circulatory system from which organ? a. liver b. pancreas c. large intestine d. small intestine 11. Pancreas is to small enzymes as a. stomach is to saliva b. stomach is

26. classroom instruction

• Write a 200- to 300-word response describing how you might teach this concept to students in a lower elementary grade and to students in a middle school grade. i picked problem solving i have this so far. i guess for each grade level (elem and middle

27. personal finance

Beverly is planning for her retirement.She has determined that her car is worth \$10,000,her home is worth \$ 150,000,her personal belongings are worth \$100,000 and her stocks and bonds are worth \$300,000.She owes \$50,000 on her home and 5,000 on her

28. Math

If sin(x) = /45 and cos(y) = 5/13 with both x and y terminating in quadrant 1 find the exact value of cos(x-y) cos(4/5 - 5/13) Is this what I would do?

29. Chemistry

Use the data in this table to calculate the solubility of each sparingly soluble substance in its respective solution. (a) silver bromide in 0.066 M NaBr(aq) mol · L-1 I know how to do this one, found it to be 1.167E-11 which is correct. (b) nickel(II)

30. Biology

40. Explain how fish gills maximize the surface area available for oxygen exchange. Need help on this Thanks -MC

31. math

Bayside Insurance offers two health plans. Under plan A, Giselle would pay the first \$150 of her medical bills, plus 40% of the rest. Under plan B, Giselle would pay the first \$250, but only 35% of the rest. For what amount of medical bills will plan B

32. physics

An object of mass 10.0 kg is initially at rest. A 100 N force causes it to move horizontally through a distance of 6.00 m. What is the change in the kinetic energy of this object?

33. English

1.He delayed doing/to do his homework. 2.He suggested going/to go on a picnic. 3.He quit smoking/to smoke. 4.He avoided meeting/to meet the lady. 5.He proposed going abroad/to go abroad. (Which one is correct? Do we have to use only gerunds in the

34. Physical Science

Consider the current-carrying wires in the figure. Both cases consist of long straight wires carrying a current I. In both cases, the wire is also bent in the shape of a circular loop of radius R. The only difference is in how the bending of the wire is

35. Geography

17. Why have the people of West Africa started to work at the local level to help their economies? a. They have learned that their governments alone can do little to improve economic conditions b. Foreign countries have stopped all economic aid to West

36. Biology

10. The mouth, small intestine, and kidneys have functions that involve the a. digestion of food, synthesis of vitamins, and filtering of the blood b. intake, digestion, absorption, and elimination of food and wastes c. secretion of bile, digestion of

37. Algebra

Factor completely. If the given polynomial is not factorable, indicate so by writing prime. 4x^3+8xy^2

38. History

Why was Andrew Jackson considered a "common man" political wise, not how he lived. I mean what three or two events and decisions did Jackson do during his presidency that made him the citizen president?

39. Math

In printing an article of 48,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1,800 words. Using a smaller type, a page contains 2,400 words. The article is allotted 21 full pages in a magazine. How many

200 ml of a gas at 27oC and 1140 Pa pressure is transferred to a vessel of 450 ml capacity. What temperature is to be applied, if the pressure applied is 2000 Pa?

41. statistics

A statistics practitioner formulated the following hypothesis: Ho: population mean=200 H1: population mean

42. Math 157-1

Use the data in the grade-distribution Use the data in the grade-distribution table below to construct a circle graph showing the distribution of grade types in Ike’s class. Grade Frequency A 2 B 8 C 11 D 2 F 1 How would the graph change if there were

43. English

Hey, I need your suggestions on this one. Could you please name some of the most beautiful, most emotional pieces of writing you've ever read. It can be poetry or prose or titles of novels or even someting you've written yourself, if your gonna do that can

44. math

If you can drive your car 540 miles on 26 2/3 gallons of gasoline, how many miles can you drive on one gallon?

45. INTRO TO STATISTICS HYPOTHESIS TESTING

Math Horizons is a publication of the Mathematical Association of America. A recent issue reports that in the United States, graduating mathematics majors who also have studied actuarial science have an average first year income of 49,600. Suppose a random

46. Art

What are the differences between film and popular cinema? I can not find much about this. If anyone has any sites they can refer me to i would greatley appriciate it. Thank you

47. Geography

14. Scientists believe that the Great Rift Valley was created by a. volcanic eruptions b. tectonic forces c. broadleaf evergreen d. mid-latitude deciduous B

48. English

Hello, class. We are going to do an activity. I want you to interview two of your new friends. You can go to any students who you do not know well in this class. Thre are two memos on the page of the textbook. You should fill in the blanks with the

49. Geography

22. What factor explains why the Democratic Republic of Congo has been economically unsuccessful? a. corrupt national leadership and inefficient use of resources b. a lack of natural resources c. a lack of rivers that could be used for transportation d.

50. Math

Given:a and b are first-quadrant angles, sin a = 5/13 , and cos b = 3/5 , evaluate sin(a - b).

sin(180 + 0)

52. algrebra

The function W(d)=0.112d approximates the amount in centimeters of water that results from d cm of snow melting. Find the amount of water that results from snow melting from depths of 20cm,38com, and 62cm.

53. Math 30

Describe how the graph of y=f(-2x+6)+7 can be obtained from the graph of y=f(x). I am not understanding this transformation unit at all.

54. Math

solve for x: log4 X - log4 2 = 2 log(2x) = 2 Now what do I do?

What is the highest number of pi?

56. College Chem

Is the percentage of sodium in pure table salt 39.34%?

57. Education

SRA, I have a hard time finding quality research material using the google search engine. Do you have any suggestions about any tutorials I can take that will teach me how to properly search the internet for my papers? Thank you,

58. math116

What does it mean for a system to be consistent or inconsistent?

59. Math - Caculus

How do I evaluate the limit of e^tan(t) as t approaches pi/2 from the positive side?

60. statistics

a study found that the average time it took a person to find a new job was 130 days. If a sample of 36 job seekers was surveyed, find the 95% confidence interval of the mean. Assume the standard deviation of the sample is 12 days.

61. maths

c) An equilateral triangle of side 3 cm each is given, How many triangles can be made from this equilateral triangle of 1cm?

62. Algebra

Find the maximum value of the objective function z=24x+7y subject to the following constraints : 0¡Üx¡Ü10, 0¡Üy¡Ü5,3x+2y¡Ý6.

63. american history

Francis Cabot Lowell led a group of businessmen who? A. built a centralized textile factory in massachusetts B. ended that market revolution C. received the first state charter for a bank D. cashed in so many bank notes that they led to a panic in 1837

64. critical thinking

identify the fallacy: The reason I don't accept evolution is that ever since Darwin, scientists have been trying to prove that we evolved from some apelike primate ancestor. Well, they still haven't succeeded. Case closed

66. English

PLEASE HELP! I am stuck on writing A descriptive essay 500-750 world, My Topic An elderly person

67. algebra

Cole's two student loans totaled \$31000. One of his loans was at 2.8% simple interest and the other at 4.5%. After one year, Cole owed \$1024.40 in interest. What was the amount of each loan?

solve for x: log4 X - log4 2 = 2 log(2x) = 2 Now what do I do?

please can you help me in this: Ethical Systems Table 1. Fill in brief definitions of each primary ethical theory. 2. Identify alternate names or variations of each ethical system based on your reading of the text and supplemental materials. Match the

70. Pre-Cal

Find the maximum value of f(x) = -2x^2 + 12x - 14 Do i have to set this equal to o to solve?

71. Africa

Which of the following is true of both Libya and all the nations of the Maghreb?

72. Math

If sin(x) = 4/5 and cos(y) = 5/13 with both x and y terminating in quadrant 1 find the exact value of cos(x-y) I know that the denominator will be 65

73. math

what would be a good window for the graph of f(x) = -x^5 + 5x^3 - 3x + 15 I think that -10< x

74. math

the product of 5/8 and 64 is ........less than 48.

What events led up to the Civil War? A State's Rights B Slavery C All of the above

76. math

Dave has received scores of 85,87,88 and 85 on his algebra test. What scroce must he receive on the fifth text to have an overall text score average of at least 88? please explain

77. poetry

In school i have to write a POEM about story from the newspaper. can anone help me? that's the story: TAMWORTH ONE COPS IT IN COPSE, ENDING GREAT ESCAPE. After more than a week on the run the Sundance Pig was not going to come quietly. His partner might

78. Trig 30

How would I find the general solution for x/2=2pi/3 and x/2=pi/3?

79. English

What type of writing dominated the American Age of Reason?

80. algebra

Could you help me with this? find the real zeros of f(x) = x^3-8^2+9x+18(x-8^2+9x+18 I know it must be real simple. I have a block somewhere. Thanks I think I understand the Descartes rule of sign change. This equation has 2 sign changes. The total amount

81. physics

Imagine an airplane passenger looking down on two automobiles side by side on the ground. According to the Rayleigh criterion, at what maximum altitude will the passenger just resolve them as two if their center-to-center separation is 3.3 m? Assume that

82. math

-4 L.T. 3X+5 AND 3X+5 L.T. 20 solve

83. Geography

18. Which sentence below is a cause-effect statement? a. Nigerian students and workers often protested during the structural adjustment period b. One of the surprising facts about West Africa is that the Sahara was not always a desert c. Because of their

84. Math(Check)

Given that tan(Q) = -3/4 and Q is in the second quadrant tell the value of the cosQ cos=-4/5 Correct?

x2+y2+2x+4y=-2

87. math 12

Could you please show me how to solve this question.If 2 cos A-1=0, where 0< or = A < 2pi what is A equal to?

If sin(x) = /45 and cos(y) = 5/13 with both x and y terminating in quadrant 1 find the exact value of cos(x-y) cos(4/5 - 5/13) Is this what I would do?

89. Pre-Cal

Find the inverse of the function f(x) = 3^x+2

90. math

suppose that an experiment has four possible outcomes. a,b,c and d. if p(a)= p(b)= p(c) and p(d)= 2p(a) what is the probabilty of each event

91. Algebra

factor completely 256-x^4

92. College Chem

Please tell me if this is correct...Finding the mean, the average deviation from the mean, the standard deviation from the mean, and the relative deviation from the mean...of 10.1, 10.4 and 10.6 Mean-10.4 Average deviation-0.167 Standard deviation-0.25

93. Help!!!

sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?

94. math

If sin(x) = /45 and cos(y) = 5/13 with both x and y terminating in quadrant 1 find the exact value of cos(x-y) cos(4/5 - 5/13) Is this what I would do?

95. History

What is the history of the Temple Mount? I've been looking up a lot of information for this but some of it is too much and I need a more condensed infomation.

96. Finance

collins office supplies

97. physics

A railroad car rolling along by itself is passing by a grain elevator, which is dumping grain into it at a constant rate. (a) Does momentum conservation imply that the railroad car should be slowing down as it passes the grain elevator? Assume that the

98. science

Who was the 21 president?

100. Biology

14. Which of the following is the blood vessel with the largest diameter? a. capillary b. artery c. vein d. venule Not sure...? 16. As a defense against pathogens, mucous membranes a. cover all of the body's surfaces to act as an impenetrable barrier b.

101. math

what fraction of aright angle is 18

102. english

Which sentence is correct? Anyone who wants a copy of the game may have it for their video library or Anyone who wants a copy of the game may have it for his or her video library?

103. precal

solve the equation on the interval [0,2pi) cos(x+pi/4)-cos(x-pi/4)=1

104. Precalc.

solve the equation on the interval [0,2pi) sin^2x=1

105. Physics

(a) How far from a 53.6 mm focal-length lens must an object be placed if its image is to be magnified 2.12X and be real? (b) What if the image is to be virtual and magnified 2.12X?

106. ALGEBRA

sqrt(5) * sqrt(10) * sqrt(x^2) = how can i solev this??

107. psychology

Explain how having a negative self-schema affects one’s social interactions. How does social intelligence affect one’s responses in any given situation? How might a person’s self-guides impact his or her perspective on the world?

108. English

1. This book is really fun. 2. This book is real fun. 3. This book is great fun. (Which one is correct? Are all corect? What is the part of speech of 'fun'?) 4. Shine a light on the back of the stage. 5. Shine a light at the back of the stage. 6. Shine a

109. math

Round off 76.24491 to the nearest hundredth.

110. Art

What are the differences between film and popular cinema?

111. Math

Find the simple interest for the indicated length of time: \$7,211 at 12% interest for 1.7 years A) \$2336.36 B) \$774.23 C) \$1384.51 D) \$1471.04

112. English

How long did the journey to Virginia actually take Smith and the colonists?

113. english

What happened to John Howland?

114. computers

On an Ethernet 10BaseT network, all computers are connected with a hub. Recently a network-intensive application had been installed, and users are complaining that response times are quite slow on the network. You decide that you need to upgrade the

115. Math

The following interval represents the solution of an absolute value inequality. Find an example of an absolute value inequality whose solution is described by this interval. [-2,1] please expalin

116. trig

How do you convert polar coordinates to Cartesian coordinates? And vise versa.

117. English

Why is Taylor's passage 'With rivers like green ribbons smaragdine' rich in imagery?

118. math

How do you convert polar coordinates to Cartesian coordinates? And vise versa.

119. math

2x-5/10 less than -5 or 2x-5/10 greater than 9. solve the compound inequality.

120. science

What is a result of scientific research in the field of genetics

121. sports

hi Im looking for job discription on a juniour rugby coach, seniour and mens i have tried the internet but it wont let me open files about it please help

122. history

I have to do a brochure on a famous place around the world. A while ago I saw in the History channel about this rock somewhere, i forgot what it's called and I forgot where it is. I heard that it is said that if you move the rock, it will cause the end of

123. Math(Urgent)

Find the exact values of the vertical asymptotes for o is less than or equal to Q is less than or equal to pi for the function y= cot(3Q) I need to show my work for this one but I do not know how to do this.

124. ACC/220

a 200- to 300-word response explaining what information would be found in each of the following groupings on a classified balance sheet, and how that data could indicate the future success or failure of a business: Current Assets Long Term Investments

125. world history

who is Rosa Parks relitives

126. Chemistry

Use the data in this table to calculate the solubility of each sparingly soluble substance in its respective solution. (a) silver bromide in 0.066 M NaBr(aq) mol · L-1 I know how to do this one, found it to be 1.167E-11 which is correct. (b) nickel(II)

in which one quadrant is the cosecant negative and the secant positive. Quadrant 4. Is this correct?

128. math 12

If 2cos A-1=0 where 0

129. math (check)

in which one quadrant is the cosecant negative and the secant positive. Quadrant 4. Is this correct?

130. accounting

sold 7500 shares of commond stick at \$86 per share, received cash

131. geometry

the ratio of two supplementary angles is 2:7. what is the measure of the smaller angle

132. Algebra

This is a quadratic equation problem I'm not sure how to start. Suppose you are an events coordinator for a large performance heater. One of the hottese new Broadway musicals has just started to tour. Supply information about projected ticket sales. you

133. chemistry

what are some impressive lab acids that i could name and say what they're used for, for hw (for MONDAY)

134. Math

Find the exact values of the vertical asymptotes for o is less than or equal to Q is less than or equal to pi for the function y= cot(3Q) I need to show my work for this one but I do not know how to do this.

135. Math

sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?

136. psy 270

explain one way in which sociocultural biases in testing might pose problems for assessing mental retardation.

137. Science

How does a doctor diagnose the flu? What tests are performed? What samples need to be taken?

Differentiate sin(cubed)x with respect to x. Hence find (integration sign) sin(squared) x cosx dx. ALSO Find the equation of the tangent to the curve y = 2 sin(x-(pie divided by 6)) at the point where x = (pie divided by 3) .

139. Math

Find th evertex of the parabola given by f(x) = x^2 - 3x + 4 My answer was (3,13). Am I correct?

140. math 12

Does anyone know how to do this question? The cross section of the roof of a house is modelled by the function y= -5/12|x-12|+5 I need to find the slope, height,and length of both sides including the base of this isosceles triangle. I'm having a extremely

141. Math(Urgent!!!)

sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?

what type of input text in business case analysis

143. math

how do you find the surface of a rectangluar prism??????? need help

144. Math

Find the vertex of the parabola given by f(x) = x^2 - 3x + 4 My answer was (3,13). Am I correct?

6/9+2/3

146. Grammar

Which sounds better my brother knows more about technology than me or I

147. science

Explain why using standard measurements is useful

149. math

how do you find the area of a polygon

200 ml of a gas at 27oC and 1140 Pa pressure is transferred to a vessel of 450 ml capacity. What temperature is to be applied, if the pressure applied is 2000 Pa?

151. College Chem

With a relative standard deviation of 32.51+_ 0.15. Cant the result of 32.14 and 32.75 be discarded because they are out of the .15 range?

152. IT web

How has internet marketing come into play with the success of an E-Commerce site?

153. math

is a triangle with sides 7-7-7 a right triangle

154. math

what is the area of a rectangle which one side is 10 and diganale it is 32

155. math

can a object with sides of 17,15,7 a right angle triange

156. math

what is a rigt triangle

158. history

Explain the policy of engagement

159. macroeconomics

do you experience loss aversion as a consumer?

160. Algebra

|x+9| is greater than or equal to 0. Solve and graph the solution set on a number line.

161. algebra

Help! 2(x-4)-(x+2)= (x+2)(x-4) solve for x

162. Math

A park district paid their director \$19,500 in 1960. In 2000 that same park district paid their director \$40,000. Determine the average rate of increase per year to the nearest tenth of a percent This is my answer 40,000-19,500=20,500/100=205% is this

163. vocabulary

which of there words probably comes from the latin word conducere,meaning to lead together? A)complete B)control C)convince D)conduct i think it is (B) or (D)

164. english

Upon passing the site of her burned home, Bradstreet