# Questions Asked onApril 12, 2012

1. ## physics

A 1350 kg car rolling on a horizontal surface has a speed of 40 km/hr when it strikes a horizontal coiled spring and is brought to rest in a distance of 5.5 m. What is the spring constant (in N/m) of the spring?

2. ## Algebra 2

240,000,000x 0.000024/0.005 simplify and convert to scientific notation

3. ## physics

A space vehicle is coasting at a constant velocity of 20.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.270 m/s2 in the +x direction. After

4. ## math

the sum of the digits of a two digit prime number is substracted from the number. prove that the difference cannot be a prime number.

5. ## physics

A force of 200N is needed to push a 500N object up the inclined plane pictured below. Determine the force in, the force out, the distance in, the distance out, the work in, the work out, the mechanical advantage, the therotical mechanical advantage, and

6. ## Calculus grade 12

Determine the derivative of the function (² = square): a) y = (x² + x - 1)Sin²x b) y = (x² + 1)/Sin²x

7. ## Calculus grade 12

Determine the equation of the tangent line to the function (² = square): f(x) = x + cos²x at x = pie/4

8. ## Calculus grade 12

find the coordinates of all points on the graph of f(x) = x + 2cos(x) in the interval [0, pie] at which the tangent line is horizontal.

9. ## Calculus grade 12

a) determine the derivative of y = sin2x b) determine the derivative of y = 2SinxCosx c) shoe that derivatives in parts a) and b) are equal d) explain why derivatives in parts a) and be should be equal.

10. ## Calculus grade 12

differentiate the function ( a) y = cos³x b) y = Sin²xCos3x c) y = Sin (x³)

solve for (

12. ## Calculus Grade 12 University

a total of 8 meters of fencing are going to be used to fence in a rectangular cage for pets and divide it into three smaller cages **the photo that is shown with this question is three (3) boxes stuck together side by side horizontally*** determine the

13. ## algebra

at the airport the new run way will be parallel to a highway. on the scale drawing of the airport the equation that represents the highway is 6y=8x-11. what is the equation for the runway

14. ## math

There are 20 10% off cards, 10 15% off cards, 6 20% off cards and 4 50% off cards. What is the probability that a person will draw a 50% off card on the third draw?

15. ## math

You have 7 red marbles and 5 green marbles in a bag. You select one, do not replace it then select another. Find P(red,red) and P (green,green). Write probabilites as a percent and rounded to the nearest whole percent. Find P(red,green) and P (green,red).

16. ## Finance

A grocery store manager must decide whether to buy four rug cleaners to rent to customers. The manager estimates that the first would yield \$200 a year, the second \$150, the third \$75, and the fourth \$20. If the interest rate is 12 percent and each rug

17. ## Science

How were Mendel's ideas different from others at the time?

18. ## Math

Error Analysis: A friend says that the retail price of an item with a wholesale price of \$80 is \$100 after a markup of 125%. Describ and correct the error in the person's statement.

19. ## history

What were the successes of African Americans in building families, creating a culture, and winning rights? In what endeavors did they not succeed?

20. ## Algebra 2

You are creating a metal border of uniform width for a wall mirror that is 20 inches by 24 inches. You have 416 square inches of metal to use. Write and solve an equation to find the border's width.

asked by Lyle Eleda
21. ## Visual Arts

1.Using the conventional color wheel, name two PAIRS of complementary colors. This means at least 4 colors. When you put complementary colors next to each other, What is the visual effect? 2. Describe the difference between visual texture and actual

22. ## Mendel

How were Mendel's ideas different from others at the time?

23. ## maths

find the range of values for k for which the circle x^2+y^2=25 and the line y=x+7 do not intersect

24. ## Math

Find the range of values for k for which the circle x^2+y^2=25 and the line y=x+7 do not intersect

25. ## Math

In a factory, a parabolic mirror to be used in a searchlight was placed on the floor. It measured 40 centimeters tall and 90 centimeters wide. Find the equation of the parabola. I tried working this problem out and I got y=-8/405x^2+40, but I'm not sure if

26. ## Math help

Sketch the graph: (x+2)^2/25-(y+4)^2/25=1 I don't understand this at all! When I tried graphing it I just had two lines going through the center, which is (-2,-4). But it should be a hyperbola, right? Could anyone help me?

questions for thought: compare and contrast the weatering rate and weathering products foe ca-rich plagiclase in the following localities. 1. central pennsylvania 2. death valley with 2 inches rain per year 3. an alskan mountaiintop where water is frozon

28. ## statistics

Question 6: A manufacturer knows that the number of items produced per hour by its two factories A and B is normally distributed with standard deviations 8.0 and 11.0 items respectively. The mean hourly amount produced by Firm A from a random sample of 50

29. ## math

Two spherical cantaloupes of the same kind are sold at a fruit and vegetable stand. The circumference of one is 60 cm and that of the other is 50 cm. The larger melon is 1 1/2 times as expensive as the smaller. Which melon is the better buy and why? change

30. ## math

i try and try to practice for my checkpoints but i keep on failing in them!!!!!!!!!!! what can i do to improve in maths,science and english. please help me practice. I was hoping you could give me the real checkpoint papers for all subjects!! thatcwould be

31. ## Reasearch or Term paper ideas

I am doing my bachelors in forensic science semester two... I would like to know any common topics one may write over 30pages for a research or term paper in regard with forensic science. i tried body language and anti-social behaviour, though this topic

32. ## chemistry

4 gram of Na metal introduce into a 4 litre flask filled with Cl gas at STP(273K, 1 bar) after reaction over , find limiting reactant

33. ## physics

The device called an At-woods machine.if m2 is greatr than m1 an assumng th pulley to be frictionless and massless.1.how far will m2 fall in th time T aftr the system is released? 2.what is th tension in the cord that connect two massess? 3. If m1=5kg and

34. ## physics

The device called an At-woods machine.if m2 is greatr than m1 an assumng th pulley to be frictionless and massless.1.how far will m2 fall in th time T aftr the system is released? 2.what is th tension in the cord that connect two massess? 3. If m1=5kg and

35. ## physics

I want the answers of those questions!

36. ## math

What equation do you get when you solve v-m = v+nx for x How did you work this problem?

37. ## Apply Calculus

The Giant Ferris Wheel has a radius of 30meters. Assuming that a time t= t_0 , the wheel rotates counterclockwise with a speed of 40m/min, and is slowing at a rate of 15m/min^2 . Find acceleration vector for a person seated in a car at the lowest point of

38. ## math

Which value below is a possible solution to the compound inequality 0

39. ## Physics

I want a best project for science fair plz tell me

asked by Sai ram
40. ## physics

A 400g lemming waddles horizontally off a small 4.9m high cliff with a horizontal velocity of 0.5m/s. a. How far from the base of the cliff will the lemming land? b. What will be the lemmings speed just before landing? c. What is the lemmings kinetic

41. ## physics

if a steel flagpole get 5.1 mm taller when temperature increase by 5.0 degree celsius approximately how tall is the flagpole?

42. ## Please can help me solving my problems(Probality)

A manufacturer makes mobile phone. The manufacturer employs are inspector to check the quality of its product. The inspector tested a random sample of the phone being defective as 0.049. Ashmita buys three of the phones made by the manufacturer. Find the

asked by Fakaapo. Suetusi
43. ## math

Sharon's share for lunch is \$8. If she pays with a \$20 bill, how much change should she get?

44. ## physical science

Sarah lifts a 345 g shopping bag a distance of 1.2 meters onto a shelf. How much work was done?

45. ## math

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? (I know that you get 144

46. ## Math

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3

47. ## Physics

An EM wave has a wavelength of 620 nm. What is its frequency? How would we classify it?

48. ## Math

A sequence is formed by adding together the corresponding terms of a geometric sequence and and an arithmetic sequence.The common ratio of the geometric sequence is 2 and the common difference of the arithmetic sequence is 2.The first term of the new

49. ## chem

What is the pH in a solution that has a concentration of 4.5x^-3 M HCl rounded to the nearest hundredth?

asked by Tyler Clark
50. ## physics

a 55kg skateboarder on a 3kg board starts coasting on level ground at 8 m/sec. Let k=3.2 kg/sec. About how far will the skater coast before reaching a complete stop?

51. ## physics

a 55kg skateboarder on a 3kg board starts coasting on level ground at 8 m/sec. Let k=3.2 kg/sec. About how far will the skater coast before reaching a complete stop?

52. ## Science

A boat is moving east at 50 km/ hr on a river that is going west at 7 km/hr. What is the velocity of the boat.

53. ## Physics

A ball is thrown towards a vertical wall from a point 2m above the ground and 3m from the wall. the initial velocity of the ball is 20m/s at an angle of 30deg above the horizontal. if the collision of the ball with the ball is perfectly elastic. how far

54. ## English

I have some more sentences to check on the same subject.Thank you very much! 1) I took off a day because I was ill. Correction: I took a day off... Or I went sick (I took a day sick leave/I asked for a day sick leave??) 2) I would like to work at my

55. ## english (notificatins)

an appeal to logic--(persuasive appeals) the emotions that a speaker demonstrates towards his or her subject--(pathos) an appeal to the credibilty of the speaker--(ethos) an appeal to a sense of right or wrong--(logos) devices in a speech that seek to

56. ## Ecnomics

A large increase in gas prices creates a demand for cars with good gas mileage. It takes months for car companies to make these cars. How do you describe this market for cars? A. inelastic B. elastic C. static D. inferior

asked by Zach Ketchup
57. ## Economics

A music store holds a half-price sale on all CDs. During the sale, people buy more CDs than usual. What does this event show? A. inelasticity of demand B. the substitution effect C. the law of demand D. the income effect

asked by Zach Ketchup
58. ## Economics

Which is a fixed cost? A. rent B. labor C. raw materials D. heating fuel

asked by Zach Ketchup
59. ## Economics

How does an increase in an excise tax on cars affect the supply of cars? A. More cars will be made. B. Fewer cars will be made. C. Supply will stay the same. D. Supply will increase.

asked by Zach Ketchup
60. ## Statistics

According to the Pew Internet &American Life Project. 75% of American adults use the internet. The Pew project authors also peported on the percentage of Americans who use the internet by age group. The data in the in the agefile group was consistent with

61. ## marketing

Mark is trying to determine his firm's average cost per unit of production. He finds that the cost for all labor and materials is \$80,000 and fixed overhead expenses are \$40,000. If the company produces 20,000 items in the time period, the average cost

62. ## Economics

Due to an increase in her rent, Isa needs to cut back her spending on other items. Which of the following types of goods will Isa consume less of? A. substitutes B. normal goods C. inferior goods D. complements

asked by Zach Ketchup
63. ## Economics

The price of cranberry juice suddenly increases. As a result, Glenda begins drinking more grape juice, which is less expensive, but tastes just as good to her. In this case, Glenda’s elastic demand is due to A. availability of substitutes. B. relative

asked by Zach Ketchup
64. ## English 12 Literature

Critical Reading Identify the letter of the choice that best answers the question. According to Bede, what is true of Ireland? At the end of Morte d’Arthur, the narrator says he is not sure what happened to King Arthur. Some say he was buried by a hermit

65. ## Algebra 2

which property justifies this statement q+(r+s)=(q+r)+s a. communicative property of addition B. distributive property C. Associative property of addition D. identity property

66. ## Math Alg2

The number of computers sold by BCC depends on the dollar amount, x, that they spend on advertising. How many computers will they sell by spending \$100,000 on advertising? Round to the nearest whole number and do not include units in your answer.

67. ## physics (mechanics)

A running man has half the kinetic energy of a boy half his mass. The man speeds up by 1.30 m/s and then has the same kinetic energy as the boy. What is the speed (in meters/second) of the boy?

68. ## math

The Great Pyramid of Cheops has a square base of 771 ft on a side and a height of 486 ft. How many rooms 25 ft x 20 ft x 8 ft would be needed to have a volume equivalent to that of the Great Pyramid’s?

69. ## physics

An object of mass 200.0kg is moving from rest under the influence of net force 1.0Kn.Find the acceleration of the object and work done within 20.0s. What is the velocity of the object ar the end of 20.0s interval of time?.Calculate the kinetic energy

70. ## Chemistry

Which of the following is correct? A)A substance with pH of 3 is 10 times as Acidic as a substance with a pH of 4. B)A substance with a pH 3 is twice as acidic as a substance with a pH of 4.

71. ## Chemistry lab

What happens at the molecular level once equilibrium is reached, that is once the solution is saturated with Cu(IO3)_2?

72. ## numerical methods

x’ = 2x + 3y , x(0) = -2.7 y’ = 2x + y , y(0) = 2.8 [ 0 , 1 ] h = 0.05 EULER, RK4 AND TRAPEZOIDAL.. FIRST 10 ITERATION ONLY

73. ## Life orientation

What cause accident in our community

asked by Martha moeketsi
74. ## criminal justice

What is the technological and management system that aims to make the police better organized and more effective crime fighters?

75. ## Chemistry

Consider the reaction CH4+ 2Cl2=CCl4. If .33 moles of CH4 is reacted with 1 mole of Cl2, how much CCl4 is produced?

76. ## Chemistry

NaOH+H2SO4-> H2o+Na2SO4? How many moles of NaOH required to neutralize 1 mole H2SO4?

77. ## maths

Bag A contains 6 white beads and 3 black beads. Bag B contains 6 white beads and 4 black beads.One bead is chosen at random from each bag. find the probability that both beads are black and at least one of the two beads is white??

78. ## Chemistry

if given 10.0grams of aluminum and 20.00 grams of silver carbonate how many grams would it take to make aluminum carbonate from silver carbonate

79. ## 6th grade credits

how many credits does a 6th grader in oklahoma need to pass into 7th grade?

80. ## physics

a ball dropped on to a floor .if the coefficient of restitution is 0.5.the percentage loss of energy of the ball on rebounding from the floor is?

81. ## physics

Initially 48g of ice at 0 degrees celsius is in an aluminium calorimeter can of mass 2.0 g also at 0 degrees celsius.Then 75g OF water at 80 degrees celsius is poured into the can.What is the final temperature.

82. ## chemistry

The reaction described by the equation Zn + Hg2Cl2 2Hg +Zn+2 + 2Cl is run on electrochemical cell. The E^0 of the cell at 25 degrees C is 1.03V. In the same cell, [Cl-]=.10 M and [Zn+2] is unknown, and the measured cell voltage is 1.21V. Compute the value

83. ## Computer Studies

What is the difference between storage media and storage devices?

84. ## Calculus grade 12

a total of 8 meters of fencing are going to be used to fence in a rectangular cage for pets and divide it into three smaller cages **the photo that is shown with this question is three (3) boxes stuck together side by side horizontally*** determine the

85. ## Calculus grade 12

differentiate the function a) y = cos³x b) y = Sin²xCos3x c) y = Sin (x³)

86. ## Calculus grade 12

find the coordinates of all points on the graph of f(x) = x + 2cos(x) in the interval [0, pie] at which the tangent line is horizontal.

87. ## chem

why is the solubility of benzoic acid dependent on pH?

88. ## psychology

Modern psychoanalysis is defined as A treatment that focuses on observable behavior A treatmet method for mild to moderate disorders that uses a process of patient discovery Demonstrating how unconscious factors affect a persons current relationships and

89. ## psychology

Part of the therapists role in psychoanalysis is to? I believe listen

90. ## psychology

The idea of "lying on the couch" has come to be--- in modern society? praised feared admired ridiculed (my choice)

91. ## Calculas

find the compute derivative of f(x)=sinh^2(5x)

92. ## language

is welsh a dying language?

93. ## psychology

Which of the following is a technique that a psychoanalyst is most likely employ in treatment? medication to stabilize dopamine imbalances dream analysis (my answer) twin studies cognitive restructing

94. ## calculus PLZ HELP!

Solve for x: log base 25 (log base 7 X)= -1/2

95. ## calculus

a radiotactive isotope lose 1/5 of its atoms in a sample decay after 14 years. find the half life.

96. ## World History

Where did freedom come from?

97. ## psychology

In therapy, psychoanalysts try to trace unconscious factors that are the source of personal difficulty back to their historical source. Which of the following is an example of typical historical source that a psychoanalyst and his or her client might

98. ## intermediate algebra

Essay.Show work.The area of a rectangular swimming pool is given by 3x^2+11x+6ft^2.One side lenght of the pool is given by 3x+2ft.What is the algebraic expression for the other side of the pool.Simplify,an include correct units as part of your answer

99. ## English

I still have more sentences to check. I really hope you can revise them, too. 1) Revise all your sentences orally. 2) Bring the government down (and bring down the government) 3) He stopped to take on the students (to take the students on is possible?) 4)

100. ## calculus

find a square root of -7-24i

101. ## algebra-trig

Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.

102. ## algebra-trig

Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.

3x^2+x+2=0

104. ## statistics

You think that the best sampling strategy is stratified sampling. Youd like to list the characteristics of schools in this district, then randomly select 80 schools who roughly match the demographic characteristics of the entire population of schools in

105. ## English

I included a few things about correct behaviour in class. Can you please check them, too? 1) I should get top marks in all subjects. I should apply myself (fully) when in class. I should get involved in the lessons. 2) I should ask my classmates about next

106. ## Intro Physics

An EM wave has a wavelength of 620 nm. What is its frequency? How would we classify it?

107. ## Algebra 2

how do you find the slope and y intercept of: x= -3

108. ## physics

a projectile is fired at an angle of 60 degrees with the horizontal and with the initital velocity of 80 m/s. What is the time of flight?

109. ## English

Hi. Please help me with a problem. Is the following grammatically correct: "I don't know his plans. He was to go to London next week, but I'm not sure whether he will." Thank you very, very much.

110. ## Economics

An increasein governemtn expenditure in increasing GDP when it is financed by: a) rasing taxes b) slling governemtn bonds to the general public c) selling governemtn bonds to the central bank d) selling government bonds to the commercial banks e) both c

111. ## English!

Is this a good paragraph? And do you think it flows well? Please someone answer... Butterflies are such a beautiful insect. And to watch them go though their stages is even more beautiful. I have never seen it myself, but I've heard it is so cool. Well

asked by Paisley Jane
112. ## physics

a projectile is fired at an angle of 60 degrees with the horizontal and with the initital velocity of 80 m/s. What is the time of flight? What is the max height attained and the time taken to attain it? What is the range? The velocity of projection 2

113. ## Algebra 2

Name this polynomial by its number of terms and degree.? √29x^6

114. ## chemistry

write and equation for the reaction of triethylamine and water. does the eqilibrium go to the right or left. so far what I have is C6H15N + H2O but I'm not sure of the products

115. ## Computer Studies

What happens to a disk when it is formatted?

116. ## Physics

how does the slope of a Ff-Fg graph relate to the coefficients of friction , prove it mathematically.

117. ## Chemistry- intermolecular forces

When a benzoate ion goes through solvation, what is the intermolecular force involved? Is is hydrogen bonding?

118. ## geometry

A sphere with a diameter of 24 inches is reshaped into a cone with a radius of 32 inches. If all the material is used, what is the height of the cone?

119. ## Pre-Algebra

Suppose you consider a rectangular garden of 36 square meters with whole-number side lengths. What’s the dimension of design that has the least perimeter? What’s the dimension with the greatest perimeter?

120. ## English

I left out these other sentences. Thank you very much, Writeacher. 1) If I'm lucky, I'll work at a passion and at the same time at a career. I think that a good job is a job that you love and that permits (?) you to do the things you are keen on. 2) I have

121. ## 8th grade math

Each side of a picute is enlarged by 125%. If the original area was 88 square inches, what is the area of the enlarged picture?

122. ## math

Reading readiness of preschoolers from an impoverished neighborhood (n=20) was measured using a standardized test. Nationally, the mean on this test for preschoolers is 30.9 with SD=2.08. A) Children below the 30th percentile (in the bottom 30%) are in

123. ## Chemistry

Why is AlCl3 an Arrhenius Acid, while BCl3 is not? How can I determine which is an Arrhenius Acid?

124. ## education

I have an education project in which I have to explain my philosophies as a future educator, ex. why/how/who/what/where I will teach, who I will teach, and also use outside sources such as quotes to tie in with my ideas... I know I can do the project on my

125. ## algebra-trig help ASAP

Can someone please help me understand how to graph y=3cos(x/4)-5

126. ## Algebra 2

An airplane flies 1050 km with the wind. In the same amount of time, it can fly 750 km against the wind. The speed of the plane in the still air is 200 km/h. Find the speed of the wind.

127. ## Chemistry

we used the solution NiSO4 6H20 - i have to find the mass of solute dissolved in a 25ml solution. - and the molar concentration.

128. ## math

describe a triangle with sides of 9in., 4in. and 6in.

129. ## coal

there are coal fields along the _____ mountain range. pyreenes, penine, alps, ural i thought it was pyreenes but it said i was wrong. please help me..

130. ## physics

A mass of 2000g is drop from a height of 10m.what is the work done by the mass

131. ## ENGLISH--HELP

Every sentence in the paragraph below violates some principle of good persuasive writing. Revise the paragraph, following the directions at the end of each sentence; use your imagination where necessary. Type the revised paragraph in the text box provided

132. ## 6th geo

why is dover which is closer to coastal ports than is london, not the capital of english trade??

133. ## Geometry

In triangle abc angle a=3x+40 angle b= 8x+35 and angle c=10x Which is the longest side of the triangle, ab, ac or bc?

134. ## Geometry

In right triangle abc, c is the right angle. If the coordinates of A are (-1,1) and the coordinates of B are (4,-2). the coordinates of c maybe?

135. ## Chemistry

calories to freeze 35g of water calories to freeze 250g of water kilocalories to melt 140g of ice

136. ## ENGLISH HELP

What is this poem's meaning and how did you understand it? March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And

137. ## math

how many inches is in 6 feet of string and 32 inches

asked by Nix The Robot
138. ## Physical Science

A hockey puck moving at 28 m/s is caught by an 80.00 kg man who was at rest. The man and puck move together after the collision. The puck's mass is 0.16 kg. What is the final velocity?

139. ## Comp II

Need to write a 1000 word essay about this, but I can't figure out what the poem is even about. What is the meaning & how did you figure it out? thanks March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy*

a 10.0-g marble rolls to the left with a velocity of magnitude 0.400 m.s^-1 on a smooth, level surface and makes a head-on collision with a larger 30.0-g marble rolling to right with a velocity of magnitude 0.100 m.s^-1. If the collision is perfectly

141. ## math patterning

Look over the following sequence of numbers. What are the next 3 numbers in the pattern?what is the pattern rule? -1,0,1,0,1,2,3,6,11,20,37

142. ## circular motion

When you take your 1300-kg car out for a spin, you go around a corner of radius 57.7 m with a speed of 16.5 m/s. The coefficient of static friction between the car and the road is 0.93. Assuming your car doesn't skid, what is the force exerted on it by

143. ## math

A snailis trying to climb up a cup left by some students that littered.Each hour the snail slithers up 2`` but when he is tired he sleeps and slides 1``. How many hours until he reaches the top of the cup with a height of 10 is this an integer question?

144. ## physics

When you take your 1300-kg car out for a spin, you go around a corner of radius 57.7 m with a speed of 16.5 m/s. The coefficient of static friction between the car and the road is 0.93. Assuming your car doesn't skid, what is the force exerted on it by

145. ## math

The two figures are similar, solve a proportion to find the length n. Express the result as either a whole number or use decimal digits only if necessary. * * * 15 cm 9 cm * * * * * * * * * * * * * * 12 cm * * n * * * * * * * * * * * * * *

146. ## English

What is the significance of Nafisa Haj's book title "The Writing on my Forehead" ?

147. ## 4th GD MATH: NEED HELP NOW!!!!!

I forgot the difference between the divisor and the dividend. IN DIVISION.

asked by Nix The Robot
148. ## 6th grade geo

in which area would you find coal veins? in contrast to the southern uplands and the highlands, the central lowlands of Scotland which of the following is an accurate statement about the way that the welsh economy has changed in the late twentieth century

What does the word distinct mean and can you use it in a sentence?

150. ## Social Studies

The british originally established Australia as a_____colony. _ N _ A _

151. ## Chemistry

Describe how you would prepare 2.00 L of an aqueous solution having a pH=3.60, if you had a supply of 0.100 M HCl available.

152. ## Social Studies

One of the early battles of the war was the (Battle of Gettysburg,First Battle of Bull Run). Battles of Gettysburg? People in many U.S. cities paid their respects to President Lincoln after his (assassination,impeachment). assassination? Republicans in

153. ## math

How many 2 quart pitchers could you fill with 512 fluid ounces of juice?????

154. ## Physics

The minimum distance between particles in a wave that have the same displacement and are moving in the same direction is called?

155. ## social studies

how did geography affect europeans in latin america?

156. ## physics

Explain the Doppler Effect?

157. ## Physics

At what distance above the surface of the earth is the acceleration due to the earth's gravity 0.790 m/s^2 if the acceleration due to gravity at the surface has magnitude .

158. ## Physics

Four identical masses of mass 900 kg each are placed at the corners of a square whose side lengths are 15.0 cm. What is the magnitude of the net gravitational force on one of the masses, due to the other three?

159. ## Chem 112

Which of the following contains the metal with the highest oxidation number? a. CaCl2 b. NaCl c. FeCl3 d. CuCl2

160. ## Physics

A satellite used in a cellular telephone network has a mass of 2160 kg and is in a circular orbit at a height of 670 km above the surface of the earth. What is the gravitational force Fgrav on the satellite? Take the gravitational constant to be =

161. ## math

write an equation for the word problem: three times a number increased by 4 is -11. equation: 3n+4=-11?

162. ## Physics

Find the frequency of a wave whose period is 0.320s.

163. ## math

Jan Maya and Sara ran a total of 64 miles. two ran the same and one ran 8 less. how many miles did they run?

164. ## math

I have a question that asks me to look at two pictures that are of signs to warn you of the slope or steepness of the hills, one of those hills increases a short distance and then decreases a greater distance and has 17% written above the line that

165. ## physics

A diffraction grating is calibrated by using the 546.1 nm line of mercury vapor. The first-order maximum is found at an angle of 17.62 degrees. Calculate the number of lines per centimeter on this grating.

166. ## Social Studies

The _____ fur trade dominated economic interests in early Canadian history. _ E _ _ _ _

167. ## Calculus

Evaluate the integral. The integral from the square root of three over three to the square root of three of the function 6/(t^2+1)

168. ## Physics

Rotating initially at 1800 rpm, a wheel with a diameter of 74.0 cm is brought to rest in 11.0 s. Calculate the magnitude of its angular acceleration in radians/second^2

169. ## Calculus

Evaluate the integral. The integral from 0 to the square root of 2 over 2 of the function 8/sq. rt.(1-t^2)

170. ## what is this......

The Irish Potato Famine............ what is that?????? thanks for any help. can you explain what it is?

171. ## Ireland

Determine whether or not the following statement is a fact or an opinion: "Protestants and Catholics in Northern Ireland both feel threatened by the past and are reluctant to negotiate." What does it mean? pwetty pwease help me!!!

172. ## physics

A mass m1 = 6.0 kg sits on a frictionless table, and rotates at a constant speed v = 3.0 m/sin a circle of radius R = 1.5 m. m1 is attached by a massless string which passes through a hole in the centre of the table to a second m2 (which hangs freely

173. ## History

What event occured in the U.S. between 1861-1865? Civil War? What is located at 0 latitude and 0 longitude? Gulf of Guinea Name the 3 famous Civil RIghts leaders for African-Americans. Harriet Tubman,Frederick Douglas,and Dred Scott?

174. ## Phys

What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654 m?

175. ## physics

Write the energy transformation equation for each situation Fireworks explodes An arrow is shot off a bow and flies through the air A paved driveway feels hot on a clear ,sunny day A camper raises an axe to chop a chunk of wood A lawn mower with a gasoline

176. ## division of decimals

.160416 divided by 4

177. ## English

I still have a few sentences to check. I really hope you can help me check them. I added a few more sentences. 1)I think the best thing to do is working at a passion because in this way you'll work better than anyone else. 2)You feel the need to go to

178. ## Spanish

Te gustan Los coches pequenos?

179. ## Chemistry

A rxn has delta H ^0 rxn=-112kj and delta S^0 rxn =354 J/K. at what temp is the change in entropy for the rxn equal to the change in entropy for the surroundings?

180. ## ireland

Hey. I was wondering if you could help me.... what are the main reasons Ireland has had a troubled relationship w/ great Britain? how many years after the northern invasion did Henry II declare himself lord of Ireland? how many years passed between the end

181. ## Ms., Sue

On the question i asked a few minutes ago about the opinion.. what was you opinion about the statement??

182. ## Math

For the following data... 1. Provide evidence as to whether this data set if Gaussian or non Gaussian. 2. Determine the normal reference range. 3. Define a cut-off. Describe how a ROC curve can be used to determine such. 95 95 81 95 98 79 88 98 84 79 98 84

183. ## PHY103

Write 2 arguments in english, one in the form of modus ponens and one in form of modus tollens. Then write the arguments in symbols using sentence letters and truth functional connectives. What advantages does being able to symbolize our arguments provide?

184. ## physics

What is the angular momentum (in kilogram-meter^2/second) of a 300.0 g ball rotating on the end of a string in a circle of radius 1.87 m at an angular speed of 1.50 rad/s? Is there certain equations to find angular momentum for different shapes?

185. ## ireland

large areas of the Scottish highlands contain broad treeless plains is called

186. ## Math

The cost, C, of a manufacturing and selling x units of a product is C = 23x+73, and the corresponding revenue, R, is= x^2-35. Find the break-even value of x? A. 4 B. 31 C. 31 and 4 D. 27

187. ## Math

What is the surface area of a cylinder with a radius of 5.5cm and a height of 23cm?

188. ## Chemistry

what is the molarity of a solution of the strong base Ca(OH)2 in a solution that has a pH of 10.80?

189. ## chemistry

What is the final concentration (in M) of 17.6 mL sodium chloride solution with an initial concentration of 1.86 M which is diluted with 18.9 mL of solvent? Assume the volumes are additive.

190. ## Chemistry

A 100 mL sample of 0.10M HCl is mixed with 50mL of 0.10M NH3 (Kb=1.8x10^-5). What is the resulting pH?

191. ## Chemistry

A 100 mL sample of 0.10M HCl is mixed with 50mL of 0.10M NH3 (Kb=1.8x10^-5). What is the resulting pH?

192. ## English (Comma Question)

Which of the following sentences is correct? "James arrives and, after a period of confusion, Mary's secret is revealed." "James arrives, and after a period of confusion, Mary's secret is revealed." "James arrives and after a period of confusion, Mary's

193. ## Math

Colin is working to earn some money for a new cd player. On saturday he earned half as much as he did on sunday, but twice as much as he did on friday. During those three days he earned \$70. How much did he earn each day?

194. ## math

Eric gets paid \$7 for each hour he works at the electronics store, plus an extra \$2 for every store membership card he sells. How many memberships does he have to sell if he wants to make more than \$40 for working 4 hours? I need an inequality...

195. ## Programming Logic

Shemrock Inc. is a brake pad manufacturing company. This company uses raw materials, such as carbon powder, iron, ash, and resin. It wants to develop an inventory management system that will have the following features: 1.The system should store the

196. ## Economics

Can someone help me find good links to statistics of welfare in Canada such as the number of people who are dependent on it, how much it is abused, and the reduced labour output?

197. ## science

what is the word itvbarnoeso unscrambled?

asked by lillian shelters
198. ## Life orientation

Alcoholism is a human factor that may cause ill health, accident, crises or disaster

199. ## Algebra 2

What is the first term of a geometric series with a summation of 800, 4 terms and a common ratio of 3?

200. ## Physics (Mechanics)

An electron of mass 9.1E-31 kg is released from rest at a distance of 7.1 E-10 m from a fixed electron. The force on the movable electron is given by the function F = 2.3E-28/r^2, where r is the distance between the electrons. Find the maximum velocity (in

201. ## algebra

Suppose you have a can of paint that will cover 400 ft squared. A. find the radius of the largest circle you can paint. Round to the nearest tenth of a foot.( hint use the formula A=3.14 times radius squared B. Suppose you have two cans of paint, which

202. ## PHYSICS HELP !

when telling someone how to get to your house from campus, you need to a) give your direction of travel b) give your distance they need to travel c)give both directions and distance d) not enough information

203. ## physics

hey you guys , i reay appreciate it if you guys help me out . Q: a vector is a physica quantity that has which of the following properties ( can be more than one) a)magnitude b)color c)speed d)direction

204. ## physics - help !!!!!!!!

The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above. Thank you

205. ## math

brenda is twice as old as warren. jim is 10 years older than warren. jim is 25 years old. write an equation using the variable b to represent brenda's age and the variable w to represent warrens age

206. ## math

ben saved 1 penny on january 1, 2 pennies on january 2, 4 pennies on january 3, and 8 pennies on january 4. if ben continues to increase his saving at this rate, when will he have saved a total of \$10 or more? show your work

207. ## algebra

Jack was 10 years older then Priscilla together their ages totaled 170 years what were there ages?

208. ## vocabulary

joe put ___________ chips into the fire and then cooked some chicken on the grill. A. chile B.mesquite C. accordion D.culture I know its not C., or D.

209. ## Math

You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? (I know that you get 144

210. ## math

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3

211. ## Benelux Economic Union

When was the Benelux Economic Union established and what was its sole purpose? Online Content Assignment Using the sites listed on the left, please answer the questions below in complete sentences. The site reference is provided in parentheses at the end

212. ## math

What is the solution to the proportion shown below? (x+3)/4 = (x+2)/3

213. ## Understanding percentages

Check my answer,, A store advertises a shirt at 25% off the original price of \$44. What is the sale price? MY ANSWER: \$33.00 What is the percentage increase in high school enrollment from 1,165 students to 1,320? MY ANSWER: 13.3%

214. ## English

I just have four more questions. Thank you very much, Writeacher. 1) He was becoming a bit blasè by the time he had his last interview. I can't remember the meaning of blasè. 2) This tells that the job candidate is interested enough to research the

215. ## World history

Why do you suppose the leaders of newly independent nations in southeast Asia tended to be repressive, corrupt, or both?

216. ## math

Curtis found a rule for a table. The rule he made is y=7x. What does the rule tell you about every y=value?

217. ## test review

there's a book named "In My Family" in Harcourt Trophies. these are the questions I'm stuck on: What is the goals of all the paintings that Carmen Lomas Garza paints. A. to remember growing up in Kingsville, Texas B. to encourage pride in the Mexican

218. ## Understanding interest rates

What would be the diffrence in earning between simple and compound interest if your initial balance was \$1,000 rather than \$100? What would be the diffrence in earnings between simple and compound interest on your \$100 saving after five years? MY ANWER:

219. ## Math

Maria cut a pizza into 8 equal slices. She put a slice of pizza on 3 plates. What is the measure of the angle for the slices that are left?

220. ## physical science

A disturbance sends ripples across water in a tub. These ripples are an example of a? rarefaction longitude wave compression surface wave (my choice) Sound is an example of what kind of wave? transverse wave longitude wave surface wave wavelength (my

221. ## math

Frank cut a pie into 10 equal slices. There are only 3slices left. What is the measure of the angle for the 3 slices that are left?

222. ## English

How is my introductory paragraph to persuasive writing? Picture this, you are taking a test and the person next to you is chewing their gum loudly,so you can't concentrate. How disrespectful is that? The school board needs to make a rule no chewing gum in

223. ## math

The two figures are similar, solve a proportion to find the length n. Express the result as either a whole number or use decimal digits only if necessary. * * * 15 cm 9 cm * * * * * * * * * * * * * * 12 cm * * n * * * * * * * * * * * * * *

224. ## math

The two figures are similar, solve a proportion to find the length n. Express the result as either a whole number or use decimal digits only if necessary. * * * * * * 15 cm 12 cm * * n 9 cm * * * * * * * * ** * * * * * * * ** * * * * * * * * *

225. ## physics HELP !

when telling someone how to get to your house from campus, you need to a) give your direction of travel b) give your distance they need to travel c)give both directions and distance d) not enough information

asked by AMBER !
226. ## Chemistry

A solution contains an unknown mass of dissolved barium ions. When sodium sulfate is added to the solution, a white precipitate forms. The precipitate is filtered and dried and found to have a mass of 258 mg. What mass of baium was in the original

227. ## Science

Bobbie is playing with his radio-controlled car by using a handheld remote box. What type of energy is being used to power Bobbie's car? a)chemical energy b)electrical energy c)heat energy d)mechanical energy THANKS!!!!!

asked by Sally urgenttt
228. ## Physics

A major-league pitcher can throw a baseball in excess of 48.3 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 15.3 m away from the point of release?

229. ## Physics

What is your speed at the bottom of the "frictionless" Tornado water slide at Great America if the height of the slide is 34.0 meters and the length of the slide is 44 meters?

230. ## EDUCATION

According to Leeds,at snacktime,childrenshould be given _____ of each food for each year of their lives

231. ## Physics

Roger (mass of 75 kg) is travelling on a new ride called the Riddler's Revenge. On a 7.1 m hill he is moving along at 31.3 m/s, then slows down to 24.7 m/s on the second hill. How high is the second hill?

232. ## College Comp II

What is the meaning & how did you figure it out? thanks March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And the

233. ## Finance

Sam wants to buy a car for \$35000. How much does she need to put into an account earning 7% to buy the car in 5 years?

234. ## chemistry

Which of the following pairs can be used to prepare a buffer? (select all that can apply) a. HCl/NaCl b. HF/KF c. NH3/NH4Cl d. HNO3/HNO2 e. NaNO2/HNO3 can you also please explain how they form a buffer? thank you

235. ## Physics

Three identical small Styrofoam balls of mass 1.53 g are suspended from a ﬁxed point by three nonconducting threads, each with a length of 56.4 cm and negligible mass. At equilibrium the three balls form an equilateral triangle with sides of 31 cm. What

236. ## Science

Amber visits a theme park that has a roller coaster that travels upside down. Which of the following is the best explanation for why the roller coaster car stays in contact with the track when it travels upside down? A)The track and car are held together

237. ## Physics

Where must an object be placed to have a magniﬁcation of 3.74 in front of a converging lens of focal length 14.1 cm? Answer in units of cm

238. ## Education

What is locomotor reflexes?

239. ## Polytechnic soko nigeria

A body of weight 500N is liying on a rough plane inclined at angle 25 with the horizontal, it ir supported.by an effort P, parallel to the plane.determine the minimum and maximum value of P, for the equilibriun can exist if the angle of friction is 20

240. ## Science

Bobbie is playing with his radio-controlled car by using a handheld remote box. What type of energy is being used to power Bobbie's car? a)chemical energy b)electrical energy c)heat energy d)mechanical energy THANKS!!!!!

asked by Sally urgenttt
241. ## Social Studies

Is the great barrier reef natural or man-made?

242. ## Social Studies

How was the great barrier reef made or built?

243. ## Social Studies

Why do people visit the great barrier reef?

244. ## Social Studies

What other information about the Great barrier reef people would like to know about it?

245. ## Social Studies

How big is the great barrier reef?

246. ## Polytechnic soko nigeria

A body of weight 500N is liying on a rough plane inclined at angle 25 with the horizontal, it ir supported.by an effort P, parallel to the plane.determine the minimum and maximum value of P, for the equilibriun can exist if the angle of friction is 20

247. ## Social Studies

How old is the great barrier reef?

248. ## Social Studies

Where is the great barrier reef?

249. ## 7th grade math check

Ok I was wondering if you could check these 3 problems please. I am suppose to set these equations equal but I am not sure if did them right. I think I accidently solved these systems as substitutions. The answers are suppose to be in coordinate pairs. 1)

250. ## English

How is my grammar and punctuation in the folowing paragraph? Picture this, you are taking a test and the person next to you is chewing their gum loudly,so you can't concentrate. How disrespectful is that? The school board needs to make a rule no chewing

251. ## algebra

Delila has \$1200 in a saving account and in a checking account. The ratio of money in saving to money in the checking is 3 to 2. Use a system of equation to find how much money is in each account .

252. ## history

Which of the following best describes how many Europeans, living through the Great Depression, thought about political systems? a) All forms of governments are bad b) Liberalism is the best form of government c) Liberalism was in decline and

253. ## history

Anticolonial movements shared all but which of the following features? Answer A Some form of nationalism B Inspiration from traditional cultures as a means of shaping nationalism C Dissatisfaction among nationalists with their own exclusion from power D A

254. ## physics

The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above.

255. ## Math

Janna is creating a multi-tiered cupcake display for a party. She plans on having 16 cupcakes on each tier. -There is a 1-inch space between all cupcakes. -The cupcakes have a uniform width [diameter] of 3 inches. -Each tier will display the cupcakes in

256. ## Math

Idk how to do this! :( Write an equation of the line that passes through the given point and is perpendicular to the given line (1,-1), y=3x+2

257. ## chemistry

Use bond energies (Table below) to estimate H (kJ) for the following gas-phase reaction: (CH3)2CHOH(g) ==> (CH3)2C=O(g) + H2(g)

258. ## math

tell me if I am correct. In order to find the sum of the angles in a 50-gon, you have to find the number of triangle in a petagon which is 3 therefore 50-gon would have 30 triangles. then i would take 30 X 180 which would give me 5,400 degree

259. ## grammar

what is the conjunction and preposition to this sentence Deep tendon reflexes were intact with an upgoing toe on the left.

260. ## Physics

What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654m?

261. ## math

3 9/20 = write as a decimal number

262. ## Math

Write 60% as a Fraction & Write 60% as a Decimal.

asked by Mary T.
263. ## Please can help me solving my problems(Probality)

Probability that Jackson is in the office is 0.82 and probability that Alice is in the office is 0.5. The probability that Jackson is in the office given that Alice is in the office is 0.76.Find the probability that at any particular time during office

asked by Fakaapo. Suetusi
264. ## psychology

ASa scientist, Carl is concerned with intensityof lights in the modern human evviroment. In his research project,Group A consists of volunteers who have agreed to sleep each night for a week with a 150 watt light bulb hanging over their bed. Group B will

265. ## math

michael has a gallon of oil.describe two ways that michael can divide all of the oil into for containers.

266. ## geometry

If side JL = 8 cm, side LN = 12 cm and side JK = 4 cm, then what is the measure of side JM?

267. ## ALGEBRA

6y + 11x = -9 (a) Solve the equation for y. (Do not use mixed numbers in your answer.) y =

268. ## physical science 101

find the mass of water in a bath tub whose interior is 1.300m long and 0.600m wide and that is filled to height of 0.3000m (hint: the density of water =1000kg/m^3)

269. ## Chemistry help!!!!

A gas occupies 200ml volume at a pressure of 760 mm. what volume would it occupy at a pressure of 800mm.

270. ## Calculus

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Between y = −x and y = x/2 for x in [0, 6]

271. ## English

1. I lost the ring that he gave me. 2. I lost the ring that he had given me. (Which one is correct? Are both OK?)

272. ## Chemistry help!!!!

a gas occupies 200ml volume at temperature of 20C. what volume does it occupy at a temperature of -40C.

273. ## Chemistry :((((

a gas occupies a volume of 5L at a temp. of 20C and a pressure of 1atm. what volume would it occupy at a temp. of 30C and a pressure of 1.1 atm.

274. ## Geometery

A cylindrical water tank near Lisa's school is 18 meter high and has a circumference or 33 meter. The given formula can be used to determine the (v) of a cylinder?

275. ## earth

If a satalite weighs 90 kg at 10000 miles from the earth, how far away is it when it weighs 10 kg?

276. ## math

Divide 7/24 by 35/48 and reduce the quotient to the lowest fraction. A. 245/1152 B. 4/10 C. 2/5 D. 42/48

277. ## Chemistry

Is an endothermic reaction more likely to be spontaneous at a higher or lower temperature??

278. ## physics

An electron drops from the L shell to the K shell and gives off an X-ray with a wavelength of 0.0205 nm. What is the atomic number of this atom?

279. ## Math

the equation of striaght line is 2x-3y+8=0 find the equation of the straight line passing through (4,-2)and parallel to L

280. ## physics

The electron in a hydrogen atom with an energy of -0.544 eV is in a subshell with 18 states. What is the principal quantum number, n, for this atom? What is the maximum possible orbital angular momentum this atom can have? Is the number of states in the

281. ## Math

Sherry earned a 7% raise last year. If her salary is now \$27,285, what was her salary last year?

282. ## Math

It is given that the straight line passing through (2,1)and perpendicular to L.

283. ## geometry

How many more degrees in the angles of a trapezoid that in a square?

284. ## Organic Chemistry

If a student starts with 0.387 g of p-anisaldehyde and ends up with 0.265 g of methyl-E-4-methoxycinnamate, what are their theoretical and percent yields?

285. ## Chem...

1) what is the density of methane (CH4) at a temp. of 20C and a pressure of 684mm. 2) a gas has a density of 2.5g/L at a temp. of 20C and a pressure of 1.1 atm. what is its molar mass.

286. ## chemistry

what volume of hydrogen sulfide is produced by reaction of 0.5 mole of sodium sulfide with hydrochloric acid at a temp. of 20C and a pressure of 722 mm.

287. ## Chemistry!!!!!!

a correction needs to be made to the calculations for real gases as compared to ideal gases. apply these corrections and calculate the real pressure expected for 5 mole of nitrogen in a 1.5L container at a temp. of 20C.

288. ## Chemistry!!!!!!

a compound is analysed and found to have the atomic composition of C 54.5454% H 9.0909 % o 36.3636%. at a temp. of 120C and a pressure of 608 mm the density is 2.183 g/L. what is its molecular formula.

289. ## math

how many more degrees in the angles of a trapezoid than in a square?

290. ## chemistry

How do I write a balanced equation for the following...Sulfur trioxide gas is bubbled through 125ml of a 0.165M sodium hydorxide solution?

291. ## physics

Find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air.