# Questions Asked onSeptember 13, 2011

1. ## phy

A blue ball is thrown upward with an initial speed of 20.6 m/s, from a height of 0.8 meters above the ground. 2.5 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 8.2 m/s from a height of 23.7 meters above the

2. ## physics

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4.6 m/s2 for 4.4 seconds. It then continues at a constant speed for 8.5 seconds, before applying the

3. ## Chemistry (urgent)

The gold foil Rutherford used in his scattering experiment had a thickness of approximately 4×10^−3 mm. If a single gold atom has a diameter of 2.9 x10^-8cm , how many atoms thick was Rutherford's foil? Express your answer using one significant figure.

4. ## Physics

A 90 m long train begins uniform acceleration from rest. The front of the train has a speed of 21 m/s when it passes a railway worker who is standing 184 m from where the front of the train started. What will be the speed of the last car as it passes the

5. ## statistics

Based on data collected by the National Center for Health Statistics and made available to the public in the Sample Adult database, an estimate of the percentage of adults who have at some point in their life been told they have hypertension is 23.53

6. ## physics

An airplane travels 2800 km at a speed of 700 km/h, decreases its speed to 500 km/h for the next 1500 km and travels the last 1000 km at a speed of 400 km/hr. Find the average speed of the plane for the trip.

7. ## math riddles for 7th grade

what was the truck driver doing w/a load of hogs

8. ## Chemistry

You have a stock solution of 15.8 M NH3 . How many milliliters of this solution should you dilute to make 1350 mL of 0.300 M NH3

9. ## math

What 2 numbers multiply to 30 but add to 16

10. ## Chemistry

the basis of oxidation number considerations, one of the following oxides would not react with molecular oxygen: NO, N2O, SO2, SO3, P4O6. Which one is it? Why?

11. ## Physics

Problem 21.40 A pair of 10uF capacitors in a high-power laser are charged to 1.7kV. Paige Nieuwenhuis Part A - What charge is stored in each capacitor? Express your answer using two significant figures. Part B - How much energy is stored in each capacitor?

12. ## AP Chemistry

In the reaction below, 23 g of H2S with excess O2 produced 9 g of sulfur. ? H2S + ? O2 → ? S + ? H2O . What is the percent yield of sulfur? Answer in units of %

13. ## Math

Ann, Mara, Jenny, Tina, and Sue are sisters. Two of the five sisters must help their father at this business each Saturday. How many combinations of two sisters are possible?

14. ## Algebra 1

A family is having a pool built in their backyard. If their yard is rectangular and measures 7x by 6x and the pool is circular with a radius of 2x how much of the yard will be left over after the pool is built? The answer needs to in factored form.

15. ## Science

How much methanol, CH3OH (d = 0.792g/mL), in milliliters, must be dissolved in water to produce 2.15L of 0.470 M CH3OH?

16. ## Math

Ms. Poole, my PE teacher, asked the 100 seventh in my school if they could swim. Half the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?

17. ## Math Algebra 2

m1v1 + m2v2=(m1+m2)v3 find m1 If you could please explain it too or show the steps I would appreciate it.

18. ## AP Chemistry

a 5.15g sample of a hydrocarbon is burned in oxygen, producing 15.6g of carbon dioxide and 8.45g of water. Assuming an excess of oxygen, what is the empirical formula of the hydrocarbon?

19. ## Physics-Math

1.5 m3 of water is mixed with 0.50 m3 of alcohol. Density of water is 1000 kg m–3 and density of alcohol is 800 kg m–3. Whats the density of the mixture with volume 2.0 m3?

20. ## Science

Please i really need help with this!!! Question: Suppose a treadmill has an average acceleration of 4.7x10^-3 m/s. a)how much does its speed change after 5min? b)if the treadmill's speed 1.7 m/s, what will its final speed be?

21. ## physics

A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.???

22. ## physics

a moving sidewalk in an airport terminal building moves 1.00 m/s and is 150.0 m long.If man steps on at one end and walks 2.0 m/s relative to the moving sidewalk, how much time does he require to reach the opposite end if he walks in the same directions as

23. ## AP Chemistry

For the reaction ? Al + ? CuSO4 ↽⇀? Al2(SO4)3+? Cu a maximum of how many moles of Al2(SO4)3 could be formed from 5.49 mol of Al and 4.09 mol of CuSO4? Answer in units of mol

24. ## math

a farmer has enough fencing to build 40 feet of fence. He wishes to build a rectangular pen nest to his barn wall forming one side of the pen. What dimension should he make the pen so as to enclose the greatest possibility area?

25. ## physics

A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.

26. ## physics

calculate the work done in lifting a 300N weight to a height of 10m with an acceleration 0.5 m/s square.

27. ## AP Chemistry

a 5.15g sample of a hydrocarbon is burned in oxygen, producing 15.6g of carbon dioxide and 8.45g of water. Assuming an excess of oxygen, what is the empirical formula of the hydrocarbon? how do i set this problem up and how do i solve it?

28. ## math word problem

Melissa collected 3 kinds of leaves when she was out -elm, maple and oak. She has 2 times as many maple leaves as elm leaves and 5 times as many oak as elm leaves. Altogether she has 32 leaves. How many of each kind does she have?

29. ## chemistry/math problem

One cup of clam chowder contains 9g of protein, 12 g of fat, and 16 g of carbohydrates. How many kilocalories are in the clam chowder. My book says the answer is 210 but I keep getting 208 kcal.

30. ## Physics I

A stone is projected at a cliff of height h with an initial speed of 48.0 m/s directed 60.0° above the horizontal. The stone strikes at A, 5.20 s after launching. Find the height, h, of the cliff. Find the speed of the stone just before impact at A. Find

31. ## Math

In December,the average total rainfall in all of the deserts together is 0.89 mm. Explain how to use the figures from the table to write a comparison of the total desert rainfall in August and December.

32. ## physics

You throw a ball straight down from an apartment balcony to the ground below. The ball has an initial velocity of 5.25 m/s, directed downward, and it hits the ground 1.94 s after it is released. Find the height of the balcony.

33. ## science

a 600 kg toy car moving at 3 m/s collides and hooks up with a 900 kg toy car at restand they move off together. What is their final velocity?

34. ## algebra

Find a formula for the amount A of CO2 a car produces in terms of the number n of miles driven and the gas mileage G mi/gal of the car

35. ## Physics I

An Earth satellite moves in a circular orbit 770 km above the Earth's surface. The period of the motion is 100.0 min. What is the speed of the satellite? What is the magnitude of the centripetal acceleration of the satellite?

36. ## Earth

Some scientists have hypothesized that meteorites have periodically bombarded Earth and caused mass extinctions every 26 million years. How might this hypothesis be tested?

37. ## Biochem

Desribe the preparation of 2.00 L of 0.100M pH 9.00 glycine starting with the sodium chloride salt of zwitterionic glycinhe and 1.00M NaOh. If a reaction that generated 2.00 mmoles of base were carried out in 100 mL of the above buffer, what would be the

38. ## Physics- science

An automobile with an initial speed of 4.82 m/s accelerates uniformly at the rate of 2.2 m/s2. Find the displacement of the car after 5.9 s. Answer in units of m

39. ## physics

A small rock is thrown vertically upward with a speed of 13.0 from the edge of the roof of a 31.0 tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected What is the speed of the

40. ## math

Suppose that drilling into what was once a lake bottom produces a piece of wood which, according to its mass, would have contained 5 nanograms (5 billionths of a gram) of carbon-14 when the wood was alive. Use the fact that this radioactive carbon decays

41. ## physics

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 85.0 km/h, 12.0 min at 95 km/h, and 35.0 min at 30.0 km/h, and spends 35.0 min eating lunch and buying gas. Determine the

42. ## math

A farmer has 60m of fencing to make a rectangular pen for his goats. Derive an expression in simplest form, for the length of the pen

43. ## physics

A boy pulls a wagon with a force of 20N on a handle of .50 meters long. The end he holds is .25 meters higher than the end attached to the wagon. What is the magnitude of the horizontal component that acts to pull the wagon forward?

44. ## math

In 1968, the estimated population of the world was 3,559,028,982 people. When this number is written in expanded form using exponents, one power of 10 would not be represented. Which power of 10? Why?

45. ## Biology

Fats are excellent energy storage molecules because a) they have a relatively high ratio of energy storing C—H bonds. b)they have a relatively high ratio of energy storing C=O bonds. c)they are hydrophobic and do not easily mix with water. d)they have a

46. ## physics

A skateboarder shoots off a ramp with a velocity of 6.8 m/s, directed at an angle of 54° above the horizontal. The end of the ramp is 1.3 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the

47. ## Math

The organizers of of a walkathon get cost estimates from two printing companies to print brochures to advertise the event. The cost are given by the equations below, were C is the cost in dollars and N is the number of brochures. Company A: C = 15 + 0.10n

48. ## Statistics

I you are told that a data set has a mean of 25 and a variance of 0 you can conclude that A)There is only one observation in the data set B) There are no observations in the data set C)All of the observation in the data set are 25 D)Someone has made a

49. ## physics

The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car's acceleration is 4.75 m/s2. If the car's initial speed is 32.1 m/s, how long does it take to stop and how far does it travel, starting from the

50. ## Math

Mei's salary starts at \$16,000 per year with annual raises of \$1500. Janet's starting salary is \$19,300 with annual raises of \$950. After how many years will the two women be earning the same salary?

51. ## Chemistry

Consider the following unbalanced reaction. P4(s) + F2(g)---> PF3(g) How many grams of F2 are needed to produce 114 g of PF3 if the reaction has a 80.3% yield? I've worked it every way I can think, and the online grader says I am wrong. Someone plz lend me

52. ## Algebra

How many terms are in this sum? 5x-6a+8

53. ## chemistry

how many grams of O2 may be produced from 50g of KClO3?

54. ## English

We had to read the opening paragraph of "The Cask of Amontillado" and analyze it with the following questions. I really need help. I understand Montresor is going to seek revenge upon Fortunato. 1.In the first paragraph, how many characters are mentioned?

55. ## math

b is the midpoint of segment AC & its coordinate is 10. if segment BC=12, what are the coordinates of A and C?

56. ## physics

The left ventricle of the heart accelerates blood from rest to a velocity of +26 cm/s. Assume the displacement of the blood is linear and is +2.0 cm c) Determine the acceleration of the blood in cm/s2. d) How much time does blood take to reach its final

57. ## Chem 151

A solution of ammonia and water contains 3.50×10^25 water molecules and 5.00×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?

58. ## MATH(OM)

A UPS employee has a 9 hour shift, where he has on average 1 container of packages containing a variety of basic, business, and oversized packages to process every 3 hours. As soon as he processes a package he passes to the next employee who loads it on a

59. ## physics

1.5 m3 of water is mixed with 0.50 m3 of alcohol. Density of water is 1000 kg m–3 and density of alcohol is 800 kg m–3. Whats the density of the mixture with volume 2.0 m3?

60. ## Geomotry

Trapezoid TRAP with TR AP, Re, PA and P, E and A collinear

61. ## Physics

Would someone please show me a way to work this out A ball is dropped from the top of a building 150 m high. (Ignore air resistance) A. How long does it take the ball to hit the ground? B. What is the speed of the ball when it hits the ground?

62. ## hw help

there are 20 male students taking a class, if 40% of the students are males then how many students are in the class? (please show how you did it and answer)

63. ## Operations Management

Fresh Sub hires three workers during the peak hours. When customers arrive, one worker is dedicated to order taking and preparing the bread and the meat; then the customer is passed to the second worker, who asks the customer about the vegetable selection

64. ## Physics

Which of the following is an example of projectile motion? a jet lifting off a runway a thrown baseball an aluminum can dropped straight down into the recycling bin a space shuttle being launched I think it's b, but I'm not sure.

65. ## PHYSICS

Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 79 km/h, while car B travels at a constant speed of 89 km/h. How far is Car A from school 1.6 h later? Answer in units of km IT'S NOT

66. ## physics

A 3.56 x 10-5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 83.8 m, what is the work done by gravity? Answer in units of milliJoule (a thousandth of a Joule) and use 9.8 m/s2 for

67. ## AP Chemistry

A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

68. ## Pre-Agbra

what is 0.9 divided by 1000

69. ## Howard Hall

Mario's locker number is between 80 and 99. The sum of the digits is 13. The tens digit is 3 more than the ones digit. What is Mario's locker number?

70. ## PRE-CALCULUS

INSERT THE SEVEN ARITHMETIC MEANS BETWEEN 3 AND 9

71. ## Physics

A 12kg blcok sits on a table. A 10 kg block sits on top of the 12kg block. What is the force the table exerts on the 12kg block. Please explain any answer.

72. ## chemistry

Assume you drank 240mL of coffee at 80degrees C and that this amount was cooled by your body to the normal 37 degrees C. How many calories were supplied to your body? Assume that the coffee is essentially hot water with a density of 1.0g/mL

73. ## Geometry

Sketch, label, and mark each figure. Rhombus RHOM with acute

74. ## American Gov

The Framers’ concerns about direct democracy are well illustrated by the fact that the U.S. Constitution does not feature the word “democracy” at all. T or F

75. ## MATH

A child organizes animal blocks in rows on the ground. There are 64 animal blocks in the 5th row & 92 of those blocks in the 9th and last row. Suppose that the number of animal blocks frm row to row form an arithmetic sequence. The number of animal blocks

76. ## SCIENCE

A cyclist maintains a constant velocity of 5.2 m/s headed away from point A. At some initial time, the cyclist is 257 m from point A. What will be his displacement from his starting position after 47 s?

77. ## Math

The value of 25 coins, consisting of dimes and quarters, is \$ 3.55. How many dimes are in the collection?

78. ## Math

The organizers of of a walkathon get cost estimates from two printing companies to print brochures to advertise the event. The cost are given by the equations below, were C is the cost in dollars and N is the number of brochures. Company A: C = 15 + 0.10n

79. ## spanish/chech

translate to spanish our father's office -la oficina de nuetro padre 2-translate the possesine adjective in parentheses into spanish -su escuela(their) can you check my answer thank you

81. ## physics

The summit of a mountain, 2082 m above base camp, is measured on a map to be 4582 m horizontally from the camp in a direction 32.4° west of north. Choose the x axis east, y axis north, and z axis up. What are the components of the displacement vector from

82. ## chemistry

e) In performing an immunological procedure, you add 2 mL of serum to 8 mL of saline. Two 1:2 serial dilutions are then made. What is the dilution of serum contained in the final tube?

83. ## college algebra

Perform the indicated operation(s) and express the result in standard form. Leave answers in terms of square roots (do not use decimals). (-9-sqrt-3)^2

84. ## chemistry

In performing an immunological procedure, you add 2 mL of serum to 8 mL of saline. Two 1:2 serial dilutions are then made. What is the dilution of serum contained in the final tube?

85. ## chemistry

During lab, you are provided with a stock antibody solution (Ab) that has a concentration of 400 μg/μl. For lab, it is necessary make the following dilutions (Fill in the blanks): 5μL of Stock Ab + 195μL of buffer to make a 1:____ dilution at

86. ## physics

The driver of a car is initially moving at a constant speed of 76.0 km/h when a traffic light turns red. If a 0.455 s reaction time is required before the brakes can be applied, what is the distance in meters traveled by the car before it begins to slow

87. ## physics

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 85.0 km/h, 12.0 min at 95 km/h, and 35.0 min at 30.0 km/h, and spends 35.0 min eating lunch and buying gas. Determine the

88. ## chemistry

g)How many grams of agarose are needed to make 100 ml of 2.5% agarose solution?. h) Calculate the volume of buffer to which 500mL of 40 mM potassium chloride solution must be diluted to make a new concentration of 0.001M.

89. ## world history

The most important contribution the Mongols made to encouraging trade along the Silk Roads was A. building permanent inns for travelers. B. building a permanent road. C. lowering taxes for merchants. D. providing security.

90. ## Networking

Assume that an average SNMP response message is 100byte long. Assume that a manager sends 40 SNMP Get commands each second. What percentage of a 100 Mbps LAN link’s capacity would the resulting response traffic represent?

91. ## Math Formula Part 2/3

I've done the second part to the Math Formula post. It was determine the 19th term of the sequence which I did. Now it says..which of the numbers -268 and -350 are terms of the sequence? I was doing something like this: tn = -7 (-268) +19 I was plugging

93. ## accounting

a company issues 7% 10 year bonds with a par value of \$150,000 and semi annual payments. On the side date the annual market rate for these bonds are 8%, which implies a selling price of 93 1/4 the straight line is used to allocate interest expense what is

94. ## Math Graphing

Consider the linear function with equation y = 3x + 5. Sketch the graph of the linear function on the grid. h t t p : //img402 . imageshack . us/img402/1466/picture38c . j p g Here is a picture of the graph, and this is how I did it. h t t p : //img9 .

95. ## Algebra

The difference of two integers is 9. Five times the smaller is 7 more than three times the larger. Find the numbers.

96. ## chemistry

how many molecules of O2 may be produced from 50g of KClO3? the formula is 2KClO3->2KCl+3O3

97. ## Statistics

I have two boxes with balls; box #1 and box #2. Box #1 has 3 red balls and 2 blue balls.Box #2 has 7 red balls and 3 blue balls. what is the probability that if a red ball is picked, it is from box #1

98. ## Chemistry

Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 2.970-g sample of Mg metal is added to 50.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many grams of H2 are formed?

99. ## physics

A cyclist maintains a constant velocity of 5.4 m/s headed away from point A. At some initial time, the cyclist is 250 m from point A. What will be his displacement from his starting position after 86 s? Answer in units of

100. ## Math

Round 0.000453 to the nearest thousandth.

101. ## physics

could someone please break this down and show me how to do it? A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the

102. ## Anatomy

I'm posting this again today hoping someone can clarify this for me- I have two question 1.In a dehydration synthesis reaction which of the following occur- a. hydrogen and oxygen are removed from the reactant b. water is added to the reactants c. water is

103. ## physics

find the work done ,if a weight of 25kg is lifted through a vertical height of 2m from the ground and it is raised to same place by pushing up an inclined plane making an angle of 30 degree with ground .neglect friction.

104. ## histroy

all powers not delegated the united states by the constitution..are reserved to the states respectively or by the people "this language drafted by____and incorporated into the____amendment bill of rights was intended to adress the concerns of the

I'm posting this again today hoping someone can clarify this for me-I've posted it prior but no one answered yesterday so I'll try again. Thank you in advance I have two question 1.In a dehydration synthesis reaction which of the following occur- a.

106. ## MATH Graphing Domain

Consider the linear function with equation y = 3x + 5. Sketch the graph of the linear function on the grid. h t t p : //img402 . imageshack . us/img402/1466/picture38c . j p g Here is a picture of the graph, and this is how I did it. h t t p : //img9 .

107. ## Earth/Space Science

Some scientists have hypothesized that meteorites have periodically bombarded Earth and caused mass extinctions every 26 million years. How might this hypothesis be tested?

108. ## statistics

draw a tree with elements(50,33,44,22,77,35,60,40)respectively inorder

109. ## Physics

Superman throws a boulder of weight 3500 N at an adversary. What horizontal force must Superman apply to the boulder to give it a horizontal acceleration of 12.7 m/s^2? F=? Fnet(x)=MA(x) I did (3500 N)(12.7 m/s^2) = 44450 N This answer is wrong. So what's

110. ## chemistry

You add a pint of STP gas treatment to a 10 gallon fuel tank, and half fill the tank with gas. What is the dilution factor? (Hint: there are 8 pints/gallon)

111. ## English

1. The dog is black and white. 2. The dog is blown. 3. One is a black and white dog and the other is a blown dog. 4. It's ten to twelve. 5. It's ten before twelve. 6. It's ten past twelve. 7. It's ten after five. (Are the sentences all grammatical? Have a

112. ## math

A right triangle with sides in the ratio 3:4:5 has one side length of 60. What are the possible lengths of the other sides? (My teacher asked for a "let x represent" statement here but I'm not sure how to do that... is there a way? If so, please, do tell~)

113. ## chemistry

calculate the number of moles of gaseous N2 contained in a sample of 300 ml of gas saturated with water vapour at 25 degree celcius and 95 kPa.

114. ## Astronomy

Few question about astronomy: 1.how many centimetres is equivalent to a light-nanosecond 2. How long is an astronomical unit (AU) in light-minutes (1min, i.e., the distance that light travels in a vacuum in one minute)? Please show the calculation if there

115. ## physics

An elevator is initially moving upward at a speed of 12.84 m/s. The elevator experiences a constant downward acceleration of magnitude 3.80 m/s2 for 3.18 s. (a) Find the magnitude and direction of the elevator's final velocity. magnitude: direction:

116. ## spanish/check

translate to spanish our father's office -la oficina de nuetro padre 2-translate the possesine adjective in parentheses into spanish -su escuela(their) can you check my answer thank you

117. ## Math Help

A child organizes animal blocks in rows on the ground. There are 64 animal blocks in the 5th row & 92 of those blocks in the 9th and last row. Suppose that the number of animal blocks frm row to row form an arithmetic sequence. The number of animal blocks

118. ## physics

An electron, starting from rest and moving with a constant acceleration, travels 4.7 cm in 5.2 ms. What is the magnitude of this acceleration? Answer in units of km/s2

119. ## 7th grade Lang. Arts

Fill the blanks with one of these words 1) The hurricane so________________a large section of the coast that the president declared it a disaster area. 2) Since I sincerely appreciate all my parents have done for me, how can you accuse me of______________?

120. ## Math Block Problem

A child organizes animal blocks in rows on the ground. There are 64 animal blocks in the 5th row & 92 of those blocks in the 9th and last row. Suppose that the number of animal blocks frm row to row form an arithmetic sequence. The number of animal blocks

121. ## jones

alexandra drove 8 hours to visit he grandmother. if she avereged 55 miles per hour for the trip , how far did she drive?

122. ## social studies

what is the patriot act? why is it controversial? should the guantananamo prison? why or why not? if so , what do you think should happen to th detainees there?

123. ## English

Thank you very much. Could you please check these other sentences? (word choice, reporting verbs) 1) European law says that animal testing cannot be used for beauty and cleaning products. Those who support animal testing say that it is a necessary evil

124. ## physics

I need help with this question. A car travels along a straight and level road at a constant speed of 6.2 m/s. Calculate how long (in seconds) it will take the car to travel a total distance of 262.4 miles along this road.

125. ## Math

In Janis class, half of the students are girls and 60% of the students have brown eyes. If a student is chosen at random, what is the probability that the student will be a girl with brown eyes?

126. ## english

Imagine being an explorer who leaves his country to seach the world.

127. ## English

Could you please check these two sentences, please? 1) Water chute and spring board don't have the same meaning, but I think I can use them both with "dive into the water". 2) Superman was both a superhero endowed with superpowers and a shy and insecure

128. ## math

A school’s gym lockers are numbered from 1 to 150. How many lockers have numbers that contain the digit 6?

129. ## geometry

the bases of isosceles trapeziod abcd are 17 and 25cm and its base angles are 45 degrees. find the height of the trapezoid

130. ## calculus

Question Part Points Submissions Used What is the percentage increase in size when ordering a 14-inch rather than a 12-inch pizza?

131. ## English

Can you check if everything is correct? 1) Pogo jumped onto a table near the window and knocked over (which synonyms are possible? overturned, tipped over, bowled over, tumped over?) the clock. 2) The clock went through the window, landed on the roof of

132. ## Word Problems

Will someone please write an expression for these? I am horrible at this, i will solve them though. 1.) Logan withdrew \$32 from her bank account. After her withdrawal, her balance was \$8. How much was originally in her account? 2.)The baseball birthday

133. ## hw help

A sample of air was found to contain 21% oxygen by volume. how many ml of oxygen are present in 2.0 L of air?

134. ## math

explain how you can find the sum 25 + 59 without paper, pencil or calculator. Find the sum? How do I do this

135. ## chemistry

Iron reacts with HCl solution to give H2 gas and Fe2+ ions. Suppose that 5.4 g of iron are to be dissolved in 1.1 M HCl. What is the minimum volume (in mL) of the acid solution required to react with all of the iron?

136. ## physics

1. A cyclist maintains a constant velocity of 5.2 m/s headed away from point A. At some initial time, the cyclist is 257 m from point A. What will be his displacement from his starting position after 47 s? Answer in units of m 2.What will be his position

137. ## science

While John is traveling along an interstate highway, he notices a 170 mi marker as he passes through town. Later John passes a 117 mi marker. What is the distance between town and John’s current location?

138. ## math

Cigarette Use A study by the Partnership for a Drug-Free America indicated that, in 1998, 42% of teens in grades 7 through 12 had recently used cigarettes. A similar study in 2005 indicated that 22% of such teens had recently used cigarettes. (a) Write a

139. ## Math

Cole can use the fomrula c=3.99n to find the cost c of buing n notebooks . if Cole has \$15 to spend, which is a reasonable range for c=3.99n?

140. ## geometri

i need the distances from AB, BC, CD, and AD but i know CD=10 and AB=5BC and AD=2AB

141. ## chemistry

your making 150000 moles of fertilizer, how many moles of CH4 do you need?

142. ## Science

How do I determine the amount of electrons in highest occupied energy level? Thanks The elements in Carbon-12, Atomic Number =6, Neutron 6, Electron=6, and Proton= 6. How would I find the electrons in highest occupied energy level?

143. ## Science

How many moles of H2(g) will be formed in the reaction between 0.99 mol CaH2}(s) and 1.32 mol H2O(l)?

144. ## Physics

A rocket is launched from rest. After 8.0 min, it is 160 Km above the Earth’s surface and is moving at a speed of 7.6 Km/s. Assuming the rocket moves up in a straight line, what are its (a) average velocity and (b) average acceleration?

145. ## BUS 323

I need assistance in locating information on the following. I do not have the textbook. Identify reasons why a person would be interested in being ethical, and classify those reasons in terms of whether they represent moral motivation or economic

146. ## chemistry

a) How many micrometers make 0.4 m? b)How many µg in 4.732 mg?

147. ## physics

Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 79 km/h, while car B travels at a constant speed of 89 km/h. How far is Car A from school 1.6 h later? Answer in units of km

Evan is 1.8 metres tall. He walks between two lampposts that are 5 metres apart and notices his shadow from one of the lampposts just touches the base of the other. He also notices that the ratio of his height to the height of the lamppost is 2 to 5. How

149. ## chemistry

You diluted a bacterial culture 106, plated out 200 µL and found 38 colonies on the plate. How many bacteria/mL were in the original undiluted culture?

150. ## chemistry

How many molecules of NH3 could be generated from 64 molecules of N2 and 210 molecules of H2? How many molecules of N2 and H2 would be left over after the reaction?

151. ## help! due tommorrow

an assortment of coins contains 20 pennies, 2 nickels and 6 dimes what percentage of the coins are nickels? ( in the book the answer says 7% nickels) i want to know how to work out the problem

152. ## ENDOCIRNE SYSTEM

HOW ENDOCRINE SYSTEM FUNCTION

153. ## physics

If a stone is thrown upward at 20.5 m/s, what will be its velocity at a height of 12 meters?

154. ## Quantitative Analysis

The density of a 50-%(w/w) solution of NaOH is 2.0 g mL-1. How much of this solution is needed to prepare 1.0 L of 0.10 M NaOH?

155. ## Chemistry

Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.890-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many grams of H2 are formed?

157. ## Math

A boat weighs 1500 lb more than its motor and 1900 lb more than its trailer. Together the boat and motor weigh five times as much as the trailer. How much does the boat weigh?

158. ## social studies

Many critics say the human cost of the war in iraq and afghanistan was borne by just a few.should there be a national service requirement for all young americans??

159. ## life orientation

provide recommendation on how to address this environmental problem(hiv)

160. ## Alegaba 2

Two sides of a triangles are equal in length. the length of the third side is three meters less than the sum of the lengths of the other two sides. What is the length of the longest side of the trangle if its perimeter is 29 meter?

161. ## college itro to sociology

Write a paragraph (8-12 sentences) describing an experience where your sociological perspective changed your perception of what was going on. How did this even affect your life? Why is the concept of Sociological perspective (imagination) important in

162. ## physics

The figure below shows a room which is h = 8.5 feet tall and r = 14.5 feet wide. Attached to the ceiling is a piece of glass (with unknown index of refraction) which is 3.9 feet thick. A laser pointer in the bottom left corner is aimed so that the ray

163. ## science

describe 2 different ways to find the volume of an object. why might you choose to use on method or the other?

164. ## English

I can’t find appropriate synonym. In particular, I find it difficult to rephrase the following verbs: knock over, smash through and bounce through. Can you please help me??? Thank you. 1)Mr. Powell is counting the cost (synonym) after a teenage

165. ## chemistry

How many grams of sodium were isolated from the decomposition of 0.0292 moles of Na2O, if the reaction occurred with a 44.9% percent yeild? 2 Na2O(s) --> 4 Na(s) + O2(g)

166. ## College Physics

Vector Algebra let A vector=6ihat+3jhat, B vector= -3ihat-6jhat D vector=A vector-B vector what is D vector? Thank You!

167. ## MATH Word Problem

A child organizes animal blocks in rows on the ground. There are 64 animal blocks in the 5th row & 92 of those blocks in the 9th and last row. Suppose that the number of animal blocks frm row to row form an arithmetic sequence. The number of animal blocks

168. ## help!!!!!

1. A sample of air was found to contain 21% oxygen by volume. how many ml of oxygen are present in 2.0 L of air? 2. A 25.0g solution containing salt and water is 2.2% salt by mass. what is the mass (in g) of salt in the solution? please show me how to

A piece of copper contains 3.6 x 10^8 atoms. What is the volume of the sample in units of liters? I know that first you have to get atoms to cancel out but them I do not know what to do.

170. ## Algebra

I do not get this at all, please help me. I know we cannot post links, but I uploaded the picture of my homework here: ht tp: //img560 .imageshack. u s/ img5 60/994/hom eworkc.jpg DELETE THE SPACES PLEASE AND THANK YOU.

171. ## geometry

If the slope of a line is 5/3 and a point on the line is (57,12) using the given point and the slope find the coordinates of the lattice point on the line?

172. ## Math Formula--General Term

Consider the sequence 12, 5, -2, -9 Determine the formula for the general term of the sequence: tn = a + (n-1)d tn = 12 + (n-1)-7 tn = 12-7n + 7 tn = -7n + 19 I got -7n +19 as the answer, but at the back of the book, it says.. tn = 19-7n. I have no idea

173. ## Math

John withdrew \$ 500 out of his bank savings account. He spent \$ 50 on a radio, and 3 / 5 of what remained on gifts for his friends. How much money did John spend on gifts for his friends?

174. ## algebra

For all positive integers x, let x▲ be defined to be (x-1)(x+1). Which of the following is equal to 6▲ - 5▲ ? Does this mean I'm supposed to multiply the 6 and the 5 to (x^2-1) and subtract them from each other?

175. ## Math

The difference of two integers is 9. Five times the smaller is 7 more than three times the larger. Find the numbers.

176. ## Physics

Find the density in g/cm3 of a 120 cm3 piece of metal having a mass of 2 kg.

177. ## math

Find the product and enter the real and imaginary parts below. Note that you do not need to type in the since it is already given to you. Simplify your square roots as much as possible. sqrt-27((sqrt-5)-(sqrt-11))

178. ## aig

where are some cites we can find some great information about the pacific island samoa???

179. ## Geomatry

What is the value of the variable and BC if B is between A and C. AB=4x BC=5x AB=16

180. ## chemistry

require 400 mL of a 0.4 M NaOH solution and you have a 1.2 M stock solution. How would you make up the solution?

181. ## chemistry

How many molecules of NH3 could be generated from 64 molecules of N2 and 210 molecules of H2? How many molecules of N2 and H2 would be left over after the reaction?

182. ## physics

a chain that can support 2000 N is suspended between two trees. a 200 kg motor hangs from the middle. the slack in the chain makes the half slant upward 20 degrees. will the chain break?

183. ## science

I have a question I was wondering if someone could give me a link or idea how to find the answer: What structure on HIV makes it necessary for the virus to be transmitted in moist secretions?

Clue 1: i am greater than 100,000, but less than 120,000. Clue 2: I am divisible by 3. Clue 3: The sum of my digits is 6. Please expalin answer. Thank you.

185. ## algebra

10 = X/4 -8 X OVER FOUR IS A FRACTION

186. ## Social Studies

I need a topic sentence for my intro on technological innovation. Am doing it on Airplanes. I've started my topic sentence: Over the last century, technology has advanced very quickly. One technological innovation i felt was very important is Airplanes.

187. ## physical science

A car travels at a constant speed of 60 km/h for 3.5 hours. What is the total distance that the car has traveled?

188. ## Math

Mrs. Hansen has 84 yards of material available to make school uniforms. Each uniform requires 3 / 4 yard of material. How many uniforms can be made?

189. ## Math

The value of 25 coins, consisting of dimes and quarters, is \$ 3.55. How many dimes are in the collection?

190. ## chemistry

arrange the following subshells in order form lowest to highest energy: 4s 4p 4d 4f

191. ## American Gov

According to the text, when economic or occupational self-interest is at stake, most people press for programs that serve the broader interests of the nation as a whole. True or False

192. ## American Gov

Capitalism is an economic system based on public ownership of property and a command economy True or False???

Consider the following statement: Most disagreements or differences of opinion are more often a result of faulty, misunderstood, or confusing premises, rather than faulty reason from a valid premise. Would you agree or disagree with this statement?

194. ## chemistry

calculate the molarity of a solution containing 0.5050 mol of solute in 400.0 ml of solution

195. ## science

talking on your cell pohon e in your beddroom, when suddenly the reception goes bad for a minute

196. ## Biology

Can someone tell me what I can look up to find the cell that is abundant in pus?

197. ## chemistry

an assortment of coins contains 20 pennies, 2 nickels and 6 dimes what percentage of the coins are nickels?

198. ## math

How to choose the correct symbol to place between decimal and fraction.

199. ## US History

What was Jackson's basic view of of the Native Americans living in the American Southeast.

200. ## AP Chemistry

What is the weight of 6.3 × 10 21 atoms of phosphorus? Answer in units of g

201. ## Chemistry

Ejected neutrons sustain the fission reaction by serving as reactants to split additional fissionable nuclei, which roduce additional neutrons, which can slit additional dissionable nuclei, and so on. The result is a what???

202. ## math

John's father works in Franklin. It is 39 miles from Franklin to his home. If he leaves work at 7:20 P.M.and travels an average speed of 43 m/hr., at what time will he get home? Please explain.

203. ## pre algabra

write 20h/24h in its simplest form

204. ## Physics

Problem 21.79 The plates of a 3.2 nF parallel-plate capacitor are each 0.25 m^2 in area. Part A - How far apart are the plates if there's air between them? Express your answer using two significant figures. Part B - If the plates are separated by a Teflon

A piece of copper contains 3.6 x 10^8 atoms. What is the volume of the sample in units of liters? I know that first you have to get atoms to cancel out but them I do not know what to do.

206. ## Math

At 4 p.m., what part of a day has elapsed?

207. ## physics

You are the first person to land on the planet Mars where the gravitational acceleration is 3.71 m/s2. You jump with joy with an initial speed of 4.30 m/s. How high do you rise above the martian surface?

208. ## movie question

Is the armageddon movie based on a true life story?

209. ## childcare

The main difference between emergency care and first aid is the

210. ## college physics

I know you need to use geometry but i don't know how a room which is h = 9.0 feet tall and r = 12.0 feet wide. Attached to the ceiling is a piece of glass (with unknown index of refraction) which is 2.5 feet thick. A laser pointer in the bottom left corner

what are the divisidles rules

212. ## college algebra

Find the product and enter the real and imaginary parts below. Note that you do not need to type in the since it is already given to you. Simplify your square roots as much as possible. sqrt-27((sqrt-5)-(sqrt-11))

213. ## healthcare management

Many American hospitals have wound up employing family practice physicians or establishing contract management arrangements for their practices. Most hospitals that employ doctors have found that they are losing money on office operations. In essence, the

214. ## english

I've been doing some research on Obama's financial advisor Alan Kruger, and I wanted to find out broadly what his stand/view is on poverty or the financial crisis. I've searched a few links but I can't find what I'm looking for. Can I please get some

215. ## Physics

A block of mass M=1.0 kg is dragged over a horizontal surface by a force F=20.0N. The block is displaced a distance d=10.0 m, the friction force Ff is 5.0 N. What is the work done by the weight Fg?

216. ## physics

A car traveling initially at 9.52 m/s acceler- ates at the rate of 0.609 m/s2 for 3.62 s. What is its velocity at the end of the accel- eration?

217. ## chemistry

How would you dilute a 2 mg/mL NaCl stock standard to make 100 ml of a 50 mg/dl standard?

218. ## physics

Find the velocity in m/s of a dropped ball after 2.4 seconds in the air. Assume its initial velocity is zero. Round answer to one decimal place.

219. ## math

what are the rules to adding and subtracting negative numbers and positive numbers?

220. ## Pre Calculus

factor completely 1. x^3-9x^2 2. 36x^6-49x^4

221. ## Algebra

Solve for y x-2xy=1

222. ## Pre Calculus

Factor Completely a. 3x^8-3x^6 b. 20a^2b^2x^2-45a^2b^2y^2

223. ## math

what is the rule for input 36 output 9 input 17 output 9 input 24 output1 input 18 output 0

224. ## hellppp

an assortment of coins contains 20 pennies, 2 nickels and 6 dimes. what percentage of the coins are nickels? show how is solved ?????????

225. ## MATH

in rectangle ABCD:points J,K,L and M are the mid-points of sides AB,BC,CD and DA respectively: AB=24cm andAD=10cm . what kind of quadrilateral is JKLM?

226. ## Physics

You compress air saturated with water vapor at 24°C and atmospheric pressure (101.325 kPa) until the total pressure is doubled and the temperature is 36°C. What is the final pressure of the water vapor?

Clue1: i am greater than 500 but less than 1,000. Clue2: My square root is a square number. Also please explain your answer. Thank you.

228. ## chemistry

What are the oxidation states of chromium -6(Cr^+6).

4b + 6 = -2

230. ## science

what is LNSCUOICNO unscrambled

231. ## Math

What is the estimate quotient for 148 and 31?

232. ## MATH HELP!!!!

Give the range of numbers that will round to: 60 700 580 2300

233. ## college algebra

The goal of this problem is to solve the equation by completing the square. x^2-9x+14=0

234. ## Chemistry

Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.890-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many grams of H2 are formed?

235. ## Biology

is the reaction of calcium chloride with sodium carbonate ionic or covalent

236. ## Physics

A ball is thrown straight up and rises to a maximum height of 24 m above the ground. At what height is the speed of the ball equal to half of its initial value? Assume that the ball starts at a height of 1.9 m above the ground.

237. ## math

Add 12 and 2 tenths and 32 hundreths I need to write out the problem and solve

238. ## Language A

How did Crispin get into the palace? Name of the Book: Crispin The Cross of Lead

239. ## hcc

I need help designing a program for a sales tax on a package of items that cost \$45.75. this is my computer science class

240. ## social studies

name all the states that have gulf of mexico coastline.

241. ## American Gov

True or False: All societies have differences. Politics provides ways to resolve differences without resorting to violenceor

242. ## Computer Science

An advertising agency wants to send a letter to all of its clients announcing a new fee schedule. The clients' names are in several different lists (arrays). The company merges the various lists to form one array, but clients could be listed in the array

243. ## biology

explain how organisims have evolved physiologically to become suited to its environment

244. ## Socials Oppostion

Whats the primary function of d opposition in the HOC ( house of commons) ? To make the government more accountable?

245. ## Pre Calculus

FACTOR COMPLETELY 1) x^8-y^8

246. ## algebra

10x.12.25y _______________ 2z.30x.20y help

247. ## algebra

list the intercepts and test for symmetry y = x^4 + 1 divided by 2x^5

248. ## calculus

horizontal asymptote of (x^2-16x+63)/(3x^2-7x+12)

249. ## College Algebra

Annual profit in thousands of dollars is given by the function, P(x) = -.1x2 + 50x - 300, where x is the number of items sold, x ≥ 0. describe the meaning of the number -.1 in the formula, in terms of its meaning in relation to the profit. describe the

What is the weight of 6.3 × 10 21 atoms of phosphorus? Answer in units of g

251. ## math

Polynomials: -5a3power (4a4power – 3a + 1)

252. ## mandarin

what is go to the toilet in mandarin/

253. ## science

How do you make a model of a reproductive system, this is my daughters' year 7 science homework? Any suggestions for what to use to represent each part?

254. ## math

Is 7/8 or 11/10 closer to 1? How?

255. ## LA

I need a topic sentence for my intro on technological innovation. Am doing it on Airplanes. I've started my topic sentence: Over the last century, technology has advanced very quickly. One technological innovation i felt was very important is Airplanes.

256. ## math math

How do you write the solution to represent the point if intersection?

257. ## math

Perform the indicated operation(s) and express the result in standard form. Leave answers in terms of square roots (do not use decimals). (-9-sqrt-3)^2

258. ## English

I need some help to explain this sentence: "Suddenly summoned to witness something great and horrendous, we keep fighting not to reduce it to our own smallness." from John Updike

259. ## childhood education

In what ways does the program provides quality care to their childhood caregivers.

260. ## IT(information technology)

hi I have an IT assignment to do it is about a cipher.Can you help me to write out an java program about any cipher.I have tried out an program but it is not working.

261. ## MATH

25 METERS IS EQUAL TO HOW MANY GIGAMETERS

262. ## College Math

1. The posted speed limit on many US highways is 65 miles per hour. What is this speed in feet per second? 2. 3(3/4) yd is equal to how many inches?

263. ## Algebra II

hold the temperature constant and vary the relative humidity. Fix the temperature at 30 degrees Celcius and graph I vs R on your calculator. describe your results and the window that you used

264. ## Math

|-4.8 - (7.2)|

what is Hemophilia? please explain thanks

266. ## science

Have a crossword puzzle An element found in nature. second letter a last letter l seven letters total

267. ## English

I left out the following sentence. Complete the following fill-in-the-blank activity using as many synonyms as possible.

268. ## Math

polynomials, (6a - 3)(4a - 1)

269. ## math

Add 12 and 2 tenths and 32 hundreths I need to write out the problem and solve

270. ## physics

one of the factors that limits the reach of a crane is the moment created by the load, measured with the respect to an axis A at the base of the front support. if the boom shown is 30m long, and at an angle of 25 degrees with the horizontal, determine the

271. ## Math

When using the elimination method does it matter which variable you choose to eliminate? How do you write the solution to represent the point if intersection? I guess it doesnt matter

A Texas horned lizard laid 37 eggs in one place. To the nearest ten, about how many eggs did the lizard lay?

what are the divisidles rules

274. ## MATH

give a range of numbers that round to: 60 700 580 2300

275. ## English

what is John updike`s message in this paragraph? The next morning, I went back to the open vantage from which we had watched the tower so dreadfully slip from sight. The fresh sun shone on the eastward façades, a few boats tentatively moved in the river,

276. ## math

what is 6% of 2,500?

277. ## math

Evan is 1.8 metres tall. He walks between two lampposts that are 5 metres apart and notices his shadow from one of the lampposts just touches the base of the other. He also notices that the ratio of his height to the height of the lamppost is 2 to 5. How

278. ## math

Given two coordinate points like (3,-8) and (8,2) for example how do you find the y intercept?

279. ## comtech

what are unity and depth?

280. ## Math

A triangle has a perimeter of 35inches. The length of side a of the triangle is twice the length of side b. Side c is 5inches longer than side a. What is the length of each side of the triangle?

281. ## biology

Relate the various levels of organisms to those of nonliving entites. Use specific examples to explain your answers?

282. ## Science

what is the difference between water vapor and clouds?

283. ## math

polynomials (8m + 7) (2m +3)

284. ## algebra 11

How do you write the solution to represent the point if intersection?

285. ## childhood education

In what ways does the childcare centre provides quality care to their caregivers.

286. ## Math

what is 1/2 or 1 over 2 multiply by 6?

287. ## bis 245

tco2 to create a relationshio between two tables, you need at least a

288. ## precalc

convert into equation with 0 on right hand side sq route (x+6) = 6-2 sq route (5-x)

289. ## math

polynomials (3x + 1)(2x - 5)

290. ## Math

polynomials (2z - 7) (-z + 3)

291. ## Math

a(3a + 1) + (a + 1)(a-1)

292. ## math

polynomials (m + 7)(m - 3) + (m-4)(m+5)