# Questions Asked onAugust 19, 2010

1. ## physics

A 0.060 kg tennis ball, moving with a speed 2.50 m/s, collides head on with a 0.090kg ball initially moving away from it at a speed of 1.15 m/s. Assuming a perfectly elastic collision, what are the speed and direction of each ball after the collision?

2. ## The elements and Principles of Design

CAN SOMEONE PLEASE CHECK MY ANSWERS. (MY ANSWERS ARE AT THE BOTTOM...) 1. Which one of the following factors is one of the principles of design? A. Form C. Pattern B. Color D. Balance 2. Of the following expressions, which best describes the concept of

3. ## college physics

A 0.25 kg skeet (clay target) is fired at an angle of 30 degrees to the horizon with a speed of 25 m/s. When it reaches the maximum height, it is hit from below by a 15 g pellet travelling upward at a speed of 200 m/s. The pellet is embedded in the skeet.

4. ## physics

A spring with k = 53 N/m hangs vertically next to the 15 cm mark on the ruler. If a 2.5 kg mass is now attached to the end of the spring, where will the end of the spring line up with the ruler marks

5. ## statistics

Given the following scatter diagram , the sample correlation coefficient r: Has a positive linear correlation Has a negative linear correlation. Has little or no correlation. Looks close to + 1.00

6. ## Math Calculus

Three sides of a fence and an existing wall form a rectangular enclosure. The total length of a fence used for the three sides is 240 ft. Let x be the length of two sides perpendicular to the wall as shown. Write an equation of area A of the enclosure as a

7. ## physics

[20 pts] A 2.00 kg block is pushed against a spring with negligible mass and force constant k = 400 N/m, compressing it 0.220 m. When the block is released, it moves along a frictionless, horizontal surface and then up a frictionless incline with slope 37

8. ## physics

You drop a ball from a height of 2.0 m and it bounces back to a height of 1.5 m (a) What fraction of its initial energy is lost during the bounce? (b) What is the ball’s speed just at it leaves the ground after the bounce?

9. ## Math

Question: A tunnel with a parabolic arch is 12 m wide. If the height of the arch 4 m from the left edge is 6 m, can a truck that is 5 m tall and 3.5 m wide pass through the tunnel? Justify your decision. I drew the graph of the arch with x-intercepts (0,0)

10. ## chemistry

When 10.0 mL of 0.012 M Pb(No3)2 is mixed with 10.0 mL of 0.030M KI, a yellow precipitate of PbI2(s) forms. a. Calculate the molarity of [Pb2+] b. calculate the initial molarity of [I-] c. On measuring the equilibrium concentration of [I-] it cam out to be

11. ## chemistry

what mass of a 15% (m/m) NaOH solution contains 125 grams NaOH?

12. ## Programming

Submit pseudocode and a flowchart for the following programming exercise: Fat Gram Calculator Design a program that asks for the number of fat grams and calories in a food item. Validate the input as follows: - Make sure the number of fat grams and

13. ## Algebra 2

HELP!!! 1. Having a x-intercept of -4 and parallel to the y-axis. How do i write this equation in standard form?

14. ## physics

A 0.25 kg skeet (clay target) is fired at an angle of 30 degrees to the horizon with a speed of 25 m/s. When it reaches the maximum height, it is hit from below by a 15 g pellet travelling upward at a speed of 200 m/s. The pellet is embedded in the skeet.

15. ## math

graph the equation by plotting the points: 35-5y=0 i know how to put the solutions on the graph. i am stuck on this equation. i think x=0 but i can not figure for y. please help me and show me the steps to solve this.

16. ## science

Geologists have divided the history of the earth into four different eras. Which era below is not one of the four? a) Mesozoic Era b) Cenozoic Era c) Precambrian Era d) Stone Era e) Paleozoic Era Just need to know if my answer or right or wrong. Thanks! :)

17. ## Physics - Projectile Motion

While Hiking in the wilderness, you come to the top of a cliff that is 60.0m high. you throw a stone from the cliff, giving it an initial velocity of 21m/s at 35deg above the horizontal. How far from the base of the cliff does the stone land? (85m) I tried

18. ## Math

Choose the one alternative that best completes the statement or answers the question. Solve the problem. Assume that simple interest is being calculated in each case. Round your answer to the nearest cent. Martin takes out a simple-interest loan at 7.5 %.

19. ## physics

A 0.25 kg skeet (clay target) is fired at an angle of 30 degrees to the horizon with a speed of 25 m/s. When it reaches the maximum height, it is hit from below by a 15 g pellet travelling upward at a speed of 200 m/s. The pellet is embedded in the skeet.

20. ## science

ka value for acetic acid,aluminium nitrate,zinc nitrate,ammonium nitrate and sodium dihydrogen phosphate?

21. ## Math

A hemispherical bowl with a 30-cm radius has some water in it. The water is 15 cm deep. Find the volume of water, to the nearest cubic cm.

22. ## Physics

How much energy is need to place four positive charges, each of magnitude +5.0 mC, at the vertices of a square of side 2.5 cm?

23. ## Chemistry

To balance the oxygen and hydrogen for a redox reaction that takes place in acidic solution, it is necessary to use which of the following?A. H2O and H+ B. H2O only C. H2O and OH- D. OH- only

24. ## US History: Ms. Sue

"The Interstate Commerce Act of 1887, establishing the Interstate Commerce Commission (ICC) had been an early effort to regulate the industry; but over the years, the courts had sharply limited its influence." - wiki Would the Interstate Commerce Act be

25. ## English

I need some help with picking out adjectives and adverbs in these movie review examples. 'Toy Story 3': Alternately affecting, hilarious and heartbreaking and the most original prison-escape movie ever made. A worthy finale to a fantastic franchise. It's

26. ## math

how do you find sin7x/4x when lim x goes to 0 the answer is 7/4

27. ## SCIENCE

The earth revolves around the sun, and the moon revolves around the earth. The moon is held in orbit by the earth's_________. a) regression b) revolution c) gravity d) resolution Just need to know if my answer or right or wrong. Thanks! :) C

28. ## math

A leaky faucet fills a 100 millimeter cup in 10 minutes. 1.how much water is wasted in a day?a week?a non leap year? 2.How long does it take to waste a kiloliter of water? (hint:1 kiloliter=1000000 milliliters)

29. ## Physics

A 8.1 kg stone is at rest on a spring. The spring is compressed 12 cm by the stone. The stone is then pushed down an additional 27 cm and released. To what maximum height (in cm) does the stone rise from that position?

30. ## Chemistry

What would happen if you insert an iron nail in the zinc nitrate solution? Explain and write the reactions that take place.

31. ## college

Construct a frequency distribution table for the following scores. Include columns for proportion and percentage in the table. Scores: 5, 7, 8, 4, 7, 9, 6, 6, 5, 3 9, 6, 4, 7, 7, 8, 6, 7, 8, 5

32. ## math

The rent-a-stall horse barn has stalls for 1000 horses. Forty percent of the stalls are for ponies. On Tuesday, there were 200 ponies and a bunch of quarter horses at the horse barn. The horse barn was 75 percent full. hOW MANY QUARTER HORSES WERE IN THE

33. ## Algebra I

Two airplanes start at the same time and fly toward each other from points 1000 km apart at rates of 420 km/h and 330 km/m . After how many hours will they meet?

34. ## math

I have 10 boxes and 44 marbles .Can I put my marbles in the boxes so that each box contains a different number of marbles?

35. ## Physics

How much energy is need to place four positive charges, each of magnitude +5.0 mC, at the vertices of a square of side 2.5 cm?

36. ## Math

(a) A sphere of radius 4 in is inscribed in a cone with radius 6 in. How tall is the cone? (b) A cone with radius 4 in is inscribed in a sphere of radius 6 in. How tall is the cone? Show that there is more than one answer to this question.

37. ## Statistics

Assume the body temperature of healthy adults are normally distributed with a mean of 98.2F and a standard deviation of 0.62F. If you have a body temperature of 99.00F, what is your percentile score? Convert 99.00F to a standard score(or a z-score). Is a

Well,I have a science question it says :If you have 3 liters of air in your lungs and 2/10 of that is oxygen,how many milliliters of oxygen are in your lungs?

39. ## internationa business operations management

As the production manager for an electronic circuit company you have encountered the following situation. Part 1 A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently

40. ## Physics - Projectile Motion

During baseball practice, you go up into the bleachers to retrieve a ball. You throw the ball back into the playing field at an angle of 42deg above the horizontal, giving it an initial velocity of 15m/s. If the ball is 5.3m above the level of the playing

41. ## math

what is the sixth term in this sequence 83,77,71,65

42. ## Psychology

• Find a peer reviewed article which discusses the effects of optimism on physical and psychological health. • Write a 1400 to 1600-word paper summarizing the article and stating your opinion on the validity of the study or studies.

43. ## Chemistry

What would happen if you insert an iron nail in the copper solution? Explain and write the reactions that take place.

44. ## Math

The points (2, 3,6) and (6, 3, !2) both lie on the sphere x 2 + y 2 + z 2 = 49. What is the shortest path between them if travel is restricted to the surface of the sphere?

45. ## science

________ is the study of the earth. Just need to know if my answer or right or wrong. Thanks! :) Geology (Earth Science)

46. ## statistics

using the 68- 95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard diviation of 20. Use the 68-95-99.7 rult to find the following quantities: percentage of scores less than 100 relative frequency of

47. ## Physics

A uniform magnetic field of B = 3x10−4 T points in the positive x direction. A charge of 6 μC is fixed at the origin and a charge of −3μC is fixed at (2,0) on the x axis. A charge of 4 μC travels on the y axis at 5.0 x 106 m/s. Neglecting gravity,

48. ## MATH

An experiment has three possible outcomes: A, B,and C. If P(A)=P(B) and P(C)=2P(A) what is the probability of each event

49. ## science

In 1912, Alfred Wegener discovered and explained the movement of continents, a theory he called"_____." a) plate movement b) continental drift c) moving continents d) shifting plates Just need to know if my answer or right or wrong. Thanks! :) b

50. ## math

Figure is triangle c is biggest side, a and b are same size 19. In figure-4, compute c if a = 3 and b = 2. 20. In figure-4, compute b assuming 27a= and c =2b. ()

51. ## calculus

f(x) = (x+2)/(x+6) What is f^(-1)(-6)? (what is f inverse of -6) I found f' which was [(x+6)-(x+2)]/(x+6)^2 I set the function equal to -6 and found x to be -30/7. Used the formula to find inverse function: 1/f'(f^(-1)(-6)) So I replaced f^(-1)(-6) with

52. ## Chemistry

Under the symbol 2so3 is that the same as 2 molecules of so3?

I can't find an actual summary of the picture bride by yoshiko uchida. All that comes up are sites with little excerpts of summarys and if you want more of it you have to pay. Can someone please help me?

54. ## science

The deepest layers of the earth is called the inner______. Just need to know if my answer or right or wrong. Thanks! :) Inner core.

55. ## math

the speed of a train a is 6 mph slower than the speed of train b. train a travels 220 miles in the same time it takes train b to travel 250 miles. find the speed of each train

56. ## Internet

How did a website like YouTube become so popular? Over a million people use it!

57. ## science

the existence of background radiation is offered as evidence supporting the steady state theory or big bang theory

58. ## science

At the beginning of the____Era, the earth had no crust. Just need to know if my answer or right or wrong. Thanks! :) modern era

59. ## math

how does secx(tanx + tan^2x- sec^2x) simplified to sec x (tanx -1)?

60. ## algebra

Jane is a saleswoman. She is paid a base salary of a month plus a commission on the sales she makes. What was her sales amount last month if she earned a total of ?

61. ## college- strength of material

i have initial and final gauge length and diameter and also have max load. Now i have to draw stress strain diagram. I know how to draw that graph but i a not provided with failure load or yield load so i am not sure how to graph. We had performed

62. ## science

The moon revolves around the____. Just need to know if my answer or right or wrong. Thanks! :) Earth

63. ## childcare

Ms. Sue I observe that you are answering questions at this time. Would you be kind enough to look over my questions posted today. August 19,2010 at 12:07 p.m. Thanks

64. ## English

Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence and identify verb tense used

65. ## cultra

• • Write a 1,400- to 1,750-word autobiographical research paper analyzing the influences of race as it relates to your community. In your paper, write your first-person account of how human interactions in your community have been racialized. For the

66. ## Math

A ball rolls into a corner of a room, where it touches both walls (and, obviously, the floor). A larger ball rolls into the same corner so that it touches both walls and the first, smaller ball. The small ball has a radius 1 inch. What is the radius of the

67. ## Math

the question is "The track at Beck's is rectangualar. The dimensions of the inner playing field are 200 by 80 feet. The track is 13 feet wide on all sides . How many feet will Becky walk if she follows the outside edge of the trck?" How do you work that

68. ## 415

What is a High Performance Team (HPT)? can someone give me a few examples.

69. ## MAT/117- Appendix E

Answer the following questions. Use Equation Editor to write mathematical expressions and equations. First, save this file to your hard drive by selecting Save As from the File menu. Click the white space below each question to maintain proper formatting.

70. ## Geometry

An equation using the numbers 2,4,6 and 8 to get the answer to be nine. You may use multiplication, division, subtraction, addition, and parenthesis. im so stumped.

71. ## government

write several paragraphs stating advantages and disadvantages to the unitary, confederate, and federal systems of government.

72. ## economics

The mortex company assmebles

73. ## English

Colors of Our Friendship Friendhip is full of colors; Red is action; It makes us feel active. Green is freshness; It makes us to live harmoniously with others. Gray is gentleness; It makes us feel generous to others. (Is the poem grammatical?)

74. ## MATH

Find the z-score related to the raw score, mean, and standard deviation as follows. Assume a normal probability distribution.

75. ## college

Y=-1777x+27,153 Y= g\un deaths in United States X-years after 2000 x=0

A leaky faucet fills a 100 millimeter cup in 10 minutes. 1.how much water is wasted in a day?a week?a non leap year? 2.How long does it take to waste a kiloliter of water? (hint:1 kiloliter=1000000 milliliters)

77. ## biology

explain why scientists look at the health and population of organisms to measure to effects of pollution in an ecosystem instead of directly measuring the concentration of chemical in the environment.

78. ## math

Write the statement indicated. Write the negation of the following. A happy face is a smiling face.

79. ## ALGEBRA 1

Consider the equation 4x + 6y = 48. Part 1: On your own paper, graph this equation using the slope-intercept method. In the space provided, explain, in words, each step of the procedure you used. Make sure to use COMPLETE SENTENCES IN PERFECT GRAMMER Part

80. ## math

Write the decimal representing 8/9. Explain your reasoning.

81. ## algebra

convert to decimal notation 8.87*10^7

82. ## MATH

If P(A)=3/5 what are the odds in favor of A occurring?

83. ## math

charlotte has 3 times as many pencils in her schoolbox as rebecca.together they have a total of 24 pencills. how many pencils does rebecca have?

84. ## hrm 240

need help it says to naming one internal and three extrnal ways that i could recruit for the job the job i chose is bank manager and what are the advantages and disadvantages to this is? what i want to know is what is internal and external ways?"

85. ## math absolute values

please solve this: {3z} for z=62

86. ## US History

For the "Square Deal" what were key policies? -Pure Food and Drug Act -Meat Inspection Act -Interstate Commerce Commission ...

87. ## MATHS

5 women complete half a job in 15 days. How long would it take 3 women to do the whole job? Thanks for your help

88. ## science

A falling star is really a ______burning up in the atmosphere of the earth. Just need to know if my answer or right or wrong. Thanks! :) meteor

89. ## biology

Are antibody synthesized by 1. B lymphocytes 2. Phagocytes 3. Helper t-lymphocytes 4. Killer t-lymphocytes Thanks, Cathrine

90. ## English plz help me .

Please help me in english .I have to submit this essay very soon.plz Throughout the history, man has always been obsessed for the immortal life .Gilgamesh was one of them. Who has desire for immortal life. He was a king of urak. He was powerful and full of

91. ## statistics

A normal distribution is any distribution that is not unusual. True or false?

92. ## Math

If ABCD is an arbitrary convex quadrilateral, then the area enclosed by ABCD is described by the formula (1/2) AC*BD*sin(theta) , where ! is one of the angles formed by the intersecting diagonals AC and BD. Prove this formula, and explain why it does not

93. ## math

What is the P (A) if we know that the odds in favor of A occurring are 3 to 4?

94. ## child care

1. A main source of fat and saturated fatty acids in children's diet is A> meat B. candy C. whole milk D. french fries (My answer is D) 2 when a child demonstrates an inability to leap over a barrier, his teacher checks to see if he has mastered the skills

95. ## Algebra

An object weighs 10 lbs and is 200 miles from the center of the earth. Solve for the constant

96. ## Chemistry

Sorry. What I meant was: How do we improve the efficiency of Flash Column Chromatography?

97. ## SCIENCE

The earth is a______.It has four different layers, some thicker than others.? a) spiral b) rotunda c) sphere d) globule Just need to know if my answer or right or wrong. Thanks! :) C

98. ## science

The Paleozoic Era is noted for which two changes? a) rocks were formed b) the earth heated up c) people appeared on earth d) mountains were formed Just need to know if my answer or right or wrong. Thanks! :) d

99. ## MATHS

The sum of three consecutive multiples of 3 is 36. The smallest of the three will be.....? answer is 9

100. ## English

Life is full of colors. Red is love; 1)It comes from our hearts. Blue is sadness; 2) It falls from our eyes. (In the poem, what does each 'it' refer to?)

101. ## science

A total solar eclipse means that no sunlight reaches a certain area on earth. true false Just need to know if my answer or right or wrong. Thanks! :) false

102. ## soc402

Compare and contrast the roles the prison system, the family, and the social stratification system play

103. ## Math

If the graph y = 4sin(bt) repeats itself every 30 degrees (and not more frequently), find the value of b.

104. ## MATH

What percent of heights of adult males in the normally distributed general population have z-scores between -1 and +1?

105. ## MATH

if P(B)=1/3 compute P(not B)

106. ## English help

it is second paragraph. I want to tell you English is my second language.I try my best to do it in right way . After the death of Enkidu .He asks him self does this mean I have to die too? This thinking changes his direction. It is not doubt to say that

107. ## Chemsitry

How do we improve the efficiency of Column Chromatography?

"How do I find out which manufactures in the US sell the most Oxygen Concentrators?"

109. ## science

When any spot on the surface of the earth faces the sun, that spot is dark it is night. true false Just need to know if my answer or right or wrong. Thanks! :) false

12x+3x=15x use the distributive property to show that each statement si true.

111. ## math

3% of \$1,120,000

112. ## Health Care Fnancial Accounting

the local school system asks to submit a proposal to do pre-employment physicalsfor 60 bus drivers. What financial or accounting informaton is needed to submit the proposal? what shall I charge the school system?

113. ## college

Describe in Hamlet, Prince of Denmark the representative of the literature in the culture from which it comes.

114. ## science

Very hot, liquid iron and sulfur are found 1,800 miles deep in the earth in the _____.? a) inner core b) mantle c) outer core d) crust Just need to know if my answer or right or wrong. Thanks! :) c

115. ## math

make A 14 dot array that has exactly 2 rows

Is this a sentence? The fox sits.

117. ## math

Name the property of addition that has been applied. (8+2)+ 2 = 8 + (2 + 2)

118. ## elec

Can f(t) = u(t)5cos(2pi t) be represented directly as a fourier series?

119. ## math

The lottery payoff in a letter game at a church social is determined by the single letter the winner holds. There are four letters, A, B, C, and D. The probabilities that each will be drawn are 1/2, 2/10, 4/10 and 3/10 respectively. The payoffs are \$2 for

120. ## US History

1.Square Deal Would the Square Deal be considered a motto?

121. ## Fundamentals of Cost Analysis (Economic Analysis)

What would be the present value of an item that has a salvage value of \$25,000 at the end of five years? Assume a discount rate of 3.8% for an end-of-year factor. Carry calculations to four decimal places.

122. ## political science

How do local governments get their revenue in U.S.? and what are the sources?

123. ## preschool

what is an integer? a postitive one? a negative one? can you add them?

124. ## geometry

I am having a hard time determining what formula I need to solve the following: On a hexagonal window the height is 1.3m. Find the width.Do I use the pythagreom theorem (but I have only one known number) or do I use the formula 6(1/2as)? I'm confused. The

125. ## math

find a 9 digit # that fits. the first3 #'s equal 1/3 of the last 3. The middle 3 #'s are the result of subtracting the first 3 from the last 3. All the digits from 1-9 are used only once. What is the number

126. ## science

Vertebrates" is the name used to describe mountain-building processes. a) true b) false Just need to know if my answer or right or wrong. Thanks! :) false

127. ## science

ka value for acetic acid?

128. ## math

Find the GCF of the numbers using an appropriate method.Explain your reasoning. 240; 10,000 and 4500

129. ## math

Perform the calculation mentally, show your work. 3 + 57 + 44 + 36

130. ## Math

The points (2, 3,6) and (6, 3, !2) both lie on the sphere x 2 + y 2 + z 2 = 49. What is the shortest path between them if travel is restricted to the surface of the sphere?

131. ## geometry

a.40 a.2(3(5+2)- b.6-2(4+5)+6 b.-6 c.3.8/4+1 d.5-2.3+6(6+1) c.7 d.59

132. ## Algebra 2

I need help finding the vertex of the parabola y=x^2-3x-21

133. ## glendale

How do ourfood choices affect our own consumption of the nonrenewable energy available to sustain life?

134. ## ALL OF JISHKA STAFF

Hello I had a couple of questions and was woundering if you have staff members that are teaching or have taught AP BIOLOGY AP PHYSICS B AP CALCULUS AB AP CHEMISTRY I was told that the AP BIOLOGY teacher had gotten extremly ill =(, has he come back? Also

135. ## child care

two children using finger paints agree to share them. They're engaged in play. A. associative group B. cooperative C. parallel D. groupthink (My sanswer is A) Do you think this correct? Need your feedback.

136. ## science

ka value for acetic acid?

137. ## Germen

I have to explain why certain verbs use sein instead of haben for the formation of the Perfekt? and name some verbs that use sein instead of haben for the formation of the Perfekt!

138. ## algebra

find -x when x=-21

139. ## math

how do you find the derivative of square root of x