Questions Asked onJanuary 30, 2009

1. Physics

1. A flowerpot falls from a windowsill 25.0 m above the sidewalk. a. how fast is the flowerpot moving when it strikes the ground? dont i need to know the time it takes, what formula am i supposed to use for this? would 25 m be the displacement? b. how much

2. chemistry

Hello! my question is. Cumulene has chemical formula C4H4 with 7sigma and 3pie bonds. the 2 outer C atoms have a hybridization of "sp2", the H atoms have a hybridization of "s", and the 2 C atoms in between have "sp" hybridization. As I figured out, there

3. physics

a person pushes a box across a horizontal surface at a constant speed of .5 meter per second. the box has a mass of 40 kg and the coefficient of sliding friction is .25. The power supplied to the boxx by the person is... please Explain!!

4. math

Three students from grades 10,11 and 12 were elected to the student council. Grade 10: Tom(T), Sally(s) and Bill(B) Grade 11: Jerry(J),Anne(A)and Connie(C) Grade 12: Dan(D), Martha(M) and Gwen(G) A three member committee is to be formed with one person

5. biology

A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50–L container of cold water, what would be the approximate increase in the temperature of the water?

6. economics

A perfectly competitive painted necktie industry has a large number of potential entrants. Each firm has an identical cost structure such that long-run average cost is minimized at an output of 20 units. The minimum average cost is \$10 per unit. Total

7. Physics

please show me how to solve these: 1. Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straight highway? answer=3.00 h 2. How much time would Simpson save by increasing his average

8. Physics

a car is accelerating at a uniform rate of 0.85 m/s^2. what is the magnitude of the car's displacement as it accelerates uniformly from a speed of 83 km/h to one of 94 km/h? i tried a formula that solves for displacement and uses initial and final velocity

9. Math

how do you find the constant of variation k for the direct variation? for example, 4x + -6y. how do you find k?

10. statistics

The mean GPA (grade point averagE. of all male students at a college is 2.77 and the mean GPA of all female students at the same college is 2.89. Suppose we take one sample of 40 male students and another sample of 50 female students from this college.

11. Physics

please show me how to solve this 1. A bus travels 280 km south along a straight path with an average velocity of 88 km/h to the south. the bus stops for 24 min. then, it travels 210 km south with an average velocity of 75 km/h to the south a. how long does

12. Algebra

Carmella has \$1200 invested in two stocks. One returns 8% per year and the other returns 12% per year. The income from the 8% stock is \$3 more than the income from the %12 stock. How much did carmello invest in each stock? B) wrtie an equation about the

13. Chemistry

I have 3 Questions: We actually did the lab experiment for this, but I have no idea whether my reasons are correct. 1) For the equilibrium system Fe+3 + SCN- FeSCN+2, what would happen if you add 2 drops of Fe No3?. Which way will the equilibrium shift

asked by nate Leung
14. Geography

i need to label a diagram of the drainage basin of the River Tees. the words i have got to use are:- Tributary Mouth Confluence Source Reservoir Also i need to colour the diagram to show the relief of the drainage basin. A)Shade the river and its

15. chem

write a mechanism for the reaction of sodium chloroacetate with 4-chlorophenolate. - i know its a sn2 mechanism, but I don't know who to go about from here

16. math

Four large oranges are squeezed to make six glasses of juice. How much juice can be made from six oranges.

17. Chemistry

Assume that the element 107Uns is synthesized and that the sample contains 39.8% 270Uns (269.4 amu), 35.2% 271Uns (270.3 amu) and 25.0% 272Uns (271.2 amu). What is the value of the atomic weight? A. 270. B. 269.3 C. 270.4 D. 271

18. math

A rectangular field is four times as long as it is wide. If the perimeter of the field is 750 feet, what are the dimensions of the field?

19. Psych

CAN SOMEONE REVIEW MY ANSWERS AND TELL ME IF THIS IS CORRECT? Why is it flawed to ask how much of a particular behavior is due to genetics and how much is due to experience? It is inconsistent to think that behaviors are solely due to our genetic make-up.

20. Trig

Rules of Logarithms: Can someone explain how to do: 1) e^(2(ln)(x)) 2) e^(-lnx) I know the rules I just don't understand how they apply.. thanks!

21. english

what are 2 figurative devices from obama's inaugural speech?

22. music

I need to find the definition of harpsichord and also 4 examples of harpsichord. thanks

23. Physics

Please check these answers[my letter choice is in CAPS]: 1. In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses? A. interpreting results b. stating conclusions c. conducting experiments d.

24. Math

Help with these problems would be greatly appreciated: 1.Find the definite integral of dx/(x(1+ln(x))from e^6 to 1. 2. Solve for x in terms of k for log[2,x^6)+log[2,x^10=k. (its log base 2) 3.Solve log base 3(log base 3, x)=-2

25. Physics

The professor gave us no background material or explanations for any of these questions. 1. Imagine that molecules of H20 are stacked up in a cubic array, like a large number of cubical boxes. Each water molecule is taken to be at the center of each cube

26. Statistics

Construct the appropriate control chart for the observations listed below, using 3 sigma limits. Product Number - Number of defects 1 - 3 2 - 3 3 - 6 4 - 5 5 - 3 6 - 5 7 - 2 8 - 2 9 - 3 10 - 4 11 - 6 a. Determine the upper and lower control limits. b.

27. IT 205

Highlight the most important differences between object-oriented programming languages and generations 1-4 of (often called top down or structured) programming languages. How are they similar?

28. World Geography

I need an acronym to remember the Canadian provinces. Any help?

29. statistics2

A textbook publisher wants to determine process control charts for the textbook height. The following table shows the first 20 samples of n=4 sample size of the production of the text. Sample - X Bar - Range 1 - 10.01 - .01 2 - 9.97 - .04 3 - 9.98 - .03 4

30. Chemistry

If a catalyst is introcuced to ecxellaerate decomposition of Hydrogen Peroxide with the the aid of a condenser and another bottle theat is connectect to the first. This second bottle contains displaced water(bottle of water inverted to leaving an air

31. Physics

The professor gave us no background material or explanations for any of these questions. 1. A contemporary computer chip dissipates 54 watts of power on a area of 1 square cm. due to the transistors inside this area. Assuming that transistors in succeding

32. PreCalculus

I am having a lot of problems with this linear programming problem. CAn someone help? A farmer buys two varieties of animal feed. Type A contains 9 oz. of oats and 2 oz. of corn per pound. Type B contains 5 oz of oats and 10 oz of corn per pound. The

33. English

Two main positive values are expressed by the writers in Fire on the Water: to have the determination to do what’s right, despite other people’s views and beliefs, and to respect and embrace one’s heritage and native roots. These values can be

34. Physics

i have a graph that shows the motion of a cyclist. as the velocity(m/s) goes up:1, 2, 3... the elapsed time(s) also increases, 2, 4, 6... when the velocity is on 2 the time is on 2, when the velocity is on 3 the time is on 4... the line that is drawn

35. history

I need help with unscrambling these letters into 2 words ecnoevprmisrirtam.only hint it has to do with canada.

36. calculus

Consider the solid obtained by rotating the region bounded by the given curves about the x-axis. y = 6 x^6 , y = 6 x , x >= 0 Find the volume V of this solid.

37. english

i need figuartive devices from obama's speech - can sue explain her example

38. spanish sra jmcguin

this is the assignment I'm supposed to do a draft essay on helping a high school senior with improving his grades. 3 recommendation as his friend and there explanations, along with introduction and conclusion sentences. Only one paragraph the next posting

39. Math - check my answers :)

1. Find the amplitude, if it exists, and the period of y=tan 1/4È Answer: No limits in amplitude, y=tanÈ/4 period is 4pi 2.Solve x = Arctan(-sqrt3) Work: Pythagorean theorem: sqrt(1^2+3)= sqrt4=2 in length. Triangle is 1, sqrt 3,2 Answer: -60° 3. In

40. Humanities

The style that fills the picture space with figures and uses bright colors and lots of gold is called? a. Romanesque b. Renaissance c. three-dimensional d. gothic e. none of the above

41. biology

Can someone explain to me how 2,3 BPG works for hemoglobin? BPG affects oxygen binding affinity by binding in a small cavity at the center axis of deoxygenated hemoglobin. In oxygenated hemoglobin, this cavity is too small to effectively accommodate

42. Math

I need help on this problem: 8+9-10 I just don't understand if you do that 8+9 part first or the 9-10 part first Can you just tell me the steps to it? Thanks! -MC

43. Introduction to Psychology

Okay I have to do short paper on my results for a survey that I did to determine which branch of psychology I would be best suited for. My results were Behavioral: 20, Humanistic: 20, and Psychoanalytical: 17. I think my main problem is getting all of the

44. English

put forward an argument for macbeth to be the next king i don't know how to do this i don't have any info please help me

45. Physics

Why does a pencil look broken if you hold it at an angle in a beaker of water?

46. physics

A moto of a crane is lifting a 100 kg load 20m high using 25 kj of electrical energy. calculate the efficiency

47. Physics

for this question the answer is 680..the answer i get is 684 please help 1. it takes you 9.5 mins to walk with an average velocity of 1.2 meters per second to the north from the bus stop to the museum entrance. what is your displacement? i did: 9.5 *

48. chemistry

ii) What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm

49. Physics

sorry for reposting this but im really stuck Simpson drives his car with an Vavg of 48.0 km/h to the east. how long will it take him to drive 144 km on a straight highway? i got the answer to that as 3 hours but i cant do this: how much time would he save

50. Chemistry

Is there a correlation between temperature change with the changes on the molecular level? And what is it? (talking about changes in phases with melting and heating. and the temp corresponds to the time it takes for each phase to melt, vaporize, etc.) (on

51. trigonometry

show that 1-cos^2t divided by sin^2t =TANt

52. Chemistry

If a catalyst is introduced to ecxellaerate decomposition of Hydrogen Peroxide with the the aid of a condenser and another bottle theat is connectect to the first. This second bottle contains displaced water(bottle of water inverted to leaving an air

53. Physics

please check if these are right 1. Which of the following is the equation for average velocity? a. Vavg=delta x/delta t b. Vavg=delta t/delta x c. Vavg=delta x *delta t d. Vavg=V1-Vf/2 i picked A 2. Suppose you are given a position versus time graph. the

54. Cultural Diversity

Post a 200- to 300-word summary of a current issue between Native Americans and the federal government. Identify the legislation that you think is linked to the issue, and explain why you think there is a connection. Consult the National Congress of

55. math

can someone give me proof that a negative number times a negative number is a positive number I've always been told this in like seventh grade that it is but havne't been given any proof

56. Science

how do you read graphs showing direct variation and inverse variation??

57. spanish sra jmguin

Santiago, estás sacando notas malas. Primero, insisto en que tú limites tiempo con tu novia o que estudies con ella. Tu novia te puede ayudar en tus estudios. Segundo, te recomiendo que tú decidas entre tocar la guitarra o jugar para el equipo de

58. English

I am trying to find out who (or which companies) own Australian channels 7,9 and 10 and also SBS. I have looked on various websites all with different anwsers. Can someone please help me find the correct answer. Thanks.

59. science

give a details history about the evolution of man from stone age till modern age, with pictures

asked by Tosin osemeobo
60. calculus

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area S of the region. y=sqrt(x) , y=1/2 x , x=25

61. Algebra

I am doing the amount of permutations in the word trigonometry. For the expression, I wrote 12!/2!2!2!. I got 968003200. Is this correct? If not, should I use parenthesese? Thanks

62. Ladybug -- Appendix C

I've removed your post because Jiskha volunteer teachers do not have access to Axia materials -- such as Appendix C. I suggest you consult your instructor or other students if you want help on this assignment.

asked by Ms. Sue
63. French

How would you say 'hidden talents' in French? Would it be something like "Est-ce que tu as des talents caches?" (With the accent, I'm on a laptop and it won't let me type it"

64. math 012

Hi, I am trying to do homework for my math 012 class- solving linear equations- and I need help with 9 of the problems. I would really appreciate any help with this. I can do the problems and send them to you, or however you prefer. Thanks!

65. Anatomy

What lipoprotein is associated with cholesterol and the production changes in blood vessles?

66. science

freshwater resource challenge

67. Com220

When might bias not interfere with credibility?

68. Macroeconomics

Would Interest on both government and corporate bonds would be included as part of interest income in determining the GNP by the income approach

69. Social Studies

Hi, Can you please tell me a good definition for Cultural Diffusion? I think it is the spread of culture and ideas. Is that correct, or do I need to add something. Thank You....

asked by Happy Face
70. theology

what do they mean when they tell you to comment about someone's religous imagination?

71. math

sketch the graph of y^2=(1/4)x

72. Math

how do you solve this: 2^3(5^0-6m^2)

73. Algebra

Why is the line x=4 a vertical line

74. math

The region under the following curve is rotated about the x-axis. Find the volume of the resulting solid. y=13tan(x)^2, 0

75. question

Are relationships better explained through staged theories or through dialectives?

76. science245

how do fossils help in determining the relative age of strata?

what is prime and composite 13,37,25,117208,67

78. Macroeconomics

How do I find depreciation does anyone know the formula thanks