1. Physics

A 50.0-kg student climbs a 5.00-m-long rope and stops at the top. (a) What must her average speed be in order to match the power output of a 200 W light bulb? (b) How much work does she do?

2. ...Physics...

A jet moving at 500 km/h due east moves into a region where the wind is blowing at 120 km/h in a direction 30 degrees north of eat. What is the new velocity and the direction of the aircraft relative to the ground? I am completely lost on this question...

3. Algebra II

Bolivian coffee sells for \$4.59 per pound, and Columbian coffee sells for \$5.95 per pound. How many pounds of each coffee should be mixed to produce 4000 pounds of a mixture that will be sold for \$5.10 per pound? I think this is a system of equations but

4. math

A study to determine whether or not a football filled with helium traveled farther when kicked than one filled with air found that while the football filled with helium went, on average, farther than the one filled with air, the difference was not

5. Physics

A skier of mass 70 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 60m up a 30 degree slope (assumed frictionless) at a constant speed of 2.0 m/s? (b) What power must a motor have to perform this task?

6. Physics

A track star in the long jump goes into the jump at 12 m/s and launches herself at 20 degrees above the horizontal. How long is she in the air before returning to Earth? (g= 9.81 m/s squared) I tried using some formulas but I'm using all of the wrong

7. 14 line 10 syllable poem

how to do it...what do they mean?

8. math

A farmer bought a horse for \$50.00 Then he sold it for \$60.00 He had second thoughts about the horse, and he bought back the horse for \$70.00 And then he sold it again for \$80.00 What is the financial outcome of these transactions

9. AP Biology

After an enzyme is mixed with its substrate, the amount of product formed is determined at 10-sec intervals for 1 min. Data: 0 secs. = 0.0 product formed (mg) 10 secs = .25 product formed (mg) 20 secs = .50 product formed (mg) 30 secs = .70 product formed

10. Physics

1.A race car has a mass of 707 kg. It starts from rest and travels 42.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?

11. AP Statistics

A researcher wishes to compare the effects of 2 fertilizers on the yield of a soybean crop. She has 20 plots of land available and she decides to use a paired experiment — using 10 pairs of plots. Thus, she will: a. Use a table of random numbers to

I need to find 3 business in my comunity: one that is formed as a sole proprietory, one that is formed as a general partnership, and one that is formed as a corportion. Identify the business and explain what characteristic of the business form led the

13. Physics

A stone has a mass of 3.0 10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.86. When the tire surface is rotating at 10 m/s, the

14. physics

A volleyball player spikes the ball. The ball hits the floor with a velocity of 21.2 m/s at 30 degrees above the horizontal floor, 4.66 m away from where she spiked it. What was the ball's initial velocity (immediately after the player hits the ball)? Give

15. Social Studies: The Revolutionary War

How did the fighting at Lexington and Concord affect the relationship between the colonies and the Great Britain?

16. science

when you ride a bicycle at full speed and the bike stops suddenly, why do you have to push hard on the handle bars to keep from flying forward?

17. chemistry

can someone explain to me how to answer this: Polycarbonate plastic has a density of 1.2 g/c3. A photo frame is constructed from two 3.0 mm sheets of polycarbonate. Each sheet measures 28 cm by 22cm.What is the mass of the photo frame?

18. AP Calculus

I need to find the integral: int:(x^2+2x+3)/(x^3+3x+9) dx I think I am supposed to use the rule: int:1/u du=ln|u|+C But I don't know what to do first. Thanks for your help! :-) Oh- and the answer the back of my book gives is (1/3)ln|x^3+3x^2+9x|+C

19. physics

The cavle on an elevator is what pulls the elevator up, and allows it to come down safely. The mass of the elevator is 1400 kg. If the elevator starts from rest and is pulled upwards with a constant tension of 18 kN, what will its speed be after moving 6m?

Let's say that you and two partners want to start a company that specializes in special occasion gift baskets for individuals and corporate clients. You want to have a storefront in the local shopping mall or shopping area, as well as a vertual starfont on

21. Physics

A 74 kg skier is pulled 50 meters up a 30 degree incline. How much work is required to pull the skier up?

22. S.S.

Why didn't Native Americans like signing papers. HA HA sorry I asked earlier. But my partner just called me and said she didn't find her answer. =P

23. chemistry

what is the importance of obtaining the percent yield of a product. for instance i had to do steam distillation to obtain eugenol benzoate. once i calculate the % yield what could be the importance apart from that's the amount of product obtained

24. ICT - Storage devices

Hi I would like to ask a question Does Cache memory have to be in every computer , and can you explain me breifly this complicated process ?

25. Geometry

1) Draw a valid conclusion if possible: Parallel lines do not intersect If lines do not intersect, then they have no points in common. **can this logical argument be identified by name? If yes, name it. 2)Draw a conclusion given AB bisects segment XT at

26. Editing

I made some more changes. Could someone please edit it again? In 1915, the 1st Canadian Division was recognized as a fighting force, for holding their ground against a new type of warfare: chlorine gas. It was at the Battle of Ypres where the Germans

27. geometry

all students like vacations change to if then form

28. science

list as many ways as u can how are crystalline solids connected to science? how are crystalline solids connected to math? how are crystalline solids connected to the world? how are crystalline solids connected to you? why is it important?

29. Algebra

I am not sure what this question is asking. Please help. Find two consective postitve intergers such that the sum of their squares is 85.

30. Editing

I forgot to post my whole essay on my last question so if someone could edit the next part. It might be confusing as to where I picked up. My last post has the beginning. There had been two attempts to kill the Archduke. One was on Appel Quay where one of

31. chemistry

Heat of aluminum is 0.897 J/(g.degrees C) Iron is 0.449 J/(g.degrees C) Which chunk of metal is hotter on a sunny day. (Both painted the same color.)

32. CHEMISTRY- urgent

Using the tables of enthalpies of formation and entropies of formation, estimate the boiling point for the following liquid: methanol (CH3OH), ethanol (C2H5OH) and acetic acid (CH3COOH). compare to their tabled boiling points. how would i go about working

33. Physics

A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 12.6 m higher than A, with speed v/2. Calculate the maximum height reached by the stone above point B. I was told the equation to this was "h=1/2(v2)^2/g."

34. english

can you give me a list of topics I can write a speech on? For example: If I wanted to write to the MTA about getting the trains to be on time or more available trains to come more often. I need to persuade an audience to better something.

35. English

i need a sample lesson plan for what makes us grow with 15 childrens objectives, material,learning activites

36. math

how would you write 20,500 in exponential notation form .

37. Bio 2

What shape and leaf margin and vein pattern do pine trees have?

38. physics

From inside your apartment, you watch rain fall straight down at a constant speed of 9 m/s. Your friend L calls you as she is driving toawards the west at a constant of 90 km/hr. What with what velocity does L see the rain fall as she looks out her

39. Physics/Nautical Mile

Still studying! I have The Macmillan & Silk Cut Nautical Almanac from 1981 which pre-dates WGS84 and they make reference to the NM being 6046 feet at the equator and 6108 feet at the poles. Conversions to metres = 1842.82m and 1861.71m. Remarkably similar

40. Math

George can spend \$34.80 for his dinner. He wants to tip the waiter 20% of the cost of his meal. How much money does he spend on the tip? Translate the question into an equation. Do not solve.

41. English- Canterbury Tales

I need help comparing and contrasting The Wife of Bath abd The Clerk from Canterbury Tales.

42. math

y=7x-6 When y=0 x=?

43. english

Hello. I am writing an essay about ancient religions in the Middle East, Sumerian and Hebrew. I am wondering whether I should write in the past or present tense because Hebrew is still around today (referred to as Jewish) and there is probably some

44. Physics

2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?

45. Physics

2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?

46. algebra

I need help on the following Problem: 3x-5(3x-7)=2(x+9)+45

47. algebra

I need help with a couple of math problems. subtract 5m^2+2m+9 from 7m^2-5m-8 simplify (m^4)^3(m^2)^9/(m^3)^2

48. Chemistry

Under appropriate conditions, molybdenum emits X rays that have a characteristis wavelength of 0.711 Angstrom. These X rays are used in diffraction experiments to dtermine the structures of molecules. How fast would an electron have to be moving in order

49. AP CHEMISTRY

Could you please look over my work and see if I did this correctly? Thanks When 3.200 g of liquid ethyl alcohol (C2H5OH) is burned in a bomb calorimeter containing 3.500 kg of water, the temp rises from 22.84 degrees C to 28.36 degrees C. The calorimeter

50. Biology

Why do males have the ability to produce 4 viable sperms while females can only produce one egg in the process of meiosis?

51. Chemistry- To Bob Pursleyy

I am having a hard time on how to get V in wavelength= h/mv If I multiply by mv then I get W(mv)=h Then I get Wmv=h I divide by Wm and get V=h/Wm ...but that doesn't seem to work. My other question is if I am using the correct values. W (wavelength or

52. Editing

Could someone edit this for me... In 1915, the 1st Canadian Division was recognized as a fighting force, for holding their ground against a new type of warfare; chlorine gas. It was at the Battle of Ypres where the Germans released 160 tons of poisonous

53. Physics

1. The problem statement, all variables and given/known data A student pulls on a box up an incline of 10 degrees. The student pulls with a force of 180 N directed at 30 degrees above the line of the incline. The box has a mass of 28 kg, and the

54. physics

A skier of mass m kis down a 30 degree slope. By measuring her acceleration a, the coefficient of kinetic friction mk between the skis and the snow can be calculated. Show that mk=(g sin 30-a)/(g cos 30) SO I know that sin 30 = opp/hyp and cos 30 =

55. Science

If the mass is 5 kg, what is the weight???

56. Science (biology 2)

I need help with leaf shape of tree leaves (Honeyloust)

57. Calculus Help!!!

Find the derivative if y=e^(2x)-lnx^(2) Im stuck, all i have is 2e^(2x)-2/x

58. Calculus Verification

I just want to make sure im right. Find the derivative if y= arcsec(x+3). I got 1 ======================= |x+3|sqrt(x+3)^(2)-1 Is this the final answer or do you need to solve (x+3)^2 and get (x^(2) + 9x + 9)

59. math

Which label describes the following? 3x +6 =10

60. Physics- for Quidditch

I posted the question about the rain before and I understnad how to find componnets...but how would I do that without a given angle?

61. math

Which label describes the following? 3x +6 =10 A). Expression B). Linear equation C). Equation which is not linear

62. Chemistry

How many grams are there in 2.3 x 10^24 atoms of silver? I need to use dimensional analysis, and I'm not sure of the conversions I'd need to solve this problem. Thank you!

63. biology

how does the extinction of dolphins affect the sustainability of the Earth?

64. chemistry

give the name of a solvent other than water for dissolving sugar?

65. Maths

calculate the upper and lower bounds of the following calculations given that each number is written to the nearest whole number 40o divided by 60 10 times 9 multipiled by 1

66. Strategic Management

Explain the essential compponents of the strategic management process?

67. science

how many different types of walnut trees are there and what do they look like?

68. Math

How can I solve this equation? 5 2/15+ 7 1/15?

69. math

I cannot find the pattern to these two problems. Can you help? 17,_,_,62,_ and the next problem 57,_,_,33,_ Thank you, Mindy

70. AP CHEMISTRY

Using the tables of enthalpies of formation and entropies of formation, estimate the boiling point for the following liquid: methanol (CH3OH), ethanol (C2H5OH) and acetic acid (CH3COOH). compare to their tabled boiling points. how would i go about working

71. CHEM

Could you please look over my work and see if I did this correctly? Thanks When 3.200 g of liquid ethyl alcohol (C2H5OH) is burned in a bomb calorimeter containing 3.500 kg of water, the temp rises from 22.84 degrees C to 28.36 degrees C. The calorimeter

72. Biology

How do u figure out the initial rate of an enzymatic reaction when they only give the time in seconds and the product formed?

73. Calculus TEST!!!!

Find an equation for the tangent and normal to the curve x^2+y^2=9 at x=1

74. Physics

A satellite has a mass of 5750 kg and is in a circular orbit 3.6 * 10^5 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.20 * 10^6 m. What is the true weight of the satellite when it is at rest on the

75. history/english

Explain how the European desire for profit affected the people of the Congo. i cant figure this out! please please help me its for english but its more of a hostory question

76. Ques. For Writeacher

What do you mean by (add) in attacking France, id=1191771020

77. algebra 3

using the equation h(r)=5r whats the range if the domain is (-1,0,1,2)?

you have a offer for a house, what is the best way to responed to the offer and request for a competitive price?

79. Social Studies

Hmmm so my teacher wants us to go online and do some research on why Indians/Native Americans didn't like to sign papers.

80. Biology 2

How do I identify leaves, there are so many of them. I need a website that has leaves and trees of Mississippi.

81. Biology 2

My computer wants me to install something called Shockwave player 10.2 to use to website... are there any others that can help me identify the leaves

82. General/( Bio 2)

What is ActiceX that keeps showing up on my computer?

83. math

how would i find the derivative of this problem: t-.3t^2+cos 4t? I don't know how to find the derivative of cos 4t

84. science

during prophase one of meiosis, are there 46 homologus pairs per cell or 23?

85. probability

a box contains 25 computer diskettes, 5 of which are double density and the remiander are high density. A second box contains 15 diskettes, 10 double density and 5 high density. A box is selected at random and then two diskettes are chosen randomly from

86. spanish

what are the main types of dances in Chile?

87. Science

What is alteration of generation for plants?

88. Social Studies: The Revolutionary War

What did the First Continental Congress achieve?

89. science(chem)

How many mg of fluorenone can 0.53mol of sodium borohyride(NaBH4) reduce? ~I don't know how to get this..wouldn't I have to have a reaction equation given to me?? Well I didn't have one for the question given to me so I don't know what to do. I tried

90. Calculus Help!!!!

Fnd the derivative if y=x^(1+sqrt2) Is this right (1+sqrt2)/(x) x^(sqrt2)

91. Calculus Help!!!

Find an equation for the tangent and normal to the curve x^2+y^2=9 at x=1 Do you have to simplify the problem to get y on one side. or is your u=x^2 v=y^2 du=2x dv=2y if so then what next?

92. physics

The leader in a bicycle race passes your viewing position at t=0 with a speed of 30 mph. Ten seconds later, the next racer goes by at 40 mph. Assuming their speeds are constant, where will the second cyclist catch up to the first? (Give this as a distance

93. geometry

-8(4+9x)=7(-2-11x)