1. CHEM

Help on part "c": The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O. a)What is the molarity of the stock solution of luminol? anwer I got: molarity of luminol

2. Chemistry

"Would you expect each of the following atoms to gain or lose electrons when forming ions? What ion [cation/anion] is most likely in each case?" Followed by a short list of elements such as Na and Sr. What I'm wondering is how I'm to know? I can't find

3. COLLEGE PHYSICS

a 58kg skier is coasting down a 25degree slope with a kinetic friction force of 70N. initial speed is 3.6 m/s and distance traveled is 57m. find final velocity? i need some help on this i don't know where to start. i know W=F x cos theta x distance is the

4. Physics

A candle is placed 17.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 6.0 cm farther away from the mirror. Find the focal length of the convex mirror. _______cm

5. CHEM

Help on part "c": The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O. a)What is the molarity of the stock solution of luminol? answer I got: molarity of

6. COLLEGE PHYSICS

A 1100kg car starts from rest, accelerates for 5 seconds. The magnitude of acceleration is (a)= 4.6m/s2. find the average power generated by the net force that accelerates the vehicle? what do i do here i know that F=ma= 1100x4.6=5060=F and Wnet =

7. Physics

Someone please help me, I am having the worst time understanding this problem. Where do I begin? Atomic physicists ignore the effect of gravity within an atom. To see why, calculate and compare the gravitational and electrical forces between an electron

8. calculus

The diagonal of a square is increasing at a rate of 3 inches per minute. When the area of the square is 18 square inches, how fast(in inches per minute) is the perimeter increasing?

9. Physics

Could someone help me on how to put this all together. Atomic physicists ignore the effect of gravity within an atom. To see why, calculate and compare the gravitational and electrical forces between an electron and a proton separated by 10-10m. Im

the paper delivery boy tires to throw the paper ubti your narrow driveway without slowing down. his pickup truck travels at 10 mph and he throws the paper at 20 mph just as the truck passes the drive way. a) in what direction should he throw the paper in

11. Economics

An Arizona student claims to have spotted a UFO over the desert outside of Tucson. How will his claim affect the supply (not the quantity supplied) of binoculars in Tucson stores?

12. science

one pound is the same as 4.45newtons what is the weight in pounds of 1 newton

13. calculus

a spherical snowball with diameter 4 inches is removed from the freezer in June and begins melthing uniformly such that it is shrinking 2 cubic inches per minute. How fast ( in square inches per minute) is the surface area decreasing when the radius is 1

14. Earth Science

1.A trench is associated with which plate boundaries. Oceanic-oceanic convergence, hot spot, divergent boundary, oceanic-continental convergence, continental-continental convergence. My answer is divergent boundary. Is this correct? 2. A rift valley

15. physics

a high speed sander has a disk of 2.74 cm in radius that rotates its disks about the axis at a constant rate of 503 rev/min. determine the linear speed of a point 2.33 cm from the disk's center. answer in units of m/s

16. Finance

An AT&T bond has 10 years until maturity, a coupon rate of 8 percent, and sells for \$1,100. a. What is the current yield on the bond? b. What is the yield to maturity?

17. physics

A satellite has a mass of 5850 kg and is in a circular orbit 3.8 105 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.15 106 m. What is the true weight of the satellite when it is at rest on the planet's

18. Economics

How will a new law mandating an increase in required levels of automobile insurance affect the equilibrium price and quantity in the market for new automobiles?

19. Physics

The image produced by a concave mirror is located 28 cm in front of the mirror. The focal length of the mirror is 14 cm. How far in front of the mirror is the object located? _________cm

20. microeconomics

Suppose a firm produces output using the technology Q=K1/3 L2/3 Find a. The long run cost function b. The short run cost function if capital is stuck at 10 units. c. The profit maximizing level of output as a function of the price of the good, wages,

21. Physics

Four penguins are being pulled along very slippery (frictionless) ice by a curator. The masses of the three penguins are given below and so are two of the tensions. Find the penguin mass that is not given. 12kg---Unknown--111N--15kg---20kg--222N After

22. Physics

A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2 seconds later. If the speed of sound is 340 meters per second, how high is the cliff?

23. Geography

What was the importance of Marco Polo's travels to the whole of the age of Exploration? Would like to know different levels of things he did

24. psychology-Libet Study

In the Libet et al. study (1983) that asked participants to flex their wrist and record when they decided to flex it, a. people were not very accurate in determining when they actually moved their wrist b. the results suggested that the brain started to

25. Chemistry

a) Explain why a bottle of pop goes "flat" if left open to the air. b) Would keeping the bottle warm help the soda to stay fizzier longer? Explain.

26. Science

How do you balance this equation? C+S8=>CS2

I need help with the follwoing persuasive business letter. Pretend that you are the newly hired business manager for the San Diego Zoo, in charge of securing group tours. You will have to plan two business messages. The first is to convince the

28. International Finance

what is the general formula for figuring out this question? If the dinar devalues against the US dollar by 45%, the US dollar will appreciate against the dinar by...? I'm not getting this at all, and the book is not helping!!

29. Physics

At the entrance channel of a harbor, the tidal current has a velocity of 4.94 km/hr in a direction 23.2° south of east. Suppose a ship caught in this current has a speed of 15.6 km/hr relative to the water. If the helmsman keeps the bow of the ship aimed

30. math

the absolute value of a certain integer is greater than 3 and less than 6. which of the following could not be 2 less than the integer? A)-7 B)-6 C) 2 D) 3 E) 4

31. science

how is the periodic table connected to science? how is the periodic table connected to math? how is the periodic table connected to the world? how is the periodic table connected to you? why is the periodic table important?

32. Economics

Use supply and demand analysis to explain why hotel room rental rates near your campus during parents’ weekend and graduation weekend might differ from the rates charged during the rest of the year.

33. math

A 30-second advertisement on a local television station during prime time costs the advertiser \$1,280. To the nearest cent, how much does the ad cost per second? will you help me with step by step instructions

34. science-physics

You walk 15 m south and 35 m east. Find the magnitude and direction of the resultant displacement both graphically and algebraically. What's the ° (counterclockwise from east)?? Well I tried using tan=15/35 the degrees ended up being 23 degrees which was

Is lady or lunch lady a proper noun in the following sentence? The lunch lady told me that I had to pay three dollars.

36. math ( average)

a student wants to get an average of 80 on the 5 tests to earn an A grade.on the 4 test he gets 79, 88,64,78. how much should he score on the 5th test so that he gets this average of 80?

37. math

A bag contains 2 white marbles, 4 blue marbles, and 5 red marbles. Three marbles are drawn from the bag. What is the probability that not all of them are red?

38. economics

Suppose the price of apples rises from \$3.50 a pound to \$4.00 and your consumption of apples drops from 30 pounds of apples a month to 20 pounds of apples. Calculate your price elasticity of demand of apples. What can you say about your price elasticity of

a4.a6

40. Algebra II

Identify the graph of the solution set of 8.5>6.1 +0.6y. Would the answer be all numbers 4 and greater? Thanks.

41. Flash-card maker?

Does anybody know of an online flashcard maker you don't have to print out that you can study online? Americangirl . com has a flash-card maker, but it doesn't work anymore.

42. To all tutors

Not sure if my response came through before - just wanted to say thank you for the quick response and keep up the good work :) ttfn - Canadian Student

43. calculus

dy/dx= (2x-2xy)/(x^2+2y) Find all points on the curve where x=2. Show there is a horizontal tangent to the curve at one of those points.

44. REPOST--Statistics

Ten cards, the 2 through 6 of spades and the 2 through the 6 of diamonds, are shuffled thoroughly and then taken one by one from the top of the deck and placed on the table. I know how to solve the first question (I think), but how would I solve the second

45. Physical science

In my tenth-grade-level physical science class, we're studying heat, and I completely don't get it. I'll read the definition for specific heat over and over, and I still don't understand it. "For all substances, specific heat is a characteristic physical

46. IB PHYSICS

An object in equilibrium has three forces exerted on it. A 30 N force acts at 90° from the x-axis and a 44 N force acts at 60° from the x-axis. What are the magnitude and direction of the third force? NO IDEA WHERE TO START

47. Algebra II

One number is two less than a second number. If you take one-half of the first number and increase in by the second number, the result is at least 41. Find the least possible value for the second number. HELP PLEASE!!!! I hate word problems!!!

48. COM 215

What are the main differences between your hardcopy and online submissions? i mean as far as resumes go

49. Economics

Hi, I need help with these four questions can anyone help me, it is for my economics class. 1)How does the economic (or rational decision-maker) approach to criminology work with or against other criminology theories? 2)Suppose we know that Frank has

50. Psychology/Science

Ms.Sue you helped me with the pictures of neurons yesterday. Thank you, I finally found some really good ones for my power point presentation. My assignment is to create a lesson plan for a sixth grade science class explaining what a neuron is and how it

51. math

r+1 is less than or equal to 0. What is r?

52. Physics

At the entrance channel of a harbor, the tidal current has a velocity of 4.94 km/hr in a direction 23.2° south of east. Suppose a ship caught in this current has a speed of 15.6 km/hr relative to the water. If the helmsman keeps the bow of the ship aimed

7a-8=15a+8

54. French

I want to know what are the Ils/Elles form for the following verb. S'appeler Avoir Adorer Vouloir

55. physics

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 104 m/s, and the radius of the orbit is 5.50 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has

56. BIOLOGY/EARTH SCIENCE

Hi, I was just wondering how an eroding dune and a non-eroding dune would differ, in terms of diagrams. For example, is there any site that would compare two cross-sectional shapes of the dunes? I couldn't find any on google.

57. phsyics

Posted by MELANA on Thursday, October 18, 2007 at 5:14pm. An object in equilibrium has three forces exerted on it. A 30 N force acts at 90° from the x-axis and a 44 N force acts at 60° from the x-axis. What are the magnitude and direction of the third

58. Economics

Use supply and demand analysis to explain why hotel room rental rates near your campus during parents’ weekend and graduation weekend might differ from the rates charged during the rest of the year.

59. Statistics

Ten cards, the 2 through 6 of spades and the 2 through the 6 of diamonds, are shuffled thoroughly and then taken one by one from the top of the deck and placed on the table. How many arrangements are possible? What is the probability that each card is next

60. Economics

suppose you have a factory that makes pens and the demand for the pens decline, and there are more people willing to work due to a recession. does this result in an increase in supply? please explain

61. Math

I am in dire need of assistance. Can anyone tell me the forumula/solution to transforming inqualities into equivalent inequalities with y alone on one side? I really don't understand this.

62. egyptian mummies

what was the prince of the dead?

63. Economics

could some explain what will happen from a supply/demand side if factory that makes pens and the demand for the pens decline, and there are more people willing to work due to a recession.

64. Reiny

Thanks - How many pecks in a bushell - and don't ask anyone else for the answer - only Canadians would know this.

65. Psychology-24Hour Cycle

Our tendency to feel wakeful and sleepy on a 24-hour basis depends mainly on a. a cycle generated by a mechanism in the brain b. our perception of environmental stimuli such as heat and light c. a cycle generated by hormone-producing organs such as the

66. Economics

If I have a business in producing books and the demand decrease at the same time there is a recession and I have more people willing to work. I'm assuming that my product will be less demanded and my supply will increase because more people are willing to

67. economics

Suppose you have \$30,000 in wealth and have the choice of two possible gambles: Gamble 1: a single flip of a coin would pay you \$16,000 if it is heads, cost you \$16,000 if it is tails. Gamble2: two coin flips, each payuing you \$8,000 if it is head, each

68. U.S. History

I'm have to do a essay about why the Second Amendment is important to us. I need some help writing it. Has to be at least 1000 words.

What is the difference between an LLC, Conventional corp, amd S. Corp?

70. History

Why did Jefferson as the Democratic-Republican candidate win the election of 1800? -Clearly stated thesis -Identify and describe 3 factors that influenced the outcome of the election -A conclusion that pulls the ideas together

71. english

I need to write 2 process essays. Any good ideas? I know there's so many things I can do, but it's hard to come up with a good one.

72. Chemistry

can anyone help me on my chemistry problem. i need a merck index to solve this. i have a PH of 10.7 and the nearest solution that is near to it is 10.32. The solution that is 10.32 is NaHCO3. i subtract both of them to get the ratio of log (HA)/(A-). i

73. Geometry

Given: line segment AD is congruent to line segment CD,

74. math

if absolute value of x-6 is greater than or equal to 4 which of the following must be true? A) absolute value of x > 10 B) x > 10 C) x < 2 D) x > -2 E) none of the above

75. science

How do I design a graph that shows the ratio or proportion of metal,metalloids,and nonmetals that are on the periodic table

76. Managerial finance

Can u please help me on this: High cash flow is generally associated with a higher share price whereas higher risk tends to result in a lower share price. is it true of false?? and why thx

77. Biology

What's high specific heat is mainly a consequence of the: A) high specific heat of oxygen and hydrogen atoms B) inability of water to dissipate heat into dry air D) absorption and release of heat when hydrogen bonds break and form E) fact that water is a

78. Social Studies Repost for Kim

social studies - Kim, Thursday, October 18, 2007 at 8:50pm What 3 states come together where the Ohio River joins the Mississippi River?

79. Geography

What Country lies to the East of Alaska? Why was Alaska a good addition to the United States?

80. essay again

i'm so sorry i'm posting the same thing over and over again. this is my whole essay except the conclusion. can you please read it all together and see what i can add more please. Festival of Colors India is known as a land of diversity because of its many

81. Spanish I

I'm taking a Spanish class now, but I cannot figure out how to roll my r's. Could somebody try to explain to me how to do that? :-)

82. math

In an extra-sensory-perception experiment, a blindfolded subject has two rows of blocks before him. Each row has blocks numbered 1 to 10 arranged in random order. The subject is to place one hand on a block in the first row and then try to place his other

83. english

what is an interrogative statement?

84. ENGLISH

Through their guidance and love, they have changed me in many ways. Is the above sentence grammatically correct? Thanks! :]

85. physics

We have to use simple machines to light a fire and put it out using only one force. ( turn a crank, pull a string ,ect.) Me and my partner have one idea but it hasn't worked so far. any ideas?

86. Summary of The Necklace?

I've been searching online for a short but informative summary on the book "The Necklace" by Guy de Maupassant. Does anybody know where I can find it? Thanks! =)

87. psych-Awake/Asleep

3. Our tendency to feel wakeful and sleepy on a 24-hour basis depends mainly on a. A cycle generated by a mechanism in the brain b. Our perception of environmental stimuli such as heat and light c. A cycle generated by hormone-producing organs such as the

88. Psychology-JetLag

After staying awake late many nights, Glorida has become accustomed to going to sleep late and awakening late. Now she tries to shift going to bed earlier and waking up earlier. This shift is similar to difficulties people face when they travel a. north b.

89. thesis revision

While the colors associated with Holi are the main part of this celebration, the true reason for celebrating Holi is to keep the evil spirits away. Not only is Holi a joyous, colorful festival to celebrate with friends and family, but it is also meant to

90. Math

The length of a rectangle is 14 centimeters less than twice its width. The perimeter of the rectangle is 62cm. What are the dimensions of the rectangle? Here is what I did: P=2L+2W 62=2(14-W)+2W 62=28-W+2W 28-28 ------------ 34=-W+2W +W +W ------------

91. Algebra

When you have to graph a set of 14 numbers from 15 to 210,000 on graph paper, how do you decide what intervals to use for the graph when you only have 7 lines?

92. world history

who is isaac newton?

93. French

What is the difference between "Elle aime la danse" and "Elle aime danser" ?

94. Science

The equation is HCl+Na OH-NaCl+H2O (water)

95. Chemistry - Solutions

Can the term hydration be applied to the solvent carbon tetrachloride? Explain your reasoning. If it cannot be used, what term can?

96. earth science repost!!!

Hi, I was just wondering how an eroding dune and a non-eroding dune would differ, in terms of diagrams. For example, is there any site that would compare two cross-sectional shapes of the dunes? I couldn't find any on google.

97. Writing

In the following sentence is I a propernoun? Sometimes I act fickle when I am deciding what to eat or drink.

98. Writing

What is the difference between a common noun, proper noun, possessive noun and pronoun?

99. History

Why did Jefferson as the Democratic-Republican candidate win the election of 1800?

100. TX History

Just want to be sure on this... are Tejanos english settlers from mexican decent?

101. social studies

what are the 3 discoveries of america

102. Algebra II

Having trouble factoring 3x^9- 75x

103. math

if g(t)=4+square root of 9-t, what is the smallest possible value of g(t) A) 0 B) 3 C) 4 D) 5 E) 9

104. U.s. history 2

How did WW2 influence the United nations? How did this affect its structure?

105. math

About how long does it take to get to Balmorhea,Texas from El Paso,Texas?

107. For all tutors

Is this just an American website. I am from Toronto Canada - posted a question yesterday and have not received a response. Just checking. Thanks.

108. Science.

Explain the atomic structure

The celebration of Holi only takes place for a week, but the preparations for various events begins almost forty days before the festival. One of the main events during this week is when everyone goes to a temple and performs a ritual to represent the

110. Biology

Why can carboxyl and phosphate groups act as acids?

111. math

Ronald made a trip of 450 miles in 8 hours. Before noon he avg. 60 miles per hour, and after noon he avg. 50 miles per hour. At what time did he begin his trip and when did it end?

112. Reiny

Thanks - How many pecks in a bushell - and don't ask anyone else for the answer - only Canadians would know this.

113. Biology

General question: do polypeptides only make up proteins and not carbohydrates? and can they be formed by dehydration synthesis?

114. chemistry

Why isn't sucrose an electrolyte

115. science

i am doing a particle movement stuy sheet and i need to knoe if gas is compressed(push) then what is the distance

116. science project

i need help comeing up with a question for my topic? topic:how do perservitives affect the growth of microorganism? Question:??

117. Math

I need some ideas on how General Motors can gain market share, what are some of the recommandations for them. Thanks.

119. Science

How do balance an equation?

121. AP CHEMISTRY

STATE THE HEISENBERG UNCERTAINTY PRINCIPLE AS IT RELATED TO THE DETERMINING THE POSITION AND MOMENTUM OF AN OBJECT.

122. Ecomomics

Hi, I need help with these four questions can anyone help me, it is for my economics class. 1)How does the economic (or rational decision-maker) approach to criminology work with or against other criminology theories? 2)Suppose we know that Frank has

123. French

This is from my text. It says : C'est delicieux, les pommes." But les pommes is feminine, so should it be delicieuses instead?

124. English

I have to write a concise precis of a short story that I read, consisting of 130 words. What is a 'precis'?

125. Geography

If you go East from Madagaser what is the first continent will you run into?

126. Science

How can I design a study guide to use when studying the periodic table?

127. Simple machines: physic science

We have to use simple machines to light a fire and put it out using only one force. ( turn a crank, pull a string ,ect.) Me and my partner have one idea but it hasn't worked so far. any ideas?

128. REPOST biochem

i don't understand this why can carboxyl and phosphate groups act as acids? as in, what makes an acid?

129. world history

what were all of Isaac Newton's inventions or discoveries?

130. Chemistry - Solutions

What do all solutions of electrolytes contain that solutions of non-electrolytes don't contain?

131. world history

im not aloud to use wikipeida