1. CHEMISTRY

Balance the oxidation reduction equation in half reaction PbO2 + KCl => KClO + KPb(OH)3 thank you a lot

2. Physics

15. A refrigerator weighing 1500 N is to be lifted onto a truck bed that is 1.0 m above the ground. When pushed up a slanting ramp 2.0 m in length a force parallel to the ramp of only 800 N is required to move it at constant velocity. Comparing the work

Assume 450,000 people line up on the streets to see the Macy's Thanksgiving Parade in 2010. If attendance is expected to increase 30%, what will be the number of people lined up on the street to see the 2011 parade?

4. PHYSICS

a 2.00kg object A is connected with a massless string across a massless, frictionless pulley to a 3.00kg object B. the smaller object rests on an inclined plane which is tilted at an angle of theta=40degrees. what are the acceleration of the system and the

5. Chemistry

How many milliliters of O2 are consumed in the complete combustion of a sample of hexane, C6H14, if the reaction produces 325 mL of CO2? Assume all gas volumes are measured at the same temperature and pressure. The reaction is 2C6H14(g) + 19O2(g) ->

6. marh

The radii of two circles are in the ratio of 3 to 1. Find the area of the smaller circle if the area of the larger circle is 27 sq. in.

7. Algebra

Two boys are throwing a baseball back and forth. The ball is 4 ft above the ground when it leaves one child’s hand with an upward velocity of 36 ft/s. If acceleration due to gravity is –16 ft/s2, how high above the ground is the ball 2 s after it is

8. calc

Find the centroid of the region bounded by the given curves. y = 2 sin 3x, y = 2 cos 3x, x = 0, x = π/12

9. economics

Wireless high speed internet is provided for free in the airport of the city of communityville. a) At first, only a few people use the service. What type a good is this and why? It’s a public good because it is neither excludable nor rival in

10. Physics

A stone is thrown upward from a bridge at a speed of 10 m/s. It narrowly misses the bridge on the way back down, and hits the water at 30m/s. what is the approximate height of the bridge?

11. Geometry

Point T is in the interior of ∠PQR. Find the m∠PQR if the following conditions apply. The m∠PQR = (10x - 7)°, the m∠RQT = 5x°, and the m∠PQT = (4x + 6)° The ﻿m∠PQR is=

12. CHEMISTRY

Why the oxidation number of ( H ) is -1 in 1) N2H4 2) CaH2 while ( N ) is different from ( Ca ) ?

13. Science

State in words the specific information conveyed by a label reading of 0.25M oxalic acid

14. History

Why were the 1920s a tale of two nations? That is why did one sector the economy already experience a depression while another part of the economy boom? Be sure to identify which sector boomed and which sector was already in a depression. Why does the

A net torque of 54 N.m is applied to a disk with a rotational inertia of 13.2 kg.m2 What is the rotational acceleration of the disk?

16. CHEMISTRY

The Ksp of (hydroxyapatite ) Ca5(PO4)3OH is 6.8 * 10^-37 , and its molar concentration is 2.7 * 10^-5 mol/L ,, if this (hydroxyapatite) reacts with fluoride , then the F- ions replace OH- ions and the product is Ca5(PO4)3F ,, if we know the Ksp of (

17. Statistics

The life of an electric light bulb is known to be normally distributed with a mean of 2000 hours and a std. of 120 hours. Find the probability that the life of such a bulb would be. (a) greater than 2150 hours (b) within the range of 1850 hours to 2090

18. US Government

Public opinion is crucial in a democracy, for if we are truly a government "for the people, by the people," it is then essential that we know what the people think and want. True or false?

19. math

A ship model is 0.5% actual size. If the model is 1 meter long, what is the actual length of the ship?

20. physics

On a 60 km straight road,a bus travels the first 30km with a uniform speed of 30kmh .How fast must the bus travel the next 30 km so as to have average speed of 40 kmh for entire trip.

21. Physics

A bullet is fired horizontally from a height of 4.9 m with a velocity of 680 m/s. How far away does the bullet land? A) 680 m B) 340 m C) 1360 m D) 170 m E) 800 m

22. Algebra

If you multiply a trinomial by a monomial, what type of polynomial will the product be? A. a monomial B. a binomial C. a trinomial D. it is not possible to determine

23. science

A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 4.8 x10^10 m (inside the orbit of Mercury), at which point its speed is 9.1 x10^4 m/s. Its farthest distance from the Sun is far beyond the orbit of Pluto.

24. questions

Coumadin Take 5mg on even days, take 2.5 mg on odd days Disp: 30 days supply 6. If the stock supply is only 5mg tablets, how many tablets will be required to fill the prescription? tablets

25. trigo

The terminal side of angle θ lies on the line y=-mx for m>0 and x>0.calculate the values of the trigonometric function

26. statisticss

The time taken by a man to deliver milk is normally distributed with, mean 12 minutes and standard deviation 2 minutes. He delivers milk everyday estimate the probability that he takes. (a) longer than 17 minutes (b) between 9 and 13 minutes

27. Physics

A car traveling with an initial velocity of 15.5 m/s accelerates at a constant rate of 3.0 m/s2 for a time of 3.6 seconds. (a) What is its velocity at the end of this time? A) 26.3 m/s B) 18.5 m/s C) 10.8 m/s D) 22.1 m/s E) 19.1 m/s

28. Physics

1. You are looking into a current carrying solenoid and notice that the compass needle indicates that you are at the south end of the magnetic field. What is the direction of the current in the coil and how do you know? Would it be clockwise because

29. chemistry

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g), if 48.6 g of Mg and 150.0 g of HCl are

30. math

What number sets does square root 3 belong to?

31. ph

Flagyl 250mg q8h x7D. What is the total daily dose

32. calculus

the time required for one complete oscillation of a pendulum is called its period. if the length L of the pendulum is measured in feet and the period P n seconds, then the period is given by P=2¶(L/g)^1/2, where g is constant. use differentials to show

33. Physics

a student pushes on a desk with a force of 75 N causing it to begin sliding. if the desk weighs 400 N then calculate the coefficient of static friction between the desk and the floor

34. CHEMISTRY

In relative oxidizing and reducing agents table ; 1) Is Al oxidized by Ni+2 2) Is Cu oxidized by Ag+ 3) Is Pb oxidized by Na+ 4) Is F2 reduced by Cl- 5) Is Br2 reduced by Cl- and if you or no , how it is as a rule to predict any ? thank you

35. Physics

Jeffrey wants to swim his girlfriend who is straight across from him, on the other side of a river bank. The river has a current velocity of 4km/h [W]. The width of the river is 300m. If it takes Jeffrey 15 minutes to reach her, a) how fast should the boy

36. physics

what is the resultant of two 65N identical one acting easterly and the northerly

37. Physics

Car A travels with speed v around curve number one, which has a radius r. Car B travels with speed 2v around curve number two, which has a radius 2r. What is the ratio of the two accelerations A/B? A) 2 B) 4 C) 1/2 D) 1/4 E) 1

38. Chemistry

Methane is formed in landfills by the action of certain bacteria on buried organic matter. If a sample of methane collected from a landfill has a volume of 200. mL at 741 torr and 27.2 °C, how many grams of methane are in the sample?

39. math

The given curve is rotated about the y-axis. Find the area of the resulting surface. y = 3 − x2, 0 ¡Ü x ¡Ü 4

40. Physics

Your mass is 50 kg. Suppose you are standing on a scale in an elevator which starts moving up and increases its speed at the rate of 2 m/s every second. What would be the reading on the scale? A) 590 N B) 490 N C) 390 N D) 100 N E) 0

41. English

1. I have lived in New York for 12 years. 2. I have been living in New York for 12 years. ---------------- #1 is grammatical? What about #2?

42. Physics

A student is skateboarding down a ramp that is 8.33 m long and inclined at 24.5° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 4.12 m/s. Neglect friction and find the speed at the bottom of the ramp.

43. History

What made the Great Depression unprecedented? Were the measures taken to end the longest economic downturn in American history consistent with the principles of the Progressive Era or a radical redirection in American history?

44. mechanism physics

if a 10kg block with a velocity of 10m/s collide with a stationary block of 5kg , after collission the two blocks move stick together.calculate the velocity after collision for a 10 kg block?

45. math

5.Escape velocity is the speed necessary to escape the gravitational pull of a plant. The escape velocity of Earth is 11.3 kilometers per second, while the escape velocity of Saturn is 310% of that. What is the escape velocity of Saturn?

46. Physics

A girl on a sled with a total mass of 90kg starts from an elevation of 100meters. At the bottom of the run her speed is 30m/s. How much energy in joules was lost due to friction?

47. pharmacy calculations

Coumadin Take 5mg on even days, take 2.5 mg on odd days Disp: 30 days supply If the stock supply is only 5mg tablets, how many tablets will be required to fill the prescription? If the stock supply is only 2.5mg tablets, how many tablets will be required

48. Math

I have 3 questions: 1) If ABC and DEF are three- digit numbers, which of the following could be the number of digits in the product of ABC and DEF? i. 4 ii. 5 iii. 6 I don't have the vaguest idea on how to do this and what type of math it is part of... My

49. History

Why did the US economy lurch from boom to bust between 1920 and 1930? How did politicians try to restore prosperity?

50. Geography

Is Greenland part of North America?

51. Chemistry

A 56 g sample of peanut oil has a volume of 60.9 cm^3. Calculate the density of the peanut oil.

52. Math

Ship A heads north at a speed of 22.2 km/h while ship B heads east Twenty two hours later they are 863 km apart

53. math

3.Students at one school sell magazine subscriptions to raise money for athletic equipment. The school keeps 20% of sales. How many dollars worth of subscriptions must be sold to make \$1500?

54. Math

the time required for one complete oscillation of a pendulum is called its period. if the length L of the pendulum is measured in feet and the period P n seconds, then the period is given by P=2¶(L/g)^1/2, where g is constant. use differentials to show

55. History

Outline the origins and effects of the Progressive Movement. How was this movement affected by World War I?

firstly write a program to accept the number of telephone calls made by a customer and the print out the rate in cents. secondly define a structure employee with name, category , salary, tax as a member. read the name category and salary of employee and

57. English

1. I haven't seen you for a while. 2. I haven't seen you in a while. 3. I haven't seen you for ages. 4. I haven't seen you in ages. 5. I haven't seen you for a long time. ------------ Are they all grammatical and the same?

58. MATH

need word problem help. One half of the total budget of \$5,000 was for salaries. Three fifths of that amount was paid to 4 employees. How much of the budget was spent on employees? 1/2 of 5,000 = 2,500 2500 divided by 3/5 = 4166 2/3 Am I on the right

59. science

How much heat must be removed from 0.20kg of water at 10.0oC to form ice at 0oC?

60. maths

QR is parallel to ST and PQ:QR = 2:1. Given the area of triangle PST is 18cm2, the area of triangle PQR in sq cm is?

61. CHEMISTRY

In half reaction method of the chemical equation balancing , how about those redox reactions that they don't contain any (H) and ( O ) atoms ?

62. Environmental Science

In two or three well-developed paragraphs, summarize how the reproductive behavior of individuals can affect the growth rate of their population.

63. geography

List as many ways as you can remember about how you are involved in the burning of fossil fuels on a dily basis.

64. Math (statistics)

In an examination a candidate is given the four answers to four questions but is not told which answer applies to which question. He is asked to write down each of the four answers next to its appropriate question. b). show that there are 6 ways of getting

65. math

It is important for Bob to have a gross salary in his fifth year of at least \$100,000. He is promised salary increases of 3 percent per year in the second and third years and 5 percent thereafter. What must be his starting salary be to achieve his goal? My

66. Chemic

Hello could you help me answer to one question please. From 98% Sulphuric acid to make 50ml 5% sulphuric acid How to DIlute with water , how much need ?

67. physics

a man weighing around 260 pounds falling 5.5 feet vertically would have generated a force of how many pounds?

68. Physics

You measure a uniform electric field of 13.3 x 10^3 N/C between two equipotential surfaces. One surface is at a potential of 1543 V and the other is at 951 V. What is the separation between the two surfaces? How would I solve this?...What equations would I

69. Math

Write a formula expressing the information: i)Rose paid twice as much as Mike I used R for Rose and M for Mike The formula I cam up with is R=2M ii)Taxes are 6 percent of income [Use T and x] So I wrote it like this T(0.06)/X iii)There are twenty times as

70. question

Flagyl 250mg q8h x7D. What is the total daily dose?

71. physics

Regarding "Period of Mass on a Spring", What will the oscillation period be if the stiffness of the spring is reduced? Will it become shorter, longer, or unchanged?

72. sentence fragment

Both Egypt and Mesopotamia developed an organized government that consisted of one ruler maintaining order, but Egypt had a centralized authority while Mesopotamian political powers was more distributed among all the city-states. This is a topic sentence

73. Quest

How do you write 9th july 2014 in 5 letters without using numbers ?

74. us history

The Quasi War was waged between the United States And?

75. English

1. He has studied math for three hours. 2. He has been studying for three hours. ---------------- Are both grammatical? Which one is commonly used?

76. Algebra

I am trying to solve the following using the Quadratic Formula but I am confused. Can you explain the steps? Solve (find all complex-number solutions): t^2 + 3 = 6t Thank you

if the bare main contact conductors a a hoist are 21 meters long and do not have intermediate supports , the smallest copper wire that may be used for the conductors is

78. History

How did World War II transform American society? Was the impact of the conflict as profound on American society as it was on America's position in the world?

79. English

There are many balls. 1. Some are blue, and others are yellow. 2. Some are blue, and some are yellow. 3. some are blue, and the others are yellow. 4. some are blue, some are yellow, and some are white. 5. some are blue, others are yellow, and some are

80. Physics

Two parallel wires both carry currents directed from left to right .A circular wire loop lies in the plane of the two wires, mid-way between them.As always, assume the currents are positive charges. Sketch the changes in magnetic fields induced and the

81. math

In order for a spacecraft to reach Earth's orbital velocity, it must achieve a speed of 17,500 mph in 610 seconds after its first stage burnout where it should have achieved a speed of 1530 mph. What percent increase in speed per second is necessary after

82. Chemistry

A mixture of N2, O2, and CO2 has a total pressure of 928. torr. In this mixture the partial pressure of N2 is 31.0 cm Hg and the partial pressure of O2 is 4.00 dm Hg. What is the partial pressure of the CO2 (in torr)?

83. Physics

Two charged particle are fixed on the x-axis 11 cm apart. The one on the left has a net charge of +25uc and the one on the right has a net charge of -11uc. What is the magnitude of the electric field 10 cm to the right of the negative charge? How do you

84. Physics

Do Newton's Law apply to motion inside your car? A.Yes, but only when at rest. B.Yes, but only when traveling at constant velocity or at rest. C.No, never. D.Yes, always. So I tried answering the question with D at first because I was thinking that it is a

85. Physics

Due to a strong wind from the west of 65 km/h, a plane ends up traveling 330 km/h [W 15 S] relative to the ground. What was the magnitude of the velocity of the plane relative to the air in km/h?

86. psychology

How has Maslow's hierarchy of needs affected public policy?

87. chemistry

What is the mass of water obtained when mix 100.0 mL of 2.5 M. HNO3 with 100.0 mL of 2.55 M. KOH?

88. Physics

A ball is thrown as a projectile with a horizontal velocity of 30 m/s and a vertical velocity of 30 m/s. At the highest point which of the following is true? A) The velocity is zero B) The acceleration is 0 C) The acceleration is 9.8 m/s2 D) The

89. Physics

Car A travels with speed v around curve number one, which has a radius r. Car B travels with speed 2v around curve number two, which has a radius 2r. What is the ratio of the two accelerations A/B? A) 2 B) 4 C) 1/2 D) 1/4 E) 1

90. English

1. They have eaten Korean food before. 2. They ate Korean food before. 3. They had eaten Korean food before. ----------- Are they all grammatical? Then what is the difference among them?

91. PHI208: Ethics and Moral Reasoning

What other similarity can we find in Freeman’s stakeholder theory with Kant’s moral theory

92. PHI208: Ethics and Moral Reasoning

Which one of these is not a principle that can be drawn from the Categorical Imperative?

93. Math 221

What is 5(8+v)= Please break it down for me to get a better understanding?

94. English

1. It has been such a long time. -------------------- What does 'It' refer to in Sentence 1? Does 'It' an impersonal pronoun referring to 'the time'?

95. History

What were the effects of Reconstruction on American life?

96. History

How did the Gilded Age transform American life? How was the economy, society, and culture changed?

97. English

1. I have had many different jobs. 2. I have had two jobs. --------------------- Does #2 mean that he has two jobs now? Does #1 mean that he has many different jobs now? Or does #1 mean that he has ever experienced having many different jobs?

98. History

How did World War II transform American society? What were the internal and external effects?

99. CHEMISTRY

Assume that the ( S ) ( S ; alphabet ) is the solubility in mol/L of AB2 compound , , then what is the concentration of A and B ? and what is the Ksp of AB2 compound ? thank you a lot

100. science

A student expends 9.6W of power lifting a textbook 0.50m in 3.0s with a constant velocity. How much work is done?

101. APPLICATION PROGRAMMING

Write a formular on aprogram to generate the following patterns

102. physics

15 KG HEIGHT 200 METERES WHAT IS THE CHANGE IN TEMPERATURE

103. chem/math

I need help solving for x here (I don't get the right answer, which is supposed to be x=0.137) 3.88 = 3.74 + log (x/0.1) Please explain how you would get that answer Thank you

104. statistics

What formula do I use to solve: A sample with a mean of M = 40 and a variance of s2 = 20 has an estimated standard error of 2 points. How many scores are in the sample?

105. Precal

What is the first natural number that causes the statement:(2 + 3)n 4n + 3n to fail?

106. chemistry

A student didn’t read step 4 in the procedure and assembled the cells based on Figure 1, connecting the device to the ammeter right away. When she gets to step 5 she realizes her error, but instead of estimating the initial reaction time she simply notes

107. Math

what is the maximal number of consecutive 3-digit numbers that have at least one odd digit?

108. Chemistry

When a sample of neon with a volume of 683 mL and a pressure of 0.792 atm was heated from 19.0 to 76.0 °C, its volume became 733 mL. What was its final pressure (in atm)?