1. physics

If a simple machine provides an increased output force, what happens to the output distance? Can someone please help

2. AP CHEMISTRY

A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH-] is 1.0 x 10^-2 M. Some Fe(OH)2 precipitates. The value of Ksp for Fe(OH)2 = 8.0 x10^-10. A. Assuming that the hydroxide is 1.0 x

3. Pre-Algebra

Write a rule for the linear function in the table. x f(x) –4 16 0 0 4 –16 8 –32 A. f(x) = –4x B. f(x) = x + 16 C. f(x) = 4x D. f(x) = x

4. chemistry

Calculate the mass of Li formed by electrolysis of molten LiCl by a current of 7.5X10^4 A flowing for a period of 24 hours. Assume the electrolysis is 85% effective.

5. chemistry

What would the final freezing point of water be if 3 mol of sugar were added to 1 kg of water (Kf = 1.86C/(mol/kg) for water and i = 1 for sugar)?

6. physics

a pendulum consists of a wooden bob of mass m and length l. A Bullet of mass m1 is fired towards the pendulum with a speed v1.the bullet emerges out of the bob with a speed v1/3 and the bob just completes motion along a vertical line ,then v1 is?

7. Chemistry

At a certain temperature the vapor pressure of pure benzene is measured to be 322. torr . Suppose a solution is prepared by mixing 138.g of benzene and 91.2g of heptane . Calculate the partial pressure of benzene vapor above this solution. 3 sig figs!

8. physics

28. A 20-N force applied to the handle of a door produces a 44-N output force. What is the AMA of the handle? Show your work.

9. physics

A 40-g block of ice is cooled to −71°C and is then added to 590 g of water in an 80-g copper calorimeter at a temperature of 27°C. Determine the final temperature of the system consisting of the ice, water, and calorimeter. (If not all the ice melts,

10. Chemistry

What amperage is required to plate out .250 mol Cr from a Cr+3 solution in a period of 8.00 h?

11. chemistry

For the titration of 50.00 mL of 0.1000 M ammonia with 0.1000 M HCl, calculate the pH (a) before the addition of any HCl solution, (b) after 20.00 mL of the acid has been added, (c) after half of the NH3 has been neutralized, and (d) at the equivalence

12. physics

A wet bar of soap slides freely down a ramp 2.0 m long inclined at 6.8o. How long does it take to reach the bottom? Neglect friction.

13. physics

what effect did scientists originally think that the intensity of light shining on a photosensitive surface would have on electrons ejected from that surface?

14. physics

a man of 50kg is standing on one end on a boat of length 25m and mass 200 kg .if he starts running and when he reaches the other end ,he has a velocity 2m/s with respect to the boat .the final velocity of the boat is?

15. math

Suppose T varies directly as the 3/2 power of x. When x=16, T=160. Find T when x=4

16. physics

a ball striking a horizontal plane with a velocity v rebounds with a velocity 256v/625 after 4th collision. the coefficient of restitution is?

17. s.s help

1. In a typical rural village in Mexico, you might expect to find that most people living on farms get their food by (1 point)growing their own. buying what they need at large supermarkets. buying what they need at small markets. gathering nuts and wild

18. Chemistry lab

1) Using the 1st equivalence point from part a calculate the molarity of the phosphoric acid. Molarity of NaOH = .1523 M Volume of phosphoric acid used 10.0mL Volume at equivalence point 7.410 mL and 14.861 mL 2) Using the 2nd equivalence point from part

19. College physics

A 0.006 00-kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1-kg door, imbedding itself 10.9 cm from the side opposite the hinges as in the figure below. The 1.00-m wide door is free to swing on its frictionless hinges. At what

20. physics

A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C−1). At room temperature (20.0°C), the frames have circular lens holes 2.27 cm in radius. To what temperature must the frames be heated if lenses 2.28

21. physics

How do you know that a sealed calorimeter is a closed system? because temperature is consurved because the masses of the sample and water are equal because thermal energy is not transferred to the environment because work is done on the test sample Please

22. Chemistry

The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and (delta) E for melting 1.00 mol of ice at 0 deg. C and 1.00 atm pressure.

23. physics

Which of the following statements is a consequence of equation E=mc^2? Energy is released when matter is destroyed Mass and energy are equivalent The law of conservation of energy must be modified to state that mass and energy are conserved in any process

24. chmistry

the volume of a sample of helium is 4.5ml at 20.0c and 203.0kpa. what will its volume be in the figure?

25. chemistry

When 50.0 mL of 0.050 M formic acid, HCHO2, is titrated with 0.050 M sodium hydroxide, what is the pH at the equivalence point?

26. AP CHEMISTRY

A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH-] is 1.0 x 10^-2 M. Some Fe(OH)2 precipitates. The value of Ksp for Fe(OH)2 = 8.0 x10^-10. (A) Assuming that the hydroxide is 1.0

27. Algebra I

Please show me how to solve: The value of a \$20,000 car decreases every year, t. The equation below models this situation: 20000(1-0.04t)=13,000. After how many years will the car be worth \$13,000. Round to the nearest tenth if necessary.

28. sCIENCE PLZZZZZZZZ HELP

1. The surface tension in a cup of water is caused by ____. (1 point)attractive forces between the water and its container attractive forces between water molecules adhesive forces between water molecules adhesive forces between the water and its container

29. physics

A spring whose spring constant is 650 N/m is compressed 0.300 m. What speed (in meters/second) can it give to a 0.300 kg ball when released

30. chemistry

Nitrogen monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). Write a balanced equation for this reaction. the reaction is experimentally found to be (approximately) first-order in H2 and second-order in NO. Write down the form of the

A ball bounces to 45 percent of its original height. What fraction of its mechanical energy is lost each time it bounces? What is the coefficient of restitution of the ball-floor system?

32. microsoft excell 2007

helga needs to lay out her newly created pivot table.what are the two ways she can set up a pivot table? (a)when helga created the pivot table ,excel automatically put the fields to the appropriate cells of the pivot table.there are not two ways to set up

33. english

Hi I have to compare Mending Wall by Robert Frost to modern day time. I was thinking about comparing it to a song or movie, but I'm not sure of any. Do you have any ideas?

34. Chem Lab

Can the NH3/NH4Cl system be sued to prepare a buffer of a pH 9.5? why or why not? Can it prepare a buffer of pH 5? There were two buffers, 0.2 M and 0.1M.

35. math

1. You want to survey people about their favorite exercise. Which sample below is more likely to be random? (1 point)You ask people on a jogging track in a park to name their favorite exercise. You ask people on their lunch hour at a downtown intersection

36. maths

an arc of a circle subtends a central angle of 5pi/6 radians.if the radius of the circle measures 10.6cm, determine the approx measure of the arc leanth

37. Physics

A submarine called the DeepView 66 is currently being built to take tourists on undersea tours along tropical coral reefs. According to the guidelines of the American Society of Mechanical Engineers, to be safe for human occupancy the submarine must be

38. physics

A charge of 2.1 nC and a charge of 4.7 nC are separated by 57.90 cm. Find the equilibrium position for a -4.7 nC charge. ____ cm from the 2.1 nC charge. what is the answer? and how did you get it? thaanks

39. physics

A 40-kg block of ice at 0°C is sliding on a horizontal surface. The initial speed of the ice is 7.0 m/s and the final speed is 4.7 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction

A ball bounces to 45 percent of its original height. What fraction of its mechanical energy is lost each time it bounces? What is the coefficient of restitution of the ball-floor system?

41. Accounting

Identify whether each description best applies to a periodic or a perpetual inventory system. a. Provides more timely information to managers. b. Requires an adjusting entry to record inventory shrinkage. c. Markedly increased in frequency and popularity

42. physics

Which has the greater IMA: a screw with closely spaced threads or a screw with threads spaced farther apart? Can someone answer this

43. physics

Again, I know I keep posting questions but I'm begging you for help. At 25°C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr. What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of

44. physic

a bullet is fired from the ground at the angle of 30 degree above the horizontal,What initial speed must the bullet have in order to hit a point 250 ft high on a tower located 400 ft away (ignoring air resistance),what the solution?

45. Physics

A cylindrical 7.00-kg reel with a radius of 0.60 m and a frictionless axle, starts from rest and speeds up uniformly as a 3.00-kg bucket falls into a well, making a light rope unwind from the reel (Fig. P8.36). The bucket starts from rest and falls for

46. physics

a simple pendulum of length 0.2m has bob of mass 5gm, it is pulled aside through an angle 60 degrees from the vertical. a spherical body of mass 2.5gm is placed at the lowest position of the bob. when the bob is released it strikes the spherical body and

48. Physics

An auto race is held on a circular track. A car completes one lap in a time of 19.2 s, with an average tangential speed of 39.8 m/s

49. physics

a ball of mass m , moving with uniform speed, collides elastically with another stationary ball.the incident ball will lose maximum kinetic energy when the mass of the stationary ball is?

50. microsoft excell 2007

when working with predefined formulas in excel,what category contains the boolean functions? (a)math and trig (b)recently used (c)logical (d)auto sum my answer is c debbie needs to print her table.which of the following is not an excel print program?

51. physics

What is the minimum work in joules needed to push a 1540 kg car 44.0 m up a 12.5 degree incline?

52. chemistry

how many grams of ammonia (NH3) will react with 27.8 grams of nitric oxide (NO)? 4NH3 + 6NO d 5N2 + 6H2O

53. math

A map has a scale of 1/2 inch to 4 miles. The shortest distance between two cities on the map measures 8 inches. If d represents the shortest distance between the two cities, what is d?

54. Analy Chem

Consider the titration of 100.0 mL of 0.110 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added and make a graph of pH versus Va:Va = 0,2,5,8,10,10.1,11,11.1, and 12mL. Compute Ve, first.

55. U.S. History

Which one of these was not the causes of the Great Depression? excessive income taxes speculative stock purchases risky banking practices severe drought I think it is excessive income taxes or severe drought. But I don't think it is severe drought because

56. Chemistry

Which of the following is the most effective buffer system for a pH value of 7.45? Assume all are 1M A. Carbonic acid and sodium bicarbonate B. Sodium bicarbonate and sodium carbonate C. Sodium dihydrogen phosphate and disodium hydrogen phosphate D

57. physics

Two equal weight monkeys each hang from the ends of a rope passing over a weightless, frictionless pulley. If one accelerates up the rope, what happens to the other?

58. chemistry

The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium

59. microsoft excell 2007

entering the formula=SUM(C5:C18)is cell C19 will resolve in which of the following? (a)cells C5 and C18 will be added together (b)cells C5 and C18,and C19 will be added together (c)the total of cells C5 to C19 will appear in cell C19 (d0the total of cells

60. Science - Physics

Some helium at 20.0psi gauge pressure occupies 40.0ft^3. find its volume at 32.4 psi if the temperature remains constant.

61. prealgebra

you play a CD that has 11 songs using the random setting find the probability that the CD player plays songs 3 first and then song 5.

62. physics

Please decide which of the following statements for car collisions are true or false. 1)Crumple zones on cars are parts of the front of the car that are designed to receive maximum deformation during a head-on collision. The essential safety benefit of

63. chemistry

At room temperature (about 20C) milk turns sour in about 64 hours. In a refrigerator at 3C, milk can be stored for about three times as long before turning sour. (i) Determine the approximate activation energy for the reaction that causes milk to sour, and

64. Science

1. The surface tension in a cup of water is caused by ____. (1 point)attractive forces between the water and its container attractive forces between water molecules adhesive forces between water molecules adhesive forces between the water and its container

65. physics

two perfect elastic balls of same mass m are moving with velocities u1 and u2 . they collide elastically n times. the kinetic energy of the system finally is?

66. physics

You need to determine the density of a ceramic statue. If you suspend it from a spring scale, the scale reads 35.4 N. If you then lower the statue into a tub of water, so that it is completely submerged, the scale reads 12.4 N. What is the density?

67. physics

A space shuttle orbiting Earth at an altitude of 295 km completes an orbit in 90.0 min. Calculate its acceleration and compare it to the acceleration at Earth’s surface.

68. Environmental Science

23. During the period of human history known as the ____, human populations grew rapidly because of advances in farming methods. a. Industrial Revolution b. "Tragedy of the Commons" c. agricultural revolution d. hunter-gatherer period C? But it could also

69. Math

Jamaal is planning to invest up to \$23000 in City Bank or State Bank. He wants to invest at least \$4000 in City Bank, but not more than \$16000; since State Bank does not insure more than \$8000, he wants to invest no more than this amount in State Bank. The

70. Math

a map of a country uses a scale of 2 inches = 19 miles. If the country is 76 miles wide, how wide is the map?

71. math

a standard deck of playing cards contaons 52 cards in for suits of 13 cards each. two suits are red and two suits are black. find each probability. assume the first card is replaced before the second is drawn. (balck,Queen) (black,Diamond) (jack,Queen)

72. physics

a ball falls vertically onto a floor , with momentum p,and then bounces repeatedly.the co-efficient of restitution is e.the total momentum imparted by the ball is

73. chem

The amount of iron in a meteorite was determined by a redox titration using KMnO4 as the titrant. A 0.4408 g sample was dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+. Titrating with 0.0220 M KMnO4 requires 41.38 ml to reach the

74. government

Using the Internet, encyclopedia, and/other reference material for research, write a 1,000-word report on feudalism in the history in one of the following countries: •France •England •Germany Include the approximate years when feudalism began and

75. prealgebra

you play a CD using the random setting. Are the selections of the first two songs that are played independent or dependent event?

76. chemistry

the molar heat capacity of water at 25 degrees celsius is 75.29JK/mol. an exothermic reaction with -5.00kJ proceeded to completion in a 200mL dilute aqueous solution,initially at 16.0 degrees celsius. what is the final temperature of the solution ? clearly

77. Physics - Matter

The build-up of plaque on the walls of an artery decreases its diameter from 1.1 cm to 0.60 cm. If the speed of the blood flow is 0.15 m/s before reaching the region of plaque build-up, find the speed of blood flow within the plaque region. [3 marks]

78. chem 101

Biphenyl (C1 2H1 0) burned in a bomb calorimeter in order to determine its heat of combustion. The heat capacity of the calorimeter was 5.86 kJ/°C When 0.514 g of biphenyl was burned, the temperature of the calorimeter increased from 25.8 °C to 29.4 °C.

79. Chemistry

Household vinegar is acqueous 5.00%,acetic acid solution(by mass),if its density is 1,01 g/ml.calculate the mole fraction!molarity,and molality of the solution.

80. algebra

The length of a rectangle is 4 times its width. If the length of the rectangle is cut in half, the new perimeter is which percent of the original perimeter

81. SS7R - Bill of Rights Project - 8th Amendment

8th Amendment The Eighth Amendment to the United States Constitution is the part of the United States Bill of Rights prohibiting the federal government from imposing excessive fines or cruel and unusual punishments. Excessive hail shall not be required nor

82. maths

Angle a lies in the second quadran and angle b lies in the third quadrant such that cos a = -3/5 and tan b = 24/7. Determine an exact value for cos (a+b), sin(a-b)

83. Math

Jake spent 3/8 of his money on a book and 1/2 of what was left on a magazine. He now has \$6.25. How much money did he start with?

84. science

2. An electric fan having a radius of 0.5 m is running on HIGH. After the LOW button is pressed, the angular speed of the fan decreases to 83.8 rad/s in 17.5 s. the deceleration is 42.0 rad/s2. Determine a) The initial angular speed of the fan b) the

85. Maths

The Giant Ferris Wheel has a radius of 30meters. Assuming that a time t= t_0 , the wheel rotates counterclockwise with a speed of 40m/min, and is slowing at a rate of 15m/min^2 . Find acceleration vector for a person seated in a car at the lowest point of

86. chem 101

Biphenyl (C1 2H1 0) burned in a bomb calorimeter in order to determine its heat of combustion. The heat capacity of the calorimeter was 5.86 kJ/°C When 0.514 g of biphenyl was burned, the temperature of the calorimeter increased from 25.8 °C to 29.4 °C.

87. Physics

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.120 m). The charges on the circle are -4.40 µC at the position due north and +5.00 µC at the position due east. What is

88. physics

A hollow aluminum cylinder 22.0 cm deep has an internal capacity of 2.000 L at 21.0°C. It is completely filled with turpentine at 21.0°C. The turpentine and the aluminium cylinder are then slowly warmed together to 87.0°C. (The average linear expansion

89. math-inequalities

graph solution set of system of inequalities x+y< 4 x-2y>6

90. chemistry

Write a balanced equation showing the solubility equilibrium reaction of solid calcium hydroxide??

91. social studies

What are words that start with Z and X and have to do with the Revolutionary War?

92. physics

The angle of incidence of light passing from air to a liquid is 38 degrees.The angle of refraction is 24.5 degrees. What is the index of refraction of the liquid

93. math

find the number of two digit natural numbers such that the tens digit is greater than the units digit.

94. chem

0.1802 g sample of a chlorocarbon compound was analyzed by burning in oxygen and collecting the evolved gases in a solution of sodium hydroxide. After neutralizing, the sample was treated with 39.50 mL of a 0.025 M AgNO3. This precipitated the Cl- as AgCl

95. physics

You need to determine the density of a ceramic statue. If you suspend it from a spring scale, the scale reads 35.4 N. If you then lower the statue into a tub of water, so that it is completely submerged, the scale reads 12.4 N. What is the density?

96. math

if you tossed two number cubes, what sum has the greatest probability of occuring? Explain.

97. Science

A weight lifter lifts a barbell from the ground, raises it at a constat velocity and holds it motionless over his head. How does the force of the lifter compare with the wieght of the barbell at different stages of the lift?

98. Chemistry

a 3.67L flask is filled with carbon monoxide at 27 degrees C until the pressure is 1.27 atm. Calculate the total pressure after 3.42 moles of carbon dioxide has been added to the flask. (R=0.082 L-atm/K mol)

99. enviromental science

what are the two causes of density in deep current waters.

100. Basic Algebra

The width of a rectangle is x inches long. The length of that rectangle is 5 inches less than Twice the width. If the perimeter measures 26 inches, what is the measure of the length and width of the rectangle. Show all the work and the algebra you used to

101. chemistry

The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium

102. physics

a neutron of mass 1.67*1o power of (-27) is moving with a velocity 10 to the power of(6) collides with a deuteron of mass 3.34*10 to the power of (-27) kg at rest .after collision if both have single particle find its velocity

103. intermediate algebra

Essay.Show all work. A gardener wants to create a rectangular garden with the length of 3x-2y ft. and the width of 3x-3y ft. What is an algebraic expression for the area of the garden.Be sure to multiply this out.Express in the simpliest correct

104. chem

The pH of the nitrite buffer has changed from 3.00 to 2.80 by adding 11.0mL of 12.0M HCL. How many grams of solid sodium Hydroxide would the chemist add to the buffer to change the pH from 3.00 to 3.80?

105. Dynamics Maths

The Giant Ferris Wheel has a radius of 30meters. Assuming that a time t= t_0 , the wheel rotates counterclockwise with a speed of 40m/min, and is slowing at a rate of 15m/min^2 . Find acceleration vector for a person seated in a car at the lowest point of

106. physics

Ok, so I know I already posted another really long question but we have not learned this yet and are expected to do homework on it. Please help me. An ideal monotonic gas is compressed at a constant pressure of 0.9 atm from 14 L to 3.5 L. Note: Atmospheric

107. prealgebra

you play a CD with 11 songs using the shuffle settings. find the probability that the CD player plays song 3 first then song 5.

108. chem 101

A one pound piece of iron was heated to 1000 °C and then quenched in a bucket containing one gallon of water at 25 °C. What was the temperature of the water after the iron and the water came to thermal equilibrium? correct answer is 37C

109. physics

A 1.4-kg copper block is given an initial speed of 2.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. (a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in

110. math

2. A bullet is fired from the ground at an angle of 45o above the horizontal. What initial speed vo must the bullet have in order to hit a point 550 ft high on a tower located 600 ft away (ignoring air resistance)?

111. physics

On a long journey if 10% of the distance is covered at an average speed of 40 km/h and 90% of the distance is covered at an average speed of 90 km/h. What is the average speed for the entire journey? How does this answer change if the percentages relate to

112. physics

A circus a dog is traned to run a stranght path of length 50m/s in the direction AB as shown in the accompanying diagram.the dog starting from rest can attain a maxium speed of 5m/s in 10sec when released from any point along the path AB .the after it

113. to ms.sue

the table below shows the approximate population for the 10 least populated countries in the world.use the data to estimate answers to the problem. vatican city 900 tuvalu 11,000 nauru 13,000 palau 20,000 san marino 28,000 manaco 32,000 liechtenstein

114. physics

A motorcycle stunt rider wants to do a loop-the-loop within a vertical circular track. If the radius of the circular track is 10.0 m, what minimum speed must the motorcyclist maintain to stay on the track? Suppose the radius of the track was doubled. By

115. Physics

Volume of 1200 L of helium at 4000 Pa is heated from 45.0°C to 75.0°C increasing the pressure to 6000 Pa. What is the resulting volume of gas?

116. math

Select the equation that solves this problem: Eight coins (dimes and quarters) are worth 170 cents. How many dimes are there? a. 10d + 25(11 - d) = 170 b. 10d + 25(8 - d) = 170 c. 10d + 5(8 - d) = 60 d. 10d + 5(11 - d) = 60

117. Math

Truck A is carrying 2.5 tons of cargo. Truck B is carrying 4,500 pounds of cargo. Which truck is carrying more? (*Hint: 1 ton=2,000lb)

118. geometry

the ratio of a length on a scale drawing or model to the corresponding length on the real object....is called what?

119. geometry

A cylindrical tank is being constructed to hold 10,000 ft^3 of water. The diameter of the tank is 36ft. What is the minimum height needed for the tank?

120. chemistry

what is the density of carbon dioxide at 26.5 degrees C and 755 mm Hg?

121. Chemistry

The pressure of an unknown gas is measured with a manometer. Instead of mercury the manometer is filled with a liquid (X) whose density is 0.553 g/cc. The pressure is measured as 653 mmX. What is the pressure in mmHg?

122. Physics - Matter

Wind blows around a skyscraper with a speed of 18 m/s outside a large pane of plate glass. What is the difference in air pressure between the inside and outside of the skyscraper? Take the density of air to be 1.3 kg/m3 and assume the air inside the

123. Social Sudies

I can't find the answer to my crossword puzzle! Here it is: A nation's factories, machines, etc. are it's____________capital. I know it's an 8 letter word, but that's all!

124. SS7R - Bill of Rights Project

Why does everyone need to have a lawyer? What are the benefits?? I want to include this in my paragraph for the 6th amendment. Please make sure itâ€™s on a 7th grade regentâ€™s level. 6th Amendment The Sixth Amendment (Amendment VI) to the United

125. Math

a rectangle of integer dimensions is filed with 1x1 tiles. Each tile that touches the perimeter is colored red, while all the "interior" tiles are left white. Let R be the number of red tiles and W the number of whites tiles find R and W for a 3x10

126. physics

Devise a method for measuring the coefficient of friction between two surfaces using an inclined plane

127. Chemistry help!!!

The class will react 50.00 mL samples of .200 mol/L potassium phosphate with an excess of 0.120 mol/L lead II nitrate solution. what is the minimum volume of lead II nitrate solution required? What volume of lead II nitrate solution should the instructor

128. physics

A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C−1). At room temperature (20.0°C), the frames have circular lens holes 2.27 cm in radius. To what temperature must the frames be heated if lenses 2.28

129. Physics

A welding tank has a gauge pressure of 2000psi at 40.0°F. What is the new gauge pressure if the temperature rises to 100°F?

130. Math

ok so the point are A(3,0) and B(-4,6) and the question asks : the images of points A and B after a reflection in the line y=x. what im trying to ask is what axis does it go over the y or x axis?

131. Microeconomics

What is the definiton of marginal proficiency consumer?

132. Chemistry

The triation of 50.00 mL of 0.025 00 M MES with 0.100 0 M NaOH. MES is a weak acid with pKa=6.27. Compute Ve, first. Show what happens at the four stages of the titration: Va = 0,2,5,10,10.1,11,12, and 12.2 mL. I NEED HELP!!!!

133. to ms.sue

can you give me an example of an invitation . i need to make one for homework. For: Date: Time: Place: description: RSVP: I don't know where to put my name!

134. Chemistry

How many moles of ammonium sulfate were released in 25.3 kg?

135. Phys

Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.

136. intermediate algebra

short answer. fin the following quotient.x^2-36/x+6

137. calculus

find the absolute minimum value on (0,infinity)...f(x)= x-(1/x)+(2/x^3).. The example given is x-(1/x)+(10/x^3) which is F(sqrt5)=(6/sqrt5)

138. Algebra

9X+y=2 -4X-y=17

who was the frist dutch priest in eurpoe

140. to ms.sue

what do i write on the RSVP. my teacher said put my phone number there.

141. English

Would this be a good start to a short story? And what do you think i should say next?? This is for two things, my English class, and my blog. Annabelle is a bright, smart and outgoing young twelve year old. Clifford is a easy going, adventurous eight year

142. physics

Consider 3 liters of an ideal (monatomic) gas at a pressure of 34 atm and a temperature of 356K. Call this state of the system A. Using the ideal gas law, calculate the number of moles of gas present in the system. 3.49 The temperature of the system is

143. English

I still have to check a few other sentences on the same subject. Thank you very much in advance,Writeacher. In particular sentences 4-5-6. 1) If I work at the passion, then it is the job itself that motivates me. 2) I will take up working tomorrow. (is

144. geometry

What is the total surface area of a regular square pyramid with a base side length of 18cm and a height of 12cm?

145. chem

An experimental alloy contained by copper and tantalum. 3.7950 g of the alloy was dissolved and analyzed gravimetrically. The copper was precipitated and weighed as CuO, a mass of 0.1805 g was obtained. Calculate the %w/w Cu in the alloy. [Answer in 2

146. chemistry

which are ionic compounds? SO2 PCl3 NaBr PbO AlF3

147. calculus

2. A bullet is fired from the ground at an angle of 45o above the horizontal. What initial speed vo must the bullet have in order to hit a point 550 ft high on a tower located 600 ft away (ignoring air resistance)?

148. Chemistry

50.00 mL samples of 0.200 mol/L potassium phosphate with an excess of 0.120 mol/L lead II nitrate solution. what is the minimum volume of lead II nitrate solution required? What volume of lead II nitrate solution should the instructor tell the students to

149. Math

A new school has opened with fewer than 500 students. 1/3 of the students is a whole number. So are 1/4, 1/5 and 1/7 of the students. How many students go to this school?

150. Accounting

Our company bought the fully-depreciated personal car of our General manager. What is the proper and correct journal entry?

151. Math

Find a counterexample to show that the conjecture is false. Any number that is divisible by 5 is also divisible by 3. A. 45 B. 60 C. 30 D. 25

152. math

Please solve and explain how to solve the compound inequality: 4 < 4a +3 < 18

153. Albebra I

bayside insurance offers 2 plans: plan A: pay the 1st \$60 + 0.30 of the rest of the bills; plan b = pay 1st \$140 + 0.25 of the rest of thebills. For what amount of medical bills will plan B save money? Assume there are over \$140 in bills

154. tax

If the proceeds of a pension plan are being distributed and the original beneficiary dies, the: A. person who inherits the plan assets can elect to be treated as the original beneficiary if that person is the spouse of the original beneficiary. B. person

155. physics

You want to design a curve, with a radius of curvature of 35.0 m, so that a car can turn at a velocity of 15 m/s on it without depending on friction. At what angle must the road be banked?

156. biology

What must the systolic blood pressure be valued at for adequate mean arterial pressure if the diastolic pressure is 75? (Assume resting conditions) A. at least 90 B. at least 95 C. at least 100 D. at least 105 E. at least 110 F. at least 115 G. at least

157. chemistry

26 g of methane CH4 has a pressure of 450 kPa at 250 degrees celcius find the volume occupied by the gas

158. Math

If theta is a standard position angle and cot theta=1.85, in which quadrant(s) could theta lie?

160. geometry

Find the height of a rectangular prism with a surface area of 286 inches squared, and a base measuring 63 inches

161. Life Orientation

Describe the life style disease Lack of Physical Fitness and Proper Nutrition in the Adolescent and explain 5 or more factors that contribute to the disease.

162. to ms.sue

i need help on #2 and #4

163. to ms.sue

why does it have to be half of 315,00. i don't get #4 and #2. i still have a lot of homework

164. physics

a ball bounces directly upon another ball at rest and it self brought to rest by the impact.if half of initial kinetic energy is destroyed in the collision ,the co-efficient of restitution is?

165. crjs101

how to present the processing requirements and the mandated pretrial measures required by law.

166. to ms.sue

now i get it .later ill post you back to check the answer,okay?

167. Math - Trig

A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? I just can't figure it out.

168. phy

Some air at 275 kPa absolute pressure occupies 50.0m^3. Find its absolute pressure if its volume is doubled at constant temperature.

169. Physics

Volume of 1200 L of helium at 4000 Pa is heated from 45.0°C to 75.0°C increasing the pressure to 6000 Pa. What is the resulting volume of gas?

170. geometry

A cone with a diameter of 7.2 meters and slant height of 8.8 meters is being filled with water at a rate of 2.5 m^3 per minute. How many minutes will it take to fill the cone?

171. prealgebra

you play a CD using the shuffle settings are the selections of the first two songs are played independent or dependent events???

172. math

I have a surface area? my base is 18m, height is 4m and wisdth is 14m - do not understand the equation given by teacher of: top bottom, both sides and front and back to get answer - this does not make sense to me - please explain

173. ALGEBRA

text((a) ) (4 L)/(5) = 3 L = Incorrect: Your answer is incorrect. text((b) ) 3 = (4 M)/4 + 11

174. math

if 8 counters are 6/12, then what is the one?

175. chem 101

Determine the heat of combustion of ethyl alcohol (C2H6O). the right answer is -1238.43 kj/mol. Help with process thank you

176. math

when jason arranges his toy soldiers in rows of 6, he has left 1.when he arrahges them in rows of 8, he has 3 left over. when he arrenges in rowsof 10 then 5 left over. what is the smallest possible number of toy soldiers that jason plays with/

177. English - ms. sue

ms. sue what i name this process analysis essay? i not want to say how to stay healthy in winter.

178. English

Hello. I will really appreciate some help. 1)Which preposition is correct in the context "to work at/in a company"? 2)Is it "a vacancy at" or "in our company"? 2)Which is the correct word order in the following word-group: "British TV dance show" or

179. english

I need a title for an essay I am writing on Oliver sacks. Any suggestions?

180. SS7R - Billf of Rights - 7th Amendment

The Seventh Amendment to the United States Constitution, which was ratified as part of the Bill of Rights, codifies the right to a jury trial in certain civil cases. We have the right to trial by jury for civil trials. What do the 7th amendment means and

181. math

Select the equation that solves this problem: Eight coins (dimes and nickels) are worth 60 cents. How many dimes are there? a. 10d + 25(11 - d) = 170 b. 10d + 25(8 - d) = 170 c. 10d + 5(8 - d) = 60 d. 10d + 5(11 - d) = 60

182. SCIENCE

describe the preparation of 100mls of 1,0M from concentrated HCL?

183. Chemistry

The pH of vinegar is 2.40. Calculate the concentration of hydronium ions and hyrdroxide ions in vinegar.

184. Maths

how would you factorise this: (p+q)^2+5(p+q) to get this answer:(p+q)(p+q+5)

185. Chemistry

The pH of vinegar is 2.40. Calculate the concentration of hydronium ions and hyrdroxide ions in vinegar.

186. physics

An object of mass 200.0kg is moving from rest under the influence of net force 1.0Kn.Find the acceleration of the object and work done within 20.0s.What is the velocity of the object at the end of 20.0s interval of time? Calculate the kinetic energy

187. math

Show the formula correctly being solved for the variable c. W = (c + m +y)/z

188. English

Writeacher, here are some sentences I'd like you to revise. Thank you. 1) The teacher let the students off with a warning (let off the students is a mistake?) 2) I'm looking forward to my sister's letter. (I'm waiting impatiently for my sister's letter;

189. reasearch paper

what activities are in the pre writing stage of the writing process?

190. English

I left out the following sentences. Thank you very much, Writeacher. 1) I think everybody would work at a passion but many times (mistake) this is often not possible. 2) If I worked, I would work at a job because I'll need (I need) to put aside money for

191. English

I left out two sentences. Thank you very much. 1) My father took a day off to bring (better take/drive) me to the beach. 2) She is looking through the data on her monitor.

192. SS7R - Bill of Rights Project Check

Please check my project to see if it's good. LET ME KNOW IF THERE ANY GRAMMERS, OR ERRORS!!! I hope you love my project I had been working hard on this. BTW - For those teachers who don't know about my project ask Ms. Sue or check on my name to see my

193. Physics

Given that acceleration due to gravity at the surface of the earth is 9.8N/kg, estimate a value for the mass of the earth. G=6.7x10^-11

194. math

A crate full of sugar cubes has a volume of 3 cubic feet. The volume of each sugar cube is 0.5 cubic inch. How many sugar cubes are there in the crate?

195. biology

Predict the expected change to blood flow should norepi act on arteries of the abdominal cavity? A. Blood flow increases B. Blood flow decreases C. Blood flow stays the same but pressure increases D. Blood flow stays the same but speed decreases E. None of

196. math

james said that it would cost him \$6.55 per day to ski each of the five days if he bought a weekday pass. Why is his answer incorrect? type of ticket cost days used weekday \$327.50 mon-fri

197. Algebra 2

What is the first term of a geometric series with a summation of 800, 4 terms and a common ratio of 3?

198. physics

Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.

199. artist

did Copley like the rich

200. Chemistry

To produce 3.00 L of a 1.9 M solution of NaOH, how many grams of NaOH must be dissolved?

201. statistics

For a sample size of 10 from a population whose standard deviation is not known, which type of probability distribution is used to help calculate a confidence interval for the mean?

202. MATH

a basketball player strikes out 3 times for every 2 hits he gets. If the player strikes out 15 times, how many hits does he get? If the player gets 46 hits, how many times does he strike out?

the answer isantigua and barbuda, dominica, and palau. they add up to 157000 and i did by hand.

204. English

i writing a process analysis essay on topic staying healthy in winter and i making it a directional type of process analysis essay because it be easy to direct people on how to do things. the only points i get for staying healthy in winter be wearing warm

205. math

A stack of 24 workbooks weighs 14 2/5 lb. How much does each workbook weigh?

1. What are two ways earn money? 2. What are six jobs at a newspaper? 3. What is the purpose of the Associated Press and the United Press International?

207. mental maths

what is 15 degrees lower than 7c

208. to ms.sue

thank u so much?

209. ALGEBRA

If possible, completely factor the expression. (If the polynomial is not factorable using integers, enter PRIME.) x^2+17 x+70

b/3 + 6=82

211. ALGEBRA

If possible, completely factor the expression. (If the polynomial is not factorable using integers, enter PRIME.) x^2-5 x-6

212. ALGEBRA

6y + 11x = -9 (a) Solve the equation for y. (Do not use mixed numbers in your answer.) y =

213. physics

Write down a half-reaction that explains the change that occurs on the surface of the copper spoon during electrolysis.

214. ALGEBRA

Let x = 1, y = 3. Find the value of the given capital letter. N = x**2 + 2 xy + y**2 + 3

215. World History

During the Columbian Exchange what diseases were brought from the new world to Europe?

216. Econonics

people join tennis clubs for a fixed free per year, which entitles them to play as much as they want without charge. because people who pay these feeds play more tennis than others( who can use free public courts), this means sucnk cost matter for

217. ALGEBRA

Solve the equation. 2(W + 4) - 3(W + 2) = 0

218. Culture Diversity

Throughout most of U.S. history in most locations, what race has been the majority?

219. ALGEBRA

x2 - 5x + 5 = 0

220. chem 101

How much heat is required to raise the temperature of exactly one liter of water fro m 60 °F to 180 °F? answer: 279 kj/mol

221. ALGEBRA

Factor the expression by using areas. x^2+2 x-8

222. ALGEBRA

Solve the inequality. (Enter INFINITY for infinity and -INFINITY for -infinity as needed.) 3

223. ALGEBRA

Solve the inequality. (Enter INFINITY for infinity and -INFINITY for -infinity as needed.) 9-x>=4 x + 34

224. English

I still have a few sentences to check. Thank you very much, Writeacher. 1) I would worl at a passion (my passion), because even if I know it is difficult to take off, I think that the job itself can motivate me. In fact, I'd prefer to have a job in which I

225. physics

What are two general types of energy that can be used to classify many forms of energy? Can someone help

226. Social Studies

A nation's factories, machines, etc. are it's_______capital. _ _ y _ _ _ A _

227. math

14z^2 + 6z + 8 ————————————— = ? 2

228. math

can you show me step by step how to factor 15x^2-14x-8

229. math

Which of the following equations represents the equation for the line that is parallel to the given line and passes through the given point? y= 1/5 x - 10; (15, -16) A. y = -5x +19 B. y = 1/5x + 91/5 C. y = 1/5 x - 19 D. y = 5x - 19 I do know that to be

230. physics

Where must an object be placed to have a magniﬁcation of 3.74 in front of a converging lens of focal length 14.1 cm?

231. political

In the United Kingdom, the Queen represents which role? 1. Head of Government 2. Chief of State. which one is right? please help.

232. math

what is the percent of 12 and 15

233. health

I'm doing a health project on family. My question is how does your dad support you? I need ideas thank you

234. World History

For a project I'm doing for world history, I have to include 2 "VIP's" for Winston Churchill. Does anyone know of a person who contributed to Churchill's fame or someone who was important to Churchill that I could research to include as one of my VIP's?

235. English

Hello. Please help me with a question. Will you use an article in the context: "his task was to monitor (the?) information on the trial in the press"? Thank you very much.

236. math

Wendy found a rule for a table. The rule she made is y = x + 2.She says that means every y-value will be even.Is she correct?

237. 1980's la

Im writing a paper on the 1980 's but having trouble with coming up with 1 word to describe that decade? Can u help. ??

238. Algebra 2

Evaluate the expression. 10x^3y^-5z^-2 if x=3, y=2, z=5

What is the scene illustration-reflective plot

240. to ms.sue

why divide it by 69,000

241. math

Observe the first three sets of numbers to determine the missing value in the fourth set. Are you sure you know the value? {-5, 23, 12, 16} {1, 39, -14, 52} {17, 47, 42, -12} {25, ?, 11, 31}

242. health

Children and adolescents are considered to be reflected in which age group? A. 6-17 years old B. 3-17 years old C. 5-17 years old D. 10-17 years old

243. Speech

I am going to be giving a demonstration speech that has to be between 3-10min, but i am not sure what to do it on. I was showing how to make an item/ product that you normally buy from the store but can easily make at home but am not sure. It either has to

244. geometry

Given that AB is a tangent of the circle with the center at X, AB = 12, and XD = 2.5, which is the length of DB?

245. Physics

Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.

246. Physics

Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.

247. Physics

Some air at 275 kPa absolute pressure occupies 50.0m^3. Find its absolute pressure if its volume is doubled at constant temperature.

248. Intermediate Micro economics

A firm with a kinked demand curve experiences an increase fixed costs. Explain how the firm's price, output and profit change.