# Questions Asked onOctober 14, 2010

1. ## Physics

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.24 and the push imparts an initial speed of 3.8 m/s?

2. ## Physics

An elevator in a tall building is allowed to reach a maximum speed of 3.3 m/s going down. What must the tension be in the cable to stop this elevator over a distance of 3.4 m if the elevator has a mass of 1330 kg including occupants?

3. ## CHEM- solution/freezing piont

a solution of sulfur (2.560g) in naphthalene (100g) freezes 0.68K lower the freezing point of pure naphthalene (353.10K). for naphthalene, Kf= 6.8K kg mol. calculatem the molecular formula of the sulfur dissolved in the naphthalene?

4. ## CHEMISTRY

brass is a subtitutional alloy consisting of a solution of copper and zinc. a particulae sample of red brass consisting of 80% copper and 20% zinc by mass has a density of 8750kg/m^3. a. what is the molality of zinc in the solid solution and B. what is the

this is a algebra pizzazz question what happened to the glass blower who inhaled?

6. ## CHEMISTRY- vant hoff

a 0.100m k2so4 solution has a freezing point of -0.43 degrees. what is the van hoff factors for this solution? kf=1.86degree/m? 0.77 3.0 1.0 2.3 i have used the equation dT=iKfm and get -2.3?

7. ## chemistry

How many silver atoms are there in 3.88g of silver

8. ## economics

The following information applies to the market for a particular items in the absence of a unit excise tax: Price(\$ per unit) Quantity Supplied Quantity Demanded 4 50 200 5 75 175 6 100 150 7 125 125 8 150 100 9 175 75 According to the information above,

my ten digit is double my one digit. i am less than 70 and greater than 60. what number am i

10. ## physic

Search: The barrels of the 16 in guns (bore diameter = 16 in. = 41 cm) on the World War II battleship U.S.S. Massachusetts were each 15 m long. The shells each had a mass of 1050 kg and were fired with sufficient explosive force to provide them with a

11. ## chemistry

Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe how you would prepare this solution. Include any calculations that you would perform.

12. ## trig

wha tis the exact value of sin 9pi/4

13. ## Algebra

a rectangle with perimeter of 198 cm is divided into 5 congruent rectangles. What is the perimeter of one of the five congruent rectangles? i got the expression 5w + 4L = 198 the rectangle has two smaller rectangle on the top facing horizontally on the top

14. ## Geography/History

How do command economies and market economies affect a worker's life?

15. ## CHEMISTRY

calculate the number of moles of solute present in 124.0g of a solution that is 6.45% glucose by mass.

16. ## Chemistry

What is the mass, in grams, of each of the following? 44.3 mol Xe

17. ## Chemistry

What mass of electrons would be required to just neutralize the charge of 3.9 grams of protons?

18. ## Chemistry

A sample of gas collected over water at 42 C occupies a volume of one liter. The wet gas has a pressure of 0.986 atm. The gas is dried, and the dry gas occupies 1.04 L with a pressure of 1.00 atm at 90 C. Using this information, calculate the vapor

19. ## physics

a skydiver who weighs 500N reaches terminal velocity of 90 km/h. the air resistence on the diver is then... a)90N b)250N c)410N d)500N e)none of these EXPLAIN PLEASE :)

20. ## physics

In Rutherford's famous scattering experiments that led to the planetary model of the atom, alpha particles (having charges of +2e and masses of 6.64 10-27 kg) were fired toward a gold nucleus with charge +79e. An alpha particle, initially very far from the

21. ## physics

In Fig. 8-49, a block slides down an incline. As it moves from point A to point B, which are 3.0 m apart, force acts on the block, with magnitude 3.8 N and directed down the incline. The magnitude of the frictional force acting on the block is 5.3 N. If

22. ## Intro to Science

A rock with a Weight of 156.8 newtons falls 5 meters. What potential energy does it have left before the end of its fall?

24. ## Physics

A man with a mass of 65 kg stands up in a 64-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How

25. ## Chemistry

An excess of aqueous AgNO3 reacts with 24.5 mL of 5 M K2CrO4(aq) to form a precip- itate. What is the precipitate? 1. AgNO3 2. Ag2CrO4 3. KNO3 4. K2CrO4

A fish is reeled in at a rate of 3.2 feet per second from a point 10 feet above the water (see figure). At what rate is the angle between the line and the water changing when there is a total of 25 feet of line out? (Round your answer to three decimal

27. ## Physics

A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s. What is the average power of the engine?

28. ## calculus

Find the linearization of the function below at x = π/3.? y=sin(x)/x Your answer should be a linear function of x where the coefficients are accurate to at least two decimal places. You can enter π in your answer as "pi" (without the quotes). I am not

29. ## physic

Eight books, each 8.5 cm thick with mass 1.3 kg, lie flat on a table.How much work is required to stack them one on top of another?

30. ## calculus

Find the linearization of the function below at x = π/3.? y=sin(x)/x Your answer should be a linear function of x where the coefficients are accurate to at least two decimal places. You can enter π in your answer as "pi" (without the quotes). I am not

31. ## calculus

The half-life of Radium-223 is 11.43 days. If a sample has a mass of 900 mg, find the mass (in mg) that remains after 5 days

32. ## calculus

Determine the rate at which the surface area is changing with respect to time at t=2 min, assuming that r = 3 at t = 0 Assume that the radius r of a sphere is expanding at a rate of 14 in / min. Its surface area is 4(pi)r^2 Ds/dt= 4pi2rdr/dt i got

33. ## Physics 111

A 66 kg diver steps off a 13 m tower and drops from rest straight down into the water. If he comes to rest 5.0 m beneath the surface, determine the average resistance force exerted on him by the water.

Underline each compound subject once and each compound predicate twice. Then write compound subject or compound predicate. 1. swimming and softball are two sports_ in the Olympic Games.= (COMPOUND SUBJECT) 2. The swimmer's_ skill and speed made him a

35. ## Check a chemistry answer

So I think I have done this problem right, I was just wondering if anyone would check over it for me. What mass (in grams) of P2O5 contains 1.20 x 1023 atoms of phosphorus? 1.20E23 atoms of P x (1 mol/ 6.022E23 atoms) x (5 mol O/ 2 mol P) x (1 mol P2O5/ 5

36. ## Physics

An empty elevator of mass 2.7x10^2kg is pulled upward by a cable at an acceleration of 1.2m/s. What is the tension in the cable? What would the tension be if the elevator were accelerating downward at 1.2m/s^2?

37. ## chemistry

A backpacker carries 2.1 of white gas as fuel for her stove.How many pounds does the fuel add to her load? Assume the density of white gas to be 0.79 . Express your answer using two significant figures

38. ## calculus

please help if you can At a sand & gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. The diameter of the base of the cone is approximately three times the altitude. At what rate is the height of the

39. ## Chemistry

calculate the theoretical yield (in grams) of the solid product, assuming that you use 1.0 g FeC2O4×2H2O and that oxygen is the excess reactant. FeC2O4×2H2O (s) + O2(g) ---> FeO(s) + H2O(g) + CO2(g) Its balanced equation is 2FeC2O4×2H2O (s) + O2(g)---->

40. ## calculus

a spotlight on the ground shines on a wall 12 m away. if a man 2m tall walks from the spotlight toward the building at a speed of 1.6m/s, how fast is the length of his shadow on the building decreasing when he is 4m from the building?

41. ## geometry

The side lengths of two different cubes are 36 cm and 45 cm. What is the ratio of the volume of the smaller to the volume of the larger (in simplest form)? Note: These cubes are not drawn to scale.

42. ## math

Suppose from a population of 50 bank accounts we want to take a random sample of three accounts in order to learn about the population. How many different random samples of three accounts are possible.

43. ## algebra

An executive invests \$25,000, some at 8% and some at 4% annual interest. If he receives an annual return of \$1600, how much is invested at each rate?

44. ## math

2 trains going opposite directions leave at the same time. Train b is 10mph faster than train a. in 8 hours the trains are 960 miles apart. find the speed of each

45. ## physics

A 0.25 mF capacitor is connected to a 9.0 V battery. What is the charge on the capacitor?

46. ## math

What is \$1500 with 7% of tax?

47. ## Nutrition

A liter of perspiration lost by the body represents _____ kcalories?

48. ## Chemistry

Hydrogen and oxygen gas combine explosively to produce water. Write a balanced chemical equation for this process. If 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced?

49. ## Chemisrty

Calculate the work done when 60.0 g of tin dissolves in excess acid at 1.00 atm and 20°C. Assume ideal gas behavior.

50. ## Physics

A skier skiing downhill reaches the bottom of a hollow with a velocity of 20.0m/s, and then coasts up a hill with a 12 degree slope. If the coefficient of kinetic friction is 0.11, how far up the slope will she travel before she stops?

51. ## calculus

a ball is thrown directly upward with a velocity of 40 feet/seconds. its height in feet after t seconds is given by h(t)equals 40t-16t squared

52. ## Math

find the greatest four-digit number that has exactly three positive factors.

53. ## chemistry

What is the effect of the following on the separation of the mixture(hexane and toluene)? a. A soluble, nonvolatile impurity b. a decrease in barometric pressure c. an increase in barometric pressure d. rapid heating rate

54. ## Chemistry

I know nothing about chemistry, but am wondering if someone could help me with these. 1) Balance this redox reaction using the oxidation-number method. Zn + O2 + HCl ® ZnCl2 + H2O 2) Balance this redox reaction using the half-reaction method. (basic

55. ## physics

What is the average force exerted by a shot-puter on a 6.1-kg shot if the shot is moved through a distance of 2.8 m and is released with a speed of 12 m/s?

56. ## algebra 2

Rosalyn works no more than 16 hours a week during the school year. she is paid \$10 and hour for tutoring geometry students and \$7 an hour for delivering pizzas for Pizza King. She wants to spend at least 6 hours but no more than 8 hours a week tutoring.

57. ## phy 111

A daredevil on a motorcycle leaves the end of a ramp with a speed of 34.5 m/s as in the figure below. If his speed is 32.1 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.

58. ## PHYSICS

Leg traction is applied to a patient's leg as shown in the figure below. If the physician has requested a 33 N force to be applied to the leg, and the angle is θ = 60 degrees. what mass m must be used for the object hanging from the massless cable? Image

59. ## Math

Suppose a cost-benefit model is given: y= 5x/105-x Where y is the cost in thousands of dollars of removing x percentage of a certain pollutant. Find the cost of removing each percent of pollutants: 0%, 45%

explain how you can use a hundred chart to subtract 12 from 46

61. ## physics

A large uniform "butcher block" rests on two supports(one support at the left end of the block) and has a weight hanging from its end. The block has a mass of 100 kg and a length of 2 meters. If the hanging weight is 59 newtons, what is the minimum value

62. ## physics

gravity on the surface of the moon is only 1/6 as strong as gravity on earth. what is the weight of a 37 kg object on the earth? The acceleration of gravity is 10m/s answer in units of N

63. ## math

Assume that showing a car is a Bernoulli trial, and each time she shows a car, there is a probability of 0.25 that the customer will buy the car. The saleswoman has a goal of selling at least one car a week. How many cars must she show so that the

64. ## Chemistry

half life of tritium is 12.5 years. how much will remain after 100 years if you started wit 256 grams?

65. ## Physics

What is the centripetal acceleration of the Moon? The period of the Moon's orbit about the Earth is 27.3 days, measured with respect to the fixed stars. The radius of the Moon's orbit is RM = 3.85 · 108 m.

66. ## Persuasive Topic help

For my speech class we need to make a speech on a persuasive topic that will be interesting and fun to hear. It needs to be a topic that no one ever really talks about, or something that no one really knows about. For example pregnancy is something we

67. ## physics

A large uniform "butcher block" rests on two supports(one support at the left end of the block) and has a weight hanging from its end. The block has a mass of 100 kg and a length of 2 meters. If the hanging weight is 59 newtons, what is the minimum value

68. ## Organic Chemistry

2-methyl-2hexanol is reacted with sulfuric acid at around 800C. The two products formed are 2-methyl-1-hexene (19%) and 2-methyl-2-hexene (81%). Show the chemical equation for this reaction. Explain fully why 2-methyl-2-hexene is the major product. Please

69. ## FZN

Your school has contracted with a professional magician to perform. The school has guaranteed an attendance of at least 1000 people and total tickets sales of at least \$4400. The tickets are \$4 for students and \$6 for non students, of which the magician

70. ## Algebra

Three girls paid \$100 each, a total of \$300, to share a Motel Room. Later, the desk clerk realizing she should have only charged \$250, gives the Room Attendant \$50 and asks him to return it to the three girls. Unable to divide the money three ways, he

71. ## physics

Determine the work a hiker must do on a 15.8 kg backpack to carry it up a hill of height h = 13.5 m. The hill is not an even slope but rather an irregular curve as in the figure.Determine also the work done by gravity on the backpack

72. ## calculus

A. find y' by implicit differentiation. B. solve th equation explicitly for y and differentiate to get y' in terms of x. cos (x) + √y = 5

73. ## physics

A hot air balloon decends toward the ground with a velocity of (2.0 m/s)yhat. A champagne bottle is opened to celebrate takeoff, expelling the cork horizontally with a velocity of (6.0 m/s)xhat relative to the balloon. When opened, the bottle is 6.2 m

74. ## Physics!

Baseball player A bunts the ball by hitting it in such a way that it acquires an initial velocity of 1.9 m/s parallel to the ground. Upon contact with the bat, the ball is 1.5 m above the ground. Payer B wishes to duplicate this bunt, in so far as he also

75. ## Physics

A 325 kg boat is sailing 15.0 degrees north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0 degrees north of east at a speed of 4.00 m/s. During this time three forces act on the boat: a 31.0 N force directed 15.0 degrees north of

76. ## math

suppose both pairs of opposite sides of a quadrilateral are parallel. Which angles of the quadrilateral must be supplementary?

77. ## Physics

Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities

78. ## CHEMISTRY

Dr BOB can you explain this to me. I am so struggling with this subject. during a typical breathing cycle the CO2 concentration in the expired air rises to a peak of 4.6% by volume. Calculate the partial pressure of the CO2 at this point, assuming 1 bar of

79. ## physics

Two parallel wires in a horizontal plane carry currents I1 and I2 to the right. The wires each have a length L and are separated by a distance d. calculate the following where: I1 = 10A, I2 = 20A, d = 5mm, and L = 2m. What are the magnitude and direction

80. ## Physics

A bullet with a mass of 55 grams moving with a speed of 100 m/s slams into and wedges in a 1.9 kilogram block of wood supported by a string initially at rest. Which one, conservation of energy or conservation of momentum, can be applied to this situation?

81. ## Math

A math book is .78 centimeters thick. What is the width of 21 math books on a shelf?

82. ## Logic - English-

A dog is tied to a leash 15 feet long. The dog wants to get to a bone that is 20 feet away. How will he get to the bone?

83. ## Physics/Calculus

At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.8 m, the bottom of the wheel is 1.8 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions

84. ## algebra

find the value of 7n when n is 7565

85. ## calculus

"How fast is the area of the triangle formed by the ladder, the house, and the ground when the base of the ladder is 7 ft. away from the wall? Given h=24ft. dh/dt=-7/12ft. per sec. b=7 (base) db/dt=2ft. per sec. d/dt[A=1/2bh] How would you derive this with

86. ## math

in a triangle,the largest angle is 29 degrees more than the smallest.The third angle is 13 degrees larger than the smallest. What is the smallest angle in the triangle?What kind of triangle is it? and show work please.

87. ## Physics

A centrifuge in a medical laboratory rotates at an angular speed of 3500 rpm (revolutions per minute). When switched off, it rotates 70.0 times before coming to rest. Find the constant angular acceleration of the centrifuge. (Assume the initial direction

write a six-digit number in which the digit 4 has the value of 40,000

89. ## Math

I have a series of questions that I did. They lead up to the last question I can't solve. Could you check my math and help me with the last question? Thanks! a) Let a be the point (2,3). Compute the distance from Origin 0 to A answer: a^2 + b^2 = c^2 3^2 +

90. ## Physics 111

While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 62 kg person develops a power of 67 W during a race, how fast is the person running? (Assume a running step is 1.5 m long.)

91. ## Chemistry

Which compound on the left, when dissolved in water, does not produce the corresponding compound(s) on the right? 1. N2O5 -> HNO3 2. CaO -> Ca(OH)2 3. NaH -> NaOH + H2 4. SO2 -> H2SO4 5. Cl2O7 -> HClO4

92. ## english

Identify the pronouns in each sentance. Then decide if its nominative (N), objective (O), or possesive (P). write your example accourding to the following example Q: My favorite actor is better than yours. A:My: P, yours; P

93. ## physics

Two archers shoot arrows in the same direction from the same place with the same initial speeds, but at different angles. One shoots at 45 degres above the horizontal, while the other shoots at 60 degrees. If the arrow launched at 45 degrees lands 225 from

94. ## statistics

what percentage of students studied between 30 and 40 hours? Range 10-50, Mean- 35, standard deviation-5.

95. ## physics

during 4.0 min a 5.0 a current is set up in a wire,how many coulombs and the electrons pass through any cross section across the wire?

96. ## Math

The question is: Fr what value(s) of k will the function f(x)=(kx^2)-4x+k have no zeroes. So for that, the discriminant would be less than 0. 0>D 0>((-4)^2)-4(k)(k) 0>16-(4k^2) 4k^2>16 k^2>4 k>+2/-2 So I know that I'm supposed to graph it with D as one

97. ## College Algebra and Trig

a rancher has 12,000 feet of fence to enclose 5 adjacent pens. determine the outer rectangular dimensions that result the maximum enclosed area.

98. ## Physics

At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally drops his stuffed buddy. The wheel has a diameter of 14.6 m, the bottom of the wheel is 1.1 m above the ground and its rim is

99. ## calculus

Find the linearization of the function below at x = π/3.? y=sin(x)/x Your answer should be a linear function of x where the coefficients are accurate to at least two decimal places. You can enter π in your answer as "pi" (without the quotes). I am not

100. ## physics

A girl makes a jump in the long jump with an initial velocity of 12 m/s. She leaves the ground at 20 degrees above the horizontal. How far is her jump?

101. ## physics

A girl makes a jump in the long jump with an initial velocity of 12 m/s. She leaves the ground at 20 degrees above the horizontal. How far is her jump?

102. ## calculus

Find dy/dx by implicit differentiation. sin x = x (1 + tan y)

103. ## math

Metal discs for pet collars have a diameter of 4cm. Each disc is 0.1cm thick. How many discs can be made from 1000cm3 of metal?

104. ## physical science

1000 millimeters are in a meter. How many millimeters do you think are in 2 liters?

105. ## math

What is the cube root of x to the 7th power?

106. ## Physics

space shuttle travels at about 7.4581x10^3 m/s. An astronaut takes about 1.5933x10^2 ms to blink an eye. How far does the space shuttle travel in that time, expressed to 4 significant figures?

What is the meaning of seperation of powers

108. ## English

What does this mean? Dawn would creep across the Swedish farmland and coast; then it would wash little Denmark with light and move across the North Sea to wake Norway.

109. ## calculus

a ball is thrown directly upward with a velocity of 40 feet/seconds. its height in feet after t seconds is given by h(t)equals 40t-16t squared

110. ## Chemistry

you are given the equation S2O3 + 2H --> S + SO2 + H2O you mix 25 ml of HCl with a concentration of 2 mol/L with 5 mL of Na2S2O3 with a concentration of 0.3 mol/L. what is the concentration of S2O3 and H?

111. ## intro to calc

if the pool is being filled at a rate of .8ft^3/min, how fast is the water rising when the depth at the deepest point is 5ft?

112. ## General chemistry

What mass of electrons would be required to just neutralize the charge of 2.7 of protons?

113. ## social studies

what is the human-environment interaction in arctic? movements in the Arctic? human habitats in the Arctic? civilizations & ppl influenced?

114. ## Organic Chemistry Lab

For the "ISOLATION OF CHLOROPHYLL AND CAROTENOID PIGMENTS FROM SPINACH" we have to do a purification scheme and I was wondering what dissolves in hexane out of pigments, water, sugars,and starch. I know that water doesn't, but the pigments does, but what

The ultimate goal of all the explorations launched by the Europeans from the fourteenth century onward was

Are these correct? lim x->0 (x)/(sqrt(x^2+4) - 2) I get 4/0= +/- infinity so lim x->0+ = + infinity? and lim x->0- = + infinity? lim x->1 (x^2 - 5x + 6)/(x^2 - 3x + 2) I get 2/0, so lim x-> 1+ = - infinity? and lim x->1- = + infinity? lim h->0

117. ## Child development part 2

15. Observation reports need to make a clear distinction between the description of behaviors and the ____ drawn from the observation? 18. How can a caregiver best help a school-aged who is unsure of assignment instructions given by the teachers?

118. ## English

Can you please check the following sentences? I really hope you can have a look at them. 1) The King of Sicily gave a jeweller some gold and asked him to make a crown from it. In order to make sere the jeweller used only gold (?), the king went to ask

119. ## math problem solving

mr. mancho, my great dane, ate 125 hot dogs over a five-day period. each day he ate seven more hot dogs than on the previous day. how many hot dogs did he eat on the first day

120. ## math

Train leaves a stationa traveling at 60 miles per hour. Eight hours later train B leaves the same station traveling in the same direction at 80 miles per hour. How long does it atke for train B to catch up to train A.?

121. ## arithmetic

Two arithmetic progression have thd same first and last terms.the first arithmetic progression has 21 terms with a common difference of 9.How many terms has the other arithmetic progression if its common difference is 4?working and answer.thans

122. ## calculus reposted

Given the graph of f(x) find the graph of 2 f( -3x - 2) - 4 Is this correct??? First, compress the graph horizontally by 3. Second, reflect the graph over the y-axis. Third, shift the graph 2 units to the right. Fourth, stretch the graph vertically by 2.

123. ## english

edit the following sentence with pronoun case:"the shower of sinking bricks caused he and his diving partner to race away from the collapsing seawell."

124. ## physics

how do i convert my weight to Newtons?

125. ## Physics- Newton's 1st and 2nd Law

Please help me :( Briefly explain the following scenario's using Newton's first law. a) Trevor wants to tow Kevin's car with his truck. He attached a small tow rope between the vehicles and leaves the rope slack (loose). Trevor quickly accelerates forwards

126. ## EDU310

What credential must you possess to obtain a teaching certificate in Florida:

127. ## math

A group of friends took a bus trip. Each traveler gave the bus driver a tip using the same nine coins. The total tip was \$8.41. How many nickels did the driver receive?

128. ## physics

a ball rolls off an incline at an angle of 30 below the horizontal at a velocity of 22m/s. how far from the base will the ball hit the floor if it lands in 3s?

129. ## Chemistry

Congratulations! You have discovered a new element called Bhauzium (Bz). The average atomic mass of Bz was found to be 348.72 amu and its atomic number is 123. a) if the atomic masses of three isotopes of Bhsuzium are 342.92 amu, 356.43 amu (6.52%), and

130. ## math

A student's scores on four math tests were 89,92,95, and 85. What will he need to make on the 5th test to have an average of 93? is this possible? HELP!

131. ## Physics

A track athlete runs exactly one complete lap of the track, 400 m circumfrence, in 4.02x10^1 seconds. What is the velocity of the athlete , to two significant figures, if they are assumed to run with a constant velocity for the entire time?

132. ## math

Brenda's dog is 5 times as long as Hugh's dog. Together the dogs are 48 inches long.How many inches long is Hugh's dog?

133. ## math

express 55 minutes as a fraction of 1 1/3

134. ## College Physics

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 96.5 kg. The mass of the rock is 0.250 kg. Initially the wagon is rolling forward at a

135. ## geometry

Find the volume of a barber's pole having the shape of a right circular cylinder of radius 5 in. and height 29 in. topped by a sphere of the same radius. Round to the nearest tenth, if necessary.

136. ## Substitution and Income Effects

Managers are very interested in how a consumer makes a choice among alternatives. In this exercise, we ask you to consider the amount of money you spend purchasing gasoline to operate your automobile for a month and any alternatives available to you

137. ## PHYSICS

An object of mass M = 1,284 g is pushed at a constant speed up a frictionless inclined surface which forms an angle θ = 50 degrees with the horizontal. What is the magnitude of the force that is exerted by the inclined surface on the object? (I'm using

138. ## English

1. I have read the book the Secret. 2. I have read the book the Secret before. 3. I have read the book the Secret and know the content about it. (What is the meaning of #1? Does #1 mean #2 or #3?)

139. ## Math

what is the total width of 21 math books that are .78 centimeters thick

140. ## English

Can you please check the grammar in the following sentences? Thank you. 1) I have football training (or I go to football practice?) twice a week. We play a match against another local team on Saturdays. 2) Mickey is late for his dance class. Mrs Winter

141. ## English

I'm writing an essay on the book Number the stars by louis lowry. My three body paragraphs are going to include imagery, figurative language, and symbol. What is an example of a topic sentence for my paragraph about imagery.

142. ## math

express 55 minutes as a fraction of 1 1/3 hours

143. ## algebra

Althea is 5 years older than Leah, and Leah is 4 years older than Jessica. The sum of thier ages is 34. How old is Althea?

144. ## math

There are 16 tennis players in a single elimination tournament. How many tennis mathches will be played during the tournment?will it be 8 or 2 if not..what?

145. ## Psy 340

What are some examples of theories concerning sexual orientation, hormones, and the brain? Which one do you feel is most accurate? Why?

146. ## College Calculus 1

We have to find the first and second derivative of f(x)=x^(2/3)(6-x)^(1/3) I have the first derivative as being (4-x)/(x^(1/3)(6-x)^(2/3)) And that I know is right. The second derivative is -8/(x^(4/3)(6-x)^(5/3)) I did all the work but I am not getting

Rewrite each sentence, placing commas where they are needed. Uderline each compound subject once compound predicate twice. 1. The bat and glove(C.S) are in the bench.(C.P.) 2. The ballplayer swimmer, and runner, come(C.S.) from the same town.(C.P.) 3. The

148. ## algebra

a celluar phone company offers a contract which the cost c, in dollars, of t minutes of telephoning is given by c=0.25(t-600) plus 57.95 where it is assumed that t is > or eqaul to 600 minutes. what time will keep cost below 102.45 and 135.20?

149. ## Physics

A worker at the top of a deep well, drops a hammer into the well. The hammer takes 2.81x10^-2 minutes to fall. How deep is the well?

150. ## Physics

A dynamite blast sends a piece of rock (shatter) straight upwards. After 2.31x10^0 s the piece of rock has a velocity of 1.56x10^1 m/s. Assuming there is no air resistance, what is the initial velocity of the rock, to two significant figures?

151. ## math

neglecting wind restitance,the height,h,in feet,of a sky diver,t,seconds after she jumps from an airplane 1,648 above the ground is given by the formula h=-16ft square +1648.if the parachute opens 4.5 secinds after the sky diver leaveshe airplane,about how

152. ## Chemistry

What are the charges of the ions in an ionic compound containing iron(III) and fluoride ions? a)iron(III)- i got 3+ b) flouride- im not sure on this one c)Write the formula for the compound. (Type your answer using the format CO2 for CO2.) - Fe3F2... i rly

153. ## Probability

A survey finds that 38% of kids like tv, 24% like radio, and 13% like both. A.Find percent of kids that like tv but not radio. B.Find the percent of kids that like neither tv or radio. C.Find the percent of kids like either tv or radio D.Find the

154. ## Biology

The ___ from photosynthesis is a reactant for glucose metabolism. A. H2O B. ATP C. lactic acid D. CO2 E. O2 Thanks.

155. ## math

what percent of 250,148,571 is 136,800,000

156. ## Math

Gravity on the moon is about one-sixth of gravity on Earth. An astronaut standing on a tower 20 feet above the moon's surface throws a ball upward with a velocity of 30 feet per second. The height of the ball at any time t (in seconds) is h(t) = -2.67t

157. ## Physics

A 0.400-kg ball is dropped from rest at a point 1.80 m above the floor. The ball rebounds straight upward to a height of 0.730 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?

158. ## algebra

The Yankee Clipper leaves the pier at 9:00 am at 8 knots. A half hour later, The River Rover leaves the same pier in the same direction traveling 10 knots. At what time will the River Rover overtake The Yankee Clipper?

159. ## statistics

What percentages of students studied 30 hours or less? These hours ranged between 10-50 hours with a mean of 35 and a standard deviation of 5.

160. ## family math problem solving

ms. jones my great cat ate 125 hamburgers over a five day period. each day she ate seven more hamburgers than the previous day. how many hamburgers did she eat on the first day

161. ## algebra

i have a homework problem that i don't know how to do it the question to the problem says: Find the value of expression.identify the property used in each step and the problem is:7(10-1x3)

162. ## History

was the Reign of Terror necessary to preserve the French Revolution?

163. ## Math

How do I find the rule when the number is descending 9,6,3,0

Math. How can I make up a data set of at least 12 numbers that have the following landmarks, maximum 18: mode: 7, range: 13, median: 12?

165. ## English

1. I am looking for a dress to wear to the party. 2. I am looking for a dress to wear at the party. 3. I am looking for a dress to wear to the party. (Which one is correct? Which preposition do we have to use before 'the party'?)

166. ## Physics

a circuit contains a 9v battery and two 1 ohm bulbs. what is the voltage drop across each.

Rewrite each sentence, placing commas where they are needed. Uderline each compound subject once compound predicate twice. 1.Your bat ball and glove,_ are on the bench.= 2. The ballplayer swimmer and runner, come_ from the same town.= 3. The girl can run

168. ## physics-non calc

a hammer was released from rest vi=0m/s taking 1.12 seconds to fall 1 meter. How do you solve that

mr.mancho my great dane ate 125 hot dogs over a five day period. each day he ate seven more hot dogs than on the previous day. how many hot dogs did he eat on the first day.....

170. ## statistics

Sample size is 24, Mean rate of 6.50%, Standard Deviation is 1.20. Calculate 90% of confidence interval

171. ## math

what is the range for 4.987+28.27+0.098

172. ## algebra 1

Suppose the probability that an American League team will win the World Series is 60%. What is the probability that a National League team will win the World Series in the 5th game? Express your answer to the nearest whole percent.

173. ## Chemistry

A 30 ounce iron bar at 425 degrees Fahrenheit is placed in 2.00 quarts of water at 80.0 degrees Fahrenheit. What will be the change in temperature of the iron bar in degrees Fahrenheit? (Assume 1/3 heat lost to the surroundings) Specific heat of iron= .473

What are some of the operations management practices that can help bring manufacturing back to the U.S?

175. ## Math

A survey finds that 38% of kids like tv, 24% like radio, and 13% like both. A.Find percent of kids that like tv but not radio. B.Find the percent of kids that like neither tv or radio. C.Find the percent of kids like either tv or radio D.Find the

176. ## math

Let f:A->B, where A and B are nonempty, and let T1 and T2 be subsets of B. a.Prove that f^-1(T1 U T2)= f^-1(T1) U f^-1(T2). b.Prove that f^-1(T1 intersects T2) = f^-1(T1) intersects f^-1(T2). I think once I see a I can do b. c. Prove that f^-1(T1) -

177. ## physics

A person using a ladder supported on vertical wall is 3/4 of the way up the ladder. If the person climbing the ladder has a weight of 980 newtons and the ladder is 4.89 meters long, how far from the wall can the base of the ladder be placed, and not slip?

178. ## probability

68 % of kids watch tv daily. out of 12 kids what is the probability that: a. Exactly six kids watch tv daily b. Six or less kids watch tv daily c. Seven or more kids watch tv daily d. Find the mean for the distribution

179. ## french

Can you check these thanks. Part 1 Directions: Répondez selon le modèle. Elle va souvent à Montréal? Oui, elle y va souvent. (As you can see we are now learning the pronoun y) 1. Ils vont souvent à Paris? Answer: Oui, ils y vont souvent. 2. Ils

180. ## english

from civil peace by chinua achebe ehy do the theives help the lwegbus shout for the poice? that's is ironic about what they say and do?

181. ## 5th grade essay of part of plants

writting outline for 3 paragraph of an essay of part of flower

182. ## physics

A person using a ladder supported on vertical wall is 3/4 of the way up the ladder. If the person climbing the ladder has a weight of 980 newtons and the ladder is 4.89 meters long, how far from the wall can the base of the ladder be placed, and not slip?

183. ## Algebra 2

Complete the system for no possible solutions: x+y+z = 7 y+z = ? y+z=?

184. ## Into to Ethics in Policing

I need to explain the ethcial frameworks used in the movie "A Time to Kill."

185. ## Math

Calculate the simple interest on each amount the total amount at the end. A deposit of \$2550.00 that earns 3% interest over 30 months. Pleas show your steps! Thankyou (:

186. ## algebra

Pythagorean Theorem, The height of sueLo's 5th floor apartment window off the ground is 10 feet longer than the distance from the base of the apartment building to wall. She is concerned that the fire department's 50-foot ladder would not be able to reach

187. ## High School

Please provide me some links to websites where I can buy and download US High School text books. I am now in a UK based school in Asia but I will be moving to America next year. So please provide useful links.

188. ## calculus

the graph of f(x) passes through the point (0,6). the slope of f at any point P is 2 times the y-coordinate of P. find f(1)

A polygon has a perimeter of 24mm. Find the new perimeter after a scale factor of 1/4 is applied?

190. ## high school

How many revolutions are made by a 28inch bicycle wheel min over one mile

191. ## calculus

y=3⋅2^x Find the equation of the line tangent to the graph of y at x=1.5.

192. ## algebra

A cube measuring 6.7 cm along each edge has a mass of 78g. Find the density of the cube.

193. ## algebra

can somebody tell me how to solve this inequality equation? (a-2)(a-3)

She will become a physicist one day. Have to identify the verb or verb phrase and then tell if it contains a linking verb or does not. will become=verb phrase contains linking verb

195. ## sentence writing

Which sentence below grammatically INCORRECT? Jacob, my best friend, believes that he is as smart as I am. -------------------------------------------------------------------------------- If anyone understands the directions, it is she.

196. ## math

input ouput 2 8 7 3 5 5 0 0

197. ## geometry

If 9 = (7x)° and 10 = (3x)°, what is the measure of 16 such that x || z?

In 2009 the American League’s New York Yankees won the World Series. The Yankees have played in a total of 40 World Series. Of those 40 appearances the Yankees have won 27 championships. Based solely on this data, what is the probability that the New

199. ## calculus

The graph of f(x) passes through the point (0,3) . The slope of f at any point P is 3 times the y- coordinate of P . Find f(1)

200. ## IT210

Identify at least two data structures that are used to organize a typical file cabinet. Post actual pseudocode or code examples of these data structures. Why do you feel it is necessary to emulate these types of data structures in a computer program? For

201. ## science

In most States, the right to vote was originally denied to all but which one of the following groups?

202. ## physics

An object of mass M = 911 g is pushed at a constant speed up a frictionless inclined surface which forms an angle θ = 50o with the horizontal as shown in the figure below. What is the magnitude of the force that is exerted by the inclined surface on the

203. ## math

Decide if the statement is true or false, tell why. 24 is a factor of 8

204. ## calculus

a ball is thrown directly upward with a velocity of 40 feet/seconds. its height in feet after t seconds is given by h(t)equals 40t-16t squared

205. ## American Culture

Sometmes I have difficulty understanding the questions to complete my assignments. Does pop culture only refer to music? I want to elaborate on the question. Does Pop culture having a greater societal value beyond what is offensive?

206. ## geo

can u give me some points on against mosquito fogging because i am in green party i have this points: negative impact on environent human issue but i need two more points to discuss

207. ## English

I forgot to include the following sentencens.I hope you can check the grammar here,too. 1) Our classroom is lit by neon lights.There are two neon lights hanging from the ceiling which light the room up. 2) Have you been to (or in?) the new suermarket yet?

208. ## Chemistry

If you converted a barometric pressure of 30.03, how would you convert to mm Hg and how would you convert that to mm H2O.

209. ## english

What is once in a minute, twice in a moment, and never in a thousand years?

210. ## social studies

what are two ways the united states government helped the former slaves after the civil war

211. ## math

Of the two fractions 15/21 and 19/17 which is smaller?

213. ## Introductory physical science

We needed to find the sensitivity of our equal arm balance and the question I need help with is....What are 2 reasons why you need to know the sensitivity of your balance?

214. ## statistics

What percentages of students studied 30 hours or less? These hours ranged between 10-50 hours with a mean of 35 and a standard deviation of 5.

215. ## college math

I if a Thrifty Market has a parking lot with dimension 125 feet by 210 feet. How many square yards is that?

216. ## algebra

-63 +15s = 14s + 18

217. ## Biology

Variation in biology is a) inevitable b) exciting c) the raw material for natural selection d) best described by statistics e) all of the above

218. ## Physics

At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.0 m, the bottom of the wheel is 1.9 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions

219. ## Economics

If exports rose by 22.5% what would happen to a country's economy?

220. ## mikes

name the slope and y-intercept of y + 3x = -1

221. ## Physics

A soccer player launches a ball at an angle of 40 degrees, with an initial velocity of 23 m/s. What are the horizantal and vertical for this problem??

222. ## social studies

what happened during the spanish invasion of mexico?

223. ## Pre calculus

use f(x)= { x^2 +5 if x ≤ 1 { -x^2+4x+3 if x>1 to find the answers to the following: 1. f(2) 2. f(4)-f(-2)

224. ## north america

How else would have the Anglo-Americans developed economically and politically avoiding their current economic stability?

225. ## english

sam's essay lacked a clear beginning, middle, and end as well as weak and limited transitions. in which area was sam's essay weak? a. content b. organization c. tone d. mechanics

226. ## English

1.I donated the money to the Red Cross. (In this sentence how do you pronounce 'donated'? Do we have to stress the first syllable of the second syllable? Are both OK? Which one is common?)

227. ## precalculus

Find the dimensions of a square cardboard box (open top) that holds 100 cubic inches and is 4 inches deep?

228. ## English

Topic sentence: Lowry uses imagery in his novel to make his writing come alive.

229. ## chemistry!

how do we find the grams ppt of the following: 0.500 M CaCl2= 10 mL 0.500 M Na2CO3= 20 mL Ca:CO3= 1:2 grams ppt= ?

230. ## nursing research

qualitative, quantitative, and outcomes research? under which circumstances is each type of research is most appropriate? give examples of each

231. ## math

what is the range for 3.89 +42.71 +12.32

232. ## english

What do you think are the similarities between Cathy Freeman, Deriba Merga and Oprah Winfrey? Please explain to me in details..

233. ## calculus

find the points on the graph of y=secx where the tangent is parrallel to 6y-4x=8. (0 is less than or equal to x and x is less than or equal to 2pi). Use exact values.

234. ## english

"In this tongue-in-cheek ironic statement..." is the beginning of a sentence in my essay. Is "tongue-in-cheek ironic sentence" redundent?

235. ## Physics

A plane travels with a uniform velocity of 3.399x10^1 m/s for a period of 2.267x10^0 seconds. What distance is travelled during this time, in meters

236. ## Physics

A track athlete runs exactly one complete lap of the track, 400 m circumfrence, in 4.35x10^1 seconds. What is the speed of the athlete , to two significant figures, if they are assumed to run with a constant velocity for the entire time?

237. ## english

hi i am doing a english essay on the pros of animal testing. I need to find a good statistic on it, mostly about testing on cosmetics. Can someone help me find one because i looked all over google and still cant find one. THank you

238. ## math

what is the LCM of 8 12 and 5

239. ## Ms.Sue

How does she know everything is she one of the tutors?

240. ## Statistics

What is the simple test of independence?

241. ## science

if a city was to improve the natural environment of a park what is the best thing to do

242. ## Writing / History

Compare And Contrast Rosa Parks And Jehan Sadat i need help

243. ## LUZ

READ the paragraphs and answer the questions. She feels her skates leave the ice. She spins through the air and lands with a glide. The crowd goes wild! After Connie leaves the ice, she looks up at the scoreboard and smileS. Her coach runs to hug her. 1.

244. ## computer information

Create a flowchart for a program that will sort the top 1,000 customers by their annual purchase amount and print the names and addresses of the top 100 customers, or fewer if there aren’t 100 customers.

245. ## math

what is the mathematical expression of 9+4x5 divided by 2 ?

5+6x9/3=23

247. ## physical science

Cheetah is running to eat you at 24m/s. You are south 240 meters away and unaware. How much time do you have?

I need you to help me pick a biome?

How can lean manufacturing and near-sourcing help a company gain a competitive edge and prepare for the future?

250. ## English

are these right sentences? 1)Shahrayar was all doing this to keep his heart safe. 2) In world literature, we came to know how every story ended by the power of the sword, but this story breaks the tradition and shows human‘s intelligence can also solve

251. ## history

Why was geroge washingtin elected

252. ## algebra

solving equations -x^2, if x=-1, etc

253. ## Probability help

The heights of the buildings are normally distributed. The mean of the heights is 275 feet and the standard deviation is 30 feet. A. What is the probability that the buildings height is over 280 feet? B. What is the probability that a sample of 80

254. ## math

17x – 42 = -39 i need to show the steps for solving this equation

255. ## quick ?

What is meant by the term concrete reality?

How many shapes have a perimiter that's 30 cm?

257. ## math

Shonda owns a bussiness that transfers photos to CD-ROMs. She charges her customers \$24.95 for each CD-ROM. Which of these equations could be use to calculate her profit 'p' for creating 'n' CD-ROMs? a)p=(24.95-0.8)n - 575 b)p=(24.95+0.8)n + 575 c)p=24.95n

what trits, skills or styles did margret thatcher use effictively? what traits or behaviors got in her way?

How many atoms of element "R" are present in 55.80 g of (AH3)4(R2O3)4 (molar mass = 478.17 g/mol)? Please help. I've tried going (g of molecule/mol)x(1 mol of molecule/ 55.80g)but I'm not really sure what to do with this.

260. ## Math - Tangent of a line

Determine the point on the curve y=x^2(x^3-x)^2 where the tangent line is horizontal.

261. ## english

I need a list of idioms or just a few

262. ## math

f(x)=sqrt(x-2)-4 f(x)=0

263. ## Com 220

what advice would you provide for students starting this course

264. ## algebra

find standard form and slope, if it exists, of each equation y=6x-2

265. ## calculus

finf y'' by implict differentiation √x + √y = 1

266. ## social study

why did atahualpa order to troops not to fight the spanish

267. ## math

A ball is thrown upward from a height of 100 ft. with an initial velocity of 80 ft/sec. Find the function.

268. ## childhood

should children be served drinks in treated ceramic?

269. ## math

what is the range for20.751 +2.55 +17.4

270. ## socials 9

which many people react a fear ub spite of evidence and a good sense. sometimes this creates a ''mob mentality'' that destroys innocent

271. ## math

simplify the expression: 3(2a+b)-5+4b -5=negative 5.

272. ## Social Studies

I need a current event due tomorrow (10-15-10) and my teacher said there needs to be two sides to the subject, and i need help

273. ## Algebra

Determine the number of terms in the expression 14m - 16.

274. ## Math

use f(x)= { x^2 +5 if x ≤ 1 { -x^2+4x+3 if x>1 to find the answers to the following: 1. f(2) 2. f(4)-f(-2)

wat its prime number

276. ## science

i need you to help me pick a biome

277. ## algebra

d=(1/2)at^2; solve for a. i got a=d/([1/5])t^2) but i don't see that in any of the possible responses: a. a= (2d)/t^2 b. a= 2dt^2 c. a= (dt^2)/2 d. a= d/2t^2 What did I do wrong? & can you please show detailed work?

278. ## calculus

f(x)=1-3x when f(x)-f(1)/x-1

279. ## college

Using your textbook (Chapter 5), describe the model of consumer buyer behavior. Providing a list of the steps or a graphic of the model is not adequate as you must explain how the process works in the real world using your own words.

280. ## Science

for anybody:there is evidence that human beings could be a part of the 6th extinction on earth. Do you believe this is true? Why is Why not? Write a statement explaining your beliefs.

281. ## math

2(b -3)+5=3(b-1)

What do you think 24*3.7 is ???

283. ## Math-Calc AB

e^(-x/2) + xe^(-x/2) = 0 solve for x

284. ## spelling

what is meaning of groan

9(x-5)^2/3

286. ## Math

486 over -40 in simplest terms! i cannot figure this out

287. ## human resources

i need 10 simple and advance technology used in woodshop