Questions Asked onMarch 20, 2011

1. Chemistry

In the reaction 2H2S + 3O2 -> 2SO2 +2H2O, the oxidizing agent is 1.oxygen 2.water 3.sulfur dioxide 4.hydrogen sulfide oxygen?

2. Chemistry

which equation represents an oxidation-reduction reaction? 1.HCl+KOH-->KCl+H2O 2.4HCl+MnO2-->MnCl2+2H2O+Cl2 3.2HCl+CaCO3-->CaCl2+H2O+CO2 4.2HCl+FeS-->FeCl2+H2S

3. physics

if electron are caused to fall through a potential difference of 100000 voltage , determine their final speed if they were initially at rest.

4. calculus

can you please help me solve this problem if dy/dx=ycosx and y=3 when x=0, then y=

5. Chemistry

Explain why the freezing point of a pure solvent is constant, whereas the freezing point of a solution decreases with steady cooling.

6. Physics

Two metal spheres having charges of +4.0 x 10^-6 coulomb and +2.0 x 10^-5 coulomb, respectively, are brought into contact and then separated. After separation, the charge on each sphere is...

7. Physics

Search: The figure shows three crates being pushed over a concrete floor by a horizontal force of F magnitude 440 N. The masses of the crates are m1 = 30.0 kg, m2 = 10.0 kg, and m3 = 20.0 kg. The coefficient of kinetic friction between the floor and

8. Chem

what occurs during the reaction below 4Hcl+MnO2-->MnCl2+2H2O+Cl2 1.the manganese is reduced and its oxidation number changes from +4 to +2. 2.the manganese is oxidized and its oxidation number changes from +4 to +2. 3.the manganese is reduced and its

9. Math

I cannot remember how to figure out this problem. "Ten friends share 3 pizzas equally. What fraction of a whole pizza does each friend get?" Would it be 3/10? Not looking for the actual answer but really how i can figure it out. Thank you!

10. chemistry

Barium sulfate is listed as insoluble on solubility tables. It does, however, dissolve to a small extent. Its solubility at 50 'C is 0.00034g in 100. g of water. Express this solubility in parts per million -I know the equation is ppm= (grams of solute/L

11. physics

A 680 newton student runs up a flight of stairs 3.5 m high in 11.4 seconds. The student takese 8.5 seconds to run up the same flight of stairs during a second trial. 1)Find the work done by the 680 N student in climbing the stairs 2) Determine the power

12. Physics

a) If the work function for a certain metal is 1.8 eV, What is the stopping potential for electrons ejected from the metal when light of wavelength 400 nm shines on the metal? b) What is the maximum speed of the ejected electrons?

13. Chemistry

How many grams of potassium chlorate, KClO3(s) must decompose to produce potassium chloride, KCl(s), and 1.45 grams of oxygen gas?

14. physics

1) what is the efficiency of a frictionless inclined plane? 2) how would you increase the efficiency pf an inclined plane?

what does "sitting-hen" mad mean

16. Physics

A car going 50mi/h overtakes and passes another car moving at 45 mi/h. what length of road is required for the operation? assume that each car is 15 ft long and that there is a 60-ft space between them before and after passing. taking into account the

What is the meaning of the simile like a cat in a corn crib

18. physics

1.) A small sphere of charge 2.4 μC experience a force of 0.36 N when a second sphere of unknown charge is placed 5.5 cm from it. What is the charge of the second sphere? 2.) Two identically charged sphere placed 12 cm apart have an electric force of0.28

19. Chemistry

The maximum solubility of silver sulfate, Ag2SO4 [molar mass = 312], is 4.50 g/L at 25°C. Silver sulfate dissociates by the reaction below: Ag2SO4(s) 2 Ag+ (aq)+ SO4¯² (aq) 1.What are the [Ag+] and [SO4¯²] in a saturated solution of silver sulfate

20. physics

A flat (unbanked) curve on a highway has a radius of 230.0 . A car rounds the curve at a speed of 28.0 .What is the minimum coefficient of friction that will prevent sliding?

21. algebra (parabolas)

you throw a wad of used paper towards a wastebasket from a height of about 1.3 feet above the floor with an initial vertical velocity of 3 feet per second. a. write and graph a function that models the height h (in feet) of the paper t seconds after it is

22. Chemistry

5.00kg glycol, C2H4(OH)2, [this is anti-freeze!] is added to your radiator. If your radiator contains 12.0kg of water, what would be the freezing point of the water-antifreeze mixture? The molal freezing point depression constant for water is 1.86 degrees

23. physics

A driver of a car traveling at 15.9 m/s applies the brakes, causing a uniform deceleration of 1.7 m/s2. How long does it take the car to accelerate to a final speed of 13.0 m/s? Answer in units of s. b) How far has the car moved during the braking period?

what does the simile as wet as a dirt dauber's nest mean

25. physics

A sledge loaded with bricks has a total mass of 18.9 kg and is pulled at constant speed by a rope inclined at 19.3° above the horizontal. The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge

26. Chemistry

in the reaction:Ni+SN4+-->Ni2+ (+)Sn2+ which species has been reduced? 1.Ni 2.Sn4+ 3.Ni2+ 4.Sn2+ i know its def Sn but im not sure which one.

27. History

How did free enterprise effect industrialization?

28. Math Algebra 2

A rectangular garden is fenced on three sides with a wall forming the fourth side. the total length of the fence is 70m. the area if the garden is 600m^2. find the dimensions of the garden.

29. Chemistry (Acids and Bases)

THIS HAS TWO PARTS NaOH(s) was added to 1.0 L of HCl(aq) 0.42 M. 1) Calculate [H3O+] in the solution after the addition of 0.13 mol of NaOH(s). 2) Calculate [H3O+] in the solution after the addition of 0.81 mol of NaOH(s).

30. biology

what is the function of the rat diastema??

31. physics

an object weighing 15 newtons is lifted from the ground to a height of 0.22 meter. What is the approximate increase in the object's gravitational potential energy?

32. Chemistry

3.92g of a nondissociating compound are dissolved in 400.g of liquid benzene. The freezing point of the solution is 5.19 degrees celsius. Calculate the molar mass of the compound. (The freezing point of the pure benzene is 5.50 degrees celsius and its

33. Math

Tracy Company, a manufacturer of air conditioners, sold 100 units to Thomas Company on November 26. The units have a list price of \$500 each, but Thomas was given a 30% trade discount. The terms of the sale were 2/10, n/30. Thomas uses a periodic inventory

asked by Bobbi Loffredo
34. physics

A car is driven 110 km west and then 25 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)? ...km ... degrees south of west

35. Chemistry

Calculate the moles of oxygen gas needed t burn 1.22 moles of ammonia, NH3(g). Find the moles of nitrogen dioxide gas and gaseous water produced.

36. physics

A dog sits 3.0 m from the center of a merry- go-round. a) If the dog undergoes a 1.2 m/s2 cen- tripetal acceleration, what is the dog’s linear speed? Answer in units of m/s. b)What is the angular speed of the merry-go- round? Answer in units of rad/s.

37. physics

A ball is dropped from 1.5 m and rebounds to 1.2m. How many times will it bounce before losing 90% of it's energy? I assumed energy was hight times gravity so when the rebound was only 10% of the original amount, 90% of the energy is lost. Is this the

38. physics

A 20. kg block is placed at the top of a 10. meter-long inclined plane. The block starts from rest and slides without friction down the length of the incline. (A diagram shows a height of 5.0 m, the 10. m length of incline/hypotenuse and the 20. kg block

39. chemistry ASAP please!!

One reaction that destroys O3 molecules in the stratosphere is NO + O3  NO2 + O2 When this reaction was studied in the laboratory, it was found to be first order with respect to both NO and O3 with a rate constant of 1.9 x 104 mol L-1S-1. If [NO] = 1.2

40. physics

An airplane has an effective wing surface area of 16 square meter that is generating the lifting force. In level flight the air speed over the top of the wings is 62m/s, while the air speed beneath the wings is 54m/s. What is the weight of the plane?

41. chemsitry

Calculate the mass in grams of sodium bromide, NaBr, are needed to prepare 250.0 mL of a solution of sodium bromide that is 3.50% (m/v).

42. science

Is it possible to study just one atome?why?

43. calculus

find an equation of the curve that satisfies dy/dx=4x^3y and whose y-intercept is 7

44. Physics

Consider a conducting spherical shell with inner radius b = 0.862 m and outer radius c = 1.21 m. There is a net charge q2 = 3.82 ìC on the shell. At its center, within the hollow cavity, there is a point charge q1 = 2.89 ìC. Determine the flux through

45. mba business reserach methods

Sampling A manufacturing company's quality control personnel have recorded the proportion of defective items for each of 500 monthly shipments of one of the computer components that the company produces. See data below. The company doesn't have time to

46. physics

After a completely inelastic collision between two objects of equal mass, each having initial speed v, the two move off together with speed v/6. What was the angle between their initial directions? if this is the equation 2mvcos(theta)=2mv/6 what numbers

Water is flowing in a straight horizontal pipe of variable cross section. Where the cross-sectional area of the pipe is 3.50·10-2 m2, the pressure is 5.30·105 Pa and the velocity is 0.310 m/s. In a constricted region where the area is 12.90·10-4 m2,

what does the simile as red as a turkey gobblers wattle mean

49. geometry

given constant perimeter (people),Irene made a rectangle with an area (tables) of 196 sq. units. she finds that this is the largest area (greatest number of tables) possible for the given perimeter. Irene drew a rectangle with an area of 196 sq. units. she

50. physics

if electron are caused to fall through a potential difference of 100000 voltage , determine their final speed if they were initially at rest.

51. Statistics

Twenty people are to be seated at 3 Circular restaurant tables that seat 8,7, and 5 people respectively. Determine the number of ways that this can be done. Express your answer in scientific notation to two decimal place.

52. English- Figurative Language

What type of figurative language is the following sentence? : Oh, never, if I live to a million, Shall I feel such a terrible pain.

53. Algrebra

How do you insert grouping symbols to make this equation true? 14 divided by (5+2) +8=10 14/7=2+8=10 Please confirm, I really have an issue with Algebra

54. physical science

What happens to the gravitational force between two objects if their separation is doubled? The force of attraction is doubled. the same. half as much. one fourth as much.

55. Chemistry

A camping lantern uses the reaction of calcium carbide, CaC2(s),and water to produce acetylene gas, C2H2(g), and calcium hydroxide, Ca(OH)2(s). How many grams of water are required to produce 1.55 moles of acetylene gas?

56. math

2 trains leave the same train station at the same time, one train travels northeast at 50 mph, the other train travels due west at 40 mph, how far apart are the trains after two hours

57. math

what is probability of getting a multiple f 3 on the spinner

58. physicals science

A 2.9-kg pile of aluminum ( = 2.70 g/cm3) cans is melted, and then cooled into a solid cube. What is the volume of the cube?

59. physics help

An rectangular above-ground swimming pool is 9 m long and 4 m wide. The pool wall has a constant height of 3 m above the ground. Take atmospheric pressure to be 1 atm = 10^5 Pa and g = 10 m/s2. (a) Calculate the weight of the air that fills the pool when

60. Economics

why is it appropriate for the government to encourage private firms to build new roads.

61. chemistry

a balloonist is preparing a trip in a helium balloon. the trip begins in early morning at a temp of 15 degrees Celcius. By mid afternoon, the temp has increased to 30 degrees C. assuming the pressure remains constant at 1.00 atm, for each mole of helium,

62. physics

ball of mass m = 0.2 kg is attached to a (massless) string of length L = 3 m and is undergoing circular motion in the horizontal plane, as shown in the figure. What should the speed of the mass be for θ to be 46°? What is the tension in the string?

63. Physics

A metal sphere has a net negative charge of 11 x 10^-6 coulomb. Approximately how many more electrons than protons are on the sphere?

64. chemistry

would the measure absorbance id an FENCS+ ion solution be higher, lower, or unaffected if there were fingerprints on the cuvette? briefly explain.

65. Chemistry

Calculate the number of moles in these quantities. 1. 25.0 g KNO3 2. 5.4 x 102 g (NH4)2C2O4

66. Math

On July 15,2009, the Nixon Car Company purchased 1,000 tires from the Harwell Company for \$50 each. The terms for the sale were 2/10, n/30. Nixon uses a periodic inventory system and the net method of accounting for purchase discounts. 1. prepare the

asked by Bobbi Loffredo
67. English

I'm having trouble writing an introduction to this literary analysis. It's for "A Very Old Man with Enormous Wings". I'm supposed to show how the elements point of view, character, setting, tone and style, and symbolism convey the authors themes or central

68. chemistry

How many grams of oxygen gas are required to react completely with 14.6 g of solid sodium to form sodium oxide, Na2O(s)?

69. chemistry

How many grams of solid copper must react with silver nitrate, AgNO3(aq), to produce 5.5 g of solid silver and copper(II) nitrate, Cu(NO3)s(aq)?

70. Lit

The reasons Mcbeth fels he should not kill Duncan?

71. health,safety,nutrition training for early childho

what are some considerations for the development of well-defined health,safety and nutrition practices for an early learning environment

72. physics

another question: the 20 kg block is at the top of a 10 m long inclined plane. The block starts from rest and slides without friction down the length of the incline. The block is 5 m high. 1) Determine the gravitational potential energy of the block at the

73. chemistry

The activation energy for the reaction in which CO2 decomposes to CO and a free radical oxygen atom, O, has activation energy of 460 kJ mol^-2. The frequency factor is 2 x 1011 s^-1. What is the rate constant for this reaction at 298 K?

74. physics

A staging that weighs Wstaging supports a painter weighing 560 N. The reading on the left scale is 610 N and the reading on the right scale is 460 N. What is the weight of the staging? Answer in units of N.

75. physics

An rectangular above-ground swimming pool is 9 m long and 4 m wide. The pool wall has a constant height of 3 m above the ground. Take atmospheric pressure to be 1 atm = 105 Pa and g = 10 m/s2. (a) Calculate the weight of the air that fills the pool when

76. physics

A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?

77. chemistry

What happens when you have a mixture of CO2 hydrate and methane hydrate when the temperature is 2.5 C and the pressure is 2 MPa. Does the methane come off and the CO2 hydrate remain

78. chem

consider the equation for the following questions 2C2H6(g) + 7o2(g) 4 CO2(g) +6H2O(g) How many grams of CO2 are produced when 2.00moles of C2H6 react with sufficient oxygen?

79. chemistry

Free radicals are also important in many environmentally significant reactions. For example, photochemical smog, which forms as a result of the action of sunlight on air pollutants, is formed in part by the following two steps. X NO2 NO  O O  O2 O3 UV

80. physics

A negatively charged balloon has 4.6 μC of charge. How many excess electrons are on this bal- loon? Answer in units of electrons.

81. psy 325

16) A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large or small meal. After eating the meal, their hearing was tested. The hearing ability scores (high

82. chemistry

Why should the volume of standard base (or acid) needed to reach the equilvalence point in a titration be more than 10.0 mL?

83. chemisty

4. N2+3H2----2Nh3 k=1.2 at a T=375C you initially have 0.249mol of N2. 3.21*10^-2mol of H2, and 6.42*10^-4 mol of NH3 in a 3.5L container a.what is the equation to determine the reaction quotient, Q b.determine the reaction quotient Q c. compare Q and K.

84. Chemistry (Acids and Bases)

The natural pH of rainwater is 5.6. The acidity of rainwater is caused by the dissolution of (TRUE OR FALSE) boric acid sulfuric acid carbonic acid calcium carbonate calcium oxide nitric acid

85. physics

A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s

86. physics

another question: the 20 kg block is at the top of a 10 m long inclined plane. The block starts from rest and slides without friction down the length of the incline. The block is 5 m high. 1) Determine the gravitational potential energy of the block at the

87. physics

in a shuffleboard game, the puck slides a total of 12 m before coming to rest. if the coefficient of friction is 0.21, what was the initial speed?

88. physics

a)A dielectric in the shape of a thick-walled cylinder of outer radius R1 = 5.15 cm, inner radius R2 = 3.65 cm, thickness d = 3.95 mm, and dielectric constant κ = 3.87 is placed between the plates, coaxial with the plates, as shown in the figure.

89. algebra

What is the maximum number of cubes measuring 5cm on an edge that can be obtained by cutting a solid cube that measures 1 m on an edge?

90. geometry

A parallelogram has sides of length 3 and 5 and a diagonal length 10. is the quadrilateral a rectangle? please explain

91. physics

Suppose the vertical loop has a radius of 8.92 m. What is the apparent weight (Wap) of a rider on the roller coaster at the bottom of the loop? (Assume that friction between roller coaster and rails can be neglected. Give your answer in terms of m and g.)

92. separation of variables

is the answer to find an equation of the curve that satisfies dy/dx=4x^3y and whose y-intercept is 7 y=7e^(x^4)

93. algebra

Write the equation for this situation: During the month of February, the depth, d, of snow in inches at the base of one ski resort could be approximated by adding 7 to twice the number of days, t, since January 31st. Then graph the equation and use the

94. Physics

A car moves with a speed v on a horizontal circular highway turn of radius is R = 100. Assume the height of the car’s center of mass above the ground is h = 1 m, and the separation between its inner and outer wheels (car's width) is w = 2 m. The car does

95. Physics

Dr. Miller pulled a wooden crate at a constant accelerationof 1.23 meters per second per second with a forceof 752 newtons at an angle of 22 degrees above the horizontal. The coefficient of kinetic friction between the crate and the floor was 0.347. Find

96. calculus

find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3

97. mathematics trignometry

prove that the following are identity 1. (cotA+cosecA-1)/(cotA-cosecA+1)=cosecA+cotA 2. (sinA-cosA+1)/(sinA+cosA-1)= 1/(secA-tanA)

98. Pre Calc--- Repost

I already asked this, but I didn't really understand the answer I got. I got the general idea, but I don't have a good enough understanding to answer the question. Writing to Learn: In a certain video game a cursor bounces back and forth horizontally

99. physics

A harmonic wave is traveling along a rope. The oscillator that generates the wave com- pletes 44.0 vibrations in 26.9 s. A given crest of the wave travels 359 cm along the rope in a time period of 11.6 s. What is the wavelength? Answer in units of m.

100. English

Can you please check one more thing: 1)The students were delighted by /with their exam results. Are "by" and "with" possible? Is the meaning the same as "they are pleased, satisfied, content with? their exam result? 2) They are depressed, sad, happy,

101. physics

A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?

102. physics

magine a straight line connecting the centers of the earth and the moon. At some point along this line the gravitational forces pulling a spacecraft towards the moon and towards the earth exactly balance each other, and the craft could just sit there in

103. physics

A skier of mass 72 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 65 m up a 30° slope (assumed frictionless) at a constant speed of 2.7 m/s? (b) What power must a motor have to perform this task?

104. Chemistry

I have 5.0 ml of lead II NITRATE and mix it with 20.0 ml of Sodium Iodide. what is the formula of the precipitate

105. physicalscience

The volume of a sample of water is 20 cm3. The mass of this sample is closest to

106. acc. alg 2

exponentiating to solve equations: solve the eaquation, cheack for extraneous solutions log5(x+4)+log5(x+1)=2

107. calculus

how do you solve the initial value problem by separation of variables dy/dx=-x^2y^2, y(4)=4

108. calculus

how do you solve the initial value problem by using separation of variables dy/dx=-xy^2 when y(1)=-0.25

109. Physics

The linear absorption coefficient for 0.05 nm x-rays in lead and in iron are respectively, 5.8x10(4) /m and 1.1x10 (4) /m. How thick should an iron shield be in order to provide the same protection from these x-rays as 10 nm of lead?

110. calculus

if dy/dt=-3y and if y=1 when t=0, what is the value of t for which y=1/3?

111. Chemistry

a redox reaction is a reaction in which 1.only reduction occurs 2.only oxidation occurs 3.reduction&oxidation occur at the same time 4.reduction occurs first and then oxidation occurs i think its 3 or 4.

112. Chemistry

Zn(s)+Cu2+(aq)-->Zn2+(aq)+Cu(s) which particles must be transferred from one reactant to the other reactant ? 1.ions 2.neutrons 3.protons 4.electrons 4?

113. math

ms. sue u havent answered my question yet.

114. Algebra

How do I solve 5*(3x+2)=75

115. physics

A dielectric in the shape of a thick-walled cylinder of outer radius R1 = 5.15 cm, inner radius R2 = 3.65 cm, thickness d = 3.95 mm, and dielectric constant κ = 3.87 is placed between the plates, coaxial with the plates, as shown in the figure. Calculate

116. chemistry

If 74.5 grams of a hot metal was added to 56.4 grams of water and the temperature of the water rose from 20.4 to 33.4 degrees, how many KJ of energy was lost by the hot metal? i need helping setting up where the numbers go. I'm lost

117. chemistry

A+B ---- C deltaH=-100kj and temp.=25C which direction would the reaction shift if.. a. the concentration of A was decreased b. the concentration of C was increased c. The temp. was increased to 100C

118. CHEMISTRY/

A student takes a 1.00 mL aliquout of 5.00*10^-4 M HCl solution and dilutes it to the mark with water in a 1000.0 mL volumetric flask. (a)What is the expected pH for the final solution at 25C? (b)What would be the expected pH if this solution were later

119. physics

Do electrons go to the north pole or south pole?

120. Chemistry

A first order reaction has a rate constant of 0.0733 s−1. What is the half life for this reaction in seconds? when I plug in the numbers in the formula, my answer was 9.45. But on the computer it says the answer is wrong. How do I find the right answer?

121. Chemistry

The following rearrangement reaction is first order: C3H6 ¨ CH3CH=CH2 The rate constant for this reaction is 6.7 ~ 10−4. How many minutes will it take for the concentration of C3H6 to drop to 11.75% of its initial value? How do I calculate this step

122. statistics

It has been stated that income increases with the amount of education one receives. Recently I sampled some managers (technical, construction, sales, and manufacturing), compared their salaries to each other and asked the amount of education that had

123. calculus

solve the initial value problem by separation of variables dy/dx=-xy^2, y(1)=-0.25

124. physics

A 20. kg block is placed at the top of a 10. meter-long inclined plane. The block starts from rest and slides without friction down the length of the incline. (A diagram shows a height of 5.0 m, the 10. m length of incline/hypotenuse and the 20. kg block

125. Algebra

In 1993, the life expectancy of males in certain countires was 62.3. In 1999, it was 66.1 years. Let E repesent the life expectancy in year t and let t represent the number of years since 1993. The linear funtion that fits the data E(t) =

126. English-

What is the theme of the book NUmber 8 by Anna Fienberg?

127. trig

determine wheather each of the following is an identity or not prove it 1. cos^2a+sec^2a=2+sina 2. cot^2a+cosa=sin^2a

128. mathematics trignometry

if tanA=ntanX sinA=msinX then prove that cos^2A=(m^2-1)/(n^2-1)

129. math 6

What is the volume of trapezoid and area?

130. calculus

The parametric curve x(t)=3cos(t) y(t)=7sin(2t) intersects itself at a point P=(x0,y0) where x0= y0= The slopes of the 2 tangents at this point are? THANK YOU!

131. Chemistry

In the reaction: Cu(s) + 2 Ag+(aq) ---> Cu2+(aq) + 2 Ag(s) 1.Cu 2.Cu2+ 3.Ag+ 4.Ag i know its Ag but is it Ag+ or just Ag? what does that extra plus mean?

132. calculus

locate all critical points sqrt(-58-4x^2+32x) thanks for any help!

133. Algebra 2

i actually have two questions. - the edge of one cube is 4 m shorter than the edge of a second cube. the volumes of the two cubes differ by 1216m^3. find the edge of the smaller cube. - the sum of the squares of the two larger of three consecutive even

134. math

Write the equation for the following situation: In one U.S. town, the annual consumption, b, of beef (in kg per person) can be estimated by adding 20 to half the years, t, since 1975. Then graph the equation and use the graph to determine the beef

135. MATH

Hello! I am trying to finish a math assignment. it was a bunch of math questions, and I am having a very difficult time with 5 of them. I have the answers to them though. Could somebody please help me with AT LEAST a few!? thanks!! 1) A square swimming

136. Math

Mr. Thatch needs to buy tables and chairs for his office suite. Tables cost \$90 and chairs cost \$40. Mr. Thatch can spend no more than \$1,000. a. Write an inequality that expresses this situation in terms of the number of tables(t) purchased and the number

137. Chemistry

In the reaction: Cu(s) + 2 Ag+(aq) ---> Cu2+(aq) + 2 Ag(s, the oxidizing agent is ? 1.Cu 2.Cu2+ 3.Ag+ 4.Ag i know its Ag but is it Ag+ or just Ag? what does that extra plus mean?

138. Programming Logic and Design

A program that accepts a plant's name, price, and the plant's light and soil preferences.

what is the meaning of as red as a turkey gobblers wattle

explain how internal and external influences may impact on business opportunities in NSW.

141. math

you have \$60, consisting of quarters and pennies. write an inequality that shows the different number of coins in piggy bank

142. Programming Logic

I need to create a program that has (at least) two variables, char and num. I need to use nested loops to print char, a character, in the form of the following pattern on as many lines and as many times as specified by num. For example, if char is “M”

143. science

a)A dielectric in the shape of a thick-walled cylinder of outer radius R1 = 5.15 cm, inner radius R2 = 3.65 cm, thickness d = 3.95 mm, and dielectric constant κ = 3.87 is placed between the plates, coaxial with the plates, as shown in the figure.

144. physics

I need to sketch a graph of the gravitational potential energy (y axis) of a block as a function of its kinetic energy (x axis). The block is at the top of an inclined plane. It starts from rest and slides without friction down the length of the incline. I

145. Chemistry

How many grams of lithium will combine with 29.1 g of sulfur to form the compound Li2S?

146. Landuage Arts

Can you give me a 40 minute lesson plan on themes, patterns and symbols found in literature from different era and cultures? The students need to apply knowledge of connotation and denotation to determine the meaning of words. Also to identify an author's

147. chemistry

calculate final volume required to reach 1% solution when 0.2g of sample is predigested with nitric acid 3mL then after 1day, if 1ml sample from this solution is digested in 10ml solution and diluted in 50 mL distilled water.

i need help to write a business report using key terms (explain how internal and external influences may impact on business opportunities in NSW). explain: relate cause and effect; make the relationships betwwen things evident; explain why and/or how.

149. English

1) I need to find a good site explaining the period between the two World Wars and after (with reference to the Irish question, the Suffragettes' Movement , the New Deal, the Walfare State, and the Swinging 1960s) on a blackboard. Actually, this kind of

150. algebra (parabolas)

find the axis of symmetry and vertex of the function. tell whether it goes upward or downward. 1. y=-xsquared+9 2. y=-2xsquared=7x-21

151. Mathematics

A landscape architect wants to maximise the area of a herbal garden. The fence around the perimeter of the area must be 60 metres long. The optimal width of the rectangular area is ?

152. Mathematics

A landscape architect wants to maximise the area of a herbal garden. The fence around the perimeter of the area must be 60 metres long. The optimal width of the rectangular area is ?

153. statistics

There are 4 small franchise Quick Food Stops in the Columbus area. Numbers of burgers sold on a daily basis was recently studied. There were 6 2-month periods studied. At the 0.05 level of significance determine of there is any difference in the average

154. physics

A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s

155. Calculus

I need help with finding first and second derivative--simplify your answer. Y=xtan(x) I solved first derivative xsec^2(x) + tan(x) I don't understand how to get the first...can someone show me the steps with explanation?

156. physics

You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift

157. math

A point moves along the x-axis, and its x-coordinate after t sec is x = 4t + 16. (Assume that x is in centimeters.) (a) What is the velocity? in cm/sec

158. Math

What is the difference between a linear and a quadratic model? How do I know which one is good for the graph? :S I know it has to do with equations to find R2

159. physics

A ball is dropped from 1.5m and bounces back up 1.2m. How many times will the ball bounce before it loses 90% of its energy? I figued since the ball bouced .8 times the original hight and 10% of 1.5m is .15m that that when the bounce hight reached.15m that

160. calculus

Locate all critical points ( both types ) of f(x)=sqrt(-58-4x^2+32x) Thanks

161. separation of variables

solve the value problem by separation of variables dy/dx=x^2/y when y=-5 and x=3

162. social studies

what facts are there on point of view on tariffs on imported goods

163. Physics

The game is called Ice Bocci. You play by sliding pucks across the ice into each other, sort of like marbles. One player slides the red puck straight into a stationary green puck. The red puck is sliding with a speed of 4 m/s and weighs twice as much as

164. chemistry

Lab on Determination of copper in brass. I have mass of brass at .1011g. My concentration of diluted solution's unknown is .0037957, My concentration of mg/ml Cu^2+ unknown is 241.2. My professor is asking me to determine the percent of copper. I know that

165. physics

Your spacecraft is in a circular, geostationary orbit around earth and you would like to fly to the moon. Draw a suitable Hohmann transfer orbit that will get you there. How long does the journey take? (Neglect the gravitational fields of the moon and the

166. algebra

Three points of a 5x5 square array are connected. How many square units are in the area of the largest possible triangle that can be formed?

167. algebra

You have just graduated from college and landed your first big job. You have always dreamed of being a homeowner, and after carefully shopping for your dream home, you find one that you would like to purchase at a cost of \$250,000. After researching banks

168. Algebra 2

how do i find out what the amplitude, period, h, k and midline of problems 1) y= sin (x-5)=7 2) y=3 cos (x- pie) -1 3) y= Sin3x+4 4) y= 1/2 cos 2x-2

169. Loop of Henle

What would happen to the concentration gradient in the tissues in the thick ascending limb loop of Henle if you used loop diuretics for too long? I know that if you use them K+ isnt being recycles and therefore theres no electropositive gradient being

what does flew out of gear like a Model-T Ford mean

171. algebra (parabolas)

find the axis of symmetry and vertex of the function. tell whether it goes upward or downward. y=3*xsquared+6x-2

172. early childhood ed

a childs observation of a parent writing a grocery list, his recognition of the coca cola logo, and his leafing through mailbox advertising literature exemplify. answers 1. cultural imprints 2. autonomous language 3. literacy events 4. mastery of

173. statistics

myself and 2 friends are a part of a group of 15 jurors. If 3 people are to be chosen, what is the probability that myself and my 2 friends are the last 3 people chosen?

174. To KK

I have removed all your posts (English and English 2) from overnight because of the incredibly objectionable content. Currently, you are also blocked from posting anything. If your posting privileges are restored, please make sure you do not post any type

175. austin community college

how many outcomes are there in an experiment consisting of rolling three dice followed by tossing a coinonce?

176. calculus

how do you separate this variable dy/dx=(x^2)/y given y=-5 and x=3

177. calculus

how do you separate this variable dy/dx=(x+1)/xy, x>0, y(1)=-4

178. mathematics trignometry

if sina, cosa, tana are in geometric progression then prove that cot^6a-cot^2a=1

179. math

I am having trouble with decimals. If i add 8+3+0.9+0.31=51 am i correct

180. Chemistry

all redox reactions involve 1.the gain of electrons only 2.the loss of electrons only 3.both the gain and the loss of electrons 4.neither the gain nor the loss of electrons 3, right?

181. Algebra

First, I really stink @ Algebra. How do combination of signed numbers work? I keeping getting 6 but for some reason I don't think its right. -1-(-6+-1) -1-6+1 -5+1=6

182. Accounting writen report

Why is it important for a business to prepare a monthly bank reconillation statement? state two points (b)what should the internal auditor do about this? Name two points

asked by Nelisiwe jili
183. chemistry

FeCI3(aq)t koh(aq) fe(oh)3(s) t kci(aq)

184. Psychology220

Write a 350- to 700-word response summarizing the three dimensions of love and how they interrelate to identify a specific type of love relationship. I have the fist part done but I am not really sure how to go about writing how they interrelate to

185. Physics

Two girls are at the same point on one side of a river that is 40m wide with a current flowing at 1.00m/s. Simultaneously, the dive into the water in an attempt to swim to the other bank of the river directly across from where they started. Both swim at

186. calculus

Complete the identity. sec(x)sin(x)/tan(x) - 1 = 0

187. MATH

Hello! I am trying to finish a math assignment. it was a bunch of math questions, and I am having a very difficult time with 5 of them. I have the answers to them though. Could somebody please help me with AT LEAST a few!? thanks!! 1) A square swimming

188. History Question

Which Constitutional Amendment is most important to you and why?

189. Math

Hi i was wondering what a rational number between 1.01001000100001 and 1.011011011011 would be. There are too many 1's that are confusing me haha. Thank you!

190. social studies

how did ancient texts and statues affect renaissance scholars?

191. Math

Mr. Thatch needs to buy tables and chairs for his office suite. Tables cost \$90 and chairs cost \$40. Mr. Thatch can spend no more than \$1,000. a. Write an inequality that expresses this situation in terms of the number of tables(t) purchased and the number

192. Chemistry

A certain shade of blue had a frequency of 1.01*10^-4 Hz. What is the energy of exactly one photon of this light?

193. calculus

find the derivative of f(x)=x^2sec^2(3x) also with g(x)=sqrt(cosxsecx) i get zero because cos and sec cancel each other out and derivative of a constant is zero... am i doing something wrong?

194. chemistry lab

if you find salicylic acid or acetic anhydride in your aspirin synthesis product why are they there? Where did they come from?

195. calculus

is the answer to find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3 is y=2x^2-1

196. Database Design (SQL)

I ned help creating a query that shows the number of days left before the end of the term. I need the following functions to accomplish this: CONCAT, DAYOFYEAR, NOW. So far I have this for my query: SELECT CONCAT('There are ',DAYOFYEAR(NOW()),'

197. English

I have to write a story in the perspective of a 2 year old and I need a plot for the story. Any suggestions?

198. Programming Logic

I need help creating a program to compare the value in input with the value in input. For example, if input is less than input print ‘input is less than input’; otherwise, print ‘input is not less than input’.

199. Programming Logic

I need help creating a program to display the integers from input through input. That is, if input contains 4 and input contains 8, the display 4,5,6,7,8 (on separate lines).

200. chemistry

John has three bottle of mineral acid but does not know which is which since he did not label the bottles before filling them. Suggest a method to which could be used to identify the acids.

201. physics

a very thin piece of copper wire has an electrical resistance of 20,000 Ohms. You connect its ends to a regular 2.0 Volt battery. How much power does it draw? Let's assume that this little piece of wire initially contained one trillion (that's a one with

202. physics

Muons are elementary particles that have a very short lifetime of about two millionth of a second (when at rest). They can be created in the upper atmosphere (at an altitude of say 10,000 meters) by cosmic rays, in which case they travel towards the

203. Chemistry

In a mixture of liquids,liquid A is steam volatile,and decomposes at its boiling point.explain the method of separating liquid A from the mixture,with physical principles involved.

204. chemistry

What are the main contaminants likely to be in your soap?

205. math

If there is a bench at first and every fourth sign after that.there is water at seconed sign and fifth after that. at which sign can i find both bench and water. my answer is i subtract 4-1=3 and i subtract5-2=3 i added 3+3=6,so ami correct to say that

206. Physics

Two cars crash into each other at an intersection on a very icy road. One 3,000 lb car is traveling 45 mph NW. The other, weighing 2,000 lb, is traveling 30 mph E. After the collision, their bumpers lock together. What is the velocity of the wreck as it

207. physics

Two pool balls of equall mass have a perfectly elastic headon collision.The fist ball is traveling at 2m/s and the second at 3m/s in the opposite direction.what are thier speeds immediately after impact? I'm lost on what equation to use here. Does the

What is the meaning of the simile flew out of gear like a Model-T Ford

209. algebra (parabolas)

tell whether the graph opens upward or downward. then find the axis of symmetry and vertex of the graph of the function 1. y=xsquared-5 2. y=-2*xsquared+6x+7

210. Accounting

What should the internal auditor do this? Name two point

211. science

why is it so important to have only one set of chemical symbols in the world?

212. Business Law 310

Week 3: Torts and Contract Law - You Decide Help Print This Page Scenario Scenario Summary The song “Happy Birthday to You” has universal appeal. Almost everyone knows its lyrics and melody, and it is sung to millions of people on a daily basis.

213. chemistry

What raw materials are used to make lithium ion batteries? How are the raw materials used in the batteries processed? What chemical equations take place in the battery?

214. calculus

if dy/dx=ycos x and y=3 when x=0, then y= ?

215. physics

A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s

216. statistics

I am raising guaramies and using different temperatures in 3 tanks to optimize breeding. Figure out at the 0.05 alpha if the breeds (treatments) are varying in production and determine at the same alpha if the temperature in the tanks (blocks ) are

217. statistics

In the City of Cleveland appraisals for taxes purposes is conducted every 4 years. The county assessor believed there was variance in the different people that were sent to perform the assessments. A test was developed to determine if there was difference

218. physics

A 9.000 kg ball has a speed of 16.0 m/s. What is its kinetic energy?

219. calculus

solve the initial value problem by separation of variables dy/dx=-x^2y^2, y(4)=4

220. trig

if sina,cosa,tana are in geometric progression then prove that cot^6a-cot^2a=1

221. History

Does any know how the American public felt about what happen to the Japanese American internment issues. I know how the American Japanese felt however I cannot find any express opinions of the American public.

222. algebra 116

the solution set for 9-24-64

223. math

DRAW a line l construct a line p such that lparallel ro p is at a distance of 3.5cm from l

224. Science

Need help with constructing a model of radioactive decay with popcorn kernals

225. English

Is it all right to say "he was anxious for me, but about my health? Thank you

226. Ancient World History

What is Daoism and confucius?

227. algebra

how do i solve. 3y-6+y+44=7y+40-5y

228. math

Decide whether the pair of lines is parallel, perpendicular or neither: 2x+3y=3 2x+3y=10

229. Algrebra 1

x2(squared)-12=-x solve by completing the square

230. English

Another quick question... "A Very Old Man with Enormous Wings" seems to be told in a third-person omniscient narrative, because we know the thoughts and feelings of all of the characters, with the EXCEPTION of the old man...is this still considered

231. chemistry

Why would you find ethanol or water during an aspirin lab?

232. chemistry

Why would you find ethanol or water during an aspirin lab?

233. Physics

Two equal mass cars collide head to tail and their bumpers lock. One car has a velocity of 10 m/s and the other is at rest. What is the velocity of the two cars after the collision?

234. Math

7/11 as a percent

235. Civics

The Governor can ___ and appoint state officers (article III) (North Carolina Contitution)

236. Chem

What is the percent by mass of a solution if 45 grams of acetic acid is added to 90 g of H2O? Thanks.

237. chemistry lab

what contaminant will be the one that most affects the pH of soap?

238. DOSAGE FORMS AND ROUTES OF ADMINISTRATION

On a job interview for a position as a pharmacy technician, the interviewer asks you what a dosage form of medication is. You respond that a dosage form is

239. Math157

I am having problems finding the correct way to solve this problem. I don't know the formula or even how to set it up. "Sam brought one of 250 tickets selling for \$2 in a game with a grand prize of \$400. Was \$2 a fair price to pay for a ticket to play this

240. English

Thank you very much for helping me! Your information was really of help can you say that?) Here is a paragraph I wrote on Dulce et Decorum Est by Owen. I know it is incomplete. I also need to find more data on the "War poets" and on this poem, too. Can you

241. physical science

what is the wave length

242. math

what is the prime factorization of 670 wrtten in exponent form

243. english

How to write an essay topic is based on the 2010 fifa world cup in s.a

244. Algebra

Of what percent of 320 is 180?

245. health science

hey can you please help me with this ?? what are the similarities and differences between mainstream and complementary health care practitioners? :)

246. ECONOMICS

What are three benefits for the economy of government's building and maintaining roads?

247. physics

5.15 g bullet at 886. m/s

248. algebra2

f(x)=3(x+18)(x-8)

249. MATHS

WHAT IS THE UNKNOWN LENGTH OF A TRIANGLE IF A=X+2,B=X+1,C=13

250. language and art

To travel to France from Egypt, you have to pass through which countries?

251. sydney

how would you solve this problem cos(theta)/2=1/6

252. physical scien ce

what is the wave length

253. Maths

Evaluate: f(x)=2x+1 (a) f(1) (b) f(-2) (c) f(1/2) (d) f(a+b)

254. Ancient World History

why is zoroaster the basis for modern religion?

255. Ancient World History

HOW DID THE GROWTH OF CITIES LEAD TO FORMATION OF GOVERNMENT? AND WHAT IS THE STONE AGE?

256. Human service

what is social contructionist perspective?

257. US History

Was Eisenhower right to request that Great Britian, France, and Israel end their attack on Egypt during the Suez crisis?

asked by Abby B.
258. chem

what temperature must be maintained in insure that a 1.00 L flask containing 0.04 moles of oxygen will show a continuous pressure of 745 mm Hg?

259. math

How do standards improve mathematics instruction

260. math

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

261. Programming Logic and Design

A program that accepts a plant's data and displays the results for a plant if it is appropriate for a shady or partially sunny yard with clay soil.

262. AU

What is probablity of 62 and probability of 59 with Mean of 60 and SD of 7

263. math: precal

How do I find the zeros of a polynomial function?

264. English

I visited the site you recommended to me. I just have a few mor doubts. I included a few more sentences whose vocabulary I'm not sure of. 1) The teacher was annoyed/cross with me for being late BUT she was annoyed/irritated by the heat/the elephant. 2) I

265. Database Design (SQL)

Hi I need help creating an SQL query to display each faculty member's last name, comma, first name as a CONCATenated element, then their salary as CONCATenated element with a dollar sign and comma. Then, the boss's last name, comma, first name as a

266. English

1) I find it difficult to describe activities people normally do when working on the computer (on "Microsoft Word", for example). Can you help me? (For example: I switch on the computer, then I click on the icon "word" and wait for it to open. I type in my

267. math

how do you divide 2.50 among 300 people

268. grammar

is it in my care or to my care

269. Math

Hi do the following sets have the same cardinality, why or why not? N= 1,2,3,4,5,6,7... N-2= blank, blank, 3,4,5,6,7... So basically the numbers from 3 to 7 match up in both sets, but in N-2 the first two are empty. I think they have the same cardinality

270. alg I

Yellow, green, and red chips are placed in a bag. The odds against pulling a green chip are 2/5. What is the probability of pulling a green chip?

271. calculus

if dy/dx=-3y and if y=1 when t=0, what is the value of t for which y=1/3

272. mythology

identify a scholarly article that discusses some aspect of the female divine in contemporary culture

273. Health

What is the difference between low and high blood pressure?

asked by Joe Schmo
274. English

Thank you. I just want to know if "She was anxiuous for me" is grammatically correct.

275. math

I have the numbers 6,9,13,15,22,38,and46 the mode is 13 am i correct

276. math

determine f'(2) for f(x)=g[h(x)] given g(2)=5, g'(2)=-3, g'(-6)=-3, h(2)=-6, h'(2)=4

277. Science

Jim has an aqarium that holds 4,000 mL of water. It is at the room's temerature of 20 degrees Celsius. How many calories need to be transferred to the water for it to reach 25 degrees Celsius?

278. science

How does a kiwi bird care for its young?