Questions Asked on
January 13, 2013

  1. AP Chem

    MnS(s) + 2 H+ --> Mn2+ + H2S(g) At 25 C the solubility product constant, Ksp, for MnS is 5 x 10-15 and the acid dissociation constants K1 and K2 for H2S are 1 x 10-7 and 1 x 10-13, respectively. What is the equilibrium constant for the reaction represented

    asked by AL
  2. space science?

    Which star is the densest: Antares, Spica, or Polaris?

    asked by Anonymous
  3. chemistry

    at 20 C the vapor pressure of dry ice is 56.5 atm. if 32 g of dry ice is placed in an evacuated .25 l chamber at a constant temperature of 20 C will all the dry ice sublime

    asked by david
  4. Physics

    Two forces are applied to a car in an effort to accelerate it, as shown below. The first force, F1 = 364 N, is applied at an angle α = 33° to the forward dashed line. The second force, F2 = 522 N, is applied at an angle β = 11° to the forward dashed

    asked by Davis Parker
  5. Physics

    According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Assume the speed quoted is that of the end of the rod. What is the centripetal

    asked by Emily
  6. maths

    One type of lubricating oil weighs approximately 52 pounds per cubic foot, or 7 pounds per gallon. A 42-gallon barrel will hold approximately how many cubic feet of such oil?

    asked by Anonymous
  7. Physics.

    A punter kicks a football at an angle of 45 degrees to the ground. The football has an initial velocity of 25 m/s, make a diagram and calculate: a) How long was the football in the air? b) How far does the football travel horizontally? c) What is the

    asked by Noemi
  8. Chemistry

    How do you write the chemical equation of the dissociation of nicotinic acid, C5H4NCOOH, in water?

    asked by Alisha
  9. chemistry

    Use the reaction shown to calculate the mass of iron that must be used to obtain 0.500 L of hydrogen at STP: 3Fe(s) + 4H2O(l) pr029-1.jpg Fe3O4(s) + 4H2(g

    asked by jason
  10. Chemistry

    Which of the following solutions would have the highest osmotic pressure? 0.15 M KCl 0.2 M C6H12O6 0.2 M C12H22O11 0.2 M CH3COOH 0.15 M CaCl2

    asked by Janet
  11. physics

    a red blood cell travels at a speed of 40 cm/s in a large artery. a sound with a frequency of 100 kHz enters a blood opposite the direction flow. calculate the frequency of sound reflected from the cell and detected by a receiver. (v = 1500 m/s)

    asked by aris
  12. science

    Can somebody write an acrostic poem for the ELEMENT mercury?? Thank you very much

    asked by leslie
  13. science

    list two things that car manufacturers do to improve a car's efficiency

    asked by max
  14. Geometry

    If m< JKN = 8x + 2 and m< MKL = 3x + 5, what is m< MKN? I know the answer but can you give an explanation

    asked by Zaria
  15. chemistry

    A chemist decomposes several samples of carbon monoxide into carbon and oxygen and weighs the resultant elements. The results are shown below: Sample Mass of Carbon Mass of Oxygen 1 6 8 2 12 16 3 18 24 Do you notice a pattern in these results? Next, the

    asked by patrick
  16. earth

    #37 whenever scientist carefully measure any quantity many times they expect that: a. all the measurements will be exactly the same b. only two of the measurements will be exactly the same c. all but one of the measurements will be exactly the same d. the

    asked by ?
  17. physics

    Suppose the charge q2 can be moved left or right along a line connecting charges q1 and q3. Given that q = +15 µC, find the distance from q1 where q2 experiences a net electrostatic force of zero? (The charges q1 and q3 are separated by a fixed distance

    asked by stoic-rider77
  18. math

    Zaineb is deciding whether to buy a stereo at $695 plus GST and PST now, or to invest the money to buy the stereo in a year. Her account pays 7.35% per annum, compounded monthly. If she can buy the stereo at the same price next year, how much would she

    asked by jessica
  19. Chemistry

    In planning to administer a gaseous anesthetic to a patient, a. Why must the anesthesiologist take into account the fact that during surgery the gaseous anesthetic is used both at room (18 degrees C) and the patient's body temperature (37 degrees C)? The

    asked by Sara
  20. physics

    Sound is passing perpendicularly through an open window whose dimensions are 1.1 m  0.75 m. The sound intensity level is 95 dB above the threshold of hearing. How much sound energy comes through the window in one hour?

    asked by not sure
  21. science

    you read about a rope and pulley machine that was able to produce equal amounts of output work. was this a realistic example why or why not?

    asked by ricardo
  22. Physics

    A coil of 50 turns has a cross-sectional area of 4.2x10^-3 m^2. It is placed at an angle to a uniform magnetic field of flux density 2.8 x 10^-2 T, so that the angle = 50degrees. What is the change in flux linkage when the coil is rotated anticlockwise

    asked by Amy
  23. physics

    A collision occurs between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.040 kg and is initially at rest. The collision is

    asked by Miranda
  24. AP Chem

    A valid Lewis structure of __________ cannot be drawn without violating the octet rule. Answer: BeH2 Why would BeH2 break the octet?

    asked by Anon
  25. Math Please Help

    A pizza box top with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections and folding up the sides. If the area of the base is to 144 in^2, what piece of cardboard should

    asked by Barb
  26. physics

    sphere A has a mass of 4.2*10^-2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is o.23 m from sphere A a) determine the angle between the thread and the wall

    asked by josh
  27. Medical Coding

    A 12-year-old boy presents with his father to the ER due to open wounds to his arm' hand, and upper leg. The injury occurred when the boy fell on a barbed-wire fence at the farm while running. Diagnosis: Multiple open wounds to the right forearm, right

    asked by Julie
  28. Physics

    In one cycle, an engine burning a mixture of air and methanol (methyl alcohol) absorbs 525 J and expels 413 J. How much work is done by this engine?

    asked by please help
  29. Python programming

    A standard problem in mathematics is to measure the area under a curve (or to integrate the function defining the curve). A simple way to do this is to approximate the area with a series of rectangles (whose areas are easy to compute). For example, we

    asked by Anonymous
  30. Chemistry

    The atomic number of an electrically neutral atom is equal to the number of: Choose all that apply. Neutrons Electrons Protons I chose Electrons but somehow my homework program is telling me it's wrong? I also tried checking all of them.

    asked by Kyle
  31. Social Studies

    "How was the free-trade trial of 1849 a victory for the Metis?" Was it because the 4 Metis offenders were given mercy and it also ended the HBC monopoly?

    asked by Sophie
  32. Math

    Mary is blowing up a birthday balloon.After the first breath, the balloon has a 5 cm diameter . the diameter increases at a constant rate of 20% each second. What is the diameter of the balloon after 3 seconds?

    asked by boobies
  33. Chem 2

    If we burn a strip of magnesium in air, there will be two main products, magnesium oxide and magnesium nitride. If we then treat that mixture with water, the nitride ion is converted to ammonia. After boiling away the water and ammonia, we would be left

    asked by Maggie
  34. physics

    A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 188.0 N at an angle of 26° with the horizontal. The box has a mass of 30 kg, and the coefficient of kinetic friction between the box and

    asked by Angel R.
  35. chemistry

    at 20 C the vapor pressure of dry ice is 56.5 atm. if 32 g of dry ice is placed in an evacuated .25 l chamber at a constant temperature of 20 C will all the dry ice sublime

    asked by david
  36. PHYSICS

    WHEN SIX PEOPLE WHOSE AVERAGE MASS IS 84 KG SIT DOWN IN A CAR, THEY FIND THAT THE CAR DROPS .84 CM LOWER ON ITS SPRINGS. THEN THEY HAVE GET OUT OF THE CAR AND BOUNCE IT UP AND DOWN. THE ACCELERATION OF GRAVITY IS 9.8 M/S^2. WHAT IS THE FREQUENCY OF THE

    asked by KOCHU
  37. maths-urgent

    Suppose a+4b+9c+16d+25e=-13, 4a+9b+16c +25d +36e =-8, 9a+16b+25c+36d+49e=3, Find the value of 16a+25b+36c+49d+64e=?

    asked by Anonymous
  38. physics

    In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) must be placed at the empty corner?

    asked by adam
  39. Physics

    When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied,

    asked by I'm going to die please help
  40. Geometry

    A triangular entraceway has walls with corner angles of 50, 70, 60. The designer wants to place a tall bronze sculpture on a round pedestal in a central location equidistant from the three walls. How can the designer find where to place the sculpture?

    asked by Anna
  41. AP Chemistry

    The principal quantum number of the electrons that are lost when tungsten forms a cation is ? Tungsten is a transition metal.

    asked by koolchem
  42. Physics

    A 1060 N crate is being pulled across a level floor by a force F of 300 N at an angle of 35° above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. Find the magnitude of the acceleration of the crate in m/s^2

    asked by Alyssa Thompson
  43. CHEMISTRY...

    1. Balance the reaction below, then use it to answer the following questions. C2H2(g)+O2(g)-->CO2(g)+H2O(l) a) How many grams of oxygen are needed to make 4.84 moles of water? Is the correct answer 387 grams of O2? b) How many grams of water will be

    asked by Anonymous
  44. AP Chemistry

    The Lewis structure of PF3 shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

    asked by Anon
  45. physics

    as light passes from air to water vi/vr=4/3 find the angle of incidence of a ray of light if the angle or refration is 25 degrees 40 minutes (i is the angle of incidence and r is the angle of refraction)

    asked by merri
  46. Pre-Calculus

    Point B is 12 km north of point A. Point C is 9 km from point B on a bearing of 060°. Find the distance from A to C.

    asked by Gabby
  47. Geometry

    An aircraft takes off and climbs at a constant 29 degree angle until it reaches and altitude of 6 miles. At that point, how far away is the plane from the airport?

    asked by Imani
  48. Chemistry

    at which temperature will water boil when the external pressure is 30 kPa?

    asked by Anonymous
  49. Principles of Finance

    Determine the size of the M1 money supply using the following information. Currency $700 billion Money market mutual funds $2,000 billion Demand deposits $300 billion Other checkable deposits $300 billion Traveler’s checks $10 billion

    asked by Jason
  50. Chemistry

    Solutions are made that contain 0.1 moles of each of the following compounds below in 100g of H20. Choose the compound whose solution will have the lowest freezing point? NaBr CO2 KClO3 MgCl2 MgSO4

    asked by Janet
  51. chem

    Which compound has a higher boiling point and why? a. PF3 b. PF5

    asked by Jim
  52. Physics

    A 4.2 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 1.5 kg of water is raised

    asked by I'm going to die please help
  53. AP Chemistry

    The principal quantum number of the electrons that are lost when tungsten forms a cation is ? Tungsten is a transition metal.

    asked by koolchem
  54. Machanics

    An electron moving at a speed of 5 multiply by 10 raise to power six m/s was shot through a sheet of paper which is 2.1 multiply by 4cm thick.the electron emerges from the paper with a speed of 2 multiply by 10 raise to power six m/s,find the time taken by

    asked by Anonymous
  55. Thermodynamic Physics

    When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied,

    asked by Kristal
  56. Chemistry

    If a sample of gas is cooled at a constant pressure until it shrinks to one-fourth its initial volume, what change in its kelvin temperature must have occurred?

    asked by Sara
  57. math

    A board is 244 inches long, is cut into pieces that are 7 5/8 inches long. How many pieces can be cut?

    asked by Debra
  58. chemistry

    which is more endothermic in water, ammonium chloride or potassium nitrate

    asked by kelly
  59. biochemistry

    A 20.0 mL sample of gastric juice was taken from a patient suspected of having hypochloridia (low stomach acid). The sample was taken several hours after a meal so there was no ingested food or drink, and it was assumed no buffers were present. The sample

    asked by stoic-rider77
  60. physics

    An athlete whirls a 6.6 kg hammer tied to the end of a 1.2 m chain in a horizontal circle. The hammer moves at the rate of 0.432 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain.

    asked by Emily
  61. Algebra

    Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of the number of nickels and the number of quarters is three times the number of dimes. If the total value of the coins is $4.60, how many of each kind does she have? I can't figure out

    asked by Sara
  62. Algebra

    Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of the number of nickels and the number of quarters is three times the number of dimes. If the total value of the coins is $4.60, how many of each kind does she have? I can't figure out

    asked by Sara
  63. science

    Suppose you put your lunch up on a shelf. Name two kinds of energy it has, and explain why. I think it would have potential energy because it has stored energy being off the ground, but what other energy?

    asked by maya
  64. physics

    A 33.1 g ring that appears to be silver is heated to a temperature of 77°C, and then placed in a calorimeter containing 5.00 10-2 kg of water at 24.0°C. The calorimeter is not perfectly insulated, however, so that 0.14 kJ of energy is transferred by heat

    asked by I'm going to die please help
  65. math

    Find the LCM: z^4-14z^3+49z^2,3z^2-147 and 5z+35

    asked by Zachary Gellman
  66. Chemistry

    Why is AgCl not soluble in nitric acid while Ag3PO4 is?

    asked by Syra
  67. history

    in what ways was the economy different in 1860 from what it had been in 1800? how would you explain those differences?

    asked by Anonymous
  68. Grenada

    John has a 25-gallon fish tank. John filled his tank today with 23-gallons of water. The water evaporates at a rate of 1.5 gallons per week. John adds 2 gallons to the tank every other week. At what following time will the tank contain 16.5 gallons?

    asked by Daryl
  69. physics

    A 3.40 kg block is pushed along the ceiling with an constant applied force of F = 82.0 N that acts at an angle θ = 50° with the horizontal. The block accelerates to the right at 5.80 m/s2. Determine the coefficient of kinetic friction between the block

    asked by Elli Johnson
  70. maths

    theatre sold the students tickets for Rs Rs3.25 and full price ticket Rs 5. on saturday 16 more fullprice ticket sold than student ticket .the total sales on that day was Rs 740. How many tickets sold ineach.

    asked by Anonymous
  71. earth

    #40 which type of rock is a result of a rock changing by heat and pressure? a. metamorphic rock b. igneous rock c. sedimentary rock d. metal ores

    asked by ?
  72. CHM

    As the number of solute particles in a given volume of solution increase will: freezing point increase, vapor press decrease? or vice versa or boiling point increase, vapor pressure decrease? or vice versa?

    asked by Thomas
  73. social studies

    2013 social studies fair project: A turn in history Walt Disney Pre-Draft Please

    asked by Frank
  74. Chemistry

    Why is AgCl not soluble in nitric acid while Ag3PO4 is?

    asked by Syra
  75. physics

    two forces of 5 N respectively act on an object.when will the resultant of the two vectors be at a maximum?

    asked by katlego
  76. AP Chemistry

    The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

    asked by koolchem
  77. GENERAL CHEMESTRY

    Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.

    asked by ROSE
  78. Physics

    When one gallon of gasoline is burned in a car engine, 1.20 108 J of internal energy is released. Suppose that 0.99 108 J of this energy flows directly into the surroundings (engine block and exhaust system) in the form of heat. If 5.0 105 J of work is

    asked by please help
  79. physics

    The masses of the earth and moon are 5.98 × 1024 and 7.35 × 1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on

    asked by Anonymous
  80. maths-urgent

    if xi 's are the mid points of the class interval of grouped data, fi 's are the corresponding frequinces and x^u is the mean, then (sum of) fi( xi-x^u) is?

    asked by Anonymous
  81. Physics

    A mass of 4.77 kg of chilled water at 0C is placed in a freezer which is kept at −19.2C. Approximately how much electric energy is needed to operate the compressor to cool this water to −19.2 C if the room temperature is maintained at 24.2C? The

    asked by physicshelp
  82. Chemistry

    H2O2 + Heat = H2O + O2 Would this be combustion or decomposition? Since the products are H2O and O2, I thought it would be combustion but then H2O can be decompose into H2O and O2 which would be decomposition.

    asked by Shadow
  83. social studies

    List three continents that are located in both the northern and western hemisphere?

    asked by Sandy
  84. chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 5.908×10−10 m. Determine the frequency (in hz) of the interacting photon.

    asked by ouut!
  85. math

    Solve for time. Principle - $400 / Int 5% / simple interest $100

    asked by Anonymous
  86. Physics

    A 4.90-kg ball, moving to the right at a velocity of +2.50 m/s on a frictionless table, collides head-on with a stationary 8.00-kg ball. Find the final velocities of the balls if the collision meet the following conditions. (a) elastic 4.9-kg ball = 8-kg

    asked by Miranda
  87. science

    Can somebody write an acrostic poem for the ELEMENT mercury?? Thank you very much

    asked by leslie
  88. math

    I ONLY HAVE ONES AND TENTHS DIGITS. I AM LESS TAHN 9. ONE OF MY DIGITS IS 3 MORE THAN THE OTHER. WHAT NUMBER AM I?

    asked by jericho
  89. Algebra

    Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of the number of nickels and the number of quarters is three times the number of dimes. If the total value of the coins is $4.60, how many of each kind does she have? I can't figure out

    asked by Sara
  90. physics

    A 200kg turtle running at a speed of .4m/s jumps onto a stationary skateboard that masses 3.6kg. the turtle slows to .2m/s by shooting the skateboard out from under him. how fast is the skateboard moving as a result?

    asked by felipe
  91. Ethics and the Administration of Justice

    Please Help!!!· In previous weeks, you examined the professional code of ethics for a field in criminal justice and analyzed ethical dilemmas for several fields. How does your code of ethics compare to the professional code of ethics? What are the

    asked by Everett Douglas
  92. math

    x=6y/5-8y-3y+9y,what is the value of y in terms of x ?

    asked by gary
  93. To Breanne

    I responded to that chocolate milk/ice problem. Here is a link to it. http://www.jiskha.com/display.cgi?id=1357962576#1357962576.1358029768

    asked by DrBob222
  94. history

    did the industrial and market revolutions make america a more or less republican society? how so?

    asked by Anonymous
  95. math

    Kerry Stutsman has $500 in a saving account earning .45% interest. She is considering buying a 1-year certificate of deposit (CD) that pays 3.25% interest. What will be the annual difference in her interest earnings between the savings account and the CD?

    asked by Anonymous
  96. algebra

    1.2X 10log6 by 1/16=

    asked by Cameron
  97. Math

    Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

    asked by Abhishek
  98. chemistry

    In the previous example, how many ml of 0.1M KMN04 are required to react with 30ml of 0.05M H2o2? The answer 3ml who helps

    asked by Fai
  99. math

    Describe how the slope of a line relates to a trend line.

    asked by carly
  100. Analytic Geometry

    A point is equidistant from (-2,4) and (3,5). It is also equidistant from (-2,-3) and (6,-1). Find the point Please I need Help with this

    asked by Lance
  101. Chemistry

    I need to write the total ionic equation for this equation. Copper(ii)sulfate + iron = iron(iii)+ copper. Won't it be Cu2+ + SO4-2 + Fe = Fe3+ + Cu ? The answer key say 3Cu2+ + 3SO4-2 + 2Fe = 2Fe3+ + 3SO4-2 + 3Cu Where did they get the sulfate for the

    asked by Shadow
  102. Chemistry

    Let say you were given this equation: NiBr2 + Co = Ni + CoBr2 How can you tell which is liquid,gas,solid,aqueous? Do you just use what you know and figure it out? Like since NiBr2 can be broken down because of the solubility rule, you can assume it aq then

    asked by Shadow
  103. chemistry

    – (b) Which are likely to have much lower critical micelle concentrations? (c) Which ... (e) You wish to use a solution of this surfactant in water to dissolve oil. Which region will be required to do this? (f) How much oil will dissolve in the

    asked by Anonymous
  104. Math

    Explain it How can you use a pattern to find the product of 5x12?

    asked by Shaun
  105. Algebra

    Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of the number of nickels and the number of quarters is three times the number of dimes. If the total value of the coins is $4.60, how many of each kind does she have? I can't figure out

    asked by Sara
  106. algebra

    an investor invested a total of $2100 in two mutal funds. one fund earned a 9% profit while the other earned a 7% profit.if the total profit was $161 how much was invested in each fund

    asked by nic
  107. Earth Science

    1. What are one internal and one external source of energy in the Earth system? 2. Earth scientists assume that the causes of natural events of phenomena can be discovered through... 3. Science constantly creates new technology. Does this new technology

    asked by Emma
  108. Math 9

    use exponent rules to simplify. Write as a single power, don't need to find the value. [ (11/20)^4 x (11/20)^-8]^5 and (11/20)^-6 you cant leave an number to the power of a negative exponent. You have to change it like this ex : 2^-3 = 1/2^3 = 1/8

    asked by Molly
  109. physics

    Two pieces of metal (A and B) are identical in every way, except that A has a much larger thermal expansion coefficient. If equal amounts of heat are added to both pieces of metal, which metal does more work on its surroundings? 1. A 2. B 3. They do the

    asked by physicshelp
  110. physics

    a block of ice released from rest at top of 400 m long ramp slides to the bottom in 2.20 seconds. what is the angle between the ramp and the horizontal

    asked by flay
  111. put was or were in the space

    Tom and Ben ( ) playing

    asked by grammar
  112. physics

    A 1.62 kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 0.986 m, and the string can support a mass of 32.5 kg before breaking. The acceleration of gravity is 9.8 m/s 2 . What maximum speed can the

    asked by Emily
  113. Math

    A single card is drawn from a deck. Find the probability of selecting a 10 or a diamond.

    asked by David
  114. accounting

    a tabular analysis of the transactions made during august 2010 by witten company during its first month of operations is shown below each increase and decrease in stockholders' equity is explained.

    asked by virginia
  115. physics

    1. What are the examples of supersonic waves? 2. What is match cone, match no? 3. Define echo? 4. What is the effect of frequency on the velocity of sound in a gas? 5. Mathematical expression of beats. ''based on wave motion''

    asked by edward
  116. earth

    #10 which of the following is an effect of divergent plate movement? a.) glacial activity b.) mountain building d.) canyon erosion e.) sea floor spreading

    asked by ?
  117. Math

    Tom planted 81 plants in his garden at a total cost of $21.85. The 81 plants consisted of peppers at 20 cents each tomatoes at 35 cents each and eggplants at 30 cents each. If the total number of peppers and tomatoes was only half the number of eggplants,

    asked by Kim
  118. math

    invest 5% compounded semiannually I want to have 23,000 in the future how much I will deposit now to have that amount 5 years from now

    asked by max
  119. Physics

    A satellite moves in a circular orbit around the Earth at a speed of 5.4 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. The value of the

    asked by Emily
  120. AP Chemistry

    The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

    asked by koolchem
  121. enc1101

    Correcting run-on sentences 1. I had the opening part, I remember it like it was yesterday ”good afternoon everyone and welcome to the productions of ”What's the Meaning of Life”.” 2. I looked down at my costume and I love my little tutu my mom

    asked by ally
  122. physics

    A Hot Wheels car rolls off a table at a speed of 2.36 m/s and hits the floor a distance of 95.1 cm from the table's edge. Determine the height (in cm) of the table.

    asked by Anonymous
  123. math

    Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20

    asked by Larry
  124. Liberal arts math

    if this is the eaquation of a line y=2x+3 what is the parallel line and perpendicular line?

    asked by Sarah
  125. physics

    You kick a .3kg soccer ball at a 30deg. angle. your toe provides an average force of 50N for .5m. How far does the ball go?

    asked by jim
  126. math

    Jim spoke on the phone with all his friends last weekend.On Saturday he spoke for 3/8 of an hour and on Sunday he spoke for half an hour. During that time spent, he spoke to liam for 1/8 of an hour .What fraction of the time Jim spent talking with his

    asked by jerry
  127. Chemistry

    What is Mass % of an aqueous NaOH solution in which molality of NaOH is 16.7m? Density of the solution is 1.4339g/ml

    asked by Janet
  128. CHM

    Calculate the molecular weight of a small protein if a 0.32 g sample dissolved in 161 mL of H2O has an osmotic pressure of 9.0 mmHg at 25 degree celcius. (R=0.0821 L X atm/K X mol)

    asked by Robby
  129. chemistry

    How much oil will dissolve in the surfactant-water solution if the concentration of surfactant falls in region A?

    asked by Anonymous
  130. Algebra

    Factor the GCF out of 5x2 - 10x? I know I need to find the GCF of the coefficients but I need to write it using the distributive property. Help please?

    asked by Bob
  131. chemistry

    calculate the molarity of H2O2 if 25ml of H2O2 required 12 ml of 0.1M KMN04? The right answer 0.24M who helps

    asked by Fai
  132. physicssss

    Six grams of water changes from liquid to vapor at a pressure of one atmosphere. In the process, the volume changes from 1.3 cm3 to 2393 cm3. The latent heat of vaporization of water is 2.26 × 106 J/kg. Find the work done. Answer in units of J Find the

    asked by physicshelp
  133. Differential Equations!

    I'm struggling solving this separable differential equations: (du/dv) = ((uv+u)/(uv+v)) I multiplied both sides by dv to get on the left side just du and cancel out dv, but after that don't know where to go. I've tried integration by parts but it doesn't

    asked by Massiel
  134. Chemistry

    I need to write the equation for the neutralization reaction of NaOH and nicotinic acid (C5H4NCOOH). Here is my attempt: C5H4NCOOH + NaOH → C5H4NCOONa + H2O First of all, is the formula for nicotinic acid correct? I am finding mixed answers when I search

    asked by Alisha
  135. Math--Please Help

    A pizza box with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections folding up the sides. If the area of the base is to be 144 in^2, what size piece of cardboard should

    asked by Barb
  136. math

    Solve for time. Principle - $400 / Int 5% / simple interest $100

    asked by Anonymous
  137. chemistry

    The vacancy fraction of a particular metal is found to double as the temperature of the metal is increased from 700 degrees C to 850 degrees C. Calculate the enthalpy of vacancy formation for this metal. Express your answer in units of eV.

    asked by jhony
  138. physics

    A box slides down a 26° ramp with an acceleration of 1.19 m/s2. Determine the coefficient of kinetic friction between the box and the ramp. μk =

    asked by Davis Parker
  139. science

    1.2X 10log6 by 1/16=

    asked by Cameron
  140. Python programming

    Consider the following class definition: class Frob(object): def __init__(self, name): self.name = name self.before = None self.after = None def setBefore(self, before): self.before = before def setAfter(self, after): self.after = after def

    asked by Anonymous
  141. Anthroplpogy

    Political integration is common in chiefdoms. common in band societies. common in tribal societies. rare in commercial societies.

    asked by Anonymous
  142. earth science

    #16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density

    asked by ?
  143. Python programming

    1,000 students took an online course. 1/4th of them were from Africa, 1/4th from Europe , 1/4th from South America, and 1/4th from Asia. At the end of the course, the instructor observed that of the top 100 grades, 30 belonged to students from a single

    asked by Anonymous
  144. health

    The ________the concentration of HIV in semen or genital fluids, the more likely it is that HIV will be transmitted to a sex partner. A. Lower B. Weaker C. Higher D. All of the above

    asked by sam
  145. earth science

    #25 seismic waves are similar to sound waves because_______ a/ both are produced by vibrations b/ both are caused by humans c/ they are both produced by radiation d/ seismic waves and sound waves are not similar in any way

    asked by ?
  146. earth science

    #26 An inference is_____ A" using your sense to gather data B" a conclusion mad based on data C" a prediction about the results of an experiment D" a persons feeling or judgment about something

    asked by ?
  147. earth science

    which of the following element are found in the Earths crust? iron oxygen calcium all of the above

    asked by ?
  148. Chemistry

    How many moles are 400 g of Ca(HSO4)2

    asked by Len
  149. math

    Which is greater? $5.00 or the total value of all combinations of three coins you can make using only pennies, nickels, dimes, and quarters?

    asked by Michael
  150. put was or were in the space

    The girl has or have

    asked by grammar
  151. earth science

    #31 strike slips faults are most likely to occur along which type of plate boundary? a. convergent b. transform c. transcontinental d. divergent

    asked by ?
  152. Biology

    What will happen to the enzyme activity if both competetive and non-competetive inhibitors appear at the same time together with substrates in a reaction? Which inhibitor will affect the rate of the reaction in more?

    asked by Mengistu
  153. linear equations

    theatre sold the students tickets for Rs Rs3.25 and full price ticket Rs 5. on saturday 16 more fullprice ticket sold than student ticket .the total sales on that day was Rs 740. How many tickets sold ineach.

    asked by mala
  154. Biology

    What will happen to the enzyme activity if both competetive and non-competetive inhibitors appear at the same time together with substrates in a reaction? Which inhibitor will affect the rate of the reaction in more?

    asked by Mengistu
  155. earth science

    #33 When conducting an experiment that deals with boiling chemicals, which of the following pieces of equipment would be most important to protect you from being injured? a. fire blanket b. eye wash c. tongs d. goggles I cant decide between c and d because

    asked by ?
  156. MATH!!!

    how do I do 2(3g+2)=1/2(12g+8) ? is it possible?

    asked by Emi
  157. social studies

    what are the three examples of new campaining practices that resulted from the election of 1828

    asked by jovanny
  158. Math

    Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

    asked by Abhishek
  159. chemistry

    A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 1.828×10−10 m. Determine the frequency (in hz) of the interacting photon.

    asked by ani
  160. Analytic Geometry

    A point is equidistant from (-2,4) and (3,5). It is also equidistant from (-2,-3) and (6,-1). Find the point Please I need Help with this

    asked by Lance
  161. chemistry

    (b) If the diffusivity is observed to double when the temperature is increased by 10 degrees C, what is the activation energy for diffusion? Express your answer in units of eV.

    asked by hr
  162. earth

    #11 The state fossil of Nevada is the "Ichthyosaur", a dinosaur that lived in salt water. Why are so many of these fossils found in Nevada? a)lake mead once covered most of Nevada b)Nevada was once covered by oceans c)Ichthyosaur left the water to die

    asked by ?
  163. math (urgent!)

    I was given a graph and told to find an equation for the temperature T in terms of the time t in the form T(t) = a sin(kt-c)+d where a, k, c and d are constants. The max was 32.9 and the min 21.1 I determined that amplitude = 5.9 vertical = 27 period =

    asked by Anonymous
  164. CHEMISTRY

    (a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of

    asked by ani
  165. algebra

    Andrea caught seven more fish than Micah. Micah caught twice as many as Peter. If they caught a total of 37 fish, how may did each catch?

    asked by Wilton
  166. maths

    rewrite the addition sum given below using digits. Each letter is used for a different digit. Answer the questions given below i) Which digit did you find first? ii) How did you find R and U? ........F.O.U.R ...........O.N.E ....T.H.R.E.E ....T.H.R.E.E

    asked by manpreet
  167. Chemistry

    Assume that the LHMP is enclosed in a transparent polymer stucture. a. How will the gases inside LHMP be affected by hot days and cool nights? b. What design features might be incorporated in the LHMP to reduce those heating and cooling effects? I know

    asked by Sara
  168. chemistry

    In the previous example, how many ml of 0.1M KMN04 are required to react with 30ml of 0.05M H202? The answer 3ml Who helps

    asked by Fai
  169. math

    The lengths of two sides of a parallelogram are 3 are 5. which of the following is a possible value for the length of a diagonal of the parallelogram? a.2 b.2 c.8 d.10 e.15

    asked by john
  170. math

    If one side of a triangle is of length x and another side is of length x+6,which of the following could not be the lenght of the third side? a.5 b.7 c.9 d.11 e.13

    asked by john
  171. Physics

    A dog is tugging forward on a leas held by a physics student who is standing still. The dog is tugging with a force of 63N. The student estimates the leash to be at an angle of 25 degrees above the ground. What is the tension in the leash?

    asked by Randy
  172. Comprehension/reading

    Dialogue: The new journalist is no longer deciding what the public should know. She is helping audiences make order out of it. This does not mean simply adding interpretation or analysis to news reporting. The first task of the new journalist/sense maker,

    asked by Blaze
  173. science

    you read about a rope and pulley machine that was able to produce equal amounts of output work. was this a realistic example why or why not?

    asked by ricardo
  174. chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 887.0 kg of PbS and 1330 kg of PbO.

    asked by please check my ans.(744.18 hour)....
  175. math

    If x=y+|-4|-|-5|+6,what is the value of y in terms of x?

    asked by gary
  176. math

    If x=y3-80,what is the value of y in terms of x ?

    asked by gary
  177. MATH!!!

    how do I do 3(d+12)=8-4d ? Please! need help!!!!

    asked by Emi
  178. Science

    What are functions of the pharynx, colon, caecum in a digestive system of a pig?

    asked by Juanita
  179. Math

    Howmany times do u multiply

    asked by Sat
  180. MATH!!!

    How do I do w-3=w-6 ? Is it possible?

    asked by Emi
  181. Math

    simplify by factors of 1: 1280v^6y^9/100v^3y^5

    asked by Zachary Gellman
  182. math

    If x=5y+2-3(y+2),what is the value of y in terms of x ?

    asked by gary
  183. physics

    A weightlifter is bench-pressing 65kg. if at full extension the weight is .7m above his chest, then how much has he done after 10 repetitions (given that he simply lets the weights fall back down) if it takes 15 seconds?

    asked by jona
  184. History

    1.What was the new deal's legacy? 2. new measures were taken during the new deal and what agencies were formed?

    asked by Alexander
  185. Mechanics

    If a car moving at 180km/h redues to 72km,what is the percentage change in kinetic energy.

    asked by Ayinde
  186. College Algebra

    I need help factoring a problem and cant seem to get it right. The one I'm stumped on is 2x^2+7x+2. I have to compute as indicated and write final in the lowest terms. The whole problem is x^2-7x-18/x^2-6x-27*2x^2+7x+2/2x^2+5x+2

    asked by Kristen
  187. math

    my tens digit is 3 less than my hundredths digit. The difference between my tenths and hundredths digit is 5. The sum of my digits is 10. What number am I?

    asked by jericho
  188. Pre-calculus

    Find the correct end behavior for a given polynomial function. 3.36x^4+8x^2+x-9

    asked by Wilson
  189. Physics

    How would I determine the height of a mountain if I am given direction cosines of vectors from two points on the base of the mountain to the peak?

    asked by Briana
  190. us history

    I am making a Civil War newspaper and had to pick 5 topics from a list. The problem I am having is what year to put on my paper, I first was putting June 1863, but then realized some of the events have taken place throughout the Civil War. What is the

    asked by Fort
  191. history

    a distinct american identity had begun to emerge by 1820. how would you desccribe this identity? What were the forces that helped create unity? And what were the points of contention?

    asked by Anonymous
  192. Chemistry

    I have all of the answers but this one so if anyone knows this answer, i can trade you :) I tried using the formulas that were posted but i ended up with a weird answer that didn't work.... A photon interacts with a ground state electron in a hydrogen atom

    asked by Chemistry
  193. math

    a cylindrical tank with diameter 2.0m and height 3.2m is to be filled with water. how many litres of water are needed to fill the tank? 100cm3 = 1L

    asked by laf
  194. history

    what was the impact of the economic revolution on the lives of women in various social groups

    asked by Anonymous
  195. Social Studies

    I've thought about this question for a long time and done some research but I still can't decide. Could someone please give me their opinions? "Was conflict over the Red River Settlement inevitable?" Thanks!

    asked by Charlotte
  196. english poem

    plz can anyone check my poem and mark my correct my mistakes. Lasts Forever once aparted, never met again never saw the wound heeling again once desired, beyond dreams no one i saw blessed anymore once hurtled, smashed from the roots never saw a tree

    asked by Riana
  197. Python Programming

    We have created a set of data values that sample a function y(x). The sample points are stored in two arrays: xVals and yVals. These represent measurements of a physical process that is subject to noise so that if a is the i'th entry of xVals (i.e. a =

    asked by Anonymous
  198. math

    5(3x+2)+2(3x+2)

    asked by andrea
  199. Math

    Simplify the rational expression 2x^3-x^2-6x ➗2x^2-7x+6 Pls show steps I want to understand thank u!

    asked by Lady gaga
  200. math

    I have a board 18" x 18" x 1/8" I need to support it in an upright position at a 15 degree angle. How big must the base of support be to keep it from falling over.

    asked by Anna
  201. Chemistry

    In a distillation column, is it possible to achieve 100% or complete separation of the components (assuming they do not form azeotrope)?

    asked by Namie
  202. midterm review scavenger hunt funsheet

    water moves in bursts

    asked by sasha
  203. balaji pharmacy clg ,science

    why it is taken 85ml of hcl for 1 lt of solvent according to I.P. while it is 43.02ml of hcl when it is calculated?

    asked by shaziya
  204. Math--Please Help

    A pizza bx with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch square from the corners and the middle sections and folding up the sides. If the area of the base is to be 144 in^2, what size piece of cardboard should

    asked by Barb
  205. balaji pharmacy clg ,science

    why it is taken 85ml of hcl for 1 lt of solvent according to I.P. while it is 43.02ml of hcl when it is calculated?

    asked by shaziya
  206. chemistry

    What is the molarity of an HCl solution if 38.5 mL of it is titrated to the equivalence point with 41.6 mL of a 1.41 M NaOH solution?

    asked by Megan
  207. Math

    Plz cud sombdy show me long division method of x^4/(x-1)(x^2+1)???? Plz note (x-1)(x^2+1) is in the denominator.

    asked by Abhishek
  208. Chemistry

    Name this compound: H2O2

    asked by Anonymous
  209. earth

    #39 magma is a result of what process? a. cementation b. crystallization c. melting d. metamorphism

    asked by ?
  210. Hard math

    2x^3-x^2-6x __________ 2x^2-7x+6

    asked by James
  211. chemistry

    The silicon wafer is coated with a layer of metallic aluminum which acts as an electrical contact. The x-ray diffraction pattern of aluminum is measured in a diffractometer with Fe k alpha radiation. At what angle,a , do you expect to observe the first

    asked by hr
  212. physics

    what is the refrevtion of waves? And what are the laws'of refraction? Also about phase change.

    asked by edward
  213. earth

    #15 The primary cause of crustal movement is_________ a.) conduction b.) convection c.) magnetism d.) radiation please help have no idea

    asked by ?
  214. earth

    #16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density

    asked by ?
  215. Remainder Theorem

    Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the remainder is -2. Find a and b. (4 marks)

    asked by Anonymous
  216. Math help pls

    X^-2 - Y^-2 __________ X^-1 + Y-1

    asked by Joanne
  217. earth

    #25 seismic waves are similar to sound waves because_______ a/ both are produced by vibrations b/ both are caused by humans c/ they are both produced by radiation d/ seismic waves and sound waves are not similar in any way

    asked by ?
  218. math

    1. x=3y-2/4,what is the value of y in terms of x ? 2. x=y^3/3y^2+y/2,what is the value of y in terms of x ?

    asked by gary
  219. Physics

    Stand two plane mirrors on their edges and parallel to one another. Place a coin between them near one end. How many images do you see? Draw a ray diagram to explain the formation of the images.

    asked by Lisa
  220. Physics

    Stand two plane mirrors on their edges and parallel to one another. Place a coin between them near one end. How many images do you see? Draw a ray diagram to explain the formation of the images.

    asked by Lisa
  221. Physics

    A car with a mass of 1815 kg is traveling down a road for 50 meters. It takes the car five seconds to travel this distance. Calculate the velocity, momentum, and kinetic energy of the car.

    asked by Eliza
  222. physics

    Given three vectors a~=Ài~À4j~+2k~ , b~=3i~+2j~À2k~ , c~=2i~À3j~+k~ , calculate a~Á(b~c~)

    asked by Anonymous
  223. Math

    The height from the ground to the top of a tire on a chold's bike is 42 cm. What's the distance the bike travels for one revolution of the tire?

    asked by Me(:
  224. economics

    Mary earns $100/day at a flower shop. She will take 2 days off without pay to attend an out of town wedding. Transportation will cost $180 round trip. Hotel $99/day for 2 nights. What is the opprotunity cost?

    asked by d
  225. maths

    How many minutes before 1:00 pm was 88minutes ago 3 times the minutes after 10:00 am

    asked by Anonymous
  226. Physics

    What will happen if you try to place two bar magnets of exactly equal size one above the other such that their north poles are on the same side

    asked by vishnu
  227. AP Chemistry

    The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

    asked by koolchem
  228. earth

    #33 When conducting an experiment that deals with boiling chemicals, which of the following pieces of equipment would be most important to protect you from being injured? a. fire blanket b. eye wash c. tongs d. goggles I cant decide between c and d because

    asked by ?
  229. algebra

    Hi I need a formula for the following word problem. The cost of a cellphone has increased by 400% over 10 years. Does this correspond to a decrease of 4 times its cost?

    asked by Babs
  230. maths

    35 +29=8x

    asked by jillyann
  231. Math

    2x^3-x^2-6x / 2x^2-7x+6

    asked by Justin
  232. government

    What does this statement means? He believed that political liberty threatened the efficiency of the stare with anarchy.

    asked by Lucy
  233. math

    what 2 numbers has a sum of 15 and a product of 56

    asked by che
  234. Physics

    The crate, m=68kg, is pushed up an incline, θ=24degrees, at a constant velocity with Fp=500N. μk=?

    asked by Charlie
  235. Information Technology

    Write a C program computing the interest of $100 invested at different rates of interest.

    asked by Nia
  236. chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 887.0 kg of PbS and 1330 kg of PbO.

    asked by pls check it..urgent(limiting reagent)
  237. algebra and trigonometry

    Where can I find a complete drawing of the unit circle

    asked by Anonymous
  238. maths-urgent

    rewrite the addition sum given below using digits. Each letter is used for a different digit. Answer the questions given below i) Which digit did you find first? ii) How did you find R and U? ........F.O.U.R ...........O.N.E ....T.H.R.E.E ....T.H.R.E.E

    asked by manpreet
  239. math

    Base is 16 cm squared, Width is 2.5 cm. what is the perimeter and height

    asked by donna
  240. Maths

    1) In a sale a coat costing £45.90 is reduced by 35%. What is the new cost of the coat? How much was saved in the sale?

    asked by Israa
  241. Science

    Could anyone link or tell me why does oxygen ignite at high temperature? Thanks

    asked by Shadow
  242. Drivers Ed?

    I just got my driving book, and I want to know... All this stuff about the different classes of licenses...is that something I'll need to know for the written test? Because its making no sense to me.

    asked by Michael
  243. Math

    What factors will give a product of 42? Show your work with repeated addition and with equal groups

    asked by Nick
  244. Math

    howmany?

    asked by math
  245. Chem 2

    What are some precipitates that affect our bodies

    asked by Cassidy
  246. anthropology

    States have of all of the following except

    asked by Anonymous
  247. Physics

    I just have a question....How to know if the volt is -ve or not? and How to know if a charge has deficit or excess electrons ?

    asked by Jiskha
  248. pre algebra

    hi i need some help

    asked by john
  249. Mary

    Can someone please tell me the heat of fusion for Lauric Acid, Oxalic Acid, and Cetyl Alcohol? I've looked and can't find them anywhere! Thanks!

    asked by Chemistry
  250. chemistry

    What is the kd of ethanoic acid between isobitanol and water?

    asked by cyprian
  251. MATH!!!

    is w+3=w+6 possible? I don't know how to do this...

    asked by Emi
  252. math

    steve, i still have two question I don't understand. 1. x=3y-2/4,what is the value of y in terms of x ? 2. x=y^3/3y^2+y/2,what is the value of y in terms of x ?

    asked by gary
  253. math

    steve, i still have two question I don't understand. 1. x=3y-2/4,what is the value of y in terms of x ? 2. x=y^3/3y^2+y/2,what is the value of y in terms of x ?

    asked by gary
  254. chamistry

    The vacancy fraction of a particular metal is found to double as the temperature of the metal is increased from 700 degrees C to 850 degrees C. Calculate the enthalpy of vacancy formation for this metal. Express your answer in units of eV.

    asked by jhony
  255. Math high school

    Find the slope of altitude to line AT the coordinates are A(-7,0) and T (9,-7)

    asked by Sue
  256. Math

    Please factor 2x^2-xy-y^2 Briefly explain steps

    asked by Justin