1. physics

    A system does 137 J of work on its environment and gains 95.3 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment
  2. physics

    A rock is dropped from bridge to the water below. It take 2.4s to hit water fid the final speed of the rock when it hits the water. How high is the bridge above water
  3. Math

    800cm3 of water is poured into an inverted right conical vessel and the water level is 6cm. How much more water has to be added to the vessel such that the water level becomes 9cm?
  4. Math

    True or false, A solution of a system of linear equations is an ordered pair that satisfies one of the equations in the system?
  5. Law

    What is one way the US legal system affect US businesses. How do specific aspects of the US legal system contribute to furthering commerce
  6. algebra ll

    solve the system of equations 4x - 3y= 8 2x+ 5y= 9 mutiple choices are (1,1), (5,2) 1(-4,-10) or (2,-2)and choose the correct description of the system of equations. 2x+3y=10 and 4x+6y equals 20 thank you for the help
  7. Math

    I cannot come up with the right answers for my matrix. I need to write as a system of equation and solve the system. 1 2 3 x 1 1 1 1 y = 12 -1 1 2 z 2 The answers I come up with are 31 15 15 when I check these, they will not work, what I am doing wrong?
  8. social studies

    Why should a political system be unitary, federal, or confederal? If the U.S. were to have another constitutional convention, would we keep a federal system or change it? Why or why not?
  9. Math

    why is the Cartesian Coordinate System unique? The system is unique because it's concept of using a pair of axes in a three dimensional format
  10. Informaton Technology

    Explain how each of the following contributes to the overall performance of a computer system and mentioned how it is done. (a) System optimisation (b) Component optimisation
  11. math plz help

    Explain what the Metric System is. Also find the year the metric system was invented and the country where it happened
  12. American Government

    Why should a political system be unitary, federal, or confederal? If the U.S. were to have another constitutional convention, would we keep a federal system or change it?
  13. Calculus

    An inverted conical tank is being filled with water, but it is discovered that it is also leaking water at the same time. The tank is 6 meters high and its diameter at the top is 4 meters. The water is being added to the tank at a constant rate. Some of
  14. Chemistry (Mass/volume)

    What are factors that will contribute to achieving the lowest mass/volume ratio possible for an airbag? The "mass" includes the mass of the reactants, bag, and any additional materials you would use to make the airbag. The "volume" is of the inflated air
  15. area/length/volume

    How are length, area, and volume related in terms of the three dimensions of space? and How is it possible for objects of the same volume to have different masses? #2 Gads! Think of a cup full of steel marbles and a cup full of cotton balls. ummm, ?
  16. chemistry

    The reaction SO2 + H2O =H2SO4 Is the last step in the commercial production of sulfuric acid . the enthalpy change for this reaction is -227 KJ . In designing a sulfuric acid plant is it necessary to provide for heating or cooling of the reaction mixture ?
  17. Chemistry

    You take 2 liters of water at 20 degrees Celsius and remove heat at 200W from it for 5 min. What is the temperature and state of the water after the experiment? Some properties of water: Heat of fusion: 333.55 kJ/kg, Heat of vaporization: 2257 kJ/kg, Heat
  18. Calculus

    A water trough is 6 m long, and its cross-section has the shape of an isosceles trapezoid that is 20 cm wide at the bottom, 50 cm wide at the top and 40 cm high. If the trough is being filled with water at the rate of 0.2 cubic meters/min, how fast is the
  19. PHYSICS

    The latent heat of fusion of water is 3.34 x 105 J/kg. A farmer places a barrel containing 1000 kg of water in his barn one winter's night. When the water cools to 0oC, it begin to freeze. How much heat does the water give out while it is freezing until it
  20. physics101

    Nd/Na = -V.g.hd(beta-beta1)/KT NdNa: No of particules(mole) V: Volume g: gravitational acceleration hd: distance beta: densities(mass/volume) k: Boltzman constant (joules/kelvin) T: absolute temperature(kelvin) volume = L3 gravitational acceleration L/T2
  21. physics

    Nd/Na = -V.g.hd(beta-beta1)/KT NdNa: No of particules(mole) V: Volume g: gravitational acceleration hd: distance beta: densities(mass/volume) k: Boltzman constant (joules/kelvin) T: absolute temperature(kelvin) volume = L3 gravitational acceleration L/T2
  22. Computer Sciene-java

    Write a loop that will continuously prompt the user for integers to sum, -1 to exit. Sum these values and display the sum to the console. Here is what I have so far, but I feel like I am missing something: public class Sum1 { public static void main
  23. Physics

    9. In which system is heat usually transferred from the cooler part to the warmer part? a. A stove as it heats up water. b. A refrigerator that is running. c. An electric fan that is running. d. None of the above, because it is impossible to transfer heat
  24. history

    When were children required to go to school in Wisconsin? 1879. more info can be found @ infoplease. can you tell me what you typed in the search engine? I Googled compulsory education Wisconsin and found this site -- which confirms the date as 1879.
  25. Math

    A wildlife biologist in Nova Scotia is testing the pH of stream water. She hopes that the pH of the water is greater than 5.5 so that Atlantic Salmon returning this year to their natal streams will be able to reproduce. The hydrogen ion concentration of
  26. Environmental Science

    Which of the following is one way that a person can conserve water? a.Take a bath instead of a shower b.Wash laundry in small, partial loads c.use a low flow shower head to take short showers d.water the lawn daily and at nidday. I picked a. right? Because
  27. Chemistry-DrBob222

    What is the final temperature and physical state if water when 47.50 kJ of energy is added to 15.0 g of ice at -10.0 C? Helpful information: Cs (ice) = 2.1 J/g C Heat of fusion (water) = 6.02 kJ/mol Cs (water) = 4.184 J/g C Heat of vaporization (water) =
  28. Physics

    A room has a volume of 120 m^3. An air-conditioning system is used to replace the air in the room every twenty minutes, using ducts that have a square cross ection. Assuming that air can be treated as an incompressible fluid, calculate the length of a side
  29. science

    Why is the sperm of a guy thick? The sperm are not thick. Semen — the chalky to milky white, semi-viscous fluid that is ejaculated — contains sperm plus fluids from the seminal vesicles (almost 1/3 of the volume) and the prostate (about 2/3 of
  30. Algebra help!

    1.) Solve the system by triangularizing the augmented matrix and using back substitution. -x-y+z=1 x-y-4z=-7 4x+y+z=6 2.) Perform the indicated row operation, then write the new matrix. -4 4 | 4 9 -6 | 5 -2R1+ R2 ---> R2 3.) Solve the system by
  31. Science!!

    How do you expect the water level to change when the apparatus is placed in warm water? In cool water?
  32. chemistry

    What happens if the water hoses are incorrectly attached in a distillation apparatus - i.e. the water in and water out are switched?
  33. water treatment

    Which five quality parameters of the raw water may not meet drinking water standards?
  34. English

    What is the last step for planting potatoes? 1. It is to water well. 2. Water well. 3. It is "Water well." (What is the suitable answer for the question?)
  35. science

    Concentrated sulfuric acid (18.4 molar H2SO4) has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar, the solution has a density of 1.38 grams per milliliter and can be used as an electrolyte in lead storage batteries for
  36. science

    1.Describe how the hot water and the cold water moved when the divider was lifted. 2.Use your understanding of density to explain the motion of the water.
  37. Chemistry

    If there are 25 mg of water in a typical drop of water, how many drops of water would react completely with 2 mmol of phenylmagnesium bromide? How do I set up the problem?
  38. Chem please help

    Which of the following would have the greatest entropy? A. Water placed in the refrigerator B. Water sitting out on the kitchen counter C. Water vapor D. An ice cube I think c what about you drbob222
  39. Chemistry

    Identify the compound with the highest entropy. a. solid ice b. room temperature water c. gaseous water d. frozen water
  40. CHEMISTRY

    IF 100.0G OF WATER AT 90'C IS ADDED TO 50.0G OF WATER AT 10'C, ESTIMATE THE FIBNAL TEMPATURE OF WATER. EXPLAIN YOUR REASONING. PLEASE HELP I DON'T GET IT AND I HAVE ANOTHER PROBLEM SIMILAR TO THIS
  41. Chemistry Help Please

    Titration of a Sample of Household bleaches: The oxidizing agent in a household bleach is determined by placing 100 mL of distilled water in a 250 mL Erlenmeyer flask and adding 10 mL of the 10% (w/w) KI solution, swirling the contents of the flask to mix
  42. Math (can you provide me with the working and ans?

    A rectangular tank 28cm long and 18cm wide was filled with water to a dept of 7cm. When 12 marbles were added the level rose to 12cm. Find the average volume of the 12 marbles.
  43. Physics

    A cylinder contains the helium gas with a volume of 0.1 m3 at a pressure of 220 kPa. The gas is compressed to a volume of 0.02 m3. The process is adiabatic and the specific heat ratio of the gas is 1.66. Determine (a) the pressure in the cylinder after
  44. Math!! (repost) really need help!!

    A cone has a diameter of 24 in. and a height of 10in. What is the volume of s cone? use 3.14 as an approximation.. final answer in tenths - Im stuck between two answers: 94.25 because if I do 3 x 10 to find the volume. I say 3 because the diameter is 24
  45. Math/Metric system

    I need to know how to make conversions and compare within the metric system of measurement. Such as 0.75L. is equal to how many mL. I have to do problems like that with length, weight, andvolumn.
  46. College Algebra

    Solve using substitution.If the system has infinitely many solutions, express your answer in terms of k. If the system is inconsistent, enter INCONSISTENT. Here is my work: y=5x-5 5x-y=5 5x-(5x-5)=5 5x-5x+5=5 5=5 y=5x-5 k=5x-5 5x=k+5 x=1/5k+1 x,y = (k/5+1,
  47. Physics

    For a pulley system with 8 supporting strands, how far would you have to pull the rope to lift a 125 kg object 1.0 meters off the ground? What if the pulley system were only 80% efficient?
  48. Health

    The portion of the nervous system that controls involuntary activities is a subdivision of the _______ nervous system. A. sympathetic C. peripheral B. central D. parasympathetic (c)
  49. Math/Algebra

    Solve the following system of equations. x+7y=8 (1) x=2-7y (2) What is the solution of the system? Type the ordered pair state that there is no solution. I don't understand what they are asking me to do. Should I use #2 in equation #1 or something else?
  50. chemistry

    An aqueous solution of copper (II) sulfate is a thermodynamic system under study. What typer of system is this if the solution is contained in a beaker on a laboratory table?
  51. Science

    The portion of the nervous system that controls involuntary activities is a subdivision of the ____ nervous system. A. sympathetic B. central C. peripheral D. parasympathetic I think it's either B or C right?
  52. Math

    5. A system of linear inequalities is shown below: x + y ≥ 4 y < 2x – 3 Describe the steps to graph the solution set to the system of inequalities. Be specific. (10 points)
  53. physics

    You exert a force of 455N in pulling 15.0m of rope using a pulley system to lift a 935N object 5.0m. What is the efficiency of the pulley system? Please help, I appreciate it a lot.
  54. Algebra

    Show equation AX=B represents a linear system of two equations in two unknowns. Solve the system and sustitute into the matrix equation to check results. A=|1,2| |-3,5|, X=|x[1]x[2]|, B=|-4 12|
  55. to ALison (planets)

    Just out of curiosity, what didn't you like about the wiki.answer slides? They seemed to explain fairly well why the rocky planets are in the inner system, and the gaseous ones are in the outer system.
  56. Intermediate Algebra

    Solve using elimination method. If the system has no system or infinite number of solutions, state this. Please show all work. I need to show how I came about my answer. I need this as soon as possible please. I would appreciate any and all help!! 2x+2y=20
  57. jimma university facaliy of law

    compare & contrast the three major legal system of the world the babylonyan,greek&roman legal system ?
  58. algebra 2

    A doctor needs at least 60 adults for a medical study. He cannot use more than 40 men in the study. Write a system of inequalities to model the situation and solve the system by graphing.
  59. Chemistry

    What is the molarity of a solution containing 1.23g of LiOH in enough water to give a final volume of 380ml? I know the MW of Li is 6.941, O is 15.9594 and H is 1.00794. Using this info the number of mols in 1.23g of LiOH is 0.05144
  60. Chemistry

    A sample of 40.0 mL of hydrogen is collected by water displacement at a temperature of 20 degrees Celcius. The barometer reads 751 torr. What is the volume of the hydrogen at STP (standard temperature and pressure)?
  61. Chemistry- dilution

    51.0 mL of a 1.20 M solution is diluted to a total volume of 248 mL. A 124-mL portion of that solution is diluted by adding 125 mL of water. What is the final concentration? Assume the volumes are additive.
  62. science

    The solubility of sodium chloride is 36.0 g/100. ml of water, and the density of saturated NaCl solution is 1.202 g/mL.. I have 500. mL of a 1.00 M NaCl solution. If I boil it to the point of saturation, what is the final volume?
  63. Chemistry

    In an experiment, a mixture of two gases occupies a volume of 3.00 L at a temperature of 22.5 degree centigrade. The mixture contains 14.0 g of water, 11.5 g of oxygen, and 37.3 g of nitrogen. Calculate the total pressure and the partial pressure of each
  64. Chemistry

    Can someone check my answers? Thanks. 1.) If you were involved in an acid rain monitoring project with several other samplers, why would it be important that all of you collect your samples on the same day and do the alkalinity tests within 24 hours? Acid
  65. chemistry

    - What fraction of an E coli cell is occupied by its DNA? How would I find the fraction? If I knew the volume of an E coli cell, would I divide that by the volume of DNA in an E coli cell? - A human cell is typically spherical with a diameter of 20
  66. physics

    A gas of volume 2m^3 at 27C is heated to 327C at constant pressure. What is its new volume?
  67. physical

    V1=3m3,P1=1.2KPa T=const How much will be change P if A) volume reduced to 1.5 ,2 and 2.5 B) volume increase to 1.5 ,2 and 2.5
  68. Chemistry

    The volume of a gas is 76cm3 at 27c and 800mm mercury pressure.what is the volume at s.t.p
  69. chem

    calculate volume of excess KOH(aq) and the volume of 6.00M H2SO4(aq) to neutralize it
  70. physics

    A gas of volume 2m^3 at 27C is heated to 327C at constant pressure. What is its new volume?
  71. chmistry

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

    THE VOLUME OF A CONE IS 20 PI CUBIC METERS. WHAT IS THE VOLUME OF A CYLINDER HAVING THE SAME BASE AND SAME HEIGHT?
  73. Bio Last

    Can someone help me find the definitions of respiratory tidal volume and cardiac stroke volume.
  74. Math

    what is the volume of a sphere that has the same diameter and height of a cylinder that is 24 cubic feet in volume?
  75. Science

    An unknown substance has a volume of 25 mL. It is placed into a different container and its volume changes to 50 mL. What happened? Is it a change in state?
  76. Math

    what is the volume of a sphere that has the same diameter and height of a cylinder that is 24 cubic feet in volume?
  77. Chem

    A gas at pressure 912 mm of hg has volume of 450 cm3 what will be volume at 0.4 atm
  78. chemistry

    What is the volume of dry O2 gas at STP, if it had a volume of 5.00 L at 103 kPa and 300 K?
  79. Chemistry

    A hot air balloon has a volume of 55,287 m3 at 60C, what is its volume at 20C?
  80. Chemistry

    A sample of O2 (g) occupies a volume of 3.0 L at 700 mmHg, calculate its volume at 375mmHg.
  81. physics

    what will the volume of a gas at 309K if its volume at 215K is 3.42 L? Assume the pressure is constant
  82. Earth science

    If the volume in a graduated cylinder is raised from 50ml to 51 ml, what is the objects volume?
  83. chemistry

    a gas have a volume of 100.0 ml when the temperature is -123C. What will its volume be at 27C? i don't know how to do it. can you help me please?
  84. chemistry

    what is the concentration in percent volume of 60mL or methanol in a total volume of 500mL
  85. Chemistry

    what volume of 0.1M HCl would be needed to neutralize 0.35M NaOH to a 100ml volume?
  86. chemistry

    Please help me with this question For the system, (the previous post i forgot to post the Kp) PCl5 (g) --> PCl3 (g) + Cl2 (g) In a 5.0 L flask, the gaseous mixture consists of all three gasses with partial pressures as follows: PCl5 = 0.012 atm PCl3 =
  87. Maths

    A container in the shape of a right circular cone with vertex angle a right angle is partially filled with water. a) Suppose water is added at the rate of 3 cu.cm./sec. How fast is the water level rising when the height h = 2cm.? b) Suppose instead no
  88. Physics

    The makers of a certain automobile advertise that it will accelerate from 15 to 50 mi/hr in high in 13 sec. Compute (a) the acceleration in ft/ sec2, and (b) the distance the car travels in this time, assuming the acceleration to be constant.
  89. Science

    brain central nervous system human being nerve tissue neurons Organize the parts of this body system in the CORRECT order according to the levels of organization in a multicellular organism, simplest to most complex..
  90. American Goverment

    In the United States, the emphasis on individual rights helped to shape A. a powerful foreign policy. B. a sense of national identity. C. a strict class system. D. a system of religious intolerance. ?? help Please.
  91. science

    brain central nervous system human being nerve tissue neurons Organize the parts of this body system in the CORRECT order according to the levels of organization in a multicellular organism, simplest to most complex..
  92. Physics-PLEASE ANSWER, it's due soon!

    A copper calorimeter can with mass 0.202 kg contains 0.185 kg of water and 1.40×10^−2 kg of ice in thermal equilibrium at atmospheric pressure. If 0.900 kg of lead at a temperature of 417 degrees celsius is dropped into the can, what is the final
  93. English

    The sentence, "So we drove on towards death throught the cooling twilight", is a. a metaphor b. an example of weather reflecting life c. used to build suspense and foreshadow upcoming trouble d. a zeugma e. used to contrast the coolness of the evening from
  94. chemistry

    A sample of gas has a volume of 1.30 L at STP. What is the temperature in °C if the volume is 13.0 L at 2.00 atm?
  95. geometry

    The volume of a cone is 180cm^3 , if the radius and the height are 3 times more, what would be the volume ???
  96. physics

    A lead ball has a volume of 94.3 cm3 at 19.3°C. What is the change in volume when its temperature changes to 34.3°C?
  97. chemistry

    calculatethe volume of o2 and volume of al needed photon combusion on 18 kg at carbon
  98. Physics

    A lead ball has a volume of 94.3 cm3 at 19.3°C. What is the change in volume when its temperature changes to 34.3°C?
  99. chemistry

    At 7.0 degrees C, the volume of a gas is 49ml. At the same pressure, its volume is 74 mL at what temperature?
  100. Math, volume

    How do you find the volume inside the cylinder but outside the sphere? H=12cm.