1. engineering

    In an electric car, regenerative braking is used to recharge batteries. The principle of regenerative braking involves converting the kinetic energy of the vehicle into energy stored in a battery. If a car is traveling at a speed of 30 km/h and is stopped completely by braking...
  2. Physics

    A 1200-kg automobile is stolen by the notorious Physics joyriders known as “the centripetal gang”. The gang tests their grasp on Newtonian physics by cruising around a banked circular track of radius 1025 m. From previous ‘experiments’ the gang has discovered the car...
  3. Math

    A saline solution is 20% salt. How many gallons of water must be added to dilute the mixture to 8 gals of a 15% saline solution? here is my method: using c1V1 = c2V2, (0.2)(V1) = (0.15)(8) V1 = 6 gals So, since 8 gals are required to dilute the saline solution of 15%, 8-6 = 2 ...
  4. yr 8 design technology

    Systems and Control- inputs ,process and outputs 1) public address system - input ? 2)table lamp - process ? 3) street lamp - input ? 4)burgular alam - process? 5)doorbell-output-doorbell sounds (ding dong is this right?) 6)car windscreen - input-? 7)refrigerater- output- cold...
  5. 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 automobiles. 1. Calculate ...
  6. chemistry

    a certain paint has a density of 0.914 g/mL. you need to cover a wall that is 7.6 meters long and 2.74 meters wide with a layer of paint that is 0.13 mm thick. what volume of pain (in liters and gallons)is required? what is the mass (in grams and pounds) of paint layer?
  7. English

    I need you to check these sentences for m, please? 1) What's the weather going to be like in Rome tomorrow? 2) It's going to be windy, sunny, foggy,overcast, frosty, rainy,cloudy, misty. stormy. 3) There is going to be thunder and lightning (or they are going to be thunders ...
  8. science

    what volume of helium would be in a balloon the size of a soft drink bottle? Depends on the size of the soft drink bottle. . . . The worksheet didn't specify the size. It wants us to apply strategies. Thank you.... i'm assuming about the same volume as in the bottle Volume of ...
  9. Chemistry

    Water had the lowest bp of 100C b/c it has no solute to block the movement which cause to have a lower bp when heated. Water with a solute of sugar has a slightly higher bp of 101C because it has a solute o block off some of the waters movement to the top. Water and salt had ...
  10. chemistry

    An automobile tire contains air at a pressure of 200. kPa and 25°C. The tire and its air heat up during traveling. If the pressure increases to 250. kPa but the volume remains the same, what is the temperature of the air inside the tire?
  11. math

    A birch tree that is 4 ft tall grows at a rate of 1 ft per year. A larch tree that is 6 ft tall grows at a rate of 0.5 ft per year. Let the variable t represent time in years and h represent height in feet. In how many years will the trees be the same height? Which system of ...
  12. Chemistry

    When reviewing the procedure the student found that 4.912 x 10-1 M barium nitrate solution had been used instead of that in the following procedure: A student synthesized 6.895 g of barium iodate monohydrate, Ba(IO3)2*H2O by adding 30.00 mL of 5.912 x 10-1 M barium nitrate, Ba...
  13. Chemistry

    When reviewing the procedure the student found that 4.912 x 10-1 M barium nitrate solution had been used instead of that in the following procedure: A student synthesized 6.895 g of barium iodate monohydrate, Ba(IO3)2*H2O by adding 30.00 mL of 5.912 x 10-1 M barium nitrate, Ba...
  14. Physics

    The crane shown in the drawing is lifting a 170-kg crate upward with an acceleration of 1.1 m/s2. The cable from the crate passes over a solid cylindrical pulley at the top of the boom. The pulley has a mass of 130 kg. The cable is then wound onto a hollow cylindrical drum ...
  15. Math

    1. Tell whether the system has one solution infinitely many solutions or no solution. 9x+8y=15 9x+8y=30 a. one solution b. infinitely many solutions*** c. no solution 2. Tell whether the system has one solution infinitely many solutions or no solution. 5x-3y=10 10x+6y=20 a. ...
  16. Chemistry

    If I'm going to transfer a piece of metal (a reasonable size) from a beaker of boiling water into a calorimeter, what should I use? Tweezers are too small...I can only think of a beaker clamp, but they are, after all, for beakers.
  17. Physics

    Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v_0. Car 1 begins to move at t=0, speeding up with a constant acceleration a_x. Car 2 continues to move with a ...
  18. Englis

    Which two words contain the same constant blend? 1. sailor and found 2. belly and stumped 3. thumped and bumped 4. soon and jumped #3
  19. ap chemistry

    Benzene is a hydrocarbon that is commonly used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the body can cause cancer. What is the vapor pressure of benzene at 29C? The normal boiling point of benzene is 80.0C and its molar heat of ...
  20. ap chemistry

    Benzene is a hydrocarbon that is commonly used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the body can cause cancer. What is the vapor pressure of benzene at 29C? The normal boiling point of benzene is 80.0C and its molar heat of ...
  21. AP Chem

    Benzene is a hydrocarbon that is commonly used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the body can cause cancer. What is the vapor pressure of benzene at 29◦C? The normal boiling point of benzene is 80.0◦C and its molar heat of ...
  22. organic chemistry

    How many milliliters of boiling water are required to dissolve 25 g of phthalic acid? If the solution were cooled to 14 degree Cellucius, how many grams of phthalic acid would recrystallize out?
  23. Physics

    A plane weighing 220 kN (25 tons) lands on an aircraft carrier. The plane is moving horizontally at 67 m/s (150 mi/h) when its tail hook grabs hold of the arresting cables. The cables bring the plane to a stop in a distance of 84 m. (a) How much work is done on the plane by ...
  24. physics

    while moving out of her dorm room bridget carries a 12kg box to her car, holding in both arms. how much force must be exertrd by each of her arms to supprt the box b) how will this force change if bridget holds the box with only one arm.?
  25. Trigonometry

    Alrighty I have to find two real world sinusoidal functions. I found: 1. A piston in an engine moves up and down in a cylinder. The height, h centimeters, of the piston a t seconds is given by the function: h= 120 sin(πt) + 200. 2. You can find the amplitude of a wave ...
  26. Chemistry

    The enthalpy of vaporization of chloroform (CHCl3) is 29.2 kJ mol-1 at its normal boiling point 61.2 Celsius. what is the standard change in entropy for vaporization of chloroform at its normal boiling point? Answer I got was 29.2/334.2 = 0.0873. (CORRECT?)
  27. chemistry

    I need help on these questions. They all seem pretty similar i think? i don't know what formula i am suppose to use. And what does nonvolatile mean? is that like a clue or something? 1) 2.6 g of the nonvolatile solute sucrose (C12H22O11) is added to 465 g of water at 25oC. ...
  28. chemistry

    Calculate the volume of natural gas (methane) required to bring 2.6 L of water to a boil. Assume the initial temperature of the water is 21 C, and the methane is at 1 bar and 25 C. Assume that methane is an ideal gas, the specific heat capacity of water to be constant and ...
  29. science

    3. One calorie is the energy required to raise one gram of water one degree Celsius. Since we use the joule as the standard measurement of energy, 1 calorie = 4.184 J. If a pot is placed on the stove with 2.4 liters of water at a temperature of 27°C, how many joules are ...
  30. Pure Maths

    A container is in the shape of a right circular cone (inverted) with both height and diameter 2 meters. It is being filled with water at a rate of (pi)m^3 per minute. Fine the rate of change of height h of water when the container is 1/8th full(by volume). (Volume of a right ...
  31. college

    Post a 200-300 word response to the following: Computer technology continues to make rapid advances. Health care facilities have used computer programs for administrative functions such as payroll and billing. How do health care facilities use electronic (or computerized) ...
  32. Physics

    Imagine a fender bender between a large truck and a small car. During the impact, Choose one answer. a. the truck exerts a greater amount of force on the car than the car exerts on the truck b. the car exerts a greater amount of force on the truck than the truck exerts on the ...
  33. College Physics

    Dry Ice. At standard atmospheric pressure, the solid form of carbon dioxide called “dry ice” undergoes a phase change not to a liquid but straight to a gas. This process is called sublimation, and like other phase transitions heat energy is required. In this case it is the...
  34. physics

    A car is equipped with a bumper that is designed to absorb collisions. The bumper is mounted to the car using pieces of flexible tubing. The car is traveling at 1.5 m/s when it collides with a rigid black wall. If the wall exerts an average force of 44.1 kN on the car as the ...
  35. Physics

    A car is behind a truck going 18 m/s on the highway. The car's driver looks for an opportunity to pass, guessing that his car can accelerate at 0.6 m/s2 and that he has to cover the 20-m length of the truck, plus 10-m extra space at the rear of the truck and 10 m more at the ...
  36. Physics

    How large a pressure increase (in ATM) must be applied to water if it is to be compressed in volume by 1%? The bulk modulus of water is 2 × 109 N/m2 and 1 ATM = 105 N/m2
  37. Chemistry

    A student dissolves 2.57 grams of iodine [molar mass= 257]in 10.0 grams of carbon tetrachloride [kb = 5.03C/m]. The normal boiling point of carbon tetrachloride is approximately 77degreesC. What is the approximate boiling point of the solution above?
  38. physics

    a)Two cars are traveling along a straight line in the same direction, the lead car at 24.5m/s and the other car at 29.6m/s. At the moment the cars are 41.6m apart, the lead driver applies the brakes, causing her car to have an acceleration of -2.00m/s2. How long does it take ...
  39. plz..chemistry help

    One mole of solid NH4Cl (s) isvheated in a closed box to decompose it partially according to the following reaction:  NH4Cl (s) <=> NH3 (g) +HCl (g)  A) calculate Kp of the above system at the temperature of the experiment if the partial pressure of ammonia at ...
  40. phy111

    1 The principle of conservation of heat energy states that that when an object is at constant temperature or is in thermal equilibrium, it is losing and gaining heat at equal rates. the heat lost by a hot body is equal to the heat gained by the cold body in any system provided...
  41. physics

    1 The principle of conservation of heat energy states that that when an object is at constant temperature or is in thermal equilibrium, it is losing and gaining heat at equal rates. the heat lost by a hot body is equal to the heat gained by the cold body in any system provided...
  42. Algebra 2

    2 questions: 1. Find "a" if (=3,7) is a solution of 2x+ay=26 2. solve system using substitution, linear combination, and graphing: 3x-2y=3 5x+4y=16
  43. alg 2

    2 questions: 1. Find "a" if (-3,7) is a solution of 2x+ay=26 2. solve system using substitution, linear combination, and graphing: 3x-2y=3 5x+4y=16
  44. hum 130

    Considering that Hinduism lacks a uniting beleif system, what makes up the Hindu religion?
  45. government

    capitalism is also called a a. command economy b. welfare state c. free enterprise system a
  46. SCIENCE

    ARE ANY OF THE 9 PLANETS WITHIN OUR SOLAR SYSTEM A LIGHT YEAR OR MORE AWAY FROM EARTH?
  47. biological

    describe how the nervous systen and hormone system enable body to maintain optimum health
  48. Social Studies

    Compare and contrast the economic theory of communism to the US Capitalism and Free Market System.
  49. accounting

    in a process cost system product costs are accumulated by processing department rather than a job
  50. math

    For the metric system i know it goes, Kilo, hecto, ?, Basic Unit, ?, centi, milli I don't know two of them, what are they?
  51. 7th grade

    we are re-teaching the metric system and i forget how to do any of it! can you help me with like convertic and things? thx - k gurl
  52. Math

    If a point of a three-dimensional system is labeled with the coordinates (1, 2, -2) what is the Z coordinate? a. 1 b. -1 c. 2 d. -2 This one I am not sure but I think it is d.
  53. Aantomy

    How would damage to inter neurons in the spinal cord affect nervous system function?
  54. Anatomy

    How would damage to inter neurons in the spinal cord affect nervous system function?
  55. pre algebra

    solve the following system graphically. Check your solution. 3x+y=9 -2y=x-8 I know im supposed to put it in y=mx+b form but i don't know how to.
  56. Math

    Solve the system of equations using the matrix tool and enter the solution as an ordered pair. 3x + 4y = 18 2x + 5y = 19
  57. operating system

    Generate a set of test inputs and expected results for the currency conversion program
  58. global

    What government system was more effective, during the seventeenth and eighteenth centuries, absolutism or democracy?
  59. history

    why does the majority part have an advantage over the minority party under the committee system?
  60. Socials

    Can someone please explain why a transformation system can help or hinder industrialization? I am having trouble on this, thanks in advance
  61. Algebra

    2x+4z=-8 3x+y+5z=2 -x+y-2z=4 I need to solve each system of equations by using the inverse of the coefficient matrix. Are these the correct answers. Thank you x=24 z=-14 y=0
  62. history

    the aryans intrdoduced what restrictive and heredity social class system into the indus valley ?
  63. physics

    need help decomposing theses vectors to x and y 52.9 meters at 19 degrees rectangular cor-ordinate system
  64. Chemistry

    Predict the sign of Delta S in the system for each of the following reactions. 2H3O^+(aq) + CO3^2-(aq) ---> CO2(g) + 3H2O(l) -,+, or 0?
  65. chemistry

    Predict the sign of Delta S in the system for each of the following reactions. 2H3O^+(aq) + CO3^2-(aq) ---> CO2(g) + 3H2O(l) -,+, or 0?
  66. math

    0.3x-0.2y=4 0.5x+0.3y=-7/17 Can anyone Please help me solve using the elimination system..... Someone tried to explain it but I still do not get it at all
  67. 402 soc

    How does the political-economic system affect the problems related to the American economy and work?
  68. algerbra

    System of equation can be solved by graphing or by using substitution or elimation. What are the pros and cons for each methods?
  69. algebra

    what is the solution of the following linear system ? 8x + 3y = 1 x + 5y = 14 a)(2,3) b)(-1,3) c) none d) infinite number of solutions and the answer i picked was b thank you!!!!!!!!!!
  70. algebra

    what is the solution of the following linear system? -5x - 5y = -6 -5/2x - 5/2y = -6 a) none b) (-2,2) c)(-,2,-2) d) infinite number of solutions and the answer i picked was a or d thanks :)
  71. algebra

    what is the solution of the following linear system? -5x - 5y = -6 -5/2x - 5/2y = -6 a) none b) (-2,2) c)(-,2,-2) d) infinite number of solutions and the answer i picked was a or d thanks :)
  72. social studies

    I have to tell about the society of the Iroquois people. Does that include their system of government as well?
  73. system operations management

    Taylor Inc manufactures widgets A cost benefit matrix that compares the alternatives.
  74. algebra

    Select the ordered pair from the choices below that is a solution to the following system of equations: 4y = x - 13 2x + 16y = 20
  75. business and tecnology class

    Which economic system is the best olution to hanling a crisis of epic proportion.
  76. health

    what is a catchy starting sentence to stat talking about " hip replacement system recall"?
  77. world history

    what social clasess existed within the feudal system?what were the definig charaacteristic of each class?
  78. college physics

    Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples.
  79. hcs/430

    What function does the judicial system currently serve regarding health care delivery
  80. chem 106

    What is the chemistry of a fusible alloy, and how is one incorporated into an automatic sprinkler system?
  81. Advanced Algebra

    Solve the system -3x+4y=-6 5x-3y=-22 3y+2z=-1 I'm not sure how to approach this question because all of the equations are missing a variable??
  82. business information systems

    list the alternative methods and tools for system development. How do they differ from SDLC?
  83. Anatomy

    The gland that helps regulate the endocrine system by secreting stimulating hormones is the____. Thanks for helping!
  84. human resources

    What do you think are the prime advantages and disadvantages of Nike’s computer-based interviewing system?
  85. physics

    How far must the point charges = 7.20 and = -25.0 be separated for the electric potential energy of the system to be -130 ?
  86. math

    solve using the elimination method. If the system has no solution or infinite number of solutions a state this 4x-6y=30 3x-5y=24
  87. Social Studies

    What point was Madison making about the system of government created by the proposed U.S. Constitution?
  88. physiology

    please help with a link to scientific articles about metabolic demands of excercise in cardiovascular system
  89. Math

    "Solving a system involving three unknowns." We're supposed to use substitution or elimination. 3d+e-2f=-14 2d-3e+4f=-23 5d+4e-10f=-13
  90. Algebra

    Solve using the substitution method. If the system has no solution or an infinite number of solutions, state this. -x + 6y = 54 3x + y = 9
  91. math for elemetary school teachers

    need to create a number system using only: A=1, B=2, C=3, D=4 and Zero=0. Help
  92. economics

    when voluntary exchanges in the markets determine decisions on production and consumption, the society's economic system is a?
  93. physics

    find the total mechanical energy of a mass-spring system with m=1.24 kg and maximum speed 0.670 m/s
  94. MACROECONOMICS

    compare and contrast the Islamic perspective on consumption, investment and savings to conventional economic system?
  95. algebra

    use method of substitution to solve the system of linear equations. 2x-y=3 9x-4y=14 is the solution an ordered pair(,)
  96. Social Studies

    Whats the office of the judicial system? My other choice was Justice Building. Is that the answer?
  97. history

    Which system of Spanish government did haciendas replace? A. the encomienda B. popular sovereignty C. socialism D. coalitions
  98. math

    create a situation that can be modelled by this linear system, then write a related problem. 10x + 5y = 850 x - y = 10
  99. business

    Can anyone help me with these two questions? How do the various interests in land and real estate differ? Where did this system originate?
  100. pre calculus

    Algebraically solve the system of equations using any method you wish 3x-10y+z=5 -4x+9y-z=-6 -13y+z=2
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