Which of the following correctcly identifies the methods of heat transfer?

11,549 results
  1. More Chem

    Consider the combustion of propane. Delta H is -2221 kJ. Assume all heat is from combustion of propane. What mass of propane must be burned in order to furnish this amount of energy assuming the heat transfer process is 60% efficient.

  2. Math

    (1) which of the following correctly identifies the methods of heat transfer? 1. A- convention B- radiaton C- conduction ~~~~~~~~~~~~~ 2. A- conduction B- radiaton C- convention ~~~~~~~~~~~~~ 3. A- convention B- conduction C- radiaton ~~~~~~~~~~~~~ 4. A-

  3. Physcis

    which of the following is a example of heat transfer by radiation? Please choose the right answer for this question before 1 hour.

  4. Science

    1. Water bubbles up through a hot spring in Yellowstone National Park. What method of heat transfer is this? A. Conduction B. Radiation C. Solar D. Convection 2. Heat transferred between two substances in direct contact with each other is known as which

  5. science ms.sue or mr.reed plz help me

    why does the design of the vacuum flask minimize heat transfer by conduction

  6. Thermodynamics

    A lawnmower tractor engine produces 18hp using 40kW of heat transfer from burning fuel. Find the thermal efficiency and the rate of heat transfer rejected to the ambient. I converted the power to 13.24kW then found the efficiency by dividing 13.24kW by

  7. PLEASE HELP SOON! (MS. SUE PLEASE)

    Which of the following correctly identifies the methods of heat transfer? A. Convection-Radiation-Conduction B. Conduction-Radiation-Convection C. Convection-Conduction-Radiation*** D. Radiation-Convection-Conduction

  8. Science

    which of the following illustrates conduction as a mode of heat transfer 1 point a microwave oven produces electromagnetic waves that transfer to the food in the form of head leaving a metal spoon in a bowl of hot soup will make the spoon at a well pasta

  9. science

    PS. how to do this is below the questions Heat Transfer Example method of heat transfer 1.an entire lake is heated by water 1. from a hot spring at the bottom of the lake. 2. sunlight melts a wax crayon left outside. 2. 3. a burner on a stove heats the

  10. Science

    A man relaxes in his hot tub after a long day at work. hid ody temperature is 98.6 F. The temperature of the water in the hot tub is 102 F. How does heat transfer A) Heat does not transfer between his body and the water. B) Heat transfers to his body from

  11. Science

    Which of the following correctcly identifies the methods of heat transfer?

  12. Physics

    Just as no mechanical device can be 100% efficient, no heat engine can transfer 100% of its heat to a single object. Some of the heat energy must be wasted (released into the environment). We have a heat engine that produces 150 J of heat, does 40 J of

  13. Physics -- check answers please

    1. what is 67 K equivalent to in Celsius? answer: -206.15 C 2. what is 458.9 Celsius in K? answer: 732.05 3. heat is closely related to: a)temperature b)thermal energy c)force d)convection currents answer: b 4. What does a low efficiency score reveal about

  14. science

    The total energy of motion in the molecules is called POTENTIAL ENERGY. TEMPERATURE is the average amount of energy of motion in the molecules of a substance. A THERMOMETER is a thin glass tube with a bulb on one end that contains a liquid,usually mercury

  15. Chemistry

    How many grams of methane must be combusted to heat 1.05 of water from 24.0 to 89.0, assuming as a product and 100% efficiency in heat transfer?

  16. science

    The total energy of motion in the molecules of a substance is called? ?is the average amount of energy of motion in the molecules of a substance. A ? Is a thin glass tube with a bulb on one end that contains a liquid usually mercury or a colored alcohol.

  17. science

    what kind of heat transfer causes earth's major wind patterns

  18. chemistry

    When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 12.0 fluid ounce drink from 75°F to 35°F, if the heat capacity of the drink is 4.18 J/g·°C? (Assume that the heat transfer is 100% efficient.) please explain realy realy

  19. science

    Which of the following correctly identifies the methods of heat transfer? A. A ‒ convection B ‒ radiation C ‒ conduction B. A ‒ conduction B ‒ radiation C ‒ convection C. A ‒ convection B ‒ conduction C ‒ radiation D. A ‒ radiation B

  20. 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

  21. chemistry

    How many grams of methane must be combusted to heat 1.05 of water from 24.0 to 89.0, assuming as a product and 100% efficiency in heat transfer?

  22. chemistry

    Islands in the middle of the oceans (for example, Great Britain, Hawaii, Bermuda) tend to have more stable climates with smaller temperature fluctuations than regions of the same mass surrounded by land (for example, continents). Use your knowledge of heat

  23. physics

    The "steam" above a freshly made cup of instant coffee is really water vapor droplets condensing after evaporating from the hot coffee. What is the final temperature of 200 g of hot coffee initially at 90.0°C if 2.00 g evaporates from it? The coffee is in

  24. Chemistry HEAT OF FUSION

    What is the final temperature, in oC, after a 15.0 g piece of ice, at 0oC, is placed in a styrofoam cup with 128 g of water initially at 74.0oC. Assume there is no transfer of heat to or from the surroundings. The specific heat of water = 4.184 JK-1g-1 The

  25. Chemistry II

    Liquid sodium can be used as a heat transfer fluid. It's vapor pressure is 40.0 torr @ 633 degrees C and 400.0 torr @ 823 degreees C. Calculate it's heat vaporization.

  26. Chemistry- URGENT please HELP

    NH4NO3(s)+H2O(l)→NH4NO3(aq) ΔH = +25.7 kJ. What is the final temperature in a squeezed cold pack that contains 49.0g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/(g⋅∘C) for the solution, an initial temperature of 28.5∘C,

  27. 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

  28. Human Resource Management

    Consider these methods for performance appraisal: trait methods, behavioral methods, and results methods. Then select an industry or organization that has many occupational positions within it (the retail industry, the transportation industry, a marketing

  29. Chemistry

    In lab we conducted a calorimetry experiment with a peanut. We burned a half a peanut and placed it underneath a pop can with 50mL of water inside. One of our questions is why heat transfer to the pop can isn't accounted for when calculating heat generated

  30. Physical Science

    The transfer of heat that takes place because of the density difference in fluids is

  31. science

    For your discussion assessment, you will present your proposal of a device that minimizes heat transfer.

  32. thermodynamics

    0.5 kg of saturated vapor is contained in a closed system with pressure of 10 bar is cooled at constant volume until pressure decreases to 5 bar. Determine heat transfer and sketch the process in a P-v and T-v diagram answer = -473.35 kJ(heat is

  33. Physical Science

    QUESTION GIVEN---Thermal conductors don’t have to be hot to transfer heat. According to Ch.16, explain a situation when an ice cube would still transfer heat to another object it is in contact with. MY ANSWER---Because, the ice may be trying to transfer

  34. physical science

    hermal conductors don’t have to be hot to transfer heat. According to Ch.16, explain a situation when an ice cube would still transfer heat to another object it is in contact with.

  35. thermodynamics

    3.4 A heat engine operates between two heat reservoirs with temperatures of 560 and 280 K a) The heat engine itself has a temperature of 560 K during heat addition from the 560 K reservoir and a temperature of 280 K during heat rejection to the 280 K

  36. physics-heat transfer

    energy conscious homeowners often insulate their homes. one form of insulation is thick pads of loosely packed glass fibres.explain how these pads reduce heat transfer. how do thick curtains help reduce heat loss from the windows of a house? builders often

  37. surface energy budget

    I'm give the following data: Q*, QG, QH, QE for a 24-hour period, i'm required to plot these 4 data on the same graph, which I've already done. I'm also required to compute these 24 hours totals - transfer of sensible heat to the atmomsphere - transfer of

  38. Thermodynamics

    Can I have any energy transfer as heat transfer that is 100% available? Explain with equation

  39. heat transfer

    a. Steam at 230oC flows through a steel pipe ( = 15/. ) whose inner and outer diameters are 9 cm and 10 cm, respectively in an environment at 15oC. The pipe is insulated with 5 cm thick fiberglass ( = 0.035/. ). The given heat transfer coefficients

  40. Physics

    How is it possible for a fabric (textile) to conduct the 3 modes of heat transfer (conduction, convection and radiation?) i've been searching for a possible experiment to investigate this but no luck Anything with a higher temperature than its surroundings

  41. science

    which of the following illustrates conduction as a mode of heat transfer 1 point a microwave oven produces electromagnetic waves that transfer to the food in the form of head ** leaving a metal spoon in a bowl of hot soup will make the spoon at a well

  42. Science

    of the following illustrates conduction as a mode of heat transfer 1 point a microwave oven produces electromagnetic waves that transfer to the food in the form of head leaving a metal spoon in a bowl of hot soup will make the spoon at a well •• pasta

  43. biology

    names and defines the levels of organization that an ecologist studies identifies the level that you would choose to study if you were an ecologist; 3) describes the method or methods you would use to study this level; and 4) gives a reason for your choice

  44. Science

    What does an Electromagnetic wave transfer into?? It can transfer to heat, electical power, mechanical power, or light.

  45. Physics -- check answers please

    1. Which of the following best shows the transfer of heat by radiation? my answer: c 2. Which of the following best shows the transfer of heat by convection? my answer: b 3. Water has specific heat of 4200 J per kilogram per degree celsius. This means that

  46. Physics -- check answers please

    1. what is 67 K equivalent to in Celsius? answer: -206.15 C 2. what is 458.9 Celsius in K? answer: 732.05 3. heat is closely related to: a)temperature b)thermal energy c)force d)convection currents answer: b 4. What does a low efficiency score reveal about

  47. (SOL PS.7)(VBO 8.4.12)

    DESIGN AN EXPERIMENT RELATE TO HEAT TRANSFER DESIGN AN INBESTIGATION FROM A TESTABLE QUESTION RELATED TO HEAT TRANSFER, OR SOUND (SOL PS.8)(VBO8.5.10 DESIGN AN EXPERIMENT FROM A TESTAN=BLE QUESTION RELATED TO SOUND

  48. physics

    The "steam" above a freshly made cup of instant coffee is really water vapor droplets condensing after evaporating from the hot coffee. What is the final temperature of 280 g of hot coffee initially at 90.0°C if 2.50 g evaporates from it? The coffee is in

  49. Chemistry

    What is the final temperature, in oC, after a 27.0 g piece of ice, at 0oC, is placed in a styrofoam cup with 120 g of water initially at 70.5oC. Assume there is no transfer of heat to or from the surroundings. The specific heat of water = 4.184 JK-1g-1 The

  50. Science

    What is the main source of energy for the water cycle? What type of heat transfer does this provide? The sun is the main source driving it: Sun heats water, water evaporates. What type of heat transfer does it provide? I think that it is radiation, but I'm

  51. Material Science

    A polystyrene ice chest contains 3 kg of ice at 0 degrees Celsius. Triangle H for melting = 3.34 x 10 to the 5 power J/kg p = 1000 kg/m cubed, CP =4190 J/ (kg K). Heat transfer is limited by conduction (k=0.06W/m K)) from the outside wall at 30 degrees

  52. Chemistry

    Heat Transfer heat diffused in our tuna steak was about 12 mm in 5 minutes. Using these values for L and for t, calculate the value of D for this time point. Enter your answer in cm2/sec, without including the units.

  53. chem

    What would happen to the specific heat if some of the warm metal shot were lost during the transfer to the calorimeter? Answer a. It would not affect the calculated value of specific heat b. It would cause the calculated value of specific heat to be

  54. chemistry

    How much ice is required to cool a 15.0oz drink from 71 F to 34 F, if the heat capacity of the drink is 4.18 J/g*C ? (Assume that the heat transfer is 100% efficient.)

  55. linguistics

    Describe what contrastive analysis is and what transfer is(both positive transfer and negative transfer)?

  56. linguistics

    Describe what contrastive analysis is and what transfer is(both positive transfer and negative transfer)?

  57. Physics - Heat Transfer

    I am trying to calculate heat transfer between two objects. The units are as follows: m1: 100 g t1: 10 degrees C spec heat 1: 1.00 cal/g degree C m2: 200 g t2: 90 degrees C spec heat 2: 0.2 cal/gm degree C I set Q1 = Q2 m1 x spec heat 1 x delta T1 = m2 x

  58. Material Science

    A polystyrene ice chest contains 3 kg of ice at 0 degrees Celsius. Triangle H for melting = 3.34 x 10 to the 5 power J/kg p = 1000 kg/m cubed, CP =4190 J/ (kg K). Heat transfer is limited by conduction (k=0.06W/m K)) from the outside wall at 30 degrees

  59. physics

    (a) How much heat flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change in entropy due to this heat transfer? (c) How much work is made unavailable, taking the lowest

  60. physics

    (a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change(J/K) in entropy due to this heat transfer? (c) How much work (J) is made unavailable,

  61. physics

    (a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change(J/K) in entropy due to this heat transfer? (c) How much work (J) is made unavailable,

  62. physics

    (a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change(J/K) in entropy due to this heat transfer? (c) How much work (J) is made unavailable,

  63. physics

    (a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change(J/K) in entropy due to this heat transfer? (c) How much work (J) is made unavailable,

  64. CHEMISTRY

    I know this question is already on here but the answer wasn't helpful to me. Liquid Sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633 C and 400.0 torr at 823 C. Calculate its heat of vaporization.

  65. heat transfer

    True or false (i) Steel is better conductor of heat than bricks. (ii) Radiations are ultrasonic waves. (iii) Black body is having emissivity 2. (iv) Natural convection do not need any external source for fluid flow. (v) Fins cause increase in rate of heat

  66. Chemistry

    You want to heat 1 kg of water 10 degrees celsius and you have the following methods under consideration. The heat capacity of water is 4.184 J/K g. (a) You can heat it with a mechanical eggbeater that is powered by a 1-kg mass on a rope over a pulley. How

  67. Physics

    Cooling of an electronic power transistor is assisted by attaching it to an aluminium heat sink. The electrical power to be dissipated is 0.3 watts, the exposed surface area of the heat sink is 0.001m2, the convection heat transfer coefficient is 6.0

  68. physics

    the mass of the water is 131 kg and its initial temperature is 24.2°C, how much energy must the water transfer to its surroundings in order to freeze completely? The specific heat of water is 4186 J/kg·K, and the latent heat of fusion is 333 kJ/kg

  69. Chemistry

    In the equation Q = mc(deltaT), I learned that Q means heat transfer. Is it the heat transfer from the system to the surroundings, i.e. the system loses/absorbs heat or is it from the surroundings to the system? A couple of places on the Internet say that

  70. thermodynamic

    what is the difference between thermodynamics and heat transfer

  71. physical science

    How do heat and work transfer energy?

  72. Chemistry

    When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 13.0 oz drink from 71 ∘F to 39 ∘F, if the heat capacity of the drink is 4.18 J/g∘C? (Assume that the heat transfer is 100 % efficient.)

  73. Chemistry

    When ice melts, it absorbs 0.33 per gram. How much ice is required to cool a 11.0 drink from 75 to 37, if the heat capacity of the drink is 4.18 ? (Assume that the heat transfer is 100 efficient.)

  74. Chemistry

    When ice melts, it absorbs 0.33 per gram.How much ice is required to cool a 12.0 drink from 72 to 37, if the heat capacity of the drink is 4.18 ? (Assume that the heat transfer is 100 efficient.)

  75. Chemistry I

    When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 24.0 fluid ounce drink from 75°F to 35°F, if the heat capacity of the drink is 4.18 J/g·°C? (Assume that the heat transfer is 100% efficient.)

  76. College Chemistry

    When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 10.0 oz drink from 77 ∘F to 40 ∘F, if the heat capacity of the drink is 4.18 J/g∘C? (Assume that the heat transfer is 100 % efficient.) Express your answer using two

  77. Chemistry

    When ice melts, it absorbs 0.33 kJ/g. How much ice is required to cool a 11.0oz drink from 76F to 39F, if the heat capacity of the drink is 4.18J/gC ? (Assume that the heat transfer is 100% efficient.) I got 11 g, but I guess that's wrong...

  78. general science

    When heat energy travelsby convection enrgy is transferred by the circulation of heated material is this tru? Yes. Convection heat transfer takes place as the result of circulation of a fluid between hot and cold regions.

  79. physics

    A transfer of heat occurs with a pot of 8.0 kg of water that changes from 400 degrees kelvin to 320 degrees kelvin. How much heat is absorbed or given off?

  80. science

    explain to to transfer heat from a electric stove?

  81. Chemistry

    You want to heat 1 kg of water 10 celsius and you have the following methods under consideration. The heat capacity of water is 4.184 J/K g. (a)You can send the water through a solar collector that has an area of 1 m^2. How long will it take if the sun's

  82. Physics

    A 0.300 kg iron horseshoe that is initially at 550°C is dropped into a bucket containing 19.4 kg of water at 21.1°C. What is the final equilibrium temperature (in °C)? Neglect any heat transfer to or from the surroundings. Do not enter units. I'm taking

  83. Physics

    A 0.1134kg spherical meteor of diameter 3 cm enters the earth’s atmosphere at an elevation of 121920m with a velocity of 13411.2 m/s. The meteor’s temperature is -73.15˚C. The specific heat at constant volume (Cv) of the meteor is 800 J/kg˚C. (a) If

  84. Physics

    Work and heat transfer calculation in a closed system Find the pressure, temperature and volume at the end of each of the four processes. Then calculate the work done during each process and the net amount of work done. Finally calculate the net amount of

  85. PLEASE HELP

    when an ice cube would still transfer heat to another object it is in contact with.

  86. Physics

    A person's body is covered with 1.4 m2 of wool clothing. The thickness of the wool is 1.3 10-3 m. The temperature at the outside surface of the wool is 14°C, and the skin temperature is 36°C. How much heat per second does the person lose due to

  87. Physics

    A gas is taken though a single process in which its volume decreases by .25 m^3 as the temp of the gas rises 2deg C. Which of the following people are more likely to have reached the correct conclusion? a. Bob Identifies this process as adiabatic b. Jill

  88. Physics

    Heat energy is the energy associated with changes in internal energy. If no phase changes occur, the transfer of heat energy is accompanied by a change in?

  89. chemistry

    capacity of the drink is 4.18 J/g·°C? (Assume that the heat transfer is 100% efficient.)

  90. Science

    Explain the difference between conduction and convection heat transfer,and give an example of each.

  91. physics

    into which part of the fridge-freezer will the rate of heat transfer be greater?

  92. Science

    What kind of heat transfer cause Earth's major wind patterns?

  93. chemistry

    Which type of heat transfer is not blocked even by an insulated thermos? radiation ???

  94. Physics

    We often use a spoon to cool coffee by stirring. Some of the heat is conducted from the coffee to the air by this method, but the spoon itself will cool the coffee a little. If a 12 gram aluminum teaspoon at 22 o C is placed in 175 ml of water (coffee's

  95. thermo

    For the following problem... I found the second pressure by solving P1V1/T1 = P2V2/T2. The Volumes is const so those cancel and then i am able to find the P2. From there i looked at the 1st law and came up with delt U = Qin which = mCvdelta T but that is

  96. chemistry

    Which one of these is NOT a mechanism of heat transfer Select one: a. Reflection b. Radiation c. Convection d. Conduction

  97. science

    how do hydrogen bonds relate to the transfer off heat from the equator towards the poles of earth

  98. Science

    For your discussion assessment, you will present your proposal of a device that minimizes heat transfer.

  99. Geography (Ms. Sue)

    what role do wind and ocean currents play in climate? My answer: Wind and ocean currents help distribute the sun's heat from one part of the world to another through convention, the transfer of heat in the atmosphere by upward motion of the air.

  100. chem- need major help!

    ok i know i posted this before but it got totally confusing and its late and its due tom. When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 14.0 fluid ounce drink from 75°F to 35°F, if the heat capacity of the drink is 4.18

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