Thermodynamics

A:

While a flame is the gaseous portion of a fire, a candle flame contains millions of diamond nanoparticles. Approximately 1.5 million diamond nanoparticles are created every second before converting into carbon dioxide. All four forms of carbon are present within a candle flame: elemental carbon, graphite, white carbon and diamond.

See Full Answer
Filed Under:
  • Which metal conducts heat the fastest?

    Q: Which metal conducts heat the fastest?

    A: Silver is the metal that conducts heat the fastest. The thermal conductivity of silver is 420 W/ (m• K) or watts per meter degrees of Kelvin. Thermal conductivity measures the ability of heat or thermal energy to move through materials.
    See Full Answer
    Filed Under:
  • Why do flames go upwards?

    Q: Why do flames go upwards?

    A: Visible flames are hot gases emitting light, which naturally rises because it is hotter (and therefore less dense) than the air around it. These hot gases are byproducts of the chemical reaction of combustion, or burning.
    See Full Answer
    Filed Under:
  • How does a fuel pump work?

    Q: How does a fuel pump work?

    A: A fuel pump pulls gasoline from the tank, guiding it along a pipe to the carburetor. Some fuel pumps are electric, mounted near or in the fuel tank, while others operate mechanically in concert with the engine. Either way, the fuel pump is what gets the gasoline where it needs to go.
    See Full Answer
    Filed Under:
  • Why is boiling a cooling process?

    Q: Why is boiling a cooling process?

    A: Boiling can be considered as a cooling process because as a liquid reaches its critical temperature, heat escapes through rapid evaporation. Essentially, boiling happens when liquids turn into gases, forcing excess heat out of the liquid.
    See Full Answer
    Filed Under:
  • What is a candle flame made up of?

    Q: What is a candle flame made up of?

    A: While a flame is the gaseous portion of a fire, a candle flame contains millions of diamond nanoparticles. Approximately 1.5 million diamond nanoparticles are created every second before converting into carbon dioxide. All four forms of carbon are present within a candle flame: elemental carbon, graphite, white carbon and diamond.
    See Full Answer
    Filed Under:
  • What materials are good conductors of heat?

    Q: What materials are good conductors of heat?

    A: Many metals, like silver, copper, gold and aluminum, are good thermal conductors. Thermal conductors are materials that heat passes through easily. Conduction, or the transfer of heat, can take place within a single material or between two objects.
    See Full Answer
    Filed Under:
  • Why does heat rise?

    Q: Why does heat rise?

    A: Hot air rises because when a substance is hot, its molecules are farther apart, which makes the hot air less dense and, therefore, lighter than cooler air. Air is generally warmer nearer the surface of the Earth because of the sun's radiating heat. When hot air rises, it starts to get cooler and eventually it sinks back down to the surface.
    See Full Answer
    Filed Under:
  • What is an example of convection?

    Q: What is an example of convection?

    A: Convection occurs when a cold pot of water is placed on a stove burner that transfers heat to the bottom of the pan. As the water in the pan warms, it begins to bubble on the surface. Generally, convection transfers heat from a warm area to a cooler one.
    See Full Answer
    Filed Under:
  • How are temperature and thermal energy different?

    Q: How are temperature and thermal energy different?

    A: The difference between temperature and thermal energy is that temperature measures the average kinetic speed of molecules and thermal energy is the total kinetic energy of all particles in a given substance. In other words, temperature measures the average speed of movement, and thermal energy measures the mass of a substance. Both temperature and thermal energy are made by the movement of particles.
    See Full Answer
    Filed Under:
  • What is the hottest part of the day?

    Q: What is the hottest part of the day?

    A: According to the National Satellite and Information Service, the hottest time of the day is generally around midafternoon. The exact time of the day that it is the hottest depends on where a person lives and what time of the year it is.
    See Full Answer
    Filed Under:
  • Which freezes faster: freshwater or saltwater?

    Q: Which freezes faster: freshwater or saltwater?

    A: Freshwater freezes faster that saltwater, according to the National Oceanic and Atmospheric Administration. Freshwater freezes at 32 F, while saltwater freezes at a slightly lower temperature, 28.4 F.
    See Full Answer
    Filed Under:
  • At what temperature does duct tape melt?

    Q: At what temperature does duct tape melt?

    A: Industry safety standards require duct tape to be nonflammable and safe to use in temperatures up to 200 degrees Fahrenheit. Adhesive endurance is reduced in temperatures over 180 degrees Fahrenheit.
    See Full Answer
    Filed Under:
  • Why are metals such good conductors of heat?

    Q: Why are metals such good conductors of heat?

    A: Metals conduct heat well for two reasons: metal ions pack very closely together in their molecular lattice, and electrons drifting through the metal carry kinetic energy around the lattice. The result is a quick elevation in particle motion that is expressed through heat energy. This conductivity is one reason why one rarely sees metal playground equipment anymore — although the slides go a lot faster than plastic ones, sitting on a slide on a hot summer afternoon is often quite painful.
    See Full Answer
    Filed Under:
  • How does an oil heater work?

    Q: How does an oil heater work?

    A: According to About.com expert Timothy Thiele, oil heaters are electric appliances that warm the surrounding air by passing hot oil through a series of metal tubes. Oil is the ideal filling for space heaters because it heats quickly and gets extremely hot without boiling. As the heater runs, the hot oil heats its metal tubing, which has poor heat retention and quickly releases the heat into the air.
    See Full Answer
    Filed Under:
  • What are examples of thermal energy?

    Q: What are examples of thermal energy?

    A: Thermal energy is the movement of particles within matter and is found in the sun, magma, heated water and even the human body. Heat represents the transfer of thermal energy between matter.
    See Full Answer
    Filed Under:
  • Q: What is a quasi equilibrium?

    A: A quasi-equilibrium refers to a quasi-equilibrium process in thermodynamics, which is a process in which the system only deviates from equilibrium by infinitesimal amounts. Quasi-equilibrium processes can be used to closely approximate real processes.
    See Full Answer
    Filed Under:
  • Q: What is a thermal overload relay?

    A: A thermal overload relay is a small electromechanical device that protects motors from overheating. These relays help to control the electrical current that goes to the motor to prevent it from overheating. If the motor pulls too much electricity for an extended period of time, the relay may flip and cut the power to the motor to prevent damage.
    See Full Answer
    Filed Under:
  • Q: How is a thermometer calibrated?

    A: A thermometer is usually calibrated using two approaches: the ice point method and the boiling point method. This temperature measuring device must be calibrated daily if repeatedly used. Otherwise, a thermometer should be adjusted prior to its initial usage, when switching from one temperature to another or every time it is dropped.
    See Full Answer
    Filed Under:
  • Q: What simple machines are in scissors?

    A: Scissors can be classified as both levers and wedges due to their shape and how they are assembled. The two simple machines being in one device, actually moves the scissors into the compound machine classification.
    See Full Answer
    Filed Under:
  • Q: How long does radiation stay in the body?

    A: Radiation does not stay in the body after the treatments have ended and will not be able to stay in the body unless there is a radioactive device implanted into the cancerous parts of the body. After receiving radiation, a person will not be radioactive.
    See Full Answer
    Filed Under:
  • Q: How do I fix my portable generator?

    A: There are many things that can cause a portable generator to break down. Testing it once a month, whether it is being used or not, allows time for troubleshooting problems and repairs. Become familiar with parts that require routine maintenance, replacement or repair. Keep a printed copy of the owner's manual. A digital copy may not help during a power outage.
    See Full Answer
    Filed Under: