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.Know More
Heat itself does not rise, but hot air does. The cycle of rising hot air and cool sinking air is what creates many weather phenomenon, such as tornadoes and hurricanes as well as everyday thunderstorms and breezes. With global warming, the warmer seas and ground will cause this cycle to become exacerbated. There is a good chance that in the future, stronger winds, thunderstorms, tornadoes and hurricanes will become stronger and more frequent.
When the hot air rises, it creates thermals which are pockets rising upward. During the mornings, these thermals do not rise very high before cooling as the air is cooler after a night without radiating heat. Later in the day, the air near the ground gets warmer throughout the day and if the thermal rises high enough, some of the water vapor in the thermal builds up and forms into a cloud.Learn More
A battery's power, or the electrical current that it can provide, is greatly reduced when the temperature drops. A typical car battery, for example, has about 50 percent of its starting power at 0 degrees Fahrenheit when compared with its operation at 80 degrees Fahrenheit.Full Answer >
According to Elmhurst College, the molecules in a liquid are packed closely together and make random movements, as the molecules slip past each other. As the liquid is heated, the kinetic energy increases, which causes the motion of the molecules to increase. Eventually, the motion becomes so intense that the forces of attraction between the molecules are disrupted, and the molecules break free of the liquid, becoming a gas.Full Answer >
To calculate the adiabatic flame temperature of a substance, measure the substance's molar mass and its initial temperature. Calculate the heat of the reaction at 25 degrees Celsius to find the final adiabatic flame temperature.Full Answer >
Thermodynamics is the study of the energy and work of a system. It deals with only the large scale response of systems, which are observable and measurable. Thermodynamics has three principal laws: the zeroth law, the first law and the second law. Each law defines thermodynamic properties that help in understanding and predicting the operations of physical systems.Full Answer >