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Why is vertical flame spread more rapid than horizontal flame spread?
The heat from a fire in the vertical spread is traveling upward and preheating the fuel about to be burned; whereas in horizontal spread, most of the convective heat is escaping into the atmosphere. Only the radiant heat is warming the material to the side.
What is an upward rebounding of a coastline due to the melting of glacial ice called?
An upward rebounding of a coastline due to the melting of glacial ice is called "isostatic rebound." This occurs when the weight of glaciers is removed, causing the land to rise as it adjusts to the decreased load.
Why do carbon dioxide and water vapour rise above the flame?
Carbon dioxide and water vapor rise above the flame because they are products of combustion that have higher temperatures and lower densities than the surrounding air. This causes them to be buoyant and therefore they rise upwards above the flame.
What is upward force of liquid or gas?
The upward force exerted by a liquid or gas on an object immersed in it is called buoyant force. This force is a result of the pressure difference between the top and bottom of the object, and it opposes the weight of the object, causing it to float or rise.
Why do flames burn upwards?
In a gravitational field, flames usually burn upwards because the hot gases in the flames are less dense than the surrounding gases, hence buoyant forces cause the hot, luminous gases (which we see as the flame) to rise. In a zero gravity environment, the direction of the flame is not necessarily "up" since "up" is arbitrary without a gravitational field.
Why does flames of acandle rises upward?
The flame of a candle rises upward due to the convection currents created by the heat from the flame. As the flame burns, it heats the surrounding air, causing it to become less dense and rise. This creates a continuous flow of hot air moving upward, carrying the flame along with it.
xWhy does a candle flame point upward when it is placed horizontally?
A candle flame points upward when placed horizontally due to the convection currents created by the heat of the flame. The heat causes the surrounding air to warm up and rise, creating a flow of air that pulls the flame upward. Additionally, the flame itself is composed of hot gases that are less dense than the cooler air around them, further contributing to the upward movement. This phenomenon demonstrates the principles of buoyancy and convection in fluid dynamics.
Why fire does not comes downward?
The heat generated by the fire warms surrounding gasses and they rise, pulling the flame up.
Why the flames of fire rise even though gravity pulls things downwards?
The hotter the air the less dense the molecules are so the rise. Just like in a thunderstorm, warm air is quickly thrust upward because of the pressure of the cooler, denser air. Gravity affects(pulls) the cooler, denser air more because it is heavier.
Why is vertical flame spread more rapid than horizontal flame spread?
The heat from a fire in the vertical spread is traveling upward and preheating the fuel about to be burned; whereas in horizontal spread, most of the convective heat is escaping into the atmosphere. Only the radiant heat is warming the material to the side.
What is upward force of water or air is called?
The upward force of water or air is called buoyant force. This force acts in the opposite direction to the force of gravity and helps objects float or rise in a fluid medium.
Why fire burns in the upward direction?
Fire burns upwards due to the process of convection. As the air around the fire heats up, it becomes less dense and rises. This creates a flow of air that draws more oxygen into the fire, allowing it to burn more vigorously and continue to rise.
Upward force on a bird's wing?
It is called Lift. The difference in pressure above and below the wigs as a bird moves through the air produces an upward force that causes the bird to rise.
What is a weird fact about magnesium?
Pouring water on conflagrated magnesium only accelerates the fire and may even cause an explosion (really just a rise in flame).
What is the name of the upward force that enable a bird to fly?
It is called Lift. The difference in pressure above and below the wigs as a bird moves through the air produces an upward force that causes the bird to rise.
What is an upward rebounding of a coastline due to the melting of glacial ice called?
An upward rebounding of a coastline due to the melting of glacial ice is called "isostatic rebound." This occurs when the weight of glaciers is removed, causing the land to rise as it adjusts to the decreased load.
Why do carbon dioxide and water vapour rise above the flame?
Carbon dioxide and water vapor rise above the flame because they are products of combustion that have higher temperatures and lower densities than the surrounding air. This causes them to be buoyant and therefore they rise upwards above the flame.
