# data[].attributes.headline
Explain in detail why a heater is placed near the floor.

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Explain in detail why a heater is placed near the floor.

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Explain in detail why a hot cup of tea stays hot longer when covered with a lid.

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Explain in detail why a hot cup of tea stays hot longer when covered with a lid.

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Explain in detail why fire fighters stay low to the ground when entering a burning room.

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Explain in detail why fire fighters stay low to the ground when entering a burning room.

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When the air around the heater is heated, it gains heat and expand in volume. The hot air would become less dense and rises up into the room. As it rises, it displaced by the cold air, which is denser. The cold air sinks towards the hearter and heater would heat the cold air. Thus, convection current is set-up and continues until entire air in the room is at thermal equilibrium.

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so that it can heat the warmer air at the bottom and hot air rises as it is less dense. the cold air at at the top then which is denser sinks 

# data[].attributes.subject
so that it can heat the warmer air at the bottom and hot air rises as it is less dense. the cold air at at the top then which is denser sinks 

# data[].attributes.body
The heater is installed near the floor because when air at the bottom of the room is heated, the air become warmer and thus less dense. Hot air rises due to the low density and cool(denset) air sink down to be heated. Hence, convection current are set up in the room so that air in the room can be warmed more efficiently.

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Smoke rises due to the heat from the fire. The smoke is more dense. Firefighters stay on the ground as the air is clearer.

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Smoke rises due to the heat from the fire. The smoke is more dense. Firefighters stay on the ground as the air is clearer.

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Because warm air will rise as it is less dense so it will create a convection current which will continue until the atmosphere is the same temperature

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Hot air rises and cool air sinks. The heater is placed at the bottom to heat up the cool air. 

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Hot air rises and cool air sinks. The heater is placed at the bottom to heat up the cool air. 

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The Lid stops helps to form a convection current

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The Lid stops helps to form a convection current

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The lid stops cold air from entering the cup, and prevents heat transfer between the coffee and colder air.

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The lid traps hot air above the tea in the cup and prevents it from escaping into the surroundings, preventing heat loss due to convection. Without a lid, the hot air would rise out of the cup and into the surroundings. Cool air would then sink into the cup, cooling down the tea. Therefore, the lid will help the tea stay hot for longer.

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the heater is placed at the bottom to heat up cool air at the bottom

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The air in the room gets heated due to the fire. The hot air rises to the top and the cold air sinks to the bottom. The fire fighters stay low to the ground to prevent them from being 烫伤

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The air in the room gets heated due to the fire. The hot air rises to the top and the cold air sinks to the bottom. The fire fighters stay low to the ground to prevent them from being 烫伤

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because the hot air rises and cool air sinks

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because the hot air rises and cool air sinks

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bc it is hot in the first place

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The heat from the heater will cause the air molecules around it to expand, making it less dende and causing it to rise. The denser unheated air molecules will then sink and then get heated by the heater, and the cycle repeats

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The heat from the heater will cause the air molecules around it to expand, making it less dende and causing it to rise. The denser unheated air molecules will then sink and then get heated by the heater, and the cycle repeats

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KAWAII ,NII NICO NICO

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if you or a loved one is diagnosed with mesothelioma, you may be entitled to financial compensation

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Prevents Dylan's phone from going back into the toilet

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Prevents Dylan's phone from going back into the toilet

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Dylan was Swimming in the toilet bowl yesterday

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dylan huang secretly likes the smell of her sisters pee

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dylan huang secretly likes the smell of her sisters pee

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if you or your loved one is diagnosed with mesothelioma, you may be entitled to finian