5 example of situation or object that uses convection current.
Answers
Answer:
Breeze
Boiling water
Air conditioner
Refrigerator
Hot air popper
Hot beverages
Convection oven
Explanation:
Breeze
The role of convection in breeze
The formation of sea and land breeze form the classic examples of convection. Going by the definition of convection, the molecules at a higher temperature displace the ones at a lower temperature. Similarly, in the afternoon, the surface of the land near the sea is warmer as compared to in the evening. Convection causes the air, which is closer to the land surface, to heat and, hence, rise. This warm air near the land is readily replaced by the cool air resulting in “Sea Breeze.” When its night, the tendency of land to cool down is more. However, the air above the sea water is warm and, therefore, rises up. Once this air rises, it is replaced by the cool air from the land, which is commonly referred to as “Land Breeze.”
Boiling Water
Boiling Waterconvection in boiling water
Convection comes into play while boiling water. What happens is that the cold water at the bottom heats up from the energy from the burner, and rises up. As the hot water rises, the cold water rushes in to replace it, which results in motion in the circular fashion.
Air-Conditioner
Air-Conditionerrole of convection in air conditioners
On a hot summer day, air-conditioners are used constantly. The process of cooling air in air-conditioners employs the very principle of convection. The air which is cold is released by the air-conditioners. Now, this cold air is denser than the warm air, and, hence, it sinks. The warm air, being less dense, rises and is drawn in by the air-conditioner. As a result, a convection current is set up and the room is cooled.
Refrigerator
Refrigeratorrole of convection in refrigerators
The working principle employed by the refrigerators is very much similar to that of the air-conditioners. The freezer, in case of refrigerators, is placed at the top. As mentioned above, the warm air, being less dense, rises up and, hence, it is cooled down by the freezer. Now, this cool air, being denser, sinks and, therefore, keeps the lower part of the fridge cool.
Hot Air Popper
Hot Air Popperrole of convection in hot air popper
The hot air popper which is used to make popcorn also utilises the principle of convection. The hot air popper has a fan, vent, and a heating element. When the popper is turned on, the fan is employed to blow air on the heating element through the vent. The heating element, in turn, warms the air; which then rises. Above the heating element, the popcorn kernels are placed. The kernels are heated when the hot air rises; therefore, resulting in the popping of the kernels.
Hot Beverage
Hot Beveragerole of convection in hot beverages
Who doesn’t like a hot cup of coffee on a winter day? Do you know the release of the heat from the steaming hot cup of coffee also works on the principle of convection? You might have often observed the steam coming out from the hot cup of coffee. The steam, in the form of warm air, rises because of the heat of the fluid. This steam is transferred to the air.
Convection Oven
Convection Ovenrole of convection in ovens
Who doesn’t like cakes and cookies? But do you know most of the ovens utilize the principle of convection? In the case of convection ovens, forced convection is employed. With heating, the molecules present in the air also get heated up and start moving. The food inside the oven is cooked due to this warm air.
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Example of five objects that uses convection current are as follows:
- The use of a convection mechanism in a convection oven helps to cook faster. It has fans for the circulation of air to cook more evenly at lower temperatures.
- In the refrigerator, convection is used to circulate cold air around the food.
- Household ventilation also has it. It helps the fresh air to enter the room.
- The water heater is also included in it. We get a continuous supply of water with the help of convection current.
- An air conditioner cools the room with the help of convection current.