Blog Tag Effects of heat

Effects of heat

The heat produce mainly the following three effects: The change in temperature of the body. The change in size or shape of the body. The change in state of the body. . . .

Change in different states of matter

Matter cannot be created or destroyed, but can change from one state to the other with the application or removal of heat (temperature). Each time matter changes state, it is simply the movement of molecules in them speeding up or slowing down. For example:Let us use water as an example. At room temperature, water is . . .

Behaviour of Matter

The particles in solids, liquids and gases all behave in different ways but result in a similar way. They all expand when heated up. Solids:  The particles in solids vibrate more and knock against each other when heated and result in taking up more space. The property of solids (metal) expansion makes it possible to join two metal pieces withou . . .

Advantages and disadvantages of expansion properties of solids, liquids and gases

All three states result in taking up more room, also know as expansion. The expansion properties of solids, liquids and gases have some advantages and disadvantages. One advantage of expanding metal is its use in thermometers. The mercury (liquid-metal) in the tube expands when they get hotter. One disadvantage of expansio . . .

Modes of heat transfer

Conduction Heat can be conducted between two bodies which are in contact with each other; heat "flows" from one to the other. Materials which conduct heat well are called conductors of heat. Electrical conductors (such as metals) are good conductors of heat. Materials which do not conduct heat well are called insulato . . .

Difference between conduction, convection and radiation

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Applications of Conductors and Insulators

An oven is made of double walls and the space between them is filled with wool, cork etc. The wool and cork are the insulators of heat. They prevent the heat of the oven to escape. Cooking utensils and pans are made of metals such as copper, brass, steel etc. The reason is that the metals are conductors of heat and so they heat up rapidly. Cookin . . .

Application of Convection

        Some important applications of convection are given below. Ventilators and windows are provided in rooms for proper ventilation. The reason is that when we breathe out in a room the sir in the room becomes warm and impure. The warm sir is less dense i.e. lighter, so it rises up and moves out through the ventilators. The . . .

Land and sea breeze

A sea breeze describes a wind that blows from the ocean inland towards land. This breeze occurs most often in the spring and summer months because of the greater temperature differences between the ocean and nearby land, particularly in the afternoon when the land is at maximum heating from the sun.  During the day, the sun heats up both the oce . . .

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