In our routine life, we touch different things. Few of them are hot, and others are cold. For example, a pan kept on a burning stove is hot, while its handle is not hot. Similarly, ice or the container containing ice is very cold. Among these hot and cold objects, some objects are very hot to touch, while others are less hot. Similarly, ice is cold and cannot be held for longer, while the other things that we keep in the refrigerator are not as cold as ice. You can only touch these objects and find if it is hot, very hot, cold, very cold, or at room temperature. But the exact way to do this is to find the temperature that can be measured using the thermometer.
Heat is a form of energy and it moves from a hot body to a cold body. Heat transfers from the hotter body to the colder body. Heat is measured in Joules as SI unit and CGS unit of heat is erg. Temperature can be used to know how hot the body is. There are different units of temperature, of which Celsius and Fahrenheit are the most commonly used.
There are different effects of heat:
Temperature is the degree of coldness or hotness of any object. Temperature is the property of an object that helps to determine whether the object is hot or cold. If the temperature value is high, it indicates the object is hot. On the other hand, low temperature describes that the object is cold. To exemplify, boiling water is very hot in touch, and melting ice is very cold.
Temperature can be measured using a thermometer.
There are different kinds of thermometers used for multiple purposes, hence having different scales of measurement. For example, a laboratory thermometer has a scale ranging from 0 degrees to 100 degrees with 100 divisions, and each division represents a degree. The laboratory thermometer and clinical thermometer have mercury in the glass tube. As the thermometer bulb gets touched with the object, the mercury inside it expands and rises. The position of the mercury on the thermometer scale gives the temperature of an object.
A clinical thermometer is mainly used to measure the temperature of the human body. If the temperature is more than a normal body temperature, the person is said to have a fever, and the doctor recommends medicines. The clinical thermometer is made of a glass tube having a thin bore inside. A glass bulb is present at one end of the thermometer containing mercury.
Features of Clinical Thermometer
Heat flows from an object at a higher temperature to another one at a lower temperature is called a transfer of heat. Let’s suppose we dip a spoon in hot water, the spoon temperature spikes, and a spoon will become hot. The flow of heat doesn’t work when the two objects are of the same temperature.
Methods of Heat Transfer
There are below three methods of heat transfer:
Insulator and Conductor of Heat
Materials through which the heat gets conducted easily are known as conductors of heat. Aluminum, iron, silver, and more are good heat conductors.
Some materials that don’t let the heat get conducted through them are insulators of heat. Glass, plastic, and wood are good insulators of heat.
To conclude, heat is a form of energy that flows from a hotter body to a colder one. There are different units of temperature that measure heat, viz. Fahrenheit and celsius. Temperature is measured using a thermometer. There are different thermometers, such as clinical, digital, and laboratory. Clinical thermometer and laboratory thermometer contain mercury inside it. Transfer of heat occurs through conduction, convection, and radiation.