when do we feel more heat when we keep one hand above the candle flame and keeping on the side of the candle flame
Answers
Answer:
In the last chapter we looked at thermal systems. The thermal energy of an object is the amount of energy it has inside of it, in other words, its internal energy. In a thermal system, thermal energy is transferred from one object to another. Heat is the transfer of thermal energy from a system to its surroundings or from one object to another. This transfer of energy is from the object at a higher temperature to the object at a lower temperature.
It is very important to know that, in science, heat and temperature are not the same thing.
Heat is the transfer of thermal energy from a system to its surroundings or from one object to another as a result of a difference in temperature. Heat is measured in joules (J). This is because heat is a transfer of energy.
Temperature is a measure of how hot or cold a substance feels and it is measured in degrees Celsius (°C). Temperature is a measure of the average kinetic energy of the particles in an object or system. We use a thermometer to measure the temperature of an object or substance.
Heat is the transfer of energy. During energy transfer, the energy moves from the hotter object to the colder object. This means that the hotter object will cool down and the colder object will warm up. The energy transfer will continue until both objects are at the same temperature.
There are 3 ways in which thermal energy can be transferred from one object/substance to another, or from a system to its surroundings:
Let's have a look at these in more detail.
Have you noticed that when you put a cold, metal teaspoon into your hot cup of tea, the teaspoon handle also warms up after a while? Have you ever wondered how this warmth "moved" from the hot tea to the cold teaspoon and warmed it up? This is one way in which energy is transferred and this is called conduction. Let's find out how it works.
How does the handle of the metal teaspoon become hot when in a cup of tea?
When energy is transferred to an object, the energy of the particles increases. This means the particles have more kinetic energy and they start to move and vibrate faster. As the particles are moving faster they "bump" into other particles and transfer some of their energy to those neighbouring particles. In this way, the energy is transferred through the substance to the other end. This process is called conduction. The particles conduct the energy through the substance, as shown in the diagram.
Explanation:
The hand above the flame gets more heat due to convection. On the sides, there is no convection and so air does not feel as hot as at the top.❤️