1) State the direction of heat transfer by way of connection ?
2) Give one example of heat transfer by radiation ?
it's Isha
Answers
Answer:
Hi isha di
Explanation:
1) *Heat is always transferred vertically upwards through the convection process.
*The reason for this is that medium particles near a heat source absorb heat from the source and begin to move faster. 2) Heat transfer by radiation occurs when microwaves, infrared radiation, visible light, or another form of electromagnetic radiation is emitted or absorbed. An obvious example is the warming of the Earth by the Sun. A less obvious example is thermal radiation from the human body.
Answer:
Hi isha it's Rehan
Explanation:
1)By the process of convection, heat is always transferred vertically upwards. This happens because the medium particles near the source of heat absorb heat from the source and they start moving faster. As this result to medium at this place becomes less dense so it rises up and the medium above becomes much denser, moves down and takes their place. This current is set up in the medium which is called as convection current.
2)When you sit in the sun, you feel the warmth. We cannot get heat from the sun by the process of conduction or convection because most of the space between the sun and the earth is a vacuum and both of these modes of heat transfer require medium. Thus one must be getting heat from the sun by the mode of radiation.