Why is the metal spoon in cup of hot chocolate hot?
The heat moves from the hot chocolate to the handle of the spoon by a process called thermal conduction. It is the transfer of heat energy from one object to another when they are in contact with eachother.
Why Does your hand get hot when you hold a cup of hot chocolate?
Conduction is the transfer of heat through direct contact. On the other hand, radiation is the direct transfer of electromagnetic waves in the form of heat through the space. Therefore, when you hold a mug of hot chocolate to warm your hands then due to the direct contact with the mug your hands get warmer.
Which best explains Alex error?
Alex studied the image shown. He concluded that the image shows thermal energy being transferred from the flames to the person’s hands through conduction. Which best explains Alex’s error? The image does not show conduction because the molecules of two substances or objects are not in direct contact.
Is a light bulb an example of radiation?
An incandescent light bulb radiates heat into its environment. With radiation, electromagnetic waves carry the energy. Electromagnetic radiation comes from accelerating electric charges. Heat energy transferred through radiation is as familiar as the light of day; in fact, it is the light of day.
Which two conditions must exist in order for radiation to occur?
Both substances must be the same temperature. At least one substance must be a liquid. Most of the molecules must be slow moving. The molecules of the substances must be touching.
What are the conditions for generating radiation?
In a fire, electrons of two successive molecules may bring a strain in electric field and it may produce light (or electric field wave). When there is a flow of gases in sun, the moving electrons moving in parallel may bring a strain in magnetic field and it may produce radio waves (or magnetic field waves).
What are the negative effects of electromagnetic radiation?
Reported symptoms include headaches, anxiety, suicide and depression, nausea, fatigue and loss of libido. To date, scientific evidence does not support a link between these symptoms and exposure to electromagnetic fields.
What do you think is the relationship of electromagnetic spectrum to radiation energy?
Basics of Radiation Therapy EM waves carry energy and transfer their energy upon interaction with matter. The energy associated with EM radiation is proportional to frequency and inversely proportional to wavelength. Thus, EM waves with shorter wavelengths have more energy.
Which type of radiation has the highest energy?
Gamma rays