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Answer:
It is the portion of internal energy that can be transferred from one substance to another.
Explanation:
Thermal energy is the energy obtained by an object due to the motion of its particles.
It is also known as internal energy as it is the energy within the particles due to their motion.
Therefore, we can conclude that it is the portion of internal energy that can be transferred from one substance to another.
Hope this helps!
The third answer is the one you want. You have to have an adjustable density. All other things being equal, if the tanks you use for holding just water when filled with water will let the sub sink, because the sub is made of a dense metal like iron or steel.
If on the other hand you fill these tanks with air, the net density will be below one and the sub will rise.
Examples of Everyday Radiation
Non-ionizing Radiation
Visible light
Infrared light
Near ultraviolet light
Microwaves
Low frequency waves
Radio waves
Waves produced by mobile phones
A campfire's heat
Thermal radiation
Extremely low frequency waves (3 - 30 Hz)
Very low frequency waves (3-30 kHz)
Power lines
Strong magnets
MRI
LEDs
Lasers
Light bulbs
Light from the sun
Remote controls
Cordless phones
Radio-frequency radiation such as televisions, FM and AM radio
Shortwave and CB's
Computer screens
Infrared lamps use to maintain food temperature in restaurants
Ionizing Radiation
Ultraviolet light
X-rays
Gamma-rays
Radioactive decay's particles
Cosmic rays
Alpha rays
Beta rays
Medical imaging equipment
Ionization of food
Sterilization of medical tools
Nuclear power production
Metal mining can result in exposure to ionizing radiation
Coal mining and power production from coal
Nuclear weapons
Galactic Cosmic Radiation (to which astronauts are exposed)
Solar Particle Event radiation (to which astronauts may be exposed)
Natural background radiation
Radiation therapy for specific forms of cancer
Radon
CT scans
Nuclear medical scans
X-Rays
Airport security scanners (in extremely high usage)