Physics part 3
What is Avogadro's number?
6.022 x 10 to the power of 23
What are the examples of contact force?
Friction, normal force and tension
What are examples of non-ionising radiation?
Low-energy ultraviolet, visible light, infrared and microwaves
What holds an atom together?
The binding forces between the protons and electrons
What is given off as energy at the infrared part of the spectrum during heat production?
EMR
Why is attenuation a fundamental part of x-ray image formation?
It gives rise to the different intensities of x-rays passing through soft tissue / bone which ultimately produces the contrast seen in x-ray images
What is the result of ionisation?
Ejection of an electron from an atom and the formation of an ion pair
What is the annual dose from background radiation?
Roughly 2.5 mSv