Definitions Flashcards
Hooke’s Law
The limit of proportionality is the point where the object no longer deforms elastically, and starts to deform inelastically.
Electric field
A region of force around a charged object
Equilibrium
No resultant force
and no resultant turning effect
Specific heat capacity
The amount of energy (in Joules) needed to increase the temperature of 1 kg of a substance by 1 degree Celsius.
Specific latent heat
The amount energy required to change the state of 1kg of a substance
Critical angle
The angle at which total internal reflection would occur if gone beyond.
Total internal reflection
Complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium
Monochromatic light
Single wave frequency of light
Ultrasound
Sound waves with a frequency greater than 20 000 Hz. (Upper range of human hearing)
Nuclear fission
The splitting of a large atomic nucleus into smaller nuclei.
Nuclear fusion
The joining together of two (hydrogen) nuclei to form a helium nucleus
Mass
The resistance that a body of matter offers to a change in its speed or position upon the application of a force
Magnetic field
The region around a magnet where a force acts on another magnet or on a magnetic material.
Unit prefixes (meter)
Giga 10^9
Mega 10^6
Kilo 10^3
Meter (standard for example)
Deci 10^-1
Centi 10^-2
Mili 10^-3
Micro 10^-6
Nano 10^-9
Gravitational field
A region in which a mass experiences a force due to gravitational attraction.
Radio Waves and uses
Long waves Long-distance AM radio
Medium wave Local Am radio
Short wave Amateur radio
VHF FM radio
UHF TV broadcast
Microwaves Mobile phones, wifi etc
Micro wave uses
Mobile phones
TV and communication satellites
Telephone links
Wi-fi
Radar
Microwave ovens
Infrared wave uses
Radiant heaters and grills
TV remotes
Security alarms
Light pulses in optical fibers
Ultraviolet waves uses
Skin tanning/cancer
Eye damage
Fluorescent
Kills bacteria
X-ray uses
X ray photography
Florescence
Kills and causes cancer cells
Gamma ray uses
Sterilizing medical equipment and food
