informatioin systems Flashcards
device for transmitting/and or receiving radio waves
Aerial
measurement of frequency; the number of waves to pass a point in one second
Hertz
another word for aerial
Antenna
What are longitudinal waves?
waves that compress energy in the same direction as the wave movement
A device used to increase sounds produced by a radio
ampliefied/amplifier
electrical circuit device that selects wave frequesncies
tuner
a device that finds and receives signals, separates and filters waves
detector
what do waves do ?
carry and transmit energy
waves can be measured in terms of ?
amplitude, frequesncy, wavelength
the information transfer process ?
code, encode,transmit(ter), decode(r)
OR
code, message, transmission, decoder
energy stored in chemicals ?
chemical energy
potential energy ?
energy that can be released later
movement meant energy is ?
kinetic
energy from differences in temperature
heat
light energy is ?
energy from a light source
energy released as traveling vibrations ?
sound energy