Physics for Final
Terms
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- pigment
- material that absorbs light
- thermal expansion
- changes in size caused by heat or cold in temperature
- neutron
- neutral particle
- thermal equilibrium
- when objects in thermal contact reach the same temperature and no net heat flows between them
- opaque
- reflects and absorbs an object
- compound
- substance made of atoms of different elements in specific amounts
- temperature
- the quantity that tells how hot or cold something is compared to a standard
- photons
- small massless particles of electromagnetic energy
- elasticity
- ability of an object to return to original shape after being bendy, stretched or squeezed
- atoms
- building blocks of all matter, smallest part of an element
- ultrasonic
- greater than 20 khz
- polarization
- the vibrations of the wave are in only one direction
- resonance
- when frequency of force of vibration= objects natural frequency and a dramatic increase in amplitude results
- proton
- positive charged particle in nucleus
- complementary colors
- 2 colors that add together to produce white light
- heat
- transfer of energy between 2 objects
- infrasonic
- to low to be heard below 20 khz
- specific heat capacity
- amount of heat requires to raise a given mass of a substance by 1 degree celsius
- hertz
- unit for measuring frequency
- frequency
- how often... equation=1 over period
- electron
- negative charged particle
- transparent
- see through-visible to pass through
- natural frequency
- frequency at which an object vibrates, coins, balls
- period
- 1 over frequency
- doppler effect
- apparent change in frequency that occurs when a sound source is moving
- kinetic energy
- the energy that a body posses by virtue of being in motion
- calorie
- most common unit used for measuring heat
- density
- how much matter is squeezed into a given space
- elements
- substance made up of 1 atom, silver, gold, platinum
- molecules
- combination of atoms