Physics Final
Terms
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- Molecules
- two or more atoms combined to form a larger particle
- Elements
- make up of atoms of the same kind
- Thermal equilibrium
- when object in thermal contact with eachother reaches same temp. no net heat between them
- Temperature
- the quantity that tells you how hot or cold something is compared to a standard
- Resonace
- when frequenct of force vibration an object natural frequency a dramatic increase of amplitude results
- Transparent
- object that always allows light to pass
- Hertz
- unit used for measuring frequency
- Equation for Period
- 1/Frequency
- Specific heat capacity
- Amount of heat needed to raise a mass of substance 1 degree, water is high
- Atoms
- building blocks of matter
- Proton
- Positively charged particles in the nucleus
- Frequency
- how often something happends
- Photons
- small massless particles of electro magnetic energy
- Neutron
- Neutrally charged particles that orbit the nucleus of a atom
- Calorie
- The most commonly used unit for heat
- Natural frequency
- frequency at which an object vibrates
- Polarization
- when vibrations of a wave are only in one direction
- Equation for Frequency
- 1/Period
- Period
- time to complete one cycle
- Infrasonic
- Sound waves that are too low to hear. (Less then 20 HZ)
- complementary colors
- two colors that add together to make white light
- Kinetic energy
- energy and motion
- Opaque
- Object that absorbs light and don't let light pass through
- compound
- substance that is made up of atoms of different elements combined in fixed proportions
- Ultrasonic
- Sound waves that are too high to hear
- Pigment
- a material that absorbs light
- Elasticity
- a property of a body by which it changes shape when a force is applied and returned to normal shape
- Density
- how much matter is squeezed into a given amount of space
- Heat
- The energy difference between 1 object to another because of temp dif. high to low
- Doppler effect
- apparent change in frequency that occurs when a sound source is moving
- Thermal expansion
- changes in size cause by changes in Temp. EX: concrete