ch 11 distance & displacement
What is the difference between distance and displacement
distance: how far an object has traveled
displacement: how far an object is from its original location
give an example of an object with potential energy
pen on the edge of the desk
a pencil looking bent in a cup is an example of
rarefraction
What is periodic motion
motion that repeats itself in regular intervals
what type of wave is a sound wave
longitudinal
I drove 20 meters east to the store than 30 meters west what distance have I traveled
50 meters
define mechanical energy
the sum of potential and kinetic energy in a system
define a wave
carries energy from one space to another
give a system that dampens
- slows down periodic motion
- brakes, pendulum in building
how do vocal cords create sound
- opening and closing of the glottis
What shape does a projectile motion make
parabola
about how efficient are man made mechanical energy sources
40 percent
during the doppler effect when an ambulance gets toward you the frequency of the sound gets (higher or lower)
higher
when a wave moves around an object this behavior is called what
diffraction
describe echolocation
bouncing of waves off of an object to discover its location
I drove 20 meters west and 30 meters east what is my displacement
10 meters
what are three types of renewable energy resources
- solar
- tidal
- hydroelectric
- wind - geothermal
what kind of wave behavior occurs when ultrasonic waves hit bone
the difference between the crest and the trough of a wave is called what
wave height
what are two uses of ultrasounds other than medicine
- fish finding
- architecture
What is the displacement of a car that goes 15 meters west and 10 meters south
18.02m
what are the three types of nonrenewable energy sources
- nuclear energy
- fossil fuels
- biomass energy
the burning of wood is what kind of energy
biomass
what is the difference between mechanical and electromagnetic waves?
mechanical waves go through solid liquid and gas
electromagnetic go through space and vaccums
what anatomical feature of the ear takes in vibrations and turns it into electrical signal
cochlea