Karteikarten
sound waves
Karten in diesem Stapel (11)
- 1soundwhen an object vibrates
vibrating objects make particles around it vibrate
then the neighboring particles vibrate
and so on - 2sound wavescaused by the series of vibrations that travels through the air
- 3equation for speedspeed = distance/time
- 4units for waves speedfrequency- Hertz
waves speed- m/s
wave length- m - 5vibrations in particlesgas- spaced out particles and move rapidly
liquid-close together but free to move
solid- tightly packed particle and confined structure
vibrations in a solid would be stronger due to the closely packed particles
more dense, more easily the sound travels - 6sound traveling faster in warm airparticles in warm air have more kinetic energy
particles are moving around faster in the warm air - 7factors of speed traveling fasterhigher density- faster the sound because of the tight particles
higher temperature- kinetic energy of the particles cause particles to move faster - 8light travels faster than soundwhen there's a firework, we can see it explode before we hear the sound
in a thunderstorm, we see the lightening first then we hear the thunder - 9lightlight can travel through a vacuum
that's how light from the sun reaches the earth
light does not need particles to travel
no object can travel faster than light - 10speed of sound in the airits 300m/s
when object exceeds this speed, its said to have broken the barrier
fighter jets
space shuttles
missiles/ bullets - 11eco'swhen reflected of a surface
hard
flat
smooth
objects that are soft absorb large proportion of sound