sound

Question 1

why can’t sound travel through a vacuum

Answer 1

because there are no particles to vibrate

Question 2

how is sound produced

Answer 2

by vibration that make the air molecules oscillate

Question 3

why does sound travel trough solids the fastest

Answer 3

because the particles are close together, compared to gases where sound travels the slowest because the particles are far away from each other

Question 4

what is the wave hitting a surface called

Answer 4

incident wave

Question 5

was is the wave bouncing off the surface called

Answer 5

reflected wave

Question 6

what is a reflected sound also known as

Answer 6

an echo

Question 7

what are ultrasounds(>20kHz) used for

Answer 7

-used to make images of unborn
babies
-medical scans
- underwater searches.

Question 8

is light or sound faster

Answer 8

light

the speed of light is 300,000,000 m/s which is almost a million times faster than sound. when fireworks happen, you see the firework before hearing the bag sound